#pragma once

#if defined(_MSC_VER)
__pragma(push_macro("min"))
#undef min
__pragma(push_macro("max"))
#undef max
#endif  // defined(_MSC_VER)
#pragma once

#include "sqlite3.h"
#pragma once

// #include "cxx_universal.h"

/*
 *  This header makes central C++ functionality on which sqlite_orm depends universally available:
 *  - alternative operator representations
 *  - ::size_t, ::ptrdiff_t, ::nullptr_t
 *  - C++ core language feature macros
 *  - macros for dealing with compiler quirks
 */

#include <iso646.h>  //  alternative operator representations
#include <cstddef>  //  sqlite_orm is using size_t, ptrdiff_t, nullptr_t everywhere, pull it in early

// earlier clang versions didn't make nullptr_t available in the global namespace via stddef.h,
// though it should have according to C++ documentation (see https://en.cppreference.com/w/cpp/types/nullptr_t#Notes).
// actually it should be available when including stddef.h
using std::nullptr_t;

// #include "cxx_core_features.h"

/*
 *  This header detects core C++ language features on which sqlite_orm depends.
 *  May be updated/overwritten by cxx_compiler_quirks.h
 */

#ifdef __has_cpp_attribute
#define SQLITE_ORM_HAS_CPP_ATTRIBUTE(attr) __has_cpp_attribute(attr)
#else
#define SQLITE_ORM_HAS_CPP_ATTRIBUTE(attr) 0L
#endif

#ifdef __has_include
#define SQLITE_ORM_HAS_INCLUDE(file) __has_include(file)
#else
#define SQLITE_ORM_HAS_INCLUDE(file) 0L
#endif

#if __cpp_aggregate_nsdmi >= 201304L
#define SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
#endif

#if __cpp_constexpr >= 201304L
#define SQLITE_ORM_RELAXED_CONSTEXPR_SUPPORTED
#endif

#if __cpp_noexcept_function_type >= 201510L
#define SQLITE_ORM_NOTHROW_ALIASES_SUPPORTED
#endif

#if __cpp_aggregate_bases >= 201603L
#define SQLITE_ORM_AGGREGATE_BASES_SUPPORTED
#endif

#if __cpp_fold_expressions >= 201603L
#define SQLITE_ORM_FOLD_EXPRESSIONS_SUPPORTED
#endif

#if __cpp_constexpr >= 201603L
#define SQLITE_ORM_CONSTEXPR_LAMBDAS_SUPPORTED
#endif

#if __cpp_range_based_for >= 201603L
#define SQLITE_ORM_SENTINEL_BASED_FOR_SUPPORTED
#endif

#if __cpp_if_constexpr >= 201606L
#define SQLITE_ORM_IF_CONSTEXPR_SUPPORTED
#endif

#if __cpp_inline_variables >= 201606L
#define SQLITE_ORM_INLINE_VARIABLES_SUPPORTED
#endif

#if __cpp_structured_bindings >= 201606L
#define SQLITE_ORM_STRUCTURED_BINDINGS_SUPPORTED
#endif

#if __cpp_generic_lambdas >= 201707L
#define SQLITE_ORM_EXPLICIT_GENERIC_LAMBDA_SUPPORTED
#else
#endif

#if __cpp_init_captures >= 201803L
#define SQLITE_ORM_PACK_EXPANSION_IN_INIT_CAPTURE_SUPPORTED
#endif

#if __cpp_consteval >= 201811L
#define SQLITE_ORM_CONSTEVAL_SUPPORTED
#endif

#if __cpp_char8_t >= 201811L
#define SQLITE_ORM_CHAR8T_SUPPORTED
#endif

#if __cpp_aggregate_paren_init >= 201902L
#define SQLITE_ORM_AGGREGATE_PAREN_INIT_SUPPORTED
#endif

#if __cpp_concepts >= 201907L
#define SQLITE_ORM_CONCEPTS_SUPPORTED
#endif

#if __cpp_nontype_template_args >= 201911L
#define SQLITE_ORM_CLASSTYPE_TEMPLATE_ARGS_SUPPORTED
#endif

#if __cpp_nontype_template_args >= 201911L
#define SQLITE_ORM_CLASSTYPE_TEMPLATE_ARGS_SUPPORTED
#endif

#if __cpp_pack_indexing >= 202311L
#define SQLITE_ORM_PACK_INDEXING_SUPPORTED
#endif

#if __cplusplus >= 202002L
#define SQLITE_ORM_DEFAULT_COMPARISONS_SUPPORTED
#endif

// #include "cxx_compiler_quirks.h"

/*
 *  This header defines macros for circumventing compiler quirks on which sqlite_orm depends.
 *  May amend cxx_core_features.h
 */

#ifdef __clang__
#define SQLITE_ORM_DO_PRAGMA(...) _Pragma(#__VA_ARGS__)
#endif

#ifdef __clang__
#define SQLITE_ORM_CLANG_SUPPRESS(warnoption, ...)                                                                     \
    SQLITE_ORM_DO_PRAGMA(clang diagnostic push)                                                                        \
    SQLITE_ORM_DO_PRAGMA(clang diagnostic ignored warnoption)                                                          \
    __VA_ARGS__                                                                                                        \
    SQLITE_ORM_DO_PRAGMA(clang diagnostic pop)

#else
#define SQLITE_ORM_CLANG_SUPPRESS(warnoption, ...) __VA_ARGS__
#endif

// clang has the bad habit of diagnosing missing brace-init-lists when constructing aggregates with base classes.
// This is a false positive, since the C++ standard is quite clear that braces for nested or base objects may be omitted,
// see https://en.cppreference.com/w/cpp/language/aggregate_initialization:
// "The braces around the nested initializer lists may be elided (omitted),
//  in which case as many initializer clauses as necessary are used to initialize every member or element of the corresponding subaggregate,
//  and the subsequent initializer clauses are used to initialize the following members of the object."
// In this sense clang should only warn about missing field initializers.
// Because we know what we are doing, we suppress the diagnostic message
#define SQLITE_ORM_CLANG_SUPPRESS_MISSING_BRACES(...) SQLITE_ORM_CLANG_SUPPRESS("-Wmissing-braces", __VA_ARGS__)

#if defined(_MSC_VER) && (_MSC_VER < 1920)
#define SQLITE_ORM_BROKEN_VARIADIC_PACK_EXPANSION
// Type replacement may fail if an alias template has a non-type template parameter from a dependent expression in it,
// `e.g. template<class T> using is_something = std::bool_constant<is_something_v<T>>;`
// Remedy, e.g.: use a derived struct: `template<class T> struct is_somthing : std::bool_constant<is_something_v<T>>;`
#define SQLITE_ORM_BROKEN_ALIAS_TEMPLATE_DEPENDENT_NTTP_EXPR
#endif

// These compilers are known to have problems with alias templates in SFINAE contexts:
// clang 3.5
// gcc 8.3
// msvc 15.9
// Type replacement may fail if an alias template has dependent expression or decltype in it.
// In these cases we have to use helper structures to break down the type alias.
// Note that the detection of specific compilers is so complicated because some compilers emulate other compilers,
// so we simply exclude all compilers that do not support C++20, even though this test is actually inaccurate.
#if(defined(_MSC_VER) && (_MSC_VER < 1920)) || (!defined(_MSC_VER) && (__cplusplus < 202002L))
#define SQLITE_ORM_BROKEN_ALIAS_TEMPLATE_DEPENDENT_EXPR_SFINAE
#endif

// overwrite SQLITE_ORM_CLASSTYPE_TEMPLATE_ARGS_SUPPORTED
#if(__cpp_nontype_template_args < 201911L) &&                                                                          \
    (defined(__clang__) && (__clang_major__ >= 12) && (__cplusplus >= 202002L))
#define SQLITE_ORM_CLASSTYPE_TEMPLATE_ARGS_SUPPORTED
#endif

// clang 10 chokes on concepts that don't depend on template parameters;
// when it tries to instantiate an expression in a requires expression, which results in an error,
// the compiler reports an error instead of dismissing the templated function.
#if defined(SQLITE_ORM_CONCEPTS_SUPPORTED) && (defined(__clang__) && (__clang_major__ == 10))
#define SQLITE_ORM_BROKEN_NONTEMPLATE_CONCEPTS
#endif

#if SQLITE_ORM_HAS_INCLUDE(<version>)
#include <version>
#endif

#ifdef SQLITE_ORM_CONSTEXPR_LAMBDAS_SUPPORTED
#define SQLITE_ORM_CONSTEXPR_LAMBDA_CPP17 constexpr
#else
#define SQLITE_ORM_CONSTEXPR_LAMBDA_CPP17
#endif

#ifdef SQLITE_ORM_INLINE_VARIABLES_SUPPORTED
#define SQLITE_ORM_INLINE_VAR inline
#else
#define SQLITE_ORM_INLINE_VAR
#endif

#ifdef SQLITE_ORM_IF_CONSTEXPR_SUPPORTED
#define SQLITE_ORM_CONSTEXPR_IF constexpr
#else
#define SQLITE_ORM_CONSTEXPR_IF
#endif

#if __cpp_lib_constexpr_functional >= 201907L
#define SQLITE_ORM_CONSTEXPR_CPP20 constexpr
#else
#define SQLITE_ORM_CONSTEXPR_CPP20
#endif

#if SQLITE_ORM_HAS_CPP_ATTRIBUTE(no_unique_address) >= 201803L
#define SQLITE_ORM_NOUNIQUEADDRESS [[no_unique_address]]
#else
#define SQLITE_ORM_NOUNIQUEADDRESS
#endif

#if SQLITE_ORM_HAS_CPP_ATTRIBUTE(likely) >= 201803L
#define SQLITE_ORM_CPP_LIKELY [[likely]]
#define SQLITE_ORM_CPP_UNLIKELY [[unlikely]]
#else
#define SQLITE_ORM_CPP_LIKELY
#define SQLITE_ORM_CPP_UNLIKELY
#endif

#ifdef SQLITE_ORM_CONSTEVAL_SUPPORTED
#define SQLITE_ORM_CONSTEVAL consteval
#else
#define SQLITE_ORM_CONSTEVAL constexpr
#endif

#if defined(SQLITE_ORM_CONCEPTS_SUPPORTED) && __cpp_lib_concepts >= 202002L
#define SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
#endif

#if __cpp_lib_ranges >= 201911L
#define SQLITE_ORM_CPP20_RANGES_SUPPORTED
#endif

// C++20 or later (unfortunately there's no feature test macro).
// Stupidly, clang says C++20, but `std::default_sentinel_t` was only implemented in libc++ 13 and libstd++-v3 10
// (the latter is used on Linux).
// gcc got it right and reports C++20 only starting with v10.
// The check here doesn't care and checks the library versions in use.
//
// Another way of detection might be the feature-test macro __cpp_lib_concepts
#if(__cplusplus >= 202002L) &&                                                                                         \
    ((!_LIBCPP_VERSION || _LIBCPP_VERSION >= 13000) && (!_GLIBCXX_RELEASE || _GLIBCXX_RELEASE >= 10))
#define SQLITE_ORM_STL_HAS_DEFAULT_SENTINEL
#endif

#if(defined(SQLITE_ORM_CLASSTYPE_TEMPLATE_ARGS_SUPPORTED) && defined(SQLITE_ORM_INLINE_VARIABLES_SUPPORTED) &&         \
    defined(SQLITE_ORM_CONSTEVAL_SUPPORTED)) &&                                                                        \
    (defined(SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED))
#define SQLITE_ORM_WITH_CPP20_ALIASES
#endif

#if defined(SQLITE_ORM_FOLD_EXPRESSIONS_SUPPORTED) && defined(SQLITE_ORM_IF_CONSTEXPR_SUPPORTED)
#define SQLITE_ORM_WITH_CTE
#endif

// define the inline namespace "literals" so that it is available even if it was not introduced by a feature
namespace sqlite_orm {
    inline namespace literals {}
}
#pragma once

#include <type_traits>  //  std::enable_if, std::is_same, std::is_empty, std::is_aggregate
#if __cpp_lib_unwrap_ref >= 201811L
#include <utility>  //  std::reference_wrapper
#else
#include <functional>  //  std::reference_wrapper
#endif

// #include "functional/cxx_core_features.h"

// #include "functional/cxx_type_traits_polyfill.h"

#include <type_traits>

// #include "cxx_universal.h"

// #include "mpl/conditional.h"

namespace sqlite_orm {
    namespace internal {
        namespace mpl {

            /*
             *  Binary quoted metafunction equivalent to `std::conditional`,
             *  using an improved implementation in respect to memoization.
             *  
             *  Because `conditional` is only typed on a single bool non-type template parameter,
             *  the compiler only ever needs to memoize 2 instances of this class template.
             *  The type selection is a nested cheap alias template.
             */
            template<bool>
            struct conditional {
                template<typename A, typename>
                using fn = A;
            };

            template<>
            struct conditional<false> {
                template<typename, typename B>
                using fn = B;
            };

            // directly invoke `conditional`
            template<bool v, typename A, typename B>
            using conditional_t = typename conditional<v>::template fn<A, B>;
        }
    }

    namespace mpl = internal::mpl;
}

namespace sqlite_orm {
    namespace internal {
        namespace polyfill {
#if __cpp_lib_void_t >= 201411L
            using std::void_t;
#else
            /*
             *  Implementation note: Conservative implementation due to CWG issue 1558 (Unused arguments in alias template specializations).
             */
            template<class...>
            struct always_void {
                using type = void;
            };
            template<class... T>
            using void_t = typename always_void<T...>::type;
#endif

#if __cpp_lib_bool_constant >= 201505L
            using std::bool_constant;
#else
            template<bool v>
            using bool_constant = std::integral_constant<bool, v>;
#endif

#if __cpp_lib_logical_traits >= 201510L && __cpp_lib_type_trait_variable_templates >= 201510L
            using std::conjunction;
            using std::conjunction_v;
            using std::disjunction;
            using std::disjunction_v;
            using std::negation;
            using std::negation_v;
#else
            template<typename...>
            struct conjunction : std::true_type {};
            template<typename B1>
            struct conjunction<B1> : B1 {};
            template<typename B1, typename... Bn>
            struct conjunction<B1, Bn...> : mpl::conditional_t<bool(B1::value), conjunction<Bn...>, B1> {};
            template<typename... Bs>
            SQLITE_ORM_INLINE_VAR constexpr bool conjunction_v = conjunction<Bs...>::value;

            template<typename...>
            struct disjunction : std::false_type {};
            template<typename B1>
            struct disjunction<B1> : B1 {};
            template<typename B1, typename... Bn>
            struct disjunction<B1, Bn...> : mpl::conditional_t<bool(B1::value), B1, disjunction<Bn...>> {};
            template<typename... Bs>
            SQLITE_ORM_INLINE_VAR constexpr bool disjunction_v = disjunction<Bs...>::value;

            template<typename B>
            struct negation : bool_constant<!bool(B::value)> {};
            template<typename B>
            SQLITE_ORM_INLINE_VAR constexpr bool negation_v = negation<B>::value;
#endif

#if __cpp_lib_remove_cvref >= 201711L
            using std::remove_cvref, std::remove_cvref_t;
#else
            template<class T>
            struct remove_cvref : std::remove_cv<std::remove_reference_t<T>> {};

            template<class T>
            using remove_cvref_t = typename remove_cvref<T>::type;
#endif

#if __cpp_lib_type_identity >= 201806L
            using std::type_identity, std::type_identity_t;
#else
            template<class T>
            struct type_identity {
                using type = T;
            };

            template<class T>
            using type_identity_t = typename type_identity<T>::type;
#endif

#if 0  // __cpp_lib_detect >= 0L  //  library fundamentals TS v2, [meta.detect]
            using std::nonesuch;
            using std::detector;
            using std::is_detected, std::is_detected_v;
            using std::detected, std::detected_t;
            using std::detected_or, std::detected_or_t;
#else
            struct nonesuch {
                ~nonesuch() = delete;
                nonesuch(const nonesuch&) = delete;
                void operator=(const nonesuch&) = delete;
            };

            template<class Default, class AlwaysVoid, template<class...> class Op, class... Args>
            struct detector {
                using value_t = std::false_type;
                using type = Default;
            };

            template<class Default, template<class...> class Op, class... Args>
            struct detector<Default, polyfill::void_t<Op<Args...>>, Op, Args...> {
                using value_t = std::true_type;
                using type = Op<Args...>;
            };

            template<template<class...> class Op, class... Args>
            using is_detected = typename detector<nonesuch, void, Op, Args...>::value_t;

            template<template<class...> class Op, class... Args>
            using detected = detector<nonesuch, void, Op, Args...>;

            template<template<class...> class Op, class... Args>
            using detected_t = typename detector<nonesuch, void, Op, Args...>::type;

            template<class Default, template<class...> class Op, class... Args>
            using detected_or = detector<Default, void, Op, Args...>;

            template<class Default, template<class...> class Op, class... Args>
            using detected_or_t = typename detected_or<Default, Op, Args...>::type;

            template<template<class...> class Op, class... Args>
            SQLITE_ORM_INLINE_VAR constexpr bool is_detected_v = is_detected<Op, Args...>::value;
#endif

#if 0  // proposed but not pursued
            using std::is_specialization_of, std::is_specialization_of_t, std::is_specialization_of_v;
#else
            // is_specialization_of: https://github.com/cplusplus/papers/issues/812

            template<typename Type, template<typename...> class Primary>
            SQLITE_ORM_INLINE_VAR constexpr bool is_specialization_of_v = false;

            template<template<typename...> class Primary, class... Types>
            SQLITE_ORM_INLINE_VAR constexpr bool is_specialization_of_v<Primary<Types...>, Primary> = true;

            template<typename Type, template<typename...> class Primary>
            struct is_specialization_of : bool_constant<is_specialization_of_v<Type, Primary>> {};
#endif

            template<typename...>
            SQLITE_ORM_INLINE_VAR constexpr bool always_false_v = false;

            template<size_t I>
            using index_constant = std::integral_constant<size_t, I>;
        }
    }

    namespace polyfill = internal::polyfill;
}

namespace sqlite_orm {
    // C++ generic traits used throughout the library
    namespace internal {
        template<class T, class... Types>
        using is_any_of = polyfill::disjunction<std::is_same<T, Types>...>;

        template<class T>
        struct value_unref_type : polyfill::remove_cvref<T> {};

        template<class T>
        struct value_unref_type<std::reference_wrapper<T>> : std::remove_const<T> {};

        template<class T>
        using value_unref_type_t = typename value_unref_type<T>::type;

        template<class T>
        using is_eval_order_garanteed =
#if __cpp_lib_is_aggregate >= 201703L
            std::is_aggregate<T>;
#else
            std::is_pod<T>;
#endif

        // enable_if for types
        template<template<typename...> class Op, class... Args>
        using match_if = std::enable_if_t<Op<Args...>::value>;

        // enable_if for types
        template<template<typename...> class Op, class... Args>
        using match_if_not = std::enable_if_t<polyfill::negation<Op<Args...>>::value>;

        // enable_if for types
        template<class T, template<typename...> class Primary>
        using match_specialization_of = std::enable_if_t<polyfill::is_specialization_of<T, Primary>::value>;

        // enable_if for functions
        template<template<typename...> class Op, class... Args>
        using satisfies = std::enable_if_t<Op<Args...>::value, bool>;

        // enable_if for functions
        template<template<typename...> class Op, class... Args>
        using satisfies_not = std::enable_if_t<polyfill::negation<Op<Args...>>::value, bool>;

        // enable_if for functions
        template<class T, template<typename...> class Primary>
        using satisfies_is_specialization_of =
            std::enable_if_t<polyfill::is_specialization_of<T, Primary>::value, bool>;
    }

    // type name template aliases for syntactic sugar
    namespace internal {
        template<typename T>
        using type_t = typename T::type;

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        template<auto a>
        using auto_type_t = typename decltype(a)::type;
#endif

        template<typename T>
        using value_type_t = typename T::value_type;

        template<typename T>
        using field_type_t = typename T::field_type;

        template<typename T>
        using constraints_type_t = typename T::constraints_type;

        template<typename T>
        using columns_tuple_t = typename T::columns_tuple;

        template<typename T>
        using object_type_t = typename T::object_type;

        template<typename T>
        using elements_type_t = typename T::elements_type;

        template<typename T>
        using table_type_t = typename T::table_type;

        template<typename T>
        using target_type_t = typename T::target_type;

        template<typename T>
        using left_type_t = typename T::left_type;

        template<typename T>
        using right_type_t = typename T::right_type;

        template<typename T>
        using on_type_t = typename T::on_type;

        template<typename T>
        using expression_type_t = typename T::expression_type;

        template<class As>
        using alias_type_t = typename As::alias_type;

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        template<class T>
        using udf_type_t = typename T::udf_type;

        template<auto a>
        using auto_udf_type_t = typename decltype(a)::udf_type;
#endif

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
        template<typename T>
        using cte_moniker_type_t = typename T::cte_moniker_type;

        template<typename T>
        using cte_mapper_type_t = typename T::cte_mapper_type;

        // T::alias_type or nonesuch
        template<class T>
        using alias_holder_type_or_none = polyfill::detected<type_t, T>;

        template<class T>
        using alias_holder_type_or_none_t = typename alias_holder_type_or_none<T>::type;
#endif

#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
        template<typename T>
        concept stateless = std::is_empty_v<T>;
#endif
    }

#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
    template<class T>
    concept orm_names_type = requires { typename T::type; };
#endif
}
#pragma once

namespace sqlite_orm {

    namespace internal {

        enum class collate_argument {
            binary,
            nocase,
            rtrim,
        };
    }

}
#pragma once

#include <system_error>  //  std::system_error
#include <ostream>  //  std::ostream
#include <string>  //  std::string
#include <tuple>  //  std::tuple
#include <type_traits>  //  std::is_base_of, std::false_type, std::true_type

// #include "functional/cxx_universal.h"

// #include "functional/cxx_type_traits_polyfill.h"

// #include "functional/mpl.h"

/*
 *  Symbols for 'template metaprogramming' (compile-time template programming),
 *  inspired by the MPL of Aleksey Gurtovoy and David Abrahams, and the Mp11 of Peter Dimov and Bjorn Reese.
 *  
 *  Currently, the focus is on facilitating advanced type filtering,
 *  such as filtering columns by constraints having various traits.
 *  Hence it contains only a very small subset of a full MPL.
 *  
 *  Three key concepts are critical to understanding:
 *  1. A 'trait' is a class template with a nested `type` typename.
 *     The term 'trait' might be too narrow or not entirely accurate, however in the STL those class templates are summarized as "Type transformations".
 *     hence being "transformation type traits".
 *     It was the traditional way of transforming types before the arrival of alias templates.
 *     E.g. `template<class T> struct x { using type = T; };`
 *     They are of course still available today, but are rather used as building blocks.
 *  2. A 'metafunction' is an alias template for a class template or a nested template expression, whose instantiation yields a type.
 *     E.g. `template<class T> using alias_op_t = typename x<T>::type`
 *  3. A 'quoted metafunction' (aka 'metafunction class') is a certain form of metafunction representation that enables higher-order metaprogramming.
 *     More precisely, it's a class with a nested metafunction called "fn".
 *     Correspondingly, a quoted metafunction invocation is defined as invocation of its nested "fn" metafunction.
 *
 *  Conventions:
 *  - "Fn" is the name of a template template parameter for a metafunction.
 *  - "Q" is the name of class template parameter for a quoted metafunction.
 *  - "_fn" is a suffix for a class or alias template that accepts metafunctions and turns them into quoted metafunctions.
 *  - "higher order" denotes a metafunction that operates on another metafunction (i.e. takes it as an argument).
 */

#include <type_traits>  //  std::true_type, std::false_type, std::is_same, std::negation, std::conjunction, std::disjunction
#ifdef SQLITE_ORM_RELAXED_CONSTEXPR_SUPPORTED
#include <initializer_list>
#else
#include <array>
#endif

// #include "cxx_universal.h"
//  ::size_t
// #include "cxx_type_traits_polyfill.h"

// #include "mpl/conditional.h"

namespace sqlite_orm {
    namespace internal {
        namespace mpl {
            template<template<class...> class Fn>
            struct indirectly_test_metafunction;

            /*
             *  Determines whether a class template has a nested metafunction `fn`.
             * 
             *  Implementation note: the technique of specialiazing on the inline variable must come first because
             *  of older compilers having problems with the detection of dependent templates [SQLITE_ORM_BROKEN_ALIAS_TEMPLATE_DEPENDENT_EXPR_SFINAE].
             */
            template<class T, class SFINAE = void>
            SQLITE_ORM_INLINE_VAR constexpr bool is_quoted_metafuntion_v = false;
            template<class Q>
            SQLITE_ORM_INLINE_VAR constexpr bool
                is_quoted_metafuntion_v<Q, polyfill::void_t<indirectly_test_metafunction<Q::template fn>>> = true;

            template<class T>
            struct is_quoted_metafuntion : polyfill::bool_constant<is_quoted_metafuntion_v<T>> {};

            /*  
             *  Type pack.
             */
            template<class...>
            struct pack {};

            /*
             *  The indirection through `defer_fn` works around the language inability
             *  to expand `Args...` into a fixed parameter list of an alias template.
             *  
             *  Also, legacy compilers need an extra layer of indirection, otherwise type replacement may fail
             *  if alias template `Fn` has a dependent expression in it.
             */
            template<template<class...> class Fn, class... Args>
            struct defer_fn {
                using type = Fn<Args...>;
            };

            /*
             *  The indirection through `defer` works around the language inability
             *  to expand `Args...` into a fixed parameter list of an alias template.
             */
            template<class Q, class... Args>
            struct defer {
                using type = typename Q::template fn<Args...>;
            };

            /*
             *  Invoke metafunction.
             */
            template<template<class...> class Fn, class... Args>
            using invoke_fn_t = typename defer_fn<Fn, Args...>::type;

            /*
             *  Invoke quoted metafunction by invoking its nested metafunction.
             */
            template<class Q, class... Args>
            using invoke_t = typename defer<Q, Args...>::type;

            /*
             *  Turn metafunction into a quoted metafunction.
             *  
             *  Invocation of the nested metafunction `fn` is SFINAE-friendly (detection idiom).
             *  This is necessary because `fn` is a proxy to the originally quoted metafunction,
             *  and the instantiation of the metafunction might be an invalid expression.
             */
            template<template<class...> class Fn>
            struct quote_fn {
                template<class InvocableTest, template<class...> class, class...>
                struct invoke_this_fn {
                    // error N: 'type': is not a member of any direct or indirect base class of 'quote_fn<Fn>::invoke_this_fn<void,Fn,T>'
                    // means that the metafunction cannot be called with the passed arguments.
                };

                template<template<class...> class F, class... Args>
                struct invoke_this_fn<polyfill::void_t<F<Args...>>, F, Args...> {
                    using type = F<Args...>;
                };

                template<class... Args>
                using fn = typename invoke_this_fn<void, Fn, Args...>::type;
            };

            /*
             *  Indirection wrapper for higher-order metafunctions,
             *  specialized on the argument indexes where metafunctions appear.
             */
            template<size_t...>
            struct higherorder;

            template<>
            struct higherorder<0u> {
                template<template<template<class...> class Fn, class... Args2> class HigherFn, class Q, class... Args>
                struct defer_higher_fn {
                    using type = HigherFn<Q::template fn, Args...>;
                };

                /*
                 *  Turn higher-order metafunction into a quoted metafunction.
                 */
                template<template<template<class...> class Fn, class... Args2> class HigherFn>
                struct quote_fn {
                    template<class Q, class... Args>
                    using fn = typename defer_higher_fn<HigherFn, Q, Args...>::type;
                };
            };

            /*
             *  Quoted metafunction that extracts the nested metafunction of its quoted metafunction argument,
             *  quotes the extracted metafunction and passes it on to the next quoted metafunction
             *  (kind of the inverse of quoting).
             */
            template<class Q>
            struct pass_extracted_fn_to {
                template<class... Args>
                struct invoke_this_fn {
                    using type = typename Q::template fn<Args...>;
                };

                // extract class template, quote, pass on
                template<template<class...> class Fn, class... T>
                struct invoke_this_fn<Fn<T...>> {
                    using type = typename Q::template fn<quote_fn<Fn>>;
                };

                template<class... Args>
                using fn = typename invoke_this_fn<Args...>::type;
            };

            /*
             *  Quoted metafunction that invokes the specified quoted metafunctions,
             *  and passes their results on to the next quoted metafunction.
             */
            template<class Q, class... Qs>
            struct pass_result_of {
                // invoke `Fn`, pass on their result
                template<class... Args>
                using fn = typename Q::template fn<typename defer<Qs, Args...>::type...>;
            };

            /*
             *  Quoted metafunction that invokes the specified metafunctions,
             *  and passes their results on to the next quoted metafunction.
             */
            template<class Q, template<class...> class... Fn>
            using pass_result_of_fn = pass_result_of<Q, quote_fn<Fn>...>;

            /*
             *  Bind arguments at the front of a quoted metafunction.
             */
            template<class Q, class... Bound>
            struct bind_front {
                template<class... Args>
                using fn = typename Q::template fn<Bound..., Args...>;
            };

            /*
             *  Bind arguments at the back of a quoted metafunction.
             */
            template<class Q, class... Bound>
            struct bind_back {
                template<class... Args>
                using fn = typename Q::template fn<Args..., Bound...>;
            };

            /*
             *  Quoted metafunction equivalent to `polyfill::always_false`.
             *  It ignores arguments passed to the metafunction, and always returns the specified type.
             */
            template<class T>
            struct always {
                template<class... /*Args*/>
                using fn = T;
            };

            /*
             *  Unary quoted metafunction equivalent to `std::type_identity_t`.
             */
            using identity = quote_fn<polyfill::type_identity_t>;

            /*
             *  Quoted metafunction equivalent to `std::negation`.
             */
            template<class TraitQ>
            using not_ = pass_result_of<quote_fn<polyfill::negation>, TraitQ>;

            /*
             *  Quoted metafunction equivalent to `std::conjunction`.
             */
            template<class... TraitQ>
            struct conjunction {
                template<class... Args>
                using fn = std::true_type;
            };

            template<class FirstQ, class... TraitQ>
            struct conjunction<FirstQ, TraitQ...> {
                // match last or `std::false_type`
                template<class ArgPack, class ResultTrait, class...>
                struct invoke_this_fn {
                    static_assert(std::is_same<ResultTrait, std::true_type>::value ||
                                      std::is_same<ResultTrait, std::false_type>::value,
                                  "Resulting trait must be a std::bool_constant");
                    using type = ResultTrait;
                };

                // match `std::true_type` and one or more remaining
                template<class... Args, class NextQ, class... RestQ>
                struct invoke_this_fn<pack<Args...>, std::true_type, NextQ, RestQ...>
                    : invoke_this_fn<pack<Args...>,
                                     // access resulting trait::type
                                     typename defer<NextQ, Args...>::type::type,
                                     RestQ...> {};

                template<class... Args>
                using fn = typename invoke_this_fn<pack<Args...>,
                                                   // access resulting trait::type
                                                   typename defer<FirstQ, Args...>::type::type,
                                                   TraitQ...>::type;
            };

            /*
             *  Quoted metafunction equivalent to `std::disjunction`.
             */
            template<class... TraitQ>
            struct disjunction {
                template<class... Args>
                using fn = std::false_type;
            };

            template<class FirstQ, class... TraitQ>
            struct disjunction<FirstQ, TraitQ...> {
                // match last or `std::true_type`
                template<class ArgPack, class ResultTrait, class...>
                struct invoke_this_fn {
                    static_assert(std::is_same<ResultTrait, std::true_type>::value ||
                                      std::is_same<ResultTrait, std::false_type>::value,
                                  "Resulting trait must be a std::bool_constant");
                    using type = ResultTrait;
                };

                // match `std::false_type` and one or more remaining
                template<class... Args, class NextQ, class... RestQ>
                struct invoke_this_fn<pack<Args...>, std::false_type, NextQ, RestQ...>
                    : invoke_this_fn<pack<Args...>,
                                     // access resulting trait::type
                                     typename defer<NextQ, Args...>::type::type,
                                     RestQ...> {};

                template<class... Args>
                using fn = typename invoke_this_fn<pack<Args...>,
                                                   // access resulting trait::type
                                                   typename defer<FirstQ, Args...>::type::type,
                                                   TraitQ...>::type;
            };

            /*
             *  Metafunction equivalent to `std::conjunction`.
             */
            template<template<class...> class... TraitFn>
            using conjunction_fn = pass_result_of_fn<quote_fn<polyfill::conjunction>, TraitFn...>;

            /*
             *  Metafunction equivalent to `std::disjunction`.
             */
            template<template<class...> class... TraitFn>
            using disjunction_fn = pass_result_of_fn<quote_fn<polyfill::disjunction>, TraitFn...>;

            /*
             *  Metafunction equivalent to `std::negation`.
             */
            template<template<class...> class Fn>
            using not_fn = pass_result_of_fn<quote_fn<polyfill::negation>, Fn>;

            /*
             *  Bind arguments at the front of a metafunction.
             */
            template<template<class...> class Fn, class... Bound>
            using bind_front_fn = bind_front<quote_fn<Fn>, Bound...>;

            /*
             *  Bind arguments at the back of a metafunction.
             */
            template<template<class...> class Fn, class... Bound>
            using bind_back_fn = bind_back<quote_fn<Fn>, Bound...>;

            /*
             *  Bind a metafunction and arguments at the front of a higher-order metafunction.
             */
            template<template<template<class...> class Fn, class... Args2> class HigherFn,
                     template<class...>
                     class BoundFn,
                     class... Bound>
            using bind_front_higherorder_fn =
                bind_front<higherorder<0>::quote_fn<HigherFn>, quote_fn<BoundFn>, Bound...>;

#ifdef SQLITE_ORM_RELAXED_CONSTEXPR_SUPPORTED
            constexpr size_t find_first_true_helper(std::initializer_list<bool> values) {
                size_t i = 0;
                for(auto first = values.begin(); first != values.end() && !*first; ++first) {
                    ++i;
                }
                return i;
            }

            constexpr size_t count_true_helper(std::initializer_list<bool> values) {
                size_t n = 0;
                for(auto first = values.begin(); first != values.end(); ++first) {
                    n += *first;
                }
                return n;
            }
#else
            template<size_t N>
            constexpr size_t find_first_true_helper(const std::array<bool, N>& values, size_t i = 0) {
                return i == N || values[i] ? 0 : 1 + find_first_true_helper(values, i + 1);
            }

            template<size_t N>
            constexpr size_t count_true_helper(const std::array<bool, N>& values, size_t i = 0) {
                return i == N ? 0 : values[i] + count_true_helper(values, i + 1);
            }
#endif

            /*
             *  Quoted metafunction that invokes the specified quoted predicate metafunction on each element of a type list,
             *  and returns the index constant of the first element for which the predicate returns true.
             */
            template<class PredicateQ>
            struct finds {
                template<class Pack, class ProjectQ>
                struct invoke_this_fn {
                    static_assert(polyfill::always_false_v<Pack>,
                                  "`finds` must be invoked with a type list as first argument.");
                };

                template<template<class...> class Pack, class... T, class ProjectQ>
                struct invoke_this_fn<Pack<T...>, ProjectQ> {
                    // hoist result into `value` [SQLITE_ORM_BROKEN_ALIAS_TEMPLATE_DEPENDENT_NTTP_EXPR]
                    static constexpr size_t value = find_first_true_helper
#ifndef SQLITE_ORM_RELAXED_CONSTEXPR_SUPPORTED
                        <sizeof...(T)>
#endif
                        ({PredicateQ::template fn<typename ProjectQ::template fn<T>>::value...});
                    using type = polyfill::index_constant<value>;
                };

                template<class Pack, class ProjectQ = identity>
                using fn = typename invoke_this_fn<Pack, ProjectQ>::type;
            };

            template<template<class...> class PredicateFn>
            using finds_fn = finds<quote_fn<PredicateFn>>;

            /*
             *  Quoted metafunction that invokes the specified quoted predicate metafunction on each element of a type list,
             *  and returns the index constant of the first element for which the predicate returns true.
             */
            template<class PredicateQ>
            struct counts {
                template<class Pack, class ProjectQ>
                struct invoke_this_fn {
                    static_assert(polyfill::always_false_v<Pack>,
                                  "`counts` must be invoked with a type list as first argument.");
                };

                template<template<class...> class Pack, class... T, class ProjectQ>
                struct invoke_this_fn<Pack<T...>, ProjectQ> {
                    // hoist result into `value` [SQLITE_ORM_BROKEN_ALIAS_TEMPLATE_DEPENDENT_NTTP_EXPR]
                    static constexpr size_t value = count_true_helper
#ifndef SQLITE_ORM_RELAXED_CONSTEXPR_SUPPORTED
                        <sizeof...(T)>
#endif
                        ({PredicateQ::template fn<typename ProjectQ::template fn<T>>::value...});
                    using type = polyfill::index_constant<value>;
                };

                template<class Pack, class ProjectQ = identity>
                using fn = typename invoke_this_fn<Pack, ProjectQ>::type;
            };

            template<template<class...> class PredicateFn>
            using counts_fn = counts<quote_fn<PredicateFn>>;

            /*
             *  Quoted metafunction that invokes the specified quoted predicate metafunction on each element of a type list,
             *  and returns the index constant of the first element for which the predicate returns true.
             */
            template<class TraitQ>
            struct contains {
                template<class Pack, class ProjectQ>
                struct invoke_this_fn {
                    static_assert(polyfill::always_false_v<Pack>,
                                  "`contains` must be invoked with a type list as first argument.");
                };

                template<template<class...> class Pack, class... T, class ProjectQ>
                struct invoke_this_fn<Pack<T...>, ProjectQ> {
                    // hoist result into `value` [SQLITE_ORM_BROKEN_ALIAS_TEMPLATE_DEPENDENT_NTTP_EXPR]
                    static constexpr size_t value =
                        static_cast<bool>(count_true_helper
#ifndef SQLITE_ORM_RELAXED_CONSTEXPR_SUPPORTED
                                          <sizeof...(T)>
#endif
                                          ({TraitQ::template fn<typename ProjectQ::template fn<T>>::value...}));
                    using type = polyfill::bool_constant<value>;
                };

                template<class Pack, class ProjectQ = identity>
                using fn = typename invoke_this_fn<Pack, ProjectQ>::type;
            };

            template<template<class...> class TraitFn>
            using contains_fn = contains<quote_fn<TraitFn>>;
        }
    }

    namespace mpl = internal::mpl;

    // convenience quoted metafunctions
    namespace internal {
        /*
         *  Quoted trait metafunction that checks if a type has the specified trait.
         */
        template<template<class...> class TraitFn, class... Bound>
        using check_if =
            mpl::conditional_t<sizeof...(Bound) == 0, mpl::quote_fn<TraitFn>, mpl::bind_front_fn<TraitFn, Bound...>>;

        /*
         *  Quoted trait metafunction that checks if a type doesn't have the specified trait.
         */
        template<template<class...> class TraitFn>
        using check_if_not = mpl::not_fn<TraitFn>;

        /*
         *  Quoted trait metafunction that checks if a type is the same as the specified type.
         *  Commonly used named abbreviation for `check_if<std::is_same, Type>`.
         */
        template<class Type>
        using check_if_is_type = mpl::bind_front_fn<std::is_same, Type>;

        /*
         *  Quoted trait metafunction that checks if a type's template matches the specified template
         *  (similar to `is_specialization_of`).
         */
        template<template<class...> class Template>
        using check_if_is_template =
            mpl::pass_extracted_fn_to<mpl::bind_front_fn<std::is_same, mpl::quote_fn<Template>>>;

        /*
         *  Quoted metafunction that finds the index of the given type in a tuple.
         */
        template<class Type>
        using finds_if_has_type = mpl::finds<check_if_is_type<Type>>;

        /*
         *  Quoted metafunction that finds the index of the given class template in a tuple.
         */
        template<template<class...> class Template>
        using finds_if_has_template = mpl::finds<check_if_is_template<Template>>;

        /*
         *  Quoted trait metafunction that counts tuple elements having a given trait.
         */
        template<template<class...> class TraitFn>
        using counts_if_has = mpl::counts_fn<TraitFn>;

        /*
         *  Quoted trait metafunction that checks whether a tuple contains a type with given trait.
         */
        template<template<class...> class TraitFn>
        using check_if_has = mpl::contains_fn<TraitFn>;

        /*
         *  Quoted trait metafunction that checks whether a tuple doesn't contain a type with given trait.
         */
        template<template<class...> class TraitFn>
        using check_if_has_not = mpl::not_<mpl::contains_fn<TraitFn>>;

        /*
         *  Quoted metafunction that checks whether a tuple contains given type.
         */
        template<class T>
        using check_if_has_type = mpl::contains<check_if_is_type<T>>;

        /*
         *  Quoted metafunction that checks whether a tuple contains a given template.
         *
         *  Note: we are using 2 small tricks:
         *  1. A template template parameter can be treated like a metafunction, so we can just "quote" a 'primary'
         *     template into the MPL system (e.g. `std::vector`).
         *  2. This quoted metafunction does the opposite of the trait metafunction `is_specialization`:
         *     `is_specialization` tries to instantiate the primary template template parameter using the
         *     template parameters of a template type, then compares both instantiated types.
         *     Here instead, `pass_extracted_fn_to` extracts the template template parameter from a template type,
         *     then compares the resulting template template parameters.
         */
        template<template<class...> class Template>
        using check_if_has_template = mpl::contains<check_if_is_template<Template>>;
    }
}

// #include "tuple_helper/same_or_void.h"

#include <type_traits>  //  std::common_type

namespace sqlite_orm {
    namespace internal {

        /**
         *  Accepts any number of arguments and evaluates a nested `type` typename as `T` if all arguments are the same, otherwise `void`.
         */
        template<class... Args>
        struct same_or_void {
            using type = void;
        };

        template<class A>
        struct same_or_void<A> {
            using type = A;
        };

        template<class A>
        struct same_or_void<A, A> {
            using type = A;
        };

        template<class... Args>
        using same_or_void_t = typename same_or_void<Args...>::type;

        template<class A, class... Args>
        struct same_or_void<A, A, Args...> : same_or_void<A, Args...> {};

        template<class Pack>
        struct common_type_of;

        template<template<class...> class Pack, class... Types>
        struct common_type_of<Pack<Types...>> : std::common_type<Types...> {};

        /**
         *  Accepts a pack of types and defines a nested `type` typename to a common type if possible, otherwise nonexistent.
         *  
         *  @note: SFINAE friendly like `std::common_type`.
         */
        template<class Pack>
        using common_type_of_t = typename common_type_of<Pack>::type;
    }
}

// #include "tuple_helper/tuple_traits.h"

// #include "../functional/cxx_type_traits_polyfill.h"

// #include "../functional/mpl.h"

namespace sqlite_orm {
    // convenience metafunction algorithms
    namespace internal {
        /*
         *  Higher-order trait metafunction that checks whether a tuple contains a type with given trait (possibly projected).
         *  
         *  `ProjOp` is a metafunction
         */
        template<class Pack,
                 template<class...>
                 class TraitFn,
                 template<class...> class ProjOp = polyfill::type_identity_t>
        using tuple_has = mpl::invoke_t<check_if_has<TraitFn>, Pack, mpl::quote_fn<ProjOp>>;

        /*
         *  Higher-order trait metafunction that checks whether a tuple contains the specified type (possibly projected).
         *  
         *  `ProjOp` is a metafunction
         */
        template<class Pack, class Type, template<class...> class ProjOp = polyfill::type_identity_t>
        using tuple_has_type = mpl::invoke_t<check_if_has_type<Type>, Pack, mpl::quote_fn<ProjOp>>;

        /*
         *  Higher-order trait metafunction that checks whether a tuple contains the specified class template (possibly projected).
         *  
         *  `ProjOp` is a metafunction
         */
        template<class Pack,
                 template<class...>
                 class Template,
                 template<class...> class ProjOp = polyfill::type_identity_t>
        using tuple_has_template = mpl::invoke_t<check_if_has_template<Template>, Pack, mpl::quote_fn<ProjOp>>;

        /*
         *  Higher-order metafunction returning the first index constant of the desired type in a tuple (possibly projected).
         */
        template<class Pack, class Type, template<class...> class ProjOp = polyfill::type_identity_t>
        using find_tuple_type = mpl::invoke_t<finds_if_has_type<Type>, Pack, mpl::quote_fn<ProjOp>>;

        /*
         *  Higher-order metafunction returning the first index constant of the desired class template in a tuple (possibly projected).
         *  
         *  `ProjOp` is a metafunction
         */
        template<class Pack,
                 template<class...>
                 class Template,
                 template<class...> class ProjOp = polyfill::type_identity_t>
        using find_tuple_template = mpl::invoke_t<finds_if_has_template<Template>, Pack, mpl::quote_fn<ProjOp>>;

        /*
         *  Higher-order trait metafunction that counts the types having the specified trait in a tuple (possibly projected).
         *  
         *  `Pred` is a predicate metafunction with a nested bool member named `value`
         *  `ProjOp` is a metafunction
         */
        template<class Pack, template<class...> class Pred, template<class...> class ProjOp = polyfill::type_identity_t>
        using count_tuple = mpl::invoke_t<counts_if_has<Pred>, Pack, mpl::quote_fn<ProjOp>>;
    }
}

// #include "tuple_helper/tuple_filter.h"

#include <type_traits>  //  std::integral_constant, std::index_sequence, std::conditional, std::declval
#include <tuple>  //  std::tuple

// #include "../functional/cxx_universal.h"
//  ::size_t
// #include "../functional/mpl/conditional.h"

// #include "../functional/index_sequence_util.h"

#include <utility>  //  std::index_sequence

// #include "../functional/cxx_universal.h"
//  ::size_t

namespace sqlite_orm {
    namespace internal {
#if defined(SQLITE_ORM_PACK_INDEXING_SUPPORTED)
        /**
         *  Get the index value of an `index_sequence` at a specific position.
         */
        template<size_t Pos, size_t... Idx>
        SQLITE_ORM_CONSTEVAL size_t index_sequence_value_at(std::index_sequence<Idx...>) {
            return Idx...[Pos];
        }
#elif defined(SQLITE_ORM_FOLD_EXPRESSIONS_SUPPORTED)
        /**
         *  Get the index value of an `index_sequence` at a specific position.
         */
        template<size_t Pos, size_t... Idx>
        SQLITE_ORM_CONSTEVAL size_t index_sequence_value_at(std::index_sequence<Idx...>) {
            static_assert(Pos < sizeof...(Idx));
#ifdef SQLITE_ORM_CONSTEVAL_SUPPORTED
            size_t result;
#else
            size_t result = 0;
#endif
            size_t i = 0;
            // note: `(void)` cast silences warning 'expression result unused'
            (void)((result = Idx, i++ == Pos) || ...);
            return result;
        }
#else
        /**
         *  Get the index value of an `index_sequence` at a specific position.
         *  `Pos` must always be `0`.
         */
        template<size_t Pos, size_t I, size_t... Idx>
        SQLITE_ORM_CONSTEVAL size_t index_sequence_value_at(std::index_sequence<I, Idx...>) {
            static_assert(Pos == 0, "");
            return I;
        }
#endif

        template<class... Seq>
        struct flatten_idxseq {
            using type = std::index_sequence<>;
        };

        template<size_t... Ix>
        struct flatten_idxseq<std::index_sequence<Ix...>> {
            using type = std::index_sequence<Ix...>;
        };

        template<size_t... As, size_t... Bs, class... Seq>
        struct flatten_idxseq<std::index_sequence<As...>, std::index_sequence<Bs...>, Seq...>
            : flatten_idxseq<std::index_sequence<As..., Bs...>, Seq...> {};

        template<class... Seq>
        using flatten_idxseq_t = typename flatten_idxseq<Seq...>::type;
    }
}

namespace sqlite_orm {
    namespace internal {

        template<typename... input_t>
        using tuple_cat_t = decltype(std::tuple_cat(std::declval<input_t>()...));

        template<class... Tpl>
        struct conc_tuple {
            using type = tuple_cat_t<Tpl...>;
        };

        template<class Tpl, class Seq>
        struct tuple_from_index_sequence;

        template<class Tpl, size_t... Idx>
        struct tuple_from_index_sequence<Tpl, std::index_sequence<Idx...>> {
            using type = std::tuple<std::tuple_element_t<Idx, Tpl>...>;
        };

        template<class Tpl, class Seq>
        using tuple_from_index_sequence_t = typename tuple_from_index_sequence<Tpl, Seq>::type;

        template<class Tpl, template<class...> class Pred, template<class...> class Proj, class Seq>
        struct filter_tuple_sequence;

#ifndef SQLITE_ORM_BROKEN_VARIADIC_PACK_EXPANSION
        template<class Tpl, template<class...> class Pred, template<class...> class Proj, size_t... Idx>
        struct filter_tuple_sequence<Tpl, Pred, Proj, std::index_sequence<Idx...>>
            : flatten_idxseq<mpl::conditional_t<Pred<mpl::invoke_fn_t<Proj, std::tuple_element_t<Idx, Tpl>>>::value,
                                                std::index_sequence<Idx>,
                                                std::index_sequence<>>...> {};
#else
        template<size_t Idx, class T, template<class...> class Pred, class SFINAE = void>
        struct tuple_seq_single {
            using type = std::index_sequence<>;
        };

        template<size_t Idx, class T, template<class...> class Pred>
        struct tuple_seq_single<Idx, T, Pred, std::enable_if_t<Pred<T>::value>> {
            using type = std::index_sequence<Idx>;
        };

        template<class Tpl, template<class...> class Pred, template<class...> class Proj, size_t... Idx>
        struct filter_tuple_sequence<Tpl, Pred, Proj, std::index_sequence<Idx...>>
            : flatten_idxseq<typename tuple_seq_single<Idx,
                                                       mpl::invoke_fn_t<Proj, std::tuple_element_t<Idx, Tpl>>,
                                                       Pred>::type...> {};
#endif

        /*
         *  `Pred` is a metafunction that defines a bool member named `value`
         *  `FilterProj` is a metafunction
         */
        template<class Tpl,
                 template<class...>
                 class Pred,
                 template<class...> class FilterProj = polyfill::type_identity_t,
                 class Seq = std::make_index_sequence<std::tuple_size<Tpl>::value>>
        using filter_tuple_sequence_t = typename filter_tuple_sequence<Tpl, Pred, FilterProj, Seq>::type;

        /*
         *  `Pred` is a metafunction that defines a bool member named `value`
         *  `FilterProj` is a metafunction
         */
        template<class Tpl,
                 template<class...>
                 class Pred,
                 template<class...> class FilterProj = polyfill::type_identity_t,
                 class Seq = std::make_index_sequence<std::tuple_size<Tpl>::value>>
        using filter_tuple_t = tuple_from_index_sequence_t<Tpl, filter_tuple_sequence_t<Tpl, Pred, FilterProj, Seq>>;

        /*
         *  Count a tuple, picking only those elements specified in the index sequence.
         *  
         *  `Pred` is a metafunction that defines a bool member named `value`
         *  `FilterProj` is a metafunction
         *  
         *  Implementation note: must be distinct from a `count_tuple` w/o index sequence parameter because legacy compilers have problems
         *  with a default Sequence in function template parameters [SQLITE_ORM_BROKEN_VARIADIC_PACK_EXPANSION].
         */
        template<class Tpl,
                 template<class...>
                 class Pred,
                 class Seq,
                 template<class...> class FilterProj = polyfill::type_identity_t>
        struct count_filtered_tuple
            : std::integral_constant<size_t, filter_tuple_sequence_t<Tpl, Pred, FilterProj, Seq>::size()> {};
    }
}

// #include "type_traits.h"

// #include "collate_argument.h"

// #include "error_code.h"

#include "sqlite3.h"
#include <system_error>  // std::error_code, std::system_error
#include <string>  //  std::string
#include <stdexcept>
#include <sstream>  //  std::ostringstream
#include <type_traits>

namespace sqlite_orm {

    /** @short Enables classifying sqlite error codes.

        @note We don't bother listing all possible values;
        this also allows for compatibility with
        'Construction rules for enum class values (P0138R2)'
     */
    enum class sqlite_errc {};

    enum class orm_error_code {
        not_found = 1,
        type_is_not_mapped_to_storage,
        trying_to_dereference_null_iterator,
        too_many_tables_specified,
        incorrect_set_fields_specified,
        column_not_found,
        table_has_no_primary_key_column,
        cannot_start_a_transaction_within_a_transaction,
        no_active_transaction,
        incorrect_journal_mode_string,
        invalid_collate_argument_enum,
        failed_to_init_a_backup,
        unknown_member_value,
        incorrect_order,
        cannot_use_default_value,
        arguments_count_does_not_match,
        function_not_found,
        index_is_out_of_bounds,
        value_is_null,
        no_tables_specified,
    };

}

namespace std {
    template<>
    struct is_error_code_enum<::sqlite_orm::sqlite_errc> : true_type {};

    template<>
    struct is_error_code_enum<::sqlite_orm::orm_error_code> : true_type {};
}

namespace sqlite_orm {

    class orm_error_category : public std::error_category {
      public:
        const char* name() const noexcept override final {
            return "ORM error";
        }

        std::string message(int c) const override final {
            switch(static_cast<orm_error_code>(c)) {
                case orm_error_code::not_found:
                    return "Not found";
                case orm_error_code::type_is_not_mapped_to_storage:
                    return "Type is not mapped to storage";
                case orm_error_code::trying_to_dereference_null_iterator:
                    return "Trying to dereference null iterator";
                case orm_error_code::too_many_tables_specified:
                    return "Too many tables specified";
                case orm_error_code::incorrect_set_fields_specified:
                    return "Incorrect set fields specified";
                case orm_error_code::column_not_found:
                    return "Column not found";
                case orm_error_code::table_has_no_primary_key_column:
                    return "Table has no primary key column";
                case orm_error_code::cannot_start_a_transaction_within_a_transaction:
                    return "Cannot start a transaction within a transaction";
                case orm_error_code::no_active_transaction:
                    return "No active transaction";
                case orm_error_code::invalid_collate_argument_enum:
                    return "Invalid collate_argument enum";
                case orm_error_code::failed_to_init_a_backup:
                    return "Failed to init a backup";
                case orm_error_code::unknown_member_value:
                    return "Unknown member value";
                case orm_error_code::incorrect_order:
                    return "Incorrect order";
                case orm_error_code::cannot_use_default_value:
                    return "The statement 'INSERT INTO * DEFAULT VALUES' can be used with only one row";
                case orm_error_code::arguments_count_does_not_match:
                    return "Arguments count does not match";
                case orm_error_code::function_not_found:
                    return "Function not found";
                case orm_error_code::index_is_out_of_bounds:
                    return "Index is out of bounds";
                case orm_error_code::value_is_null:
                    return "Value is null";
                case orm_error_code::no_tables_specified:
                    return "No tables specified";
                default:
                    return "unknown error";
            }
        }
    };

    class sqlite_error_category : public std::error_category {
      public:
        const char* name() const noexcept override final {
            return "SQLite error";
        }

        std::string message(int c) const override final {
            return sqlite3_errstr(c);
        }
    };

    inline const orm_error_category& get_orm_error_category() {
        static orm_error_category res;
        return res;
    }

    inline const sqlite_error_category& get_sqlite_error_category() {
        static sqlite_error_category res;
        return res;
    }

    inline std::error_code make_error_code(sqlite_errc ev) noexcept {
        return {static_cast<int>(ev), get_sqlite_error_category()};
    }

    inline std::error_code make_error_code(orm_error_code ev) noexcept {
        return {static_cast<int>(ev), get_orm_error_category()};
    }

    template<typename... T>
    std::string get_error_message(sqlite3* db, T&&... args) {
        std::ostringstream stream;
        using unpack = int[];
        (void)unpack{0, (stream << args, 0)...};
        stream << sqlite3_errmsg(db);
        return stream.str();
    }

    template<typename... T>
    [[noreturn]] void throw_error(sqlite3* db, T&&... args) {
        throw std::system_error{sqlite_errc(sqlite3_errcode(db)), get_error_message(db, std::forward<T>(args)...)};
    }

    inline std::system_error sqlite_to_system_error(int ev) {
        return {sqlite_errc(ev)};
    }

    inline std::system_error sqlite_to_system_error(sqlite3* db) {
        return {sqlite_errc(sqlite3_errcode(db)), sqlite3_errmsg(db)};
    }

    [[noreturn]] inline void throw_translated_sqlite_error(int ev) {
        throw sqlite_to_system_error(ev);
    }

    [[noreturn]] inline void throw_translated_sqlite_error(sqlite3* db) {
        throw sqlite_to_system_error(db);
    }

    [[noreturn]] inline void throw_translated_sqlite_error(sqlite3_stmt* stmt) {
        throw sqlite_to_system_error(sqlite3_db_handle(stmt));
    }
}

// #include "table_type_of.h"

#include <type_traits>  //  std::enable_if, std::is_convertible

namespace sqlite_orm {

    namespace internal {

        template<class T, class F>
        struct column_pointer;

        template<class C>
        struct indexed_column_t;

        /**
         *  Trait class used to define table mapped type by setter/getter/member
         *  T - member pointer
         *  `type` is a type which is mapped.
         *  E.g.
         *  -   `table_type_of<decltype(&User::id)>::type` is `User`
         *  -   `table_type_of<decltype(&User::getName)>::type` is `User`
         *  -   `table_type_of<decltype(&User::setName)>::type` is `User`
         *  -   `table_type_of<decltype(column<User>(&User::id))>::type` is `User`
         *  -   `table_type_of<decltype(derived->*&User::id)>::type` is `User`
         */
        template<class T>
        struct table_type_of;

        template<class O, class F>
        struct table_type_of<F O::*> {
            using type = O;
        };

        template<class T, class F>
        struct table_type_of<column_pointer<T, F>> {
            using type = T;
        };

        template<class C>
        struct table_type_of<indexed_column_t<C>> : table_type_of<C> {};

        template<class T>
        using table_type_of_t = typename table_type_of<T>::type;

        /*
         *  This trait can be used to check whether the object type of a member pointer or column pointer matches the target type.
         *  
         *  One use case is the ability to create column reference to an aliased table column of a derived object field without explicitly using a column pointer.
         *  E.g.
         *  regular: `alias_column<alias_d<Derived>>(column<Derived>(&Base::field))`
         *  short:   `alias_column<alias_d<Derived>>(&Base::field)`
         */
        template<class F, class T, class SFINAE = void>
        SQLITE_ORM_INLINE_VAR constexpr bool is_field_of_v = false;

        /*
         *  `true` if a pointer-to-member of Base is convertible to a pointer-to-member of Derived.
         */
        template<class O, class Base, class F>
        SQLITE_ORM_INLINE_VAR constexpr bool
            is_field_of_v<F Base::*, O, std::enable_if_t<std::is_convertible<F Base::*, F O::*>::value>> = true;

        template<class F, class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_field_of_v<column_pointer<T, F>, T, void> = true;
    }
}

// #include "type_printer.h"

#include <string>  //  std::string
#include <memory>  //  std::shared_ptr, std::unique_ptr
#include <vector>  //  std::vector
// #include "functional/cxx_optional.h"

// #include "cxx_core_features.h"

#if SQLITE_ORM_HAS_INCLUDE(<optional>)
#include <optional>
#endif

#if __cpp_lib_optional >= 201606L
#define SQLITE_ORM_OPTIONAL_SUPPORTED
#endif

// #include "functional/cxx_type_traits_polyfill.h"

// #include "type_traits.h"

// #include "is_std_ptr.h"

#include <type_traits>
#include <memory>

namespace sqlite_orm {

    /**
     *  Specialization for optional type (std::shared_ptr / std::unique_ptr).
     */
    template<typename T>
    struct is_std_ptr : std::false_type {};

    template<typename T>
    struct is_std_ptr<std::shared_ptr<T>> : std::true_type {
        using element_type = typename std::shared_ptr<T>::element_type;

        static std::shared_ptr<T> make(std::remove_cv_t<T>&& v) {
            return std::make_shared<T>(std::move(v));
        }
    };

    template<typename T>
    struct is_std_ptr<std::unique_ptr<T>> : std::true_type {
        using element_type = typename std::unique_ptr<T>::element_type;

        static auto make(std::remove_cv_t<T>&& v) {
            return std::make_unique<T>(std::move(v));
        }
    };
}

namespace sqlite_orm {

    /**
     *  This class transforms a C++ type to a sqlite type name (int -> INTEGER, ...)
     */
    template<class T, typename Enable = void>
    struct type_printer {};

    struct integer_printer {
        const std::string& print() const {
            static const std::string res = "INTEGER";
            return res;
        }
    };

    struct text_printer {
        const std::string& print() const {
            static const std::string res = "TEXT";
            return res;
        }
    };

    struct real_printer {
        const std::string& print() const {
            static const std::string res = "REAL";
            return res;
        }
    };

    struct blob_printer {
        const std::string& print() const {
            static const std::string res = "BLOB";
            return res;
        }
    };

    // Note: char, unsigned/signed char are used for storing integer values, not char values.
    template<class T>
    struct type_printer<T,
                        std::enable_if_t<polyfill::conjunction<polyfill::negation<internal::is_any_of<T,
                                                                                                      wchar_t,
#ifdef SQLITE_ORM_CHAR8T_SUPPORTED
                                                                                                      char8_t,
#endif
                                                                                                      char16_t,
                                                                                                      char32_t>>,
                                                               std::is_integral<T>>::value>> : integer_printer {
    };

    template<class T>
    struct type_printer<T, std::enable_if_t<std::is_floating_point<T>::value>> : real_printer {};

    template<class T>
    struct type_printer<T,
                        std::enable_if_t<polyfill::disjunction<std::is_same<T, const char*>,
                                                               std::is_base_of<std::string, T>,
                                                               std::is_base_of<std::wstring, T>>::value>>
        : text_printer {};

    template<class T>
    struct type_printer<T, std::enable_if_t<is_std_ptr<T>::value>> : type_printer<typename T::element_type> {};

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
    template<class T>
    struct type_printer<T, std::enable_if_t<polyfill::is_specialization_of_v<T, std::optional>>>
        : type_printer<typename T::value_type> {};
#endif

    template<>
    struct type_printer<std::vector<char>, void> : blob_printer {};
}

namespace sqlite_orm {

    namespace internal {

        enum class conflict_clause_t {
            rollback,
            abort,
            fail,
            ignore,
            replace,
        };

        struct primary_key_base {
            enum class order_by {
                unspecified,
                ascending,
                descending,
            };
            struct {
                order_by asc_option = order_by::unspecified;
                conflict_clause_t conflict_clause = conflict_clause_t::rollback;
                bool conflict_clause_is_on = false;
            } options;
        };

        template<class T>
        struct primary_key_with_autoincrement : T {
            using primary_key_type = T;

            const primary_key_type& as_base() const {
                return *this;
            }
#ifndef SQLITE_ORM_AGGREGATE_BASES_SUPPORTED
            primary_key_with_autoincrement(primary_key_type primary_key) : primary_key_type{primary_key} {}
#endif
        };

        /**
         *  PRIMARY KEY constraint class.
         *  Cs is parameter pack which contains columns (member pointers and/or function pointers). Can be empty when
         *  used within `make_column` function.
         */
        template<class... Cs>
        struct primary_key_t : primary_key_base {
            using self = primary_key_t<Cs...>;
            using order_by = primary_key_base::order_by;
            using columns_tuple = std::tuple<Cs...>;

            columns_tuple columns;

            primary_key_t(columns_tuple columns) : columns(std::move(columns)) {}

            self asc() const {
                auto res = *this;
                res.options.asc_option = order_by::ascending;
                return res;
            }

            self desc() const {
                auto res = *this;
                res.options.asc_option = order_by::descending;
                return res;
            }

            primary_key_with_autoincrement<self> autoincrement() const {
                return {*this};
            }

            self on_conflict_rollback() const {
                auto res = *this;
                res.options.conflict_clause_is_on = true;
                res.options.conflict_clause = conflict_clause_t::rollback;
                return res;
            }

            self on_conflict_abort() const {
                auto res = *this;
                res.options.conflict_clause_is_on = true;
                res.options.conflict_clause = conflict_clause_t::abort;
                return res;
            }

            self on_conflict_fail() const {
                auto res = *this;
                res.options.conflict_clause_is_on = true;
                res.options.conflict_clause = conflict_clause_t::fail;
                return res;
            }

            self on_conflict_ignore() const {
                auto res = *this;
                res.options.conflict_clause_is_on = true;
                res.options.conflict_clause = conflict_clause_t::ignore;
                return res;
            }

            self on_conflict_replace() const {
                auto res = *this;
                res.options.conflict_clause_is_on = true;
                res.options.conflict_clause = conflict_clause_t::replace;
                return res;
            }
        };

        struct unique_base {
            operator std::string() const {
                return "UNIQUE";
            }
        };

        /**
         *  UNIQUE constraint class.
         */
        template<class... Args>
        struct unique_t : unique_base {
            using columns_tuple = std::tuple<Args...>;

            columns_tuple columns;

            unique_t(columns_tuple columns_) : columns(std::move(columns_)) {}
        };

        struct unindexed_t {};

        template<class T>
        struct prefix_t {
            using value_type = T;

            value_type value;
        };

        template<class T>
        struct tokenize_t {
            using value_type = T;

            value_type value;
        };

        template<class T>
        struct content_t {
            using value_type = T;

            value_type value;
        };

        template<class T>
        struct table_content_t {
            using mapped_type = T;
        };

        /**
         *  DEFAULT constraint class.
         *  T is a value type.
         */
        template<class T>
        struct default_t {
            using value_type = T;

            value_type value;

            operator std::string() const {
                return "DEFAULT";
            }
        };

#if SQLITE_VERSION_NUMBER >= 3006019
        /**
         *  FOREIGN KEY constraint class.
         *  Cs are columns which has foreign key
         *  Rs are column which C references to
         *  Available in SQLite 3.6.19 or higher
         */

        template<class A, class B>
        struct foreign_key_t;

        enum class foreign_key_action {
            none,  //  not specified
            no_action,
            restrict_,
            set_null,
            set_default,
            cascade,
        };

        inline std::ostream& operator<<(std::ostream& os, foreign_key_action action) {
            switch(action) {
                case foreign_key_action::no_action:
                    os << "NO ACTION";
                    break;
                case foreign_key_action::restrict_:
                    os << "RESTRICT";
                    break;
                case foreign_key_action::set_null:
                    os << "SET NULL";
                    break;
                case foreign_key_action::set_default:
                    os << "SET DEFAULT";
                    break;
                case foreign_key_action::cascade:
                    os << "CASCADE";
                    break;
                case foreign_key_action::none:
                    break;
            }
            return os;
        }

        struct on_update_delete_base {
            const bool update;  //  true if update and false if delete

            operator std::string() const {
                if(this->update) {
                    return "ON UPDATE";
                } else {
                    return "ON DELETE";
                }
            }
        };

        /**
         *  F - foreign key class
         */
        template<class F>
        struct on_update_delete_t : on_update_delete_base {
            using foreign_key_type = F;

            const foreign_key_type& fk;

            on_update_delete_t(decltype(fk) fk_, decltype(update) update_, foreign_key_action action_) :
                on_update_delete_base{update_}, fk(fk_), _action(action_) {}

            foreign_key_action _action = foreign_key_action::none;

            foreign_key_type no_action() const {
                auto res = this->fk;
                if(update) {
                    res.on_update._action = foreign_key_action::no_action;
                } else {
                    res.on_delete._action = foreign_key_action::no_action;
                }
                return res;
            }

            foreign_key_type restrict_() const {
                auto res = this->fk;
                if(update) {
                    res.on_update._action = foreign_key_action::restrict_;
                } else {
                    res.on_delete._action = foreign_key_action::restrict_;
                }
                return res;
            }

            foreign_key_type set_null() const {
                auto res = this->fk;
                if(update) {
                    res.on_update._action = foreign_key_action::set_null;
                } else {
                    res.on_delete._action = foreign_key_action::set_null;
                }
                return res;
            }

            foreign_key_type set_default() const {
                auto res = this->fk;
                if(update) {
                    res.on_update._action = foreign_key_action::set_default;
                } else {
                    res.on_delete._action = foreign_key_action::set_default;
                }
                return res;
            }

            foreign_key_type cascade() const {
                auto res = this->fk;
                if(update) {
                    res.on_update._action = foreign_key_action::cascade;
                } else {
                    res.on_delete._action = foreign_key_action::cascade;
                }
                return res;
            }

            operator bool() const {
                return this->_action != foreign_key_action::none;
            }
        };

        template<class F>
        bool operator==(const on_update_delete_t<F>& lhs, const on_update_delete_t<F>& rhs) {
            return lhs._action == rhs._action;
        }

        template<class... Cs, class... Rs>
        struct foreign_key_t<std::tuple<Cs...>, std::tuple<Rs...>> {
            using columns_type = std::tuple<Cs...>;
            using references_type = std::tuple<Rs...>;
            using self = foreign_key_t<columns_type, references_type>;

            /**
             * Holds obect type of all referenced columns.
             */
            using target_type = same_or_void_t<table_type_of_t<Rs>...>;

            /**
             * Holds obect type of all source columns.
             */
            using source_type = same_or_void_t<table_type_of_t<Cs>...>;

            columns_type columns;
            references_type references;

            on_update_delete_t<self> on_update;
            on_update_delete_t<self> on_delete;

            static_assert(std::tuple_size<columns_type>::value == std::tuple_size<references_type>::value,
                          "Columns size must be equal to references tuple");
            static_assert(!std::is_same<target_type, void>::value, "All references must have the same type");

            foreign_key_t(columns_type columns_, references_type references_) :
                columns(std::move(columns_)), references(std::move(references_)),
                on_update(*this, true, foreign_key_action::none), on_delete(*this, false, foreign_key_action::none) {}

            foreign_key_t(const self& other) :
                columns(other.columns), references(other.references), on_update(*this, true, other.on_update._action),
                on_delete(*this, false, other.on_delete._action) {}

            self& operator=(const self& other) {
                this->columns = other.columns;
                this->references = other.references;
                this->on_update = {*this, true, other.on_update._action};
                this->on_delete = {*this, false, other.on_delete._action};
                return *this;
            }
        };

        template<class A, class B>
        bool operator==(const foreign_key_t<A, B>& lhs, const foreign_key_t<A, B>& rhs) {
            return lhs.columns == rhs.columns && lhs.references == rhs.references && lhs.on_update == rhs.on_update &&
                   lhs.on_delete == rhs.on_delete;
        }

        /**
         *  Cs can be a class member pointer, a getter function member pointer or setter
         *  func member pointer
         *  Available in SQLite 3.6.19 or higher
         */
        template<class... Cs>
        struct foreign_key_intermediate_t {
            using tuple_type = std::tuple<Cs...>;

            tuple_type columns;

            template<class... Rs>
            foreign_key_t<std::tuple<Cs...>, std::tuple<Rs...>> references(Rs... refs) {
                return {std::move(this->columns), {std::forward<Rs>(refs)...}};
            }
        };
#endif

        struct collate_constraint_t {
            collate_argument argument = collate_argument::binary;
#ifndef SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
            collate_constraint_t(collate_argument argument) : argument{argument} {}
#endif

            operator std::string() const {
                return "COLLATE " + this->string_from_collate_argument(this->argument);
            }

            static std::string string_from_collate_argument(collate_argument argument) {
                switch(argument) {
                    case collate_argument::binary:
                        return "BINARY";
                    case collate_argument::nocase:
                        return "NOCASE";
                    case collate_argument::rtrim:
                        return "RTRIM";
                }
                throw std::system_error{orm_error_code::invalid_collate_argument_enum};
            }
        };

        template<class T>
        struct check_t {
            using expression_type = T;

            expression_type expression;
        };

        struct basic_generated_always {
            enum class storage_type {
                not_specified,
                virtual_,
                stored,
            };

#if SQLITE_VERSION_NUMBER >= 3031000
            bool full = true;
            storage_type storage = storage_type::not_specified;
#endif

#ifndef SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
            basic_generated_always(bool full, storage_type storage) : full{full}, storage{storage} {}
#endif
        };

#if SQLITE_VERSION_NUMBER >= 3031000
        template<class T>
        struct generated_always_t : basic_generated_always {
            using expression_type = T;

            expression_type expression;

            generated_always_t(expression_type expression_, bool full, storage_type storage) :
                basic_generated_always{full, storage}, expression(std::move(expression_)) {}

            generated_always_t<T> virtual_() {
                return {std::move(this->expression), this->full, storage_type::virtual_};
            }

            generated_always_t<T> stored() {
                return {std::move(this->expression), this->full, storage_type::stored};
            }
        };
#endif

        struct null_t {};

        struct not_null_t {};
    }

    namespace internal {

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_foreign_key_v =
#if SQLITE_VERSION_NUMBER >= 3006019
            polyfill::is_specialization_of<T, foreign_key_t>::value;
#else
            false;
#endif

        template<class T>
        struct is_foreign_key : polyfill::bool_constant<is_foreign_key_v<T>> {};

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_primary_key_v = std::is_base_of<primary_key_base, T>::value;

        template<class T>
        struct is_primary_key : polyfill::bool_constant<is_primary_key_v<T>> {};

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_generated_always_v =
#if SQLITE_VERSION_NUMBER >= 3031000
            polyfill::is_specialization_of<T, generated_always_t>::value;
#else
            false;
#endif

        template<class T>
        struct is_generated_always : polyfill::bool_constant<is_generated_always_v<T>> {};

        /**
         * PRIMARY KEY INSERTABLE traits.
         */
        template<typename Column>
        struct is_primary_key_insertable
            : polyfill::disjunction<
                  mpl::invoke_t<mpl::disjunction<check_if_has_template<primary_key_with_autoincrement>,
                                                 check_if_has_template<default_t>>,
                                constraints_type_t<Column>>,
                  std::is_base_of<integer_printer, type_printer<field_type_t<Column>>>> {

            static_assert(tuple_has<constraints_type_t<Column>, is_primary_key>::value,
                          "an unexpected type was passed");
        };

        template<class T>
        using is_column_constraint = mpl::invoke_t<mpl::disjunction<check_if<std::is_base_of, primary_key_t<>>,
                                                                    check_if_is_type<null_t>,
                                                                    check_if_is_type<not_null_t>,
                                                                    check_if_is_type<unique_t<>>,
                                                                    check_if_is_template<default_t>,
                                                                    check_if_is_template<check_t>,
                                                                    check_if_is_type<collate_constraint_t>,
                                                                    check_if<is_generated_always>,
                                                                    check_if_is_type<unindexed_t>>,
                                                   T>;
    }

#if SQLITE_VERSION_NUMBER >= 3031000
    template<class T>
    internal::generated_always_t<T> generated_always_as(T expression) {
        return {std::move(expression), true, internal::basic_generated_always::storage_type::not_specified};
    }

    template<class T>
    internal::generated_always_t<T> as(T expression) {
        return {std::move(expression), false, internal::basic_generated_always::storage_type::not_specified};
    }
#endif

#if SQLITE_VERSION_NUMBER >= 3006019
    /**
     *  FOREIGN KEY constraint construction function that takes member pointer as argument
     *  Available in SQLite 3.6.19 or higher
     */
    template<class... Cs>
    internal::foreign_key_intermediate_t<Cs...> foreign_key(Cs... columns) {
        return {{std::forward<Cs>(columns)...}};
    }
#endif

    /**
     *  UNIQUE table constraint builder function.
     */
    template<class... Args>
    internal::unique_t<Args...> unique(Args... args) {
        return {{std::forward<Args>(args)...}};
    }

    /**
     *  UNIQUE column constraint builder function.
     */
    inline internal::unique_t<> unique() {
        return {{}};
    }

#if SQLITE_VERSION_NUMBER >= 3009000
    /**
     *  UNINDEXED column constraint builder function. Used in FTS virtual tables.
     * 
     *  https://www.sqlite.org/fts5.html#the_unindexed_column_option
     */
    inline internal::unindexed_t unindexed() {
        return {};
    }

    /**
     *  prefix=N table constraint builder function. Used in FTS virtual tables.
     * 
     *  https://www.sqlite.org/fts5.html#prefix_indexes
     */
    template<class T>
    internal::prefix_t<T> prefix(T value) {
        return {std::move(value)};
    }

    /**
     *  tokenize='...'' table constraint builder function. Used in FTS virtual tables.
     * 
     *  https://www.sqlite.org/fts5.html#tokenizers
     */
    template<class T>
    internal::tokenize_t<T> tokenize(T value) {
        return {std::move(value)};
    }

    /**
     *  content='' table constraint builder function. Used in FTS virtual tables.
     * 
     *  https://www.sqlite.org/fts5.html#contentless_tables
     */
    template<class T>
    internal::content_t<T> content(T value) {
        return {std::move(value)};
    }

    /**
     *  content='table' table constraint builder function. Used in FTS virtual tables.
     * 
     *  https://www.sqlite.org/fts5.html#external_content_tables
     */
    template<class T>
    internal::table_content_t<T> content() {
        return {};
    }
#endif

    /**
     *  PRIMARY KEY table constraint builder function.
     */
    template<class... Cs>
    internal::primary_key_t<Cs...> primary_key(Cs... cs) {
        return {{std::forward<Cs>(cs)...}};
    }

    /**
     *  PRIMARY KEY column constraint builder function.
     */
    inline internal::primary_key_t<> primary_key() {
        return {{}};
    }

    template<class T>
    internal::default_t<T> default_value(T t) {
        return {std::move(t)};
    }

    inline internal::collate_constraint_t collate_nocase() {
        return {internal::collate_argument::nocase};
    }

    inline internal::collate_constraint_t collate_binary() {
        return {internal::collate_argument::binary};
    }

    inline internal::collate_constraint_t collate_rtrim() {
        return {internal::collate_argument::rtrim};
    }

    template<class T>
    internal::check_t<T> check(T t) {
        return {std::move(t)};
    }

    inline internal::null_t null() {
        return {};
    }

    inline internal::not_null_t not_null() {
        return {};
    }
}
#pragma once

#include <type_traits>  //  std::false_type, std::true_type, std::enable_if
#include <memory>  //  std::shared_ptr, std::unique_ptr
// #include "functional/cxx_optional.h"

// #include "functional/cxx_type_traits_polyfill.h"

namespace sqlite_orm {

    /**
     *  This is class that tells `sqlite_orm` that type is nullable. Nullable types
     *  are mapped to sqlite database as `NULL` and not-nullable are mapped as `NOT NULL`.
     *  Default nullability status for all types is `NOT NULL`. So if you want to map
     *  custom type as `NULL` (for example: boost::optional) you have to create a specialization
     *  of `type_is_nullable` for your type and derive from `std::true_type`.
     */
    template<class T, class SFINAE = void>
    struct type_is_nullable : std::false_type {
        bool operator()(const T&) const {
            return true;
        }
    };

    /**
     *  This is a specialization for std::shared_ptr, std::unique_ptr, std::optional, which are nullable in sqlite_orm.
     */
    template<class T>
    struct type_is_nullable<T,
                            std::enable_if_t<polyfill::disjunction<
#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
                                polyfill::is_specialization_of<T, std::optional>,
#endif
                                polyfill::is_specialization_of<T, std::unique_ptr>,
                                polyfill::is_specialization_of<T, std::shared_ptr>>::value>> : std::true_type {
        bool operator()(const T& t) const {
            return static_cast<bool>(t);
        }
    };
}
#pragma once

#include <type_traits>  //  std::false_type, std::true_type
#include <utility>  //  std::move

// #include "functional/cxx_type_traits_polyfill.h"

// #include "is_base_of_template.h"

#include <type_traits>  //  std::true_type, std::false_type, std::declval

namespace sqlite_orm {

    namespace internal {

        /*
         * This is because of bug in MSVC, for more information, please visit
         * https://stackoverflow.com/questions/34672441/stdis-base-of-for-template-classes/34672753#34672753
         */
#ifdef SQLITE_ORM_BROKEN_VARIADIC_PACK_EXPANSION
        template<template<typename...> class Base>
        struct is_base_of_template_impl {
            template<typename... Ts>
            static constexpr std::true_type test(const Base<Ts...>&);

            static constexpr std::false_type test(...);
        };

        template<typename T, template<typename...> class C>
        using is_base_of_template = decltype(is_base_of_template_impl<C>::test(std::declval<T>()));
#else
        template<template<typename...> class C, typename... Ts>
        std::true_type is_base_of_template_impl(const C<Ts...>&);

        template<template<typename...> class C>
        std::false_type is_base_of_template_impl(...);

        template<typename T, template<typename...> class C>
        using is_base_of_template = decltype(is_base_of_template_impl<C>(std::declval<T>()));
#endif

        template<typename T, template<typename...> class C>
        SQLITE_ORM_INLINE_VAR constexpr bool is_base_of_template_v = is_base_of_template<T, C>::value;
    }
}

// #include "tags.h"

// #include "functional/cxx_functional_polyfill.h"

#include <functional>
#if __cpp_lib_invoke < 201411L
#include <type_traits>  //  std::enable_if, std::is_member_object_pointer, std::is_member_function_pointer
#endif
#include <utility>  //  std::forward

// #include "cxx_type_traits_polyfill.h"

// #include "../member_traits/member_traits.h"

#include <type_traits>  //  std::enable_if, std::is_function, std::true_type, std::false_type

// #include "../functional/cxx_universal.h"

// #include "../functional/cxx_type_traits_polyfill.h"

namespace sqlite_orm {
    namespace internal {
        // SFINAE friendly trait to get a member object pointer's field type
        template<class T>
        struct object_field_type {};

        template<class T>
        using object_field_type_t = typename object_field_type<T>::type;

        template<class F, class O>
        struct object_field_type<F O::*> : std::enable_if<!std::is_function<F>::value, F> {};

        // SFINAE friendly trait to get a member function pointer's field type (i.e. unqualified return type)
        template<class T>
        struct getter_field_type {};

        template<class T>
        using getter_field_type_t = typename getter_field_type<T>::type;

        template<class T, class O>
        struct getter_field_type<T O::*> : getter_field_type<T> {};

        template<class F>
        struct getter_field_type<F(void) const> : polyfill::remove_cvref<F> {};

        template<class F>
        struct getter_field_type<F(void)> : polyfill::remove_cvref<F> {};

#ifdef SQLITE_ORM_NOTHROW_ALIASES_SUPPORTED
        template<class F>
        struct getter_field_type<F(void) const noexcept> : polyfill::remove_cvref<F> {};

        template<class F>
        struct getter_field_type<F(void) noexcept> : polyfill::remove_cvref<F> {};
#endif

        // SFINAE friendly trait to get a member function pointer's field type (i.e. unqualified parameter type)
        template<class T>
        struct setter_field_type {};

        template<class T>
        using setter_field_type_t = typename setter_field_type<T>::type;

        template<class T, class O>
        struct setter_field_type<T O::*> : setter_field_type<T> {};

        template<class F>
        struct setter_field_type<void(F)> : polyfill::remove_cvref<F> {};

#ifdef SQLITE_ORM_NOTHROW_ALIASES_SUPPORTED
        template<class F>
        struct setter_field_type<void(F) noexcept> : polyfill::remove_cvref<F> {};
#endif

        template<class T, class SFINAE = void>
        struct is_getter : std::false_type {};
        template<class T>
        struct is_getter<T, polyfill::void_t<getter_field_type_t<T>>> : std::true_type {};

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_getter_v = is_getter<T>::value;

        template<class T, class SFINAE = void>
        struct is_setter : std::false_type {};
        template<class T>
        struct is_setter<T, polyfill::void_t<setter_field_type_t<T>>> : std::true_type {};

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_setter_v = is_setter<T>::value;

        template<class T>
        struct member_field_type : object_field_type<T>, getter_field_type<T>, setter_field_type<T> {};

        template<class T>
        using member_field_type_t = typename member_field_type<T>::type;

        template<class T>
        struct member_object_type {};

        template<class F, class O>
        struct member_object_type<F O::*> : polyfill::type_identity<O> {};

        template<class T>
        using member_object_type_t = typename member_object_type<T>::type;
    }
}

namespace sqlite_orm {
    namespace internal {
        namespace polyfill {
            // C++20 or later (unfortunately there's no feature test macro).
            // Stupidly, clang says C++20, but `std::identity` was only implemented in libc++ 13 and libstd++-v3 10
            // (the latter is used on Linux).
            // gcc got it right and reports C++20 only starting with v10.
            // The check here doesn't care and checks the library versions in use.
            //
            // Another way of detection would be the constrained algorithms feature-test macro __cpp_lib_ranges
#if(__cplusplus >= 202002L) &&                                                                                         \
    ((!_LIBCPP_VERSION || _LIBCPP_VERSION >= 13000) && (!_GLIBCXX_RELEASE || _GLIBCXX_RELEASE >= 10))
            using std::identity;
#else
            struct identity {
                template<class T>
                constexpr T&& operator()(T&& v) const noexcept {
                    return std::forward<T>(v);
                }

                using is_transparent = int;
            };
#endif

#if __cpp_lib_invoke >= 201411L
            using std::invoke;
#else
            // pointer-to-data-member+object
            template<class Callable,
                     class Object,
                     class... Args,
                     class Unqualified = remove_cvref_t<Callable>,
                     std::enable_if_t<std::is_member_object_pointer<Unqualified>::value, bool> = true>
            decltype(auto) invoke(Callable&& callable, Object&& object, Args&&... args) {
                return std::forward<Object>(object).*callable;
            }

            // pointer-to-member-function+object
            template<class Callable,
                     class Object,
                     class... Args,
                     class Unqualified = remove_cvref_t<Callable>,
                     std::enable_if_t<std::is_member_function_pointer<Unqualified>::value, bool> = true>
            decltype(auto) invoke(Callable&& callable, Object&& object, Args&&... args) {
                return (std::forward<Object>(object).*callable)(std::forward<Args>(args)...);
            }

            // pointer-to-member+reference-wrapped object (expect `reference_wrapper::*`)
            template<class Callable,
                     class Object,
                     class... Args,
                     std::enable_if_t<polyfill::negation<polyfill::is_specialization_of<
                                          member_object_type_t<std::remove_reference_t<Callable>>,
                                          std::reference_wrapper>>::value,
                                      bool> = true>
            decltype(auto) invoke(Callable&& callable, std::reference_wrapper<Object> wrapper, Args&&... args) {
                return invoke(std::forward<Callable>(callable), wrapper.get(), std::forward<Args>(args)...);
            }

            // functor
            template<class Callable, class... Args>
            decltype(auto) invoke(Callable&& callable, Args&&... args) {
                return std::forward<Callable>(callable)(std::forward<Args>(args)...);
            }
#endif
        }
    }

    namespace polyfill = internal::polyfill;
}

namespace sqlite_orm {
    namespace internal {
        struct negatable_t {};

        /**
         *  Inherit from this class to support arithmetic types overloading
         */
        struct arithmetic_t {};

        /**
         *  Inherit from this class if target class can be chained with other conditions with '&&' and '||' operators
         */
        struct condition_t {};

        /**
         *  Specialize if a type participates as an argument to overloaded operators (arithmetic, conditional, negation, chaining)
         */
        template<class T, class SFINAE = void>
        SQLITE_ORM_INLINE_VAR constexpr bool is_operator_argument_v = false;

        template<class T>
        using is_operator_argument = polyfill::bool_constant<is_operator_argument_v<T>>;
    }
}

// #include "serialize_result_type.h"

// #include "functional/cxx_string_view.h"

// #include "cxx_core_features.h"

#if SQLITE_ORM_HAS_INCLUDE(<string_view>)
#include <string_view>
#endif

#if __cpp_lib_string_view >= 201606L
#define SQLITE_ORM_STRING_VIEW_SUPPORTED
#endif

#ifndef SQLITE_ORM_STRING_VIEW_SUPPORTED
#include <string>  //  std::string
#endif

namespace sqlite_orm {
    namespace internal {
#ifdef SQLITE_ORM_STRING_VIEW_SUPPORTED
        using serialize_result_type = std::string_view;
        using serialize_arg_type = std::string_view;
#else
        using serialize_result_type = std::string;
        using serialize_arg_type = const std::string&;
#endif
    }
}

namespace sqlite_orm {

    namespace internal {

        template<class L, class R, class... Ds>
        struct binary_operator : Ds... {
            using left_type = L;
            using right_type = R;

            left_type lhs;
            right_type rhs;

            binary_operator(left_type lhs_, right_type rhs_) : lhs(std::move(lhs_)), rhs(std::move(rhs_)) {}
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_binary_operator_v = is_base_of_template<T, binary_operator>::value;

        template<class T>
        using is_binary_operator = polyfill::bool_constant<is_binary_operator_v<T>>;

        struct conc_string {
            serialize_result_type serialize() const {
                return "||";
            }
        };

        /**
         *  Result of concatenation || operator
         */
        template<class L, class R>
        using conc_t = binary_operator<L, R, conc_string>;

        struct add_string {
            serialize_result_type serialize() const {
                return "+";
            }
        };

        /**
         *  Result of addition + operator
         */
        template<class L, class R>
        using add_t = binary_operator<L, R, add_string, arithmetic_t, negatable_t>;

        struct sub_string {
            serialize_result_type serialize() const {
                return "-";
            }
        };

        /**
         *  Result of substitute - operator
         */
        template<class L, class R>
        using sub_t = binary_operator<L, R, sub_string, arithmetic_t, negatable_t>;

        struct mul_string {
            serialize_result_type serialize() const {
                return "*";
            }
        };

        /**
         *  Result of multiply * operator
         */
        template<class L, class R>
        using mul_t = binary_operator<L, R, mul_string, arithmetic_t, negatable_t>;

        struct div_string {
            serialize_result_type serialize() const {
                return "/";
            }
        };

        /**
         *  Result of divide / operator
         */
        template<class L, class R>
        using div_t = binary_operator<L, R, div_string, arithmetic_t, negatable_t>;

        struct mod_operator_string {
            serialize_result_type serialize() const {
                return "%";
            }
        };

        /**
         *  Result of mod % operator
         */
        template<class L, class R>
        using mod_t = binary_operator<L, R, mod_operator_string, arithmetic_t, negatable_t>;

        struct bitwise_shift_left_string {
            serialize_result_type serialize() const {
                return "<<";
            }
        };

        /**
         * Result of bitwise shift left << operator
         */
        template<class L, class R>
        using bitwise_shift_left_t = binary_operator<L, R, bitwise_shift_left_string, arithmetic_t, negatable_t>;

        struct bitwise_shift_right_string {
            serialize_result_type serialize() const {
                return ">>";
            }
        };

        /**
         * Result of bitwise shift right >> operator
         */
        template<class L, class R>
        using bitwise_shift_right_t = binary_operator<L, R, bitwise_shift_right_string, arithmetic_t, negatable_t>;

        struct bitwise_and_string {
            serialize_result_type serialize() const {
                return "&";
            }
        };

        /**
         * Result of bitwise and & operator
         */
        template<class L, class R>
        using bitwise_and_t = binary_operator<L, R, bitwise_and_string, arithmetic_t, negatable_t>;

        struct bitwise_or_string {
            serialize_result_type serialize() const {
                return "|";
            }
        };

        /**
         * Result of bitwise or | operator
         */
        template<class L, class R>
        using bitwise_or_t = binary_operator<L, R, bitwise_or_string, arithmetic_t, negatable_t>;

        struct bitwise_not_string {
            serialize_result_type serialize() const {
                return "~";
            }
        };

        /**
         * Result of bitwise not ~ operator
         */
        template<class T>
        struct bitwise_not_t : bitwise_not_string, arithmetic_t, negatable_t {
            using argument_type = T;

            argument_type argument;

            bitwise_not_t(argument_type argument_) : argument(std::move(argument_)) {}
        };

        struct assign_string {
            serialize_result_type serialize() const {
                return "=";
            }
        };

        /**
         *  Result of assign = operator
         */
        template<class L, class R>
        using assign_t = binary_operator<L, R, assign_string>;

        /**
         *  Assign operator traits. Common case
         */
        template<class T>
        struct is_assign_t : public std::false_type {};

        /**
         *  Assign operator traits. Specialized case
         */
        template<class L, class R>
        struct is_assign_t<assign_t<L, R>> : public std::true_type {};
    }

    /**
     *  Public interface for || concatenation operator. Example: `select(conc(&User::name, "@gmail.com"));` => SELECT
     * name || '@gmail.com' FROM users
     */
    template<class L, class R>
    internal::conc_t<L, R> conc(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    /**
     *  Public interface for + operator. Example: `select(add(&User::age, 100));` => SELECT age + 100 FROM users
     */
    template<class L, class R>
    internal::add_t<L, R> add(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    /**
     *  Public interface for - operator. Example: `select(sub(&User::age, 1));` => SELECT age - 1 FROM users
     */
    template<class L, class R>
    internal::sub_t<L, R> sub(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    /**
     *  Public interface for * operator. Example: `select(mul(&User::salary, 2));` => SELECT salary * 2 FROM users
     */
    template<class L, class R>
    internal::mul_t<L, R> mul(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    /**
     *  Public interface for / operator. Example: `select(div(&User::salary, 3));` => SELECT salary / 3 FROM users
     *  @note Please notice that ::div function already exists in pure C standard library inside <cstdlib> header.
     *  If you use `using namespace sqlite_orm` directive you an specify which `div` you call explicitly using  `::div` or `sqlite_orm::div` statements.
     */
    template<class L, class R>
    internal::div_t<L, R> div(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    /**
     *  Public interface for % operator. Example: `select(mod(&User::age, 5));` => SELECT age % 5 FROM users
     */
    template<class L, class R>
    internal::mod_t<L, R> mod(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    template<class L, class R>
    internal::bitwise_shift_left_t<L, R> bitwise_shift_left(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    template<class L, class R>
    internal::bitwise_shift_right_t<L, R> bitwise_shift_right(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    template<class L, class R>
    internal::bitwise_and_t<L, R> bitwise_and(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    template<class L, class R>
    internal::bitwise_or_t<L, R> bitwise_or(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    template<class T>
    internal::bitwise_not_t<T> bitwise_not(T t) {
        return {std::move(t)};
    }

    template<class L, class R>
    internal::assign_t<L, R> assign(L l, R r) {
        return {std::move(l), std::move(r)};
    }

}
#pragma once

#include <tuple>  //  std::tuple
#include <string>  //  std::string
#include <memory>  //  std::unique_ptr
#include <type_traits>  //  std::is_same, std::is_member_object_pointer
#include <utility>  //  std::move

// #include "../functional/cxx_universal.h"

// #include "../functional/cxx_type_traits_polyfill.h"

// #include "../tuple_helper/tuple_traits.h"

// #include "../tuple_helper/tuple_filter.h"

// #include "../type_traits.h"

// #include "../member_traits/member_traits.h"

// #include "../type_is_nullable.h"

// #include "../constraints.h"

namespace sqlite_orm {

    namespace internal {

        struct column_identifier {

            /**
             *  Column name.
             */
            std::string name;
        };

        struct empty_setter {};

        /*
         *  Encapsulates object member pointers that are used as column fields,
         *  and whose object is mapped to storage.
         *  
         *  G is a member object pointer or member function pointer
         *  S is a member function pointer or `empty_setter`
         */
        template<class G, class S>
        struct column_field {
            using member_pointer_t = G;
            using setter_type = S;
            using object_type = member_object_type_t<G>;
            using field_type = member_field_type_t<G>;

            /**
             *  Member pointer used to read a field value.
             *  If it is a object member pointer it is also used to write a field value.
             */
            const member_pointer_t member_pointer;

            /**
             *  Setter member function to write a field value
             */
            SQLITE_ORM_NOUNIQUEADDRESS
            const setter_type setter;

            /**
             *  Simplified interface for `NOT NULL` constraint
             */
            constexpr bool is_not_null() const {
                return !type_is_nullable<field_type>::value;
            }
        };

        /*
         *  Encapsulates a tuple of column constraints.
         *  
         *  Op... is a constraints pack, e.g. primary_key_t, unique_t etc
         */
        template<class... Op>
        struct column_constraints {
            using constraints_type = std::tuple<Op...>;

            SQLITE_ORM_NOUNIQUEADDRESS
            constraints_type constraints;

            /**
             *  Checks whether contraints contain specified type.
             */
            template<template<class...> class Trait>
            constexpr static bool is() {
                return tuple_has<constraints_type, Trait>::value;
            }

            /**
             *  Simplified interface for `DEFAULT` constraint
             *  @return string representation of default value if it exists otherwise nullptr
             */
            std::unique_ptr<std::string> default_value() const;
        };

        /**
         *  Column definition.
         *  
         *  It is a composition of orthogonal information stored in different base classes.
         */
        template<class G, class S, class... Op>
        struct column_t : column_identifier, column_field<G, S>, column_constraints<Op...> {
#ifndef SQLITE_ORM_AGGREGATE_BASES_SUPPORTED
            column_t(std::string name, G memberPointer, S setter, std::tuple<Op...> op) :
                column_identifier{std::move(name)}, column_field<G, S>{memberPointer, setter},
                column_constraints<Op...>{std::move(op)} {}
#endif
        };

        template<class T, class SFINAE = void>
        struct column_field_expression {
            using type = void;
        };

        template<class G, class S, class... Op>
        struct column_field_expression<column_t<G, S, Op...>, void> {
            using type = typename column_t<G, S, Op...>::member_pointer_t;
        };

        template<typename T>
        using column_field_expression_t = typename column_field_expression<T>::type;

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_column_v = polyfill::is_specialization_of<T, column_t>::value;

        template<class T>
        using is_column = polyfill::bool_constant<is_column_v<T>>;

        template<class Elements, class F>
        using col_index_sequence_with_field_type =
            filter_tuple_sequence_t<Elements,
                                    check_if_is_type<F>::template fn,
                                    field_type_t,
                                    filter_tuple_sequence_t<Elements, is_column>>;

        template<class Elements, template<class...> class TraitFn>
        using col_index_sequence_with = filter_tuple_sequence_t<Elements,
                                                                check_if_has<TraitFn>::template fn,
                                                                constraints_type_t,
                                                                filter_tuple_sequence_t<Elements, is_column>>;

        template<class Elements, template<class...> class TraitFn>
        using col_index_sequence_excluding = filter_tuple_sequence_t<Elements,
                                                                     check_if_has_not<TraitFn>::template fn,
                                                                     constraints_type_t,
                                                                     filter_tuple_sequence_t<Elements, is_column>>;
    }

    /**
     *  Factory function for a column definition from a member object pointer of the object to be mapped.
     */
    template<class M, class... Op, internal::satisfies<std::is_member_object_pointer, M> = true>
    internal::column_t<M, internal::empty_setter, Op...>
    make_column(std::string name, M memberPointer, Op... constraints) {
        static_assert(polyfill::conjunction_v<internal::is_column_constraint<Op>...>, "Incorrect constraints pack");

        // attention: do not use `std::make_tuple()` for constructing the tuple member `[[no_unique_address]] column_constraints::constraints`,
        // as this will lead to UB with Clang on MinGW!
        SQLITE_ORM_CLANG_SUPPRESS_MISSING_BRACES(
            return {std::move(name), memberPointer, {}, std::tuple<Op...>{std::move(constraints)...}});
    }

    /**
     *  Factory function for a column definition from "setter" and "getter" member function pointers of the object to be mapped.
     */
    template<class G,
             class S,
             class... Op,
             internal::satisfies<internal::is_getter, G> = true,
             internal::satisfies<internal::is_setter, S> = true>
    internal::column_t<G, S, Op...> make_column(std::string name, S setter, G getter, Op... constraints) {
        static_assert(std::is_same<internal::setter_field_type_t<S>, internal::getter_field_type_t<G>>::value,
                      "Getter and setter must get and set same data type");
        static_assert(polyfill::conjunction_v<internal::is_column_constraint<Op>...>, "Incorrect constraints pack");

        // attention: do not use `std::make_tuple()` for constructing the tuple member `[[no_unique_address]] column_constraints::constraints`,
        // as this will lead to UB with Clang on MinGW!
        SQLITE_ORM_CLANG_SUPPRESS_MISSING_BRACES(
            return {std::move(name), getter, setter, std::tuple<Op...>{std::move(constraints)...}});
    }

    /**
     *  Factory function for a column definition from "getter" and "setter" member function pointers of the object to be mapped.
     */
    template<class G,
             class S,
             class... Op,
             internal::satisfies<internal::is_getter, G> = true,
             internal::satisfies<internal::is_setter, S> = true>
    internal::column_t<G, S, Op...> make_column(std::string name, G getter, S setter, Op... constraints) {
        static_assert(std::is_same<internal::setter_field_type_t<S>, internal::getter_field_type_t<G>>::value,
                      "Getter and setter must get and set same data type");
        static_assert(polyfill::conjunction_v<internal::is_column_constraint<Op>...>, "Incorrect constraints pack");

        // attention: do not use `std::make_tuple()` for constructing the tuple member `[[no_unique_address]] column_constraints::constraints`,
        // as this will lead to UB with Clang on MinGW!
        SQLITE_ORM_CLANG_SUPPRESS_MISSING_BRACES(
            return {std::move(name), getter, setter, std::tuple<Op...>{std::move(constraints)...}});
    }
}
#pragma once

#include <string>  //  std::string
#include <type_traits>  //  std::enable_if, std::is_same, std::remove_const
#include <vector>  //  std::vector
#include <tuple>  //  std::tuple
#include <utility>  //  std::move, std::forward
#include <sstream>  //  std::stringstream

// #include "functional/cxx_universal.h"

// #include "functional/cxx_type_traits_polyfill.h"

// #include "is_base_of_template.h"

// #include "type_traits.h"

// #include "collate_argument.h"

// #include "constraints.h"

// #include "optional_container.h"

namespace sqlite_orm {

    namespace internal {

        /**
         *  This is a cute class which allows storing something or nothing
         *  depending on template argument. Useful for optional class members
         */
        template<class T>
        struct optional_container {
            using type = T;

            type field;

            template<class L>
            void apply(const L& l) const {
                l(this->field);
            }
        };

        template<>
        struct optional_container<void> {
            using type = void;

            template<class L>
            void apply(const L&) const {
                //..
            }
        };
    }
}

// #include "serializer_context.h"

namespace sqlite_orm {

    namespace internal {

        struct serializer_context_base {
            bool replace_bindable_with_question = false;
            bool skip_table_name = true;
            bool use_parentheses = true;
            bool fts5_columns = false;
        };

        template<class DBOs>
        struct serializer_context : serializer_context_base {
            using db_objects_type = DBOs;

            const db_objects_type& db_objects;

            serializer_context(const db_objects_type& dbObjects) : db_objects{dbObjects} {}
        };

        template<class S>
        struct serializer_context_builder {
            using storage_type = S;
            using db_objects_type = typename storage_type::db_objects_type;

            serializer_context_builder(const storage_type& storage_) : storage{storage_} {}

            serializer_context<db_objects_type> operator()() const {
                return {obtain_db_objects(this->storage)};
            }

            const storage_type& storage;
        };
    }

}

// #include "serialize_result_type.h"

// #include "tags.h"

// #include "table_reference.h"

#include <type_traits>  //  std::remove_const, std::type_identity
#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
#include <concepts>
#endif

// #include "functional/cxx_type_traits_polyfill.h"

namespace sqlite_orm {
    namespace internal {
        /*
         *  Identity wrapper around a mapped object, facilitating uniform column pointer expressions.
         */
        template<class O>
        struct table_reference : polyfill::type_identity<O> {};

        template<class RecordSet>
        struct decay_table_ref : std::remove_const<RecordSet> {};
        template<class O>
        struct decay_table_ref<table_reference<O>> : polyfill::type_identity<O> {};
        template<class O>
        struct decay_table_ref<const table_reference<O>> : polyfill::type_identity<O> {};

        template<class RecordSet>
        using decay_table_ref_t = typename decay_table_ref<RecordSet>::type;
#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        template<auto recordset>
        using auto_decay_table_ref_t = typename decay_table_ref<decltype(recordset)>::type;
#endif

        template<class R>
        SQLITE_ORM_INLINE_VAR constexpr bool is_table_reference_v =
            polyfill::is_specialization_of_v<std::remove_const_t<R>, table_reference>;

        template<class R>
        struct is_table_reference : polyfill::bool_constant<is_table_reference_v<R>> {};
    }

#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
    /** @short Specifies that a type is a reference of a concrete table, especially of a derived class.
     *
     *  A concrete table reference has the following traits:
     *  - specialization of `table_reference`, whose `type` typename references a mapped object.
     */
    template<class R>
    concept orm_table_reference = polyfill::is_specialization_of_v<std::remove_const_t<R>, internal::table_reference>;
#endif
}

// #include "alias_traits.h"

#include <type_traits>  //  std::is_base_of, std::is_same
#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
#include <concepts>
#endif

// #include "functional/cxx_universal.h"

// #include "functional/cxx_type_traits_polyfill.h"

// #include "type_traits.h"

// #include "table_reference.h"

namespace sqlite_orm {

    /** @short Base class for a custom table alias, column alias or expression alias.
     */
    struct alias_tag {};

    namespace internal {

        template<class A>
        SQLITE_ORM_INLINE_VAR constexpr bool is_alias_v = std::is_base_of<alias_tag, A>::value;

        template<class A>
        struct is_alias : polyfill::bool_constant<is_alias_v<A>> {};

        /** @short Alias of a column in a record set, see `orm_column_alias`.
         */
        template<class A>
        SQLITE_ORM_INLINE_VAR constexpr bool is_column_alias_v =
            polyfill::conjunction<is_alias<A>, polyfill::negation<polyfill::is_detected<type_t, A>>>::value;

        template<class A>
        struct is_column_alias : is_alias<A> {};

        /** @short Alias of any type of record set, see `orm_recordset_alias`.
         */
        template<class A>
        SQLITE_ORM_INLINE_VAR constexpr bool is_recordset_alias_v =
            polyfill::conjunction<is_alias<A>, polyfill::is_detected<type_t, A>>::value;

        template<class A>
        struct is_recordset_alias : polyfill::bool_constant<is_recordset_alias_v<A>> {};

        /** @short Alias of a concrete table, see `orm_table_alias`.
         */
        template<class A>
        SQLITE_ORM_INLINE_VAR constexpr bool is_table_alias_v = polyfill::conjunction<
            is_recordset_alias<A>,
            polyfill::negation<std::is_same<polyfill::detected_t<type_t, A>, std::remove_const_t<A>>>>::value;

        template<class A>
        struct is_table_alias : polyfill::bool_constant<is_table_alias_v<A>> {};

        /** @short Moniker of a CTE, see `orm_cte_moniker`.
         */
        template<class A>
        SQLITE_ORM_INLINE_VAR constexpr bool is_cte_moniker_v =
#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
            polyfill::conjunction_v<is_recordset_alias<A>,
                                    std::is_same<polyfill::detected_t<type_t, A>, std::remove_const_t<A>>>;
#else
            false;
#endif

        template<class A>
        using is_cte_moniker = polyfill::bool_constant<is_cte_moniker_v<A>>;
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    template<class A>
    concept orm_alias = std::derived_from<A, alias_tag>;

    /** @short Specifies that a type is an alias of a column in a record set.
     *
     *  A column alias has the following traits:
     *  - is derived from `alias_tag`
     *  - must not have a nested `type` typename
     */
    template<class A>
    concept orm_column_alias = (orm_alias<A> && !orm_names_type<A>);

    /** @short Specifies that a type is an alias of any type of record set.
     *
     *  A record set alias has the following traits:
     *  - is derived from `alias_tag`.
     *  - has a nested `type` typename, which refers to a mapped object.
     */
    template<class A>
    concept orm_recordset_alias = (orm_alias<A> && orm_names_type<A>);

    /** @short Specifies that a type is an alias of a concrete table.
     *
     *  A concrete table alias has the following traits:
     *  - is derived from `alias_tag`.
     *  - has a `type` typename, which refers to another mapped object (i.e. doesn't refer to itself).
     */
    template<class A>
    concept orm_table_alias = (orm_recordset_alias<A> && !std::same_as<typename A::type, std::remove_const_t<A>>);

    /** @short Moniker of a CTE.
     *
     *  A CTE moniker has the following traits:
     *  - is derived from `alias_tag`.
     *  - has a `type` typename, which refers to itself.
     */
    template<class A>
    concept orm_cte_moniker = (orm_recordset_alias<A> && std::same_as<typename A::type, std::remove_const_t<A>>);

    /** @short Specifies that a type refers to a mapped table (possibly aliased).
     */
    template<class T>
    concept orm_refers_to_table = (orm_table_reference<T> || orm_table_alias<T>);

    /** @short Specifies that a type refers to a recordset.
     */
    template<class T>
    concept orm_refers_to_recordset = (orm_table_reference<T> || orm_recordset_alias<T>);

    /** @short Specifies that a type is a mapped recordset (table reference).
     */
    template<class T>
    concept orm_mapped_recordset = (orm_table_reference<T> || orm_cte_moniker<T>);
#endif
}

// #include "expression.h"

#include <tuple>
#include <type_traits>  //  std::enable_if
#include <utility>  //  std::move, std::forward, std::declval
// #include "functional/cxx_optional.h"

// #include "functional/cxx_universal.h"

// #include "functional/cxx_type_traits_polyfill.h"

// #include "tags.h"

namespace sqlite_orm {

    namespace internal {

        template<class L, class... Args>
        struct in_t;

        template<class L, class R>
        struct and_condition_t;

        template<class L, class R>
        struct or_condition_t;

        /**
         *  Result of c(...) function. Has operator= overloaded which returns assign_t
         */
        template<class T>
        struct expression_t {
            T value;

            template<class R>
            assign_t<T, R> operator=(R r) const {
                return {this->value, std::move(r)};
            }

            assign_t<T, nullptr_t> operator=(nullptr_t) const {
                return {this->value, nullptr};
            }
#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
            assign_t<T, std::nullopt_t> operator=(std::nullopt_t) const {
                return {this->value, std::nullopt};
            }
#endif
            template<class... Args>
            in_t<T, Args...> in(Args... args) const {
                return {this->value, {std::forward<Args>(args)...}, false};
            }

            template<class... Args>
            in_t<T, Args...> not_in(Args... args) const {
                return {this->value, {std::forward<Args>(args)...}, true};
            }

            template<class R>
            and_condition_t<T, R> and_(R right) const {
                return {this->value, std::move(right)};
            }

            template<class R>
            or_condition_t<T, R> or_(R right) const {
                return {this->value, std::move(right)};
            }
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool
            is_operator_argument_v<T, std::enable_if_t<polyfill::is_specialization_of<T, expression_t>::value>> = true;

        template<class T>
        T get_from_expression(T value) {
            return std::move(value);
        }

        template<class T>
        T get_from_expression(expression_t<T> expression) {
            return std::move(expression.value);
        }

        template<class T>
        using unwrap_expression_t = decltype(get_from_expression(std::declval<T>()));
    }

    /**
     *  Public interface for syntax sugar for columns. Example: `where(c(&User::id) == 5)` or
     * `storage.update(set(c(&User::name) = "Dua Lipa"));
     */
    template<class T>
    internal::expression_t<T> c(T value) {
        return {std::move(value)};
    }
}

// #include "column_pointer.h"

#include <type_traits>  //  std::enable_if, std::is_convertible
#include <utility>  // std::move

// #include "functional/cxx_core_features.h"

// #include "functional/cxx_type_traits_polyfill.h"

// #include "type_traits.h"

// #include "table_reference.h"

// #include "alias_traits.h"

// #include "tags.h"

namespace sqlite_orm {
    namespace internal {
        /**
         *  This class is used to store explicit mapped type T and its column descriptor (member pointer/getter/setter).
         *  Is useful when mapped type is derived from other type and base class has members mapped to a storage.
         */
        template<class T, class F>
        struct column_pointer {
            using type = T;
            using field_type = F;

            field_type field;
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_column_pointer_v =
            polyfill::is_specialization_of<T, column_pointer>::value;

        template<class T>
        struct is_column_pointer : polyfill::bool_constant<is_column_pointer_v<T>> {};

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_operator_argument_v<T, std::enable_if_t<is_column_pointer<T>::value>> =
            true;

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
        template<class A>
        struct alias_holder;
#endif
    }

    /**
     *  Explicitly refer to a column, used in contexts
     *  where the automatic object mapping deduction needs to be overridden.
     *
     *  Example:
     *  struct BaseType : { int64 id; };
     *  struct MyType : BaseType { ... };
     *  storage.select(column<MyType>(&BaseType::id));
     */
    template<class O, class Base, class F, internal::satisfies_not<internal::is_recordset_alias, O> = true>
    constexpr internal::column_pointer<O, F Base::*> column(F Base::*field) {
        static_assert(std::is_convertible<F Base::*, F O::*>::value, "Field must be from derived class");
        return {field};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Explicitly refer to a column.
     */
    template<orm_table_reference auto table, class O, class F>
    constexpr auto column(F O::*field) {
        return column<internal::auto_type_t<table>>(field);
    }

    // Intentionally place pointer-to-member operator for table references in the internal namespace
    // to facilitate ADL (Argument Dependent Lookup)
    namespace internal {
        /**
         *  Explicitly refer to a column.
         */
        template<orm_table_reference R, class O, class F>
        constexpr auto operator->*(const R& /*table*/, F O::*field) {
            return column<typename R::type>(field);
        }
    }

    /**
     *  Make a table reference.
     */
    template<class O>
        requires(!orm_recordset_alias<O>)
    consteval internal::table_reference<O> column() {
        return {};
    }

    /**
     *  Make a table reference.
     */
    template<class O>
        requires(!orm_recordset_alias<O>)
    consteval internal::table_reference<O> c() {
        return {};
    }
#endif

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
    /**
     *  Explicitly refer to a column alias mapped into a CTE or subquery.
     *
     *  Example:
     *  struct Object { ... };
     *  using cte_1 = decltype(1_ctealias);
     *  storage.with(cte<cte_1>()(select(&Object::id)), select(column<cte_1>(&Object::id)));
     *  storage.with(cte<cte_1>()(select(&Object::id)), select(column<cte_1>(1_colalias)));
     *  storage.with(cte<cte_1>()(select(as<colalias_a>(&Object::id))), select(column<cte_1>(colalias_a{})));
     *  storage.with(cte<cte_1>(colalias_a{})(select(&Object::id)), select(column<cte_1>(colalias_a{})));
     *  storage.with(cte<cte_1>()(select(as<colalias_a>(&Object::id))), select(column<cte_1>(get<colalias_a>())));
     */
    template<class Moniker, class F, internal::satisfies<internal::is_recordset_alias, Moniker> = true>
    constexpr auto column(F field) {
        using namespace ::sqlite_orm::internal;

        static_assert(is_cte_moniker_v<Moniker>, "`Moniker' must be a CTE moniker");

        if constexpr(polyfill::is_specialization_of_v<F, alias_holder>) {
            static_assert(is_column_alias_v<type_t<F>>);
            return column_pointer<Moniker, F>{{}};
        } else if constexpr(is_column_alias_v<F>) {
            return column_pointer<Moniker, alias_holder<F>>{{}};
        } else {
            return column_pointer<Moniker, F>{std::move(field)};
        }
        (void)field;
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Explicitly refer to a column mapped into a CTE or subquery.
     *
     *  Example:
     *  struct Object { ... };
     *  storage.with(cte<"z"_cte>()(select(&Object::id)), select(column<"z"_cte>(&Object::id)));
     *  storage.with(cte<"z"_cte>()(select(&Object::id)), select(column<"z"_cte>(1_colalias)));
     */
    template<orm_cte_moniker auto moniker, class F>
    constexpr auto column(F field) {
        using Moniker = std::remove_const_t<decltype(moniker)>;
        return column<Moniker>(std::forward<F>(field));
    }

    /**
     *  Explicitly refer to a column mapped into a CTE or subquery.
     *  
     *  @note (internal) Intentionally place in the sqlite_orm namespace for ADL (Argument Dependent Lookup)
     *  because recordset aliases are derived from `sqlite_orm::alias_tag`
     *
     *  Example:
     *  struct Object { ... };
     *  using cte_1 = decltype(1_ctealias);
     *  storage.with(cte<cte_1>()(select(&Object::id)), select(1_ctealias->*&Object::id));
     *  storage.with(cte<cte_1>()(select(&Object::id)), select(1_ctealias->*1_colalias));
     */
    template<orm_cte_moniker Moniker, class F>
    constexpr auto operator->*(const Moniker& /*moniker*/, F field) {
        return column<Moniker>(std::forward<F>(field));
    }
#endif
#endif
}
// #include "tags.h"

// #include "type_printer.h"

// #include "literal.h"

namespace sqlite_orm {
    namespace internal {

        /* 
         *  Protect an otherwise bindable element so that it is always serialized as a literal value.
         */
        template<class T>
        struct literal_holder {
            using type = T;

            type value;
        };

    }
}

namespace sqlite_orm {

    namespace internal {

        struct limit_string {
            operator std::string() const {
                return "LIMIT";
            }
        };

        /**
         *  Stores LIMIT/OFFSET info
         */
        template<class T, bool has_offset, bool offset_is_implicit, class O>
        struct limit_t : limit_string {
            T lim;
            optional_container<O> off;

            limit_t() = default;

            limit_t(decltype(lim) lim_) : lim(std::move(lim_)) {}

            limit_t(decltype(lim) lim_, decltype(off) off_) : lim(std::move(lim_)), off(std::move(off_)) {}
        };

        template<class T>
        struct is_limit : std::false_type {};

        template<class T, bool has_offset, bool offset_is_implicit, class O>
        struct is_limit<limit_t<T, has_offset, offset_is_implicit, O>> : std::true_type {};

        /**
         *  Stores OFFSET only info
         */
        template<class T>
        struct offset_t {
            T off;
        };

        template<class T>
        using is_offset = polyfill::is_specialization_of<T, offset_t>;

        /**
         *  Collated something
         */
        template<class T>
        struct collate_t : public condition_t {
            T expr;
            collate_argument argument;

            collate_t(T expr_, collate_argument argument_) : expr(std::move(expr_)), argument(argument_) {}

            operator std::string() const {
                return collate_constraint_t{this->argument};
            }
        };

        struct named_collate_base {
            std::string name;

            operator std::string() const {
                return "COLLATE " + this->name;
            }
        };

        /**
         *  Collated something with custom collate function
         */
        template<class T>
        struct named_collate : named_collate_base {
            T expr;

            named_collate(T expr_, std::string name_) : named_collate_base{std::move(name_)}, expr(std::move(expr_)) {}
        };

        struct negated_condition_string {
            operator std::string() const {
                return "NOT";
            }
        };

        /**
         *  Result of not operator
         */
        template<class C>
        struct negated_condition_t : condition_t, negated_condition_string {
            C c;

            negated_condition_t(C c_) : c(std::move(c_)) {}
        };

        /**
         *  Base class for binary conditions
         *  L is left argument type
         *  R is right argument type
         *  S is 'string' class (a class which has cast to `std::string` operator)
         *  Res is result type
         */
        template<class L, class R, class S, class Res>
        struct binary_condition : condition_t, S {
            using left_type = L;
            using right_type = R;
            using result_type = Res;

            left_type lhs;
            right_type rhs;

            binary_condition() = default;

            binary_condition(left_type l_, right_type r_) : lhs(std::move(l_)), rhs(std::move(r_)) {}
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_binary_condition_v = is_base_of_template_v<T, binary_condition>;

        template<class T>
        struct is_binary_condition : polyfill::bool_constant<is_binary_condition_v<T>> {};

        struct and_condition_string {
            serialize_result_type serialize() const {
                return "AND";
            }
        };

        /**
         *  Result of and operator
         */
        template<class L, class R>
        struct and_condition_t : binary_condition<L, R, and_condition_string, bool> {
            using super = binary_condition<L, R, and_condition_string, bool>;

            using super::super;
        };

        struct or_condition_string {
            serialize_result_type serialize() const {
                return "OR";
            }
        };

        /**
         *  Result of or operator
         */
        template<class L, class R>
        struct or_condition_t : binary_condition<L, R, or_condition_string, bool> {
            using super = binary_condition<L, R, or_condition_string, bool>;

            using super::super;
        };

        struct is_equal_string {
            serialize_result_type serialize() const {
                return "=";
            }
        };

        /**
         *  = and == operators object
         */
        template<class L, class R>
        struct is_equal_t : binary_condition<L, R, is_equal_string, bool>, negatable_t {
            using self = is_equal_t<L, R>;

            using binary_condition<L, R, is_equal_string, bool>::binary_condition;

            collate_t<self> collate_binary() const {
                return {*this, collate_argument::binary};
            }

            collate_t<self> collate_nocase() const {
                return {*this, collate_argument::nocase};
            }

            collate_t<self> collate_rtrim() const {
                return {*this, collate_argument::rtrim};
            }

            named_collate<self> collate(std::string name) const {
                return {*this, std::move(name)};
            }

            template<class C>
            named_collate<self> collate() const {
                std::stringstream ss;
                ss << C::name() << std::flush;
                return {*this, ss.str()};
            }
        };

        template<class L, class R>
        struct is_equal_with_table_t : negatable_t {
            using left_type = L;
            using right_type = R;

            right_type rhs;

            is_equal_with_table_t(right_type rhs) : rhs(std::move(rhs)) {}
        };

        struct is_not_equal_string {
            serialize_result_type serialize() const {
                return "!=";
            }
        };

        /**
         *  != operator object
         */
        template<class L, class R>
        struct is_not_equal_t : binary_condition<L, R, is_not_equal_string, bool>, negatable_t {
            using self = is_not_equal_t<L, R>;

            using binary_condition<L, R, is_not_equal_string, bool>::binary_condition;

            collate_t<self> collate_binary() const {
                return {*this, collate_argument::binary};
            }

            collate_t<self> collate_nocase() const {
                return {*this, collate_argument::nocase};
            }

            collate_t<self> collate_rtrim() const {
                return {*this, collate_argument::rtrim};
            }
        };

        struct greater_than_string {
            serialize_result_type serialize() const {
                return ">";
            }
        };

        /**
         *  > operator object.
         */
        template<class L, class R>
        struct greater_than_t : binary_condition<L, R, greater_than_string, bool>, negatable_t {
            using self = greater_than_t<L, R>;

            using binary_condition<L, R, greater_than_string, bool>::binary_condition;

            collate_t<self> collate_binary() const {
                return {*this, collate_argument::binary};
            }

            collate_t<self> collate_nocase() const {
                return {*this, collate_argument::nocase};
            }

            collate_t<self> collate_rtrim() const {
                return {*this, collate_argument::rtrim};
            }
        };

        struct greater_or_equal_string {
            serialize_result_type serialize() const {
                return ">=";
            }
        };

        /**
         *  >= operator object.
         */
        template<class L, class R>
        struct greater_or_equal_t : binary_condition<L, R, greater_or_equal_string, bool>, negatable_t {
            using self = greater_or_equal_t<L, R>;

            using binary_condition<L, R, greater_or_equal_string, bool>::binary_condition;

            collate_t<self> collate_binary() const {
                return {*this, collate_argument::binary};
            }

            collate_t<self> collate_nocase() const {
                return {*this, collate_argument::nocase};
            }

            collate_t<self> collate_rtrim() const {
                return {*this, collate_argument::rtrim};
            }
        };

        struct less_than_string {
            serialize_result_type serialize() const {
                return "<";
            }
        };

        /**
         *  < operator object.
         */
        template<class L, class R>
        struct less_than_t : binary_condition<L, R, less_than_string, bool>, negatable_t {
            using self = less_than_t<L, R>;

            using binary_condition<L, R, less_than_string, bool>::binary_condition;

            collate_t<self> collate_binary() const {
                return {*this, collate_argument::binary};
            }

            collate_t<self> collate_nocase() const {
                return {*this, collate_argument::nocase};
            }

            collate_t<self> collate_rtrim() const {
                return {*this, collate_argument::rtrim};
            }
        };

        struct less_or_equal_string {
            serialize_result_type serialize() const {
                return "<=";
            }
        };

        /**
         *  <= operator object.
         */
        template<class L, class R>
        struct less_or_equal_t : binary_condition<L, R, less_or_equal_string, bool>, negatable_t {
            using self = less_or_equal_t<L, R>;

            using binary_condition<L, R, less_or_equal_string, bool>::binary_condition;

            collate_t<self> collate_binary() const {
                return {*this, collate_argument::binary};
            }

            collate_t<self> collate_nocase() const {
                return {*this, collate_argument::nocase};
            }

            collate_t<self> collate_rtrim() const {
                return {*this, collate_argument::rtrim};
            }
        };

        struct in_base {
            bool negative = false;  //  used in not_in

#ifndef SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
            in_base(bool negative) : negative{negative} {}
#endif
        };

        /**
         *  IN operator object.
         */
        template<class L, class A>
        struct dynamic_in_t : condition_t, in_base, negatable_t {
            using self = dynamic_in_t<L, A>;

            L left;  //  left expression
            A argument;  //  in arg

            dynamic_in_t(L left_, A argument_, bool negative_) :
                in_base{negative_}, left(std::move(left_)), argument(std::move(argument_)) {}
        };

        template<class L, class... Args>
        struct in_t : condition_t, in_base, negatable_t {
            L left;
            std::tuple<Args...> argument;

            in_t(L left_, decltype(argument) argument_, bool negative_) :
                in_base{negative_}, left(std::move(left_)), argument(std::move(argument_)) {}
        };

        struct is_null_string {
            operator std::string() const {
                return "IS NULL";
            }
        };

        /**
         *  IS NULL operator object.
         */
        template<class T>
        struct is_null_t : is_null_string, negatable_t {
            using self = is_null_t<T>;

            T t;

            is_null_t(T t_) : t(std::move(t_)) {}
        };

        struct is_not_null_string {
            operator std::string() const {
                return "IS NOT NULL";
            }
        };

        /**
         *  IS NOT NULL operator object.
         */
        template<class T>
        struct is_not_null_t : is_not_null_string, negatable_t {
            using self = is_not_null_t<T>;

            T t;

            is_not_null_t(T t_) : t(std::move(t_)) {}
        };

        struct order_by_base {
            int asc_desc = 0;  //  1: asc, -1: desc
            std::string _collate_argument;

#ifndef SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
            order_by_base() = default;

            order_by_base(decltype(asc_desc) asc_desc_, decltype(_collate_argument) _collate_argument_) :
                asc_desc(asc_desc_), _collate_argument(std::move(_collate_argument_)) {}
#endif
        };

        struct order_by_string {
            operator std::string() const {
                return "ORDER BY";
            }
        };

        /**
         *  ORDER BY argument holder.
         */
        template<class O>
        struct order_by_t : order_by_base, order_by_string {
            using expression_type = O;
            using self = order_by_t<expression_type>;

            expression_type expression;

            order_by_t(expression_type expression_) : order_by_base(), expression(std::move(expression_)) {}

            self asc() const {
                auto res = *this;
                res.asc_desc = 1;
                return res;
            }

            self desc() const {
                auto res = *this;
                res.asc_desc = -1;
                return res;
            }

            self collate_binary() const {
                auto res = *this;
                res._collate_argument = collate_constraint_t::string_from_collate_argument(collate_argument::binary);
                return res;
            }

            self collate_nocase() const {
                auto res = *this;
                res._collate_argument = collate_constraint_t::string_from_collate_argument(collate_argument::nocase);
                return res;
            }

            self collate_rtrim() const {
                auto res = *this;
                res._collate_argument = collate_constraint_t::string_from_collate_argument(collate_argument::rtrim);
                return res;
            }

            self collate(std::string name) const {
                auto res = *this;
                res._collate_argument = std::move(name);
                return res;
            }

            template<class C>
            self collate() const {
                std::stringstream ss;
                ss << C::name() << std::flush;
                return this->collate(ss.str());
            }
        };

        /**
         *  ORDER BY pack holder.
         */
        template<class... Args>
        struct multi_order_by_t : order_by_string {
            using args_type = std::tuple<Args...>;

            args_type args;

            multi_order_by_t(args_type args_) : args{std::move(args_)} {}
        };

        struct dynamic_order_by_entry_t : order_by_base {
            std::string name;

            dynamic_order_by_entry_t(decltype(name) name_, int asc_desc_, std::string collate_argument_) :
                order_by_base{asc_desc_, std::move(collate_argument_)}, name(std::move(name_)) {}
        };

        /**
         *  C - serializer context class
         */
        template<class C>
        struct dynamic_order_by_t : order_by_string {
            using context_t = C;
            using entry_t = dynamic_order_by_entry_t;
            using const_iterator = typename std::vector<entry_t>::const_iterator;

            dynamic_order_by_t(const context_t& context_) : context(context_) {}

            template<class O>
            void push_back(order_by_t<O> order_by) {
                auto newContext = this->context;
                newContext.skip_table_name = true;
                auto columnName = serialize(order_by.expression, newContext);
                this->entries.emplace_back(std::move(columnName),
                                           order_by.asc_desc,
                                           std::move(order_by._collate_argument));
            }

            const_iterator begin() const {
                return this->entries.begin();
            }

            const_iterator end() const {
                return this->entries.end();
            }

            void clear() {
                this->entries.clear();
            }

          protected:
            std::vector<entry_t> entries;
            context_t context;
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_order_by_v =
            polyfill::disjunction<polyfill::is_specialization_of<T, order_by_t>,
                                  polyfill::is_specialization_of<T, multi_order_by_t>,
                                  polyfill::is_specialization_of<T, dynamic_order_by_t>>::value;

        template<class T>
        struct is_order_by : polyfill::bool_constant<is_order_by_v<T>> {};

        struct between_string {
            operator std::string() const {
                return "BETWEEN";
            }
        };

        /**
         *  BETWEEN operator object.
         */
        template<class A, class T>
        struct between_t : condition_t, between_string {
            using expression_type = A;
            using lower_type = T;
            using upper_type = T;

            expression_type expr;
            lower_type b1;
            upper_type b2;

            between_t(expression_type expr_, lower_type b1_, upper_type b2_) :
                expr(std::move(expr_)), b1(std::move(b1_)), b2(std::move(b2_)) {}
        };

        struct like_string {
            operator std::string() const {
                return "LIKE";
            }
        };

        /**
         *  LIKE operator object.
         */
        template<class A, class T, class E>
        struct like_t : condition_t, like_string, negatable_t {
            using self = like_t<A, T, E>;
            using arg_t = A;
            using pattern_t = T;
            using escape_t = E;

            arg_t arg;
            pattern_t pattern;
            optional_container<escape_t> arg3;  //  not escape cause escape exists as a function here

            like_t(arg_t arg_, pattern_t pattern_, optional_container<escape_t> escape_) :
                arg(std::move(arg_)), pattern(std::move(pattern_)), arg3(std::move(escape_)) {}

            template<class C>
            like_t<A, T, C> escape(C c) const {
                optional_container<C> newArg3{std::move(c)};
                return {std::move(this->arg), std::move(this->pattern), std::move(newArg3)};
            }
        };

        struct glob_string {
            operator std::string() const {
                return "GLOB";
            }
        };

        template<class A, class T>
        struct glob_t : condition_t, glob_string, negatable_t {
            using self = glob_t<A, T>;
            using arg_t = A;
            using pattern_t = T;

            arg_t arg;
            pattern_t pattern;

            glob_t(arg_t arg_, pattern_t pattern_) : arg(std::move(arg_)), pattern(std::move(pattern_)) {}
        };

        struct cross_join_string {
            operator std::string() const {
                return "CROSS JOIN";
            }
        };

        /**
         *  CROSS JOIN holder.
         *  T is joined type which represents any mapped table.
         */
        template<class T>
        struct cross_join_t : cross_join_string {
            using type = T;
        };

        struct natural_join_string {
            operator std::string() const {
                return "NATURAL JOIN";
            }
        };

        /**
         *  NATURAL JOIN holder.
         *  T is joined type which represents any mapped table.
         */
        template<class T>
        struct natural_join_t : natural_join_string {
            using type = T;
        };

        struct left_join_string {
            operator std::string() const {
                return "LEFT JOIN";
            }
        };

        /**
         *  LEFT JOIN holder.
         *  T is joined type which represents any mapped table.
         *  O is on(...) argument type.
         */
        template<class T, class O>
        struct left_join_t : left_join_string {
            using type = T;
            using on_type = O;

            on_type constraint;

            left_join_t(on_type constraint_) : constraint(std::move(constraint_)) {}
        };

        struct join_string {
            operator std::string() const {
                return "JOIN";
            }
        };

        /**
         *  Simple JOIN holder.
         *  T is joined type which represents any mapped table.
         *  O is on(...) argument type.
         */
        template<class T, class O>
        struct join_t : join_string {
            using type = T;
            using on_type = O;

            on_type constraint;

            join_t(on_type constraint_) : constraint(std::move(constraint_)) {}
        };

        struct left_outer_join_string {
            operator std::string() const {
                return "LEFT OUTER JOIN";
            }
        };

        /**
         *  LEFT OUTER JOIN holder.
         *  T is joined type which represents any mapped table.
         *  O is on(...) argument type.
         */
        template<class T, class O>
        struct left_outer_join_t : left_outer_join_string {
            using type = T;
            using on_type = O;

            on_type constraint;

            left_outer_join_t(on_type constraint_) : constraint(std::move(constraint_)) {}
        };

        struct on_string {
            operator std::string() const {
                return "ON";
            }
        };

        /**
         *  on(...) argument holder used for JOIN, LEFT JOIN, LEFT OUTER JOIN and INNER JOIN
         *  T is on type argument.
         */
        template<class T>
        struct on_t : on_string {
            using arg_type = T;

            arg_type arg;

            on_t(arg_type arg_) : arg(std::move(arg_)) {}
        };

        /**
         *  USING argument holder.
         */
        template<class T, class M>
        struct using_t {
            column_pointer<T, M> column;

            operator std::string() const {
                return "USING";
            }
        };

        struct inner_join_string {
            operator std::string() const {
                return "INNER JOIN";
            }
        };

        /**
         *  INNER JOIN holder.
         *  T is joined type which represents any mapped table.
         *  O is on(...) argument type.
         */
        template<class T, class O>
        struct inner_join_t : inner_join_string {
            using type = T;
            using on_type = O;

            on_type constraint;

            inner_join_t(on_type constraint_) : constraint(std::move(constraint_)) {}
        };

        struct cast_string {
            operator std::string() const {
                return "CAST";
            }
        };

        /**
         *  CAST holder.
         *  T is a type to cast to
         *  E is an expression type
         *  Example: cast<std::string>(&User::id)
         */
        template<class T, class E>
        struct cast_t : cast_string {
            using to_type = T;
            using expression_type = E;

            expression_type expression;

            cast_t(expression_type expression_) : expression(std::move(expression_)) {}
        };

        template<class... Args>
        struct from_t {
            using tuple_type = std::tuple<Args...>;
        };

        template<class T>
        using is_from = polyfill::is_specialization_of<T, from_t>;

        template<class T>
        using is_constrained_join = polyfill::is_detected<on_type_t, T>;
    }

    /**
     *  Explicit FROM function. Usage:
     *  `storage.select(&User::id, from<User>());`
     */
    template<class... Tables>
    internal::from_t<Tables...> from() {
        static_assert(sizeof...(Tables) > 0, "");
        return {};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Explicit FROM function. Usage:
     *  `storage.select(&User::id, from<"a"_alias.for_<User>>());`
     */
    template<orm_refers_to_recordset auto... recordsets>
    auto from() {
        return from<internal::auto_decay_table_ref_t<recordsets>...>();
    }
#endif

    // Intentionally place operators for types classified as arithmetic or general operator arguments in the internal namespace
    // to facilitate ADL (Argument Dependent Lookup)
    namespace internal {
        template<
            class T,
            std::enable_if_t<polyfill::disjunction<std::is_base_of<negatable_t, T>, is_operator_argument<T>>::value,
                             bool> = true>
        negated_condition_t<T> operator!(T arg) {
            return {std::move(arg)};
        }

        template<class L,
                 class R,
                 std::enable_if_t<polyfill::disjunction<std::is_base_of<arithmetic_t, L>,
                                                        std::is_base_of<arithmetic_t, R>,
                                                        is_operator_argument<L>,
                                                        is_operator_argument<R>>::value,
                                  bool> = true>
        less_than_t<unwrap_expression_t<L>, unwrap_expression_t<R>> operator<(L l, R r) {
            return {get_from_expression(std::forward<L>(l)), get_from_expression(std::forward<R>(r))};
        }

        template<class L,
                 class R,
                 std::enable_if_t<polyfill::disjunction<std::is_base_of<arithmetic_t, L>,
                                                        std::is_base_of<arithmetic_t, R>,
                                                        is_operator_argument<L>,
                                                        is_operator_argument<R>>::value,
                                  bool> = true>
        less_or_equal_t<unwrap_expression_t<L>, unwrap_expression_t<R>> operator<=(L l, R r) {
            return {get_from_expression(std::forward<L>(l)), get_from_expression(std::forward<R>(r))};
        }

        template<class L,
                 class R,
                 std::enable_if_t<polyfill::disjunction<std::is_base_of<arithmetic_t, L>,
                                                        std::is_base_of<arithmetic_t, R>,
                                                        is_operator_argument<L>,
                                                        is_operator_argument<R>>::value,
                                  bool> = true>
        greater_than_t<unwrap_expression_t<L>, unwrap_expression_t<R>> operator>(L l, R r) {
            return {get_from_expression(std::forward<L>(l)), get_from_expression(std::forward<R>(r))};
        }

        template<class L,
                 class R,
                 std::enable_if_t<polyfill::disjunction<std::is_base_of<arithmetic_t, L>,
                                                        std::is_base_of<arithmetic_t, R>,
                                                        is_operator_argument<L>,
                                                        is_operator_argument<R>>::value,
                                  bool> = true>
        greater_or_equal_t<unwrap_expression_t<L>, unwrap_expression_t<R>> operator>=(L l, R r) {
            return {get_from_expression(std::forward<L>(l)), get_from_expression(std::forward<R>(r))};
        }

        template<class L,
                 class R,
                 std::enable_if_t<polyfill::disjunction<std::is_base_of<arithmetic_t, L>,
                                                        std::is_base_of<arithmetic_t, R>,
                                                        std::is_base_of<condition_t, L>,
                                                        std::is_base_of<condition_t, R>,
                                                        is_operator_argument<L>,
                                                        is_operator_argument<R>>::value,
                                  bool> = true>
        is_equal_t<unwrap_expression_t<L>, unwrap_expression_t<R>> operator==(L l, R r) {
            return {get_from_expression(std::forward<L>(l)), get_from_expression(std::forward<R>(r))};
        }

        template<class L,
                 class R,
                 std::enable_if_t<polyfill::disjunction<std::is_base_of<arithmetic_t, L>,
                                                        std::is_base_of<arithmetic_t, R>,
                                                        std::is_base_of<condition_t, L>,
                                                        std::is_base_of<condition_t, R>,
                                                        is_operator_argument<L>,
                                                        is_operator_argument<R>>::value,
                                  bool> = true>
        is_not_equal_t<unwrap_expression_t<L>, unwrap_expression_t<R>> operator!=(L l, R r) {
            return {get_from_expression(std::forward<L>(l)), get_from_expression(std::forward<R>(r))};
        }

        template<class L,
                 class R,
                 std::enable_if_t<polyfill::disjunction<std::is_base_of<condition_t, L>,
                                                        std::is_base_of<condition_t, R>,
                                                        is_operator_argument<L>,
                                                        is_operator_argument<R>>::value,
                                  bool> = true>
        and_condition_t<unwrap_expression_t<L>, unwrap_expression_t<R>> operator&&(L l, R r) {
            return {get_from_expression(std::forward<L>(l)), get_from_expression(std::forward<R>(r))};
        }

        template<class L,
                 class R,
                 std::enable_if_t<
                     polyfill::disjunction<std::is_base_of<condition_t, L>, std::is_base_of<condition_t, R>>::value,
                     bool> = true>
        or_condition_t<unwrap_expression_t<L>, unwrap_expression_t<R>> operator||(L l, R r) {
            return {get_from_expression(std::forward<L>(l)), get_from_expression(std::forward<R>(r))};
        }

        template<
            class L,
            class R,
            std::enable_if_t<polyfill::conjunction<
                                 polyfill::disjunction<std::is_base_of<conc_string, L>,
                                                       std::is_base_of<conc_string, R>,
                                                       is_operator_argument<L>,
                                                       is_operator_argument<R>>,
                                 // exclude conditions
                                 polyfill::negation<polyfill::disjunction<std::is_base_of<condition_t, L>,
                                                                          std::is_base_of<condition_t, R>>>>::value,
                             bool> = true>
        conc_t<unwrap_expression_t<L>, unwrap_expression_t<R>> operator||(L l, R r) {
            return {get_from_expression(std::forward<L>(l)), get_from_expression(std::forward<R>(r))};
        }
    }

    template<class F, class O>
    internal::using_t<O, F O::*> using_(F O::*field) {
        return {field};
    }
    template<class T, class M>
    internal::using_t<T, M> using_(internal::column_pointer<T, M> field) {
        return {std::move(field)};
    }

    template<class T>
    internal::on_t<T> on(T t) {
        return {std::move(t)};
    }

    template<class T>
    internal::cross_join_t<T> cross_join() {
        return {};
    }

    template<class T>
    internal::natural_join_t<T> natural_join() {
        return {};
    }

    template<class T, class O>
    internal::left_join_t<T, O> left_join(O o) {
        return {std::move(o)};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    template<orm_refers_to_recordset auto alias, class On>
    auto left_join(On on) {
        return left_join<internal::auto_decay_table_ref_t<alias>, On>(std::move(on));
    }
#endif

    template<class T, class O>
    internal::join_t<T, O> join(O o) {
        return {std::move(o)};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    template<orm_refers_to_recordset auto alias, class On>
    auto join(On on) {
        return join<internal::auto_decay_table_ref_t<alias>, On>(std::move(on));
    }
#endif

    template<class T, class O>
    internal::left_outer_join_t<T, O> left_outer_join(O o) {
        return {std::move(o)};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    template<orm_refers_to_recordset auto alias, class On>
    auto left_outer_join(On on) {
        return left_outer_join<internal::auto_decay_table_ref_t<alias>, On>(std::move(on));
    }
#endif

    template<class T, class O>
    internal::inner_join_t<T, O> inner_join(O o) {
        return {std::move(o)};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    template<orm_refers_to_recordset auto alias, class On>
    auto inner_join(On on) {
        return inner_join<internal::auto_decay_table_ref_t<alias>, On>(std::move(on));
    }
#endif

    template<class T>
    internal::offset_t<T> offset(T off) {
        return {std::move(off)};
    }

    template<class T>
    internal::limit_t<T, false, false, void> limit(T lim) {
        return {std::move(lim)};
    }

    template<class T, class O, internal::satisfies_not<internal::is_offset, T> = true>
    internal::limit_t<T, true, true, O> limit(O off, T lim) {
        return {std::move(lim), {std::move(off)}};
    }

    template<class T, class O>
    internal::limit_t<T, true, false, O> limit(T lim, internal::offset_t<O> offt) {
        return {std::move(lim), {std::move(offt.off)}};
    }

    template<class L, class R>
    auto and_(L l, R r) {
        using namespace ::sqlite_orm::internal;
        return and_condition_t<unwrap_expression_t<L>, unwrap_expression_t<R>>{get_from_expression(std::forward<L>(l)),
                                                                               get_from_expression(std::forward<R>(r))};
    }

    template<class L, class R>
    auto or_(L l, R r) {
        using namespace ::sqlite_orm::internal;
        return or_condition_t<unwrap_expression_t<L>, unwrap_expression_t<R>>{get_from_expression(std::forward<L>(l)),
                                                                              get_from_expression(std::forward<R>(r))};
    }

    template<class T>
    internal::is_not_null_t<T> is_not_null(T t) {
        return {std::move(t)};
    }

    template<class T>
    internal::is_null_t<T> is_null(T t) {
        return {std::move(t)};
    }

    template<class L, class E>
    internal::dynamic_in_t<L, std::vector<E>> in(L l, std::vector<E> values) {
        return {std::move(l), std::move(values), false};
    }

    template<class L, class E>
    internal::dynamic_in_t<L, std::vector<E>> in(L l, std::initializer_list<E> values) {
        return {std::move(l), std::move(values), false};
    }

    template<class L, class A>
    internal::dynamic_in_t<L, A> in(L l, A arg) {
        return {std::move(l), std::move(arg), false};
    }

    template<class L, class E>
    internal::dynamic_in_t<L, std::vector<E>> not_in(L l, std::vector<E> values) {
        return {std::move(l), std::move(values), true};
    }

    template<class L, class E>
    internal::dynamic_in_t<L, std::vector<E>> not_in(L l, std::initializer_list<E> values) {
        return {std::move(l), std::move(values), true};
    }

    template<class L, class A>
    internal::dynamic_in_t<L, A> not_in(L l, A arg) {
        return {std::move(l), std::move(arg), true};
    }

    template<class L, class R>
    internal::is_equal_t<L, R> is_equal(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    template<class L, class R>
    internal::is_equal_t<L, R> eq(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    template<class L, class R>
    internal::is_equal_with_table_t<L, R> is_equal(R rhs) {
        return {std::move(rhs)};
    }

    template<class L, class R>
    internal::is_not_equal_t<L, R> is_not_equal(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    template<class L, class R>
    internal::is_not_equal_t<L, R> ne(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    template<class L, class R>
    internal::greater_than_t<L, R> greater_than(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    template<class L, class R>
    internal::greater_than_t<L, R> gt(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    template<class L, class R>
    internal::greater_or_equal_t<L, R> greater_or_equal(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    template<class L, class R>
    internal::greater_or_equal_t<L, R> ge(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    template<class L, class R>
    internal::less_than_t<L, R> less_than(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    /**
     *  [Deprecation notice] This function is deprecated and will be removed in v1.10. Use the accurately named function `less_than(...)` instead.
     */
    template<class L, class R>
    [[deprecated("Use the accurately named function `less_than(...)` instead")]] internal::less_than_t<L, R>
    lesser_than(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    template<class L, class R>
    internal::less_than_t<L, R> lt(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    template<class L, class R>
    internal::less_or_equal_t<L, R> less_or_equal(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    /**
     *  [Deprecation notice] This function is deprecated and will be removed in v1.10. Use the accurately named function `less_or_equal(...)` instead.
     */
    template<class L, class R>
    [[deprecated("Use the accurately named function `less_or_equal(...)` instead")]] internal::less_or_equal_t<L, R>
    lesser_or_equal(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    template<class L, class R>
    internal::less_or_equal_t<L, R> le(L l, R r) {
        return {std::move(l), std::move(r)};
    }

    /**
     * ORDER BY column, column alias or expression
     * 
     * Examples:
     * storage.select(&User::name, order_by(&User::id))
     * storage.select(as<colalias_a>(&User::name), order_by(get<colalias_a>()))
     */
    template<class O, internal::satisfies_not<std::is_base_of, integer_printer, type_printer<O>> = true>
    internal::order_by_t<O> order_by(O o) {
        return {std::move(o)};
    }

    /**
     * ORDER BY positional ordinal
     * 
     * Examples:
     * storage.select(&User::name, order_by(1))
     */
    template<class O, internal::satisfies<std::is_base_of, integer_printer, type_printer<O>> = true>
    internal::order_by_t<internal::literal_holder<O>> order_by(O o) {
        return {{std::move(o)}};
    }

    /**
     * ORDER BY column1, column2
     * Example: storage.get_all<Singer>(multi_order_by(order_by(&Singer::name).asc(), order_by(&Singer::gender).desc())
     */
    template<class... Args>
    internal::multi_order_by_t<Args...> multi_order_by(Args... args) {
        return {{std::forward<Args>(args)...}};
    }

    /**
     * ORDER BY column1, column2
     * Difference from `multi_order_by` is that `dynamic_order_by` can be changed at runtime using `push_back` member
     * function Example:
     *  auto orderBy = dynamic_order_by(storage);
     *  if(someCondition) {
     *      orderBy.push_back(&User::id);
     *  } else {
     *      orderBy.push_back(&User::name);
     *      orderBy.push_back(&User::birthDate);
     *  }
     */
    template<class S>
    internal::dynamic_order_by_t<internal::serializer_context<typename S::db_objects_type>>
    dynamic_order_by(const S& storage) {
        internal::serializer_context_builder<S> builder(storage);
        return builder();
    }

    /**
     *  X BETWEEN Y AND Z
     *  Example: storage.select(between(&User::id, 10, 20))
     */
    template<class A, class T>
    internal::between_t<A, T> between(A expr, T b1, T b2) {
        return {std::move(expr), std::move(b1), std::move(b2)};
    }

    /**
     *  X LIKE Y
     *  Example: storage.select(like(&User::name, "T%"))
     */
    template<class A, class T>
    internal::like_t<A, T, void> like(A a, T t) {
        return {std::move(a), std::move(t), {}};
    }

    /**
     *  X GLOB Y
     *  Example: storage.select(glob(&User::name, "*S"))
     */
    template<class A, class T>
    internal::glob_t<A, T> glob(A a, T t) {
        return {std::move(a), std::move(t)};
    }

    /**
     *  X LIKE Y ESCAPE Z
     *  Example: storage.select(like(&User::name, "T%", "%"))
     */
    template<class A, class T, class E>
    internal::like_t<A, T, E> like(A a, T t, E e) {
        return {std::move(a), std::move(t), {std::move(e)}};
    }

    /**
     *  CAST(X AS type).
     *  Example: cast<std::string>(&User::id)
     */
    template<class T, class E>
    internal::cast_t<T, E> cast(E e) {
        return {std::move(e)};
    }
}
#pragma once

#include <type_traits>  //  std::enable_if, std::is_same, std::conditional
#include <utility>  //  std::make_index_sequence, std::move
#include <string>  //  std::string
#include <sstream>  //  std::stringstream
#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
#include <array>
#endif

// #include "functional/cxx_type_traits_polyfill.h"

// #include "functional/mpl/conditional.h"

// #include "functional/cstring_literal.h"

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
#include <utility>  //  std::index_sequence
#include <algorithm>  //  std::copy_n
#endif

// #include "cxx_universal.h"
//  ::size_t

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
namespace sqlite_orm::internal {
    /*
     *  Wraps a C string of fixed size.
     *  Its main purpose is to enable the user-defined string literal operator template.
     */
    template<size_t N>
    struct cstring_literal {
        static constexpr size_t size() {
            return N - 1;
        }

        constexpr cstring_literal(const char (&cstr)[N]) {
            std::copy_n(cstr, N, this->cstr);
        }

        char cstr[N];
    };

    template<template<char...> class Template, cstring_literal literal, size_t... Idx>
    consteval auto explode_into(std::index_sequence<Idx...>) {
        return Template<literal.cstr[Idx]...>{};
    }
}
#endif

// #include "type_traits.h"

// #include "alias_traits.h"

// #include "table_type_of.h"

// #include "tags.h"

// #include "column_pointer.h"

namespace sqlite_orm {

    namespace internal {
#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        template<class T>
        inline constexpr bool is_operator_argument_v<T, std::enable_if_t<orm_column_alias<T>>> = true;
#endif

        /**
         *  This is a common built-in class used for character based table aliases.
         *  For convenience there exist public type aliases `alias_a`, `alias_b`, ...
         *  The easiest way to create a table alias is using `"z"_alias.for_<Object>()`.
         */
        template<class T, char A, char... X>
        struct recordset_alias : alias_tag {
            using type = T;

            static std::string get() {
                return {A, X...};
            }
        };

        /**
         *  Column expression with table alias attached like 'C.ID'. This is not a column alias
         */
        template<class T, class C>
        struct alias_column_t {
            using alias_type = T;
            using column_type = C;

            column_type column;
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool
            is_operator_argument_v<T, std::enable_if_t<polyfill::is_specialization_of<T, alias_column_t>::value>> =
                true;

        struct basic_table;

        /*
         * Encapsulates extracting the alias identifier of a non-alias.
         * 
         * `extract()` always returns the empty string.
         * `as_alias()` is used in contexts where a table might be aliased, and the empty string is returned.
         * `as_qualifier()` is used in contexts where a table might be aliased, and the given table's name is returned.
         */
        template<class T, class SFINAE = void>
        struct alias_extractor {
            static std::string extract() {
                return {};
            }

            static std::string as_alias() {
                return {};
            }

            template<class X = basic_table>
            static const std::string& as_qualifier(const X& table) {
                return table.name;
            }
        };

        /*
         * Encapsulates extracting the alias identifier of an alias.
         * 
         * `extract()` always returns the alias identifier or CTE moniker.
         * `as_alias()` is used in contexts where a recordset is aliased, and the alias identifier is returned.
         * `as_qualifier()` is used in contexts where a table is aliased, and the alias identifier is returned.
         */
        template<class A>
        struct alias_extractor<A, match_if<is_alias, A>> {
            static std::string extract() {
                std::stringstream ss;
                ss << A::get();
                return ss.str();
            }

            // for column and regular table aliases -> alias identifier
            template<class T = A, satisfies_not<std::is_same, polyfill::detected_t<type_t, T>, A> = true>
            static std::string as_alias() {
                return alias_extractor::extract();
            }

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
            // for CTE monikers -> empty
            template<class T = A, satisfies<std::is_same, polyfill::detected_t<type_t, T>, A> = true>
            static std::string as_alias() {
                return {};
            }
#endif

            // for regular table aliases -> alias identifier
            template<class T = A, satisfies<is_table_alias, T> = true>
            static std::string as_qualifier(const basic_table&) {
                return alias_extractor::extract();
            }
        };

        /**
         * Used to store alias for expression
         */
        template<class T, class E>
        struct as_t {
            using alias_type = T;
            using expression_type = E;

            expression_type expression;
        };

        /**
         *  Built-in column alias.
         *  For convenience there exist type aliases `colalias_a`, `colalias_b`, ...
         *  The easiest way to create a column alias is using `"xyz"_col`.
         */
        template<char A, char... X>
        struct column_alias : alias_tag {
            static std::string get() {
                return {A, X...};
            }
        };

        template<class T>
        struct alias_holder {
            using type = T;

            alias_holder() = default;
            // CTE feature needs it to implicitly convert a column alias to an alias_holder; see `cte()` factory function
            alias_holder(const T&) noexcept {}
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool
            is_operator_argument_v<T, std::enable_if_t<polyfill::is_specialization_of<T, alias_holder>::value>> = true;

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        template<char A, char... X>
        struct recordset_alias_builder {
            template<class T>
            [[nodiscard]] consteval recordset_alias<T, A, X...> for_() const {
                return {};
            }

            template<auto t>
            [[nodiscard]] consteval auto for_() const {
                using T = std::remove_const_t<decltype(t)>;
                return recordset_alias<T, A, X...>{};
            }
        };
#endif

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
        template<size_t n, char... C>
        SQLITE_ORM_CONSTEVAL auto n_to_colalias() {
            constexpr column_alias<'1' + n % 10, C...> colalias{};
            if constexpr(n > 10) {
                return n_to_colalias<n / 10, '1' + n % 10, C...>();
            } else {
                return colalias;
            }
        }

        template<class T>
        inline constexpr bool is_builtin_numeric_column_alias_v = false;
        template<char... C>
        inline constexpr bool is_builtin_numeric_column_alias_v<column_alias<C...>> = ((C >= '0' && C <= '9') && ...);
#endif
    }

    /**
     *  Using a column pointer, create a column reference to an aliased table column.
     *  
     *  Example:
     *  using als = alias_u<User>;
     *  select(alias_column<als>(column<User>(&User::id)))
     */
    template<class A,
             class C,
             std::enable_if_t<
                 polyfill::conjunction<internal::is_table_alias<A>,
                                       polyfill::negation<internal::is_cte_moniker<internal::type_t<A>>>>::value,
                 bool> = true>
    constexpr auto alias_column(C field) {
        using namespace ::sqlite_orm::internal;
        using aliased_type = type_t<A>;
        static_assert(is_field_of_v<C, aliased_type>, "Column must be from aliased table");

        return alias_column_t<A, C>{std::move(field)};
    }

    /**
     *  Using an object member field, create a column reference to an aliased table column.
     *  
     *  @note The object member pointer can be from a derived class without explicitly forming a column pointer.
     *  
     *  Example:
     *  using als = alias_u<User>;
     *  select(alias_column<als>(&User::id))
     */
    template<class A,
             class F,
             class O,
             std::enable_if_t<
                 polyfill::conjunction<internal::is_table_alias<A>,
                                       polyfill::negation<internal::is_cte_moniker<internal::type_t<A>>>>::value,
                 bool> = true>
    constexpr auto alias_column(F O::*field) {
        using namespace ::sqlite_orm::internal;
        using aliased_type = type_t<A>;
        static_assert(is_field_of_v<F O::*, aliased_type>, "Column must be from aliased table");

        using C1 =
            mpl::conditional_t<std::is_same<O, aliased_type>::value, F O::*, column_pointer<aliased_type, F O::*>>;
        return alias_column_t<A, C1>{C1{field}};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Create a column reference to an aliased table column.
     *  
     *  @note An object member pointer can be from a derived class without explicitly forming a column pointer.
     *  
     *  Example:
     *  constexpr orm_table_alias auto als = "u"_alias.for_<User>();
     *  select(alias_column<als>(&User::id))
     */
    template<orm_table_alias auto als, class C>
        requires(!orm_cte_moniker<internal::auto_type_t<als>>)
    constexpr auto alias_column(C field) {
        using namespace ::sqlite_orm::internal;
        using A = decltype(als);
        using aliased_type = type_t<A>;
        static_assert(is_field_of_v<C, aliased_type>, "Column must be from aliased table");

        if constexpr(is_column_pointer_v<C>) {
            return alias_column_t<A, C>{std::move(field)};
        } else if constexpr(std::is_same_v<member_object_type_t<C>, aliased_type>) {
            return alias_column_t<A, C>{field};
        } else {
            // wrap in column_pointer
            using C1 = column_pointer<aliased_type, C>;
            return alias_column_t<A, C1>{{field}};
        }
    }

    /**
     *  Create a column reference to an aliased table column.
     *  
     *  @note An object member pointer can be from a derived class without explicitly forming a column pointer.
     *  
     *  @note (internal) Intentionally place in the sqlite_orm namespace for ADL (Argument Dependent Lookup)
     *  because recordset aliases are derived from `sqlite_orm::alias_tag`
     *  
     *  Example:
     *  constexpr auto als = "u"_alias.for_<User>();
     *  select(als->*&User::id)
     */
    template<orm_table_alias A, class F>
        requires(!orm_cte_moniker<internal::type_t<A>>)
    constexpr auto operator->*(const A& /*tableAlias*/, F field) {
        return alias_column<A>(std::move(field));
    }
#endif

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
    /**
     *  Create a column reference to an aliased CTE column.
     */
    template<class A,
             class C,
             std::enable_if_t<
                 polyfill::conjunction_v<internal::is_table_alias<A>, internal::is_cte_moniker<internal::type_t<A>>>,
                 bool> = true>
    constexpr auto alias_column(C c) {
        using namespace internal;
        using cte_moniker_t = type_t<A>;

        if constexpr(is_column_pointer_v<C>) {
            static_assert(std::is_same<table_type_of_t<C>, cte_moniker_t>::value,
                          "Column pointer must match aliased CTE");
            return alias_column_t<A, C>{c};
        } else {
            auto cp = column<cte_moniker_t>(c);
            return alias_column_t<A, decltype(cp)>{std::move(cp)};
        }
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Create a column reference to an aliased CTE column.
     *  
     *  @note (internal) Intentionally place in the sqlite_orm namespace for ADL (Argument Dependent Lookup)
     *  because recordset aliases are derived from `sqlite_orm::alias_tag`
     */
    template<orm_table_alias A, class C>
        requires(orm_cte_moniker<internal::type_t<A>>)
    constexpr auto operator->*(const A& /*tableAlias*/, C c) {
        return alias_column<A>(std::move(c));
    }

    /**
     *  Create a column reference to an aliased CTE column.
     */
    template<orm_table_alias auto als, class C>
        requires(orm_cte_moniker<internal::auto_type_t<als>>)
    constexpr auto alias_column(C c) {
        using A = std::remove_const_t<decltype(als)>;
        return alias_column<A>(std::move(c));
    }
#endif
#endif

    /** 
     *  Alias a column expression.
     */
    template<class A, class E, internal::satisfies<internal::is_column_alias, A> = true>
    internal::as_t<A, E> as(E expression) {
        return {std::move(expression)};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /** 
     *  Alias a column expression.
     */
    template<orm_column_alias auto als, class E>
    auto as(E expression) {
        return internal::as_t<decltype(als), E>{std::move(expression)};
    }

    /**
     *  Alias a column expression.
     */
    template<orm_column_alias A, class E>
    internal::as_t<A, E> operator>>=(E expression, const A&) {
        return {std::move(expression)};
    }
#else
    /**
     *  Alias a column expression.
     */
    template<class A, class E, internal::satisfies<internal::is_column_alias, A> = true>
    internal::as_t<A, E> operator>>=(E expression, const A&) {
        return {std::move(expression)};
    }
#endif

    /**
     *  Wrap a column alias in an alias holder.
     */
    template<class T>
    internal::alias_holder<T> get() {
        static_assert(internal::is_column_alias_v<T>, "");
        return {};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    template<orm_column_alias auto als>
    auto get() {
        return internal::alias_holder<decltype(als)>{};
    }
#endif

    template<class T>
    using alias_a = internal::recordset_alias<T, 'a'>;
    template<class T>
    using alias_b = internal::recordset_alias<T, 'b'>;
    template<class T>
    using alias_c = internal::recordset_alias<T, 'c'>;
    template<class T>
    using alias_d = internal::recordset_alias<T, 'd'>;
    template<class T>
    using alias_e = internal::recordset_alias<T, 'e'>;
    template<class T>
    using alias_f = internal::recordset_alias<T, 'f'>;
    template<class T>
    using alias_g = internal::recordset_alias<T, 'g'>;
    template<class T>
    using alias_h = internal::recordset_alias<T, 'h'>;
    template<class T>
    using alias_i = internal::recordset_alias<T, 'i'>;
    template<class T>
    using alias_j = internal::recordset_alias<T, 'j'>;
    template<class T>
    using alias_k = internal::recordset_alias<T, 'k'>;
    template<class T>
    using alias_l = internal::recordset_alias<T, 'l'>;
    template<class T>
    using alias_m = internal::recordset_alias<T, 'm'>;
    template<class T>
    using alias_n = internal::recordset_alias<T, 'n'>;
    template<class T>
    using alias_o = internal::recordset_alias<T, 'o'>;
    template<class T>
    using alias_p = internal::recordset_alias<T, 'p'>;
    template<class T>
    using alias_q = internal::recordset_alias<T, 'q'>;
    template<class T>
    using alias_r = internal::recordset_alias<T, 'r'>;
    template<class T>
    using alias_s = internal::recordset_alias<T, 's'>;
    template<class T>
    using alias_t = internal::recordset_alias<T, 't'>;
    template<class T>
    using alias_u = internal::recordset_alias<T, 'u'>;
    template<class T>
    using alias_v = internal::recordset_alias<T, 'v'>;
    template<class T>
    using alias_w = internal::recordset_alias<T, 'w'>;
    template<class T>
    using alias_x = internal::recordset_alias<T, 'x'>;
    template<class T>
    using alias_y = internal::recordset_alias<T, 'y'>;
    template<class T>
    using alias_z = internal::recordset_alias<T, 'z'>;

    using colalias_a = internal::column_alias<'a'>;
    using colalias_b = internal::column_alias<'b'>;
    using colalias_c = internal::column_alias<'c'>;
    using colalias_d = internal::column_alias<'d'>;
    using colalias_e = internal::column_alias<'e'>;
    using colalias_f = internal::column_alias<'f'>;
    using colalias_g = internal::column_alias<'g'>;
    using colalias_h = internal::column_alias<'h'>;
    using colalias_i = internal::column_alias<'i'>;

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /** @short Create a table alias.
     *
     *  Examples:
     *  constexpr orm_table_alias auto z_alias = alias<'z'>.for_<User>();
     */
    template<char A, char... X>
    inline constexpr internal::recordset_alias_builder<A, X...> alias{};

    inline namespace literals {
        /** @short Create a table alias.
         *
         *  Examples:
         *  constexpr orm_table_alias auto z_alias = "z"_alias.for_<User>();
         */
        template<internal::cstring_literal name>
        [[nodiscard]] consteval auto operator"" _alias() {
            return internal::explode_into<internal::recordset_alias_builder, name>(
                std::make_index_sequence<name.size()>{});
        }

        /** @short Create a column alias.
         *  column_alias<'a'[, ...]> from a string literal.
         *  E.g. "a"_col, "b"_col
         */
        template<internal::cstring_literal name>
        [[nodiscard]] consteval auto operator"" _col() {
            return internal::explode_into<internal::column_alias, name>(std::make_index_sequence<name.size()>{});
        }
    }
#endif

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
    inline namespace literals {
        /**
         *  column_alias<'1'[, ...]> from a numeric literal.
         *  E.g. 1_colalias, 2_colalias
         */
        template<char... Chars>
        [[nodiscard]] SQLITE_ORM_CONSTEVAL auto operator"" _colalias() {
            // numeric identifiers are used for automatically assigning implicit aliases to unaliased column expressions,
            // which start at "1".
            static_assert(std::array{Chars...}[0] > '0');
            return internal::column_alias<Chars...>{};
        }
    }
#endif
}
#pragma once

#include <string>  //  std::string
#include <tuple>  //  std::make_tuple, std::tuple_size
#include <type_traits>  //  std::forward, std::is_base_of, std::enable_if
#include <memory>  //  std::unique_ptr
#include <vector>  //  std::vector

// #include "functional/cxx_type_traits_polyfill.h"

// #include "functional/mpl/conditional.h"

// #include "is_base_of_template.h"

// #include "tuple_helper/tuple_traits.h"

// #include "conditions.h"

// #include "serialize_result_type.h"

// #include "operators.h"

// #include "tags.h"

// #include "table_reference.h"

// #include "ast/into.h"

// #include "../functional/cxx_type_traits_polyfill.h"

namespace sqlite_orm {
    namespace internal {

        template<class T>
        struct into_t {
            using type = T;
        };

        template<class T>
        using is_into = polyfill::is_specialization_of<T, into_t>;
    }

    template<class T>
    internal::into_t<T> into() {
        return {};
    }
}

namespace sqlite_orm {

    using int64 = sqlite_int64;
    using uint64 = sqlite_uint64;

    namespace internal {

        template<class T>
        struct unique_ptr_result_of {};

        /**
         *  Base class for operator overloading
         *  R - return type
         *  S - class with operator std::string
         *  Args - function arguments types
         */
        template<class R, class S, class... Args>
        struct built_in_function_t : S, arithmetic_t {
            using return_type = R;
            using string_type = S;
            using args_type = std::tuple<Args...>;

            static constexpr size_t args_size = std::tuple_size<args_type>::value;

            args_type args;

            built_in_function_t(args_type&& args_) : args(std::move(args_)) {}
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_built_in_function_v =
            is_base_of_template<T, built_in_function_t>::value;

        template<class T>
        struct is_built_in_function : polyfill::bool_constant<is_built_in_function_v<T>> {};

        template<class F, class W>
        struct filtered_aggregate_function {
            using function_type = F;
            using where_expression = W;

            function_type function;
            where_expression where;
        };

        template<class C>
        struct where_t;

        template<class R, class S, class... Args>
        struct built_in_aggregate_function_t : built_in_function_t<R, S, Args...> {
            using super = built_in_function_t<R, S, Args...>;

            using super::super;

            template<class W>
            filtered_aggregate_function<built_in_aggregate_function_t<R, S, Args...>, W> filter(where_t<W> wh) {
                return {*this, std::move(wh.expression)};
            }
        };

        struct typeof_string {
            serialize_result_type serialize() const {
                return "TYPEOF";
            }
        };

        struct unicode_string {
            serialize_result_type serialize() const {
                return "UNICODE";
            }
        };

        struct length_string {
            serialize_result_type serialize() const {
                return "LENGTH";
            }
        };

        struct abs_string {
            serialize_result_type serialize() const {
                return "ABS";
            }
        };

        struct lower_string {
            serialize_result_type serialize() const {
                return "LOWER";
            }
        };

        struct upper_string {
            serialize_result_type serialize() const {
                return "UPPER";
            }
        };

        struct last_insert_rowid_string {
            serialize_result_type serialize() const {
                return "LAST_INSERT_ROWID";
            }
        };

        struct total_changes_string {
            serialize_result_type serialize() const {
                return "TOTAL_CHANGES";
            }
        };

        struct changes_string {
            serialize_result_type serialize() const {
                return "CHANGES";
            }
        };

        struct trim_string {
            serialize_result_type serialize() const {
                return "TRIM";
            }
        };

        struct ltrim_string {
            serialize_result_type serialize() const {
                return "LTRIM";
            }
        };

        struct rtrim_string {
            serialize_result_type serialize() const {
                return "RTRIM";
            }
        };

        struct hex_string {
            serialize_result_type serialize() const {
                return "HEX";
            }
        };

        struct quote_string {
            serialize_result_type serialize() const {
                return "QUOTE";
            }
        };

        struct randomblob_string {
            serialize_result_type serialize() const {
                return "RANDOMBLOB";
            }
        };

        struct instr_string {
            serialize_result_type serialize() const {
                return "INSTR";
            }
        };

        struct replace_string {
            serialize_result_type serialize() const {
                return "REPLACE";
            }
        };

        struct round_string {
            serialize_result_type serialize() const {
                return "ROUND";
            }
        };

#if SQLITE_VERSION_NUMBER >= 3007016
        struct char_string {
            serialize_result_type serialize() const {
                return "CHAR";
            }
        };

        struct random_string {
            serialize_result_type serialize() const {
                return "RANDOM";
            }
        };

#endif

        struct coalesce_string {
            serialize_result_type serialize() const {
                return "COALESCE";
            }
        };

        struct ifnull_string {
            serialize_result_type serialize() const {
                return "IFNULL";
            }
        };

        struct nullif_string {
            serialize_result_type serialize() const {
                return "NULLIF";
            }
        };

        struct date_string {
            serialize_result_type serialize() const {
                return "DATE";
            }
        };

        struct time_string {
            serialize_result_type serialize() const {
                return "TIME";
            }
        };

        struct datetime_string {
            serialize_result_type serialize() const {
                return "DATETIME";
            }
        };

        struct julianday_string {
            serialize_result_type serialize() const {
                return "JULIANDAY";
            }
        };

        struct strftime_string {
            serialize_result_type serialize() const {
                return "STRFTIME";
            }
        };

        struct zeroblob_string {
            serialize_result_type serialize() const {
                return "ZEROBLOB";
            }
        };

        struct substr_string {
            serialize_result_type serialize() const {
                return "SUBSTR";
            }
        };
#ifdef SQLITE_SOUNDEX
        struct soundex_string {
            serialize_result_type serialize() const {
                return "SOUNDEX";
            }
        };
#endif
        struct total_string {
            serialize_result_type serialize() const {
                return "TOTAL";
            }
        };

        struct sum_string {
            serialize_result_type serialize() const {
                return "SUM";
            }
        };

        struct count_string {
            serialize_result_type serialize() const {
                return "COUNT";
            }
        };

        /**
         *  T is use to specify type explicitly for queries like
         *  SELECT COUNT(*) FROM table_name;
         *  T can be omitted with void.
         */
        template<class T>
        struct count_asterisk_t : count_string {
            using type = T;

            template<class W>
            filtered_aggregate_function<count_asterisk_t<T>, W> filter(where_t<W> wh) {
                return {*this, std::move(wh.expression)};
            }
        };

        /**
         *  The same thing as count<T>() but without T arg.
         *  Is used in cases like this:
         *    SELECT cust_code, cust_name, cust_city, grade
         *    FROM customer
         *    WHERE grade=2 AND EXISTS
         *        (SELECT COUNT(*)
         *        FROM customer
         *        WHERE grade=2
         *        GROUP BY grade
         *        HAVING COUNT(*)>2);
         *  `c++`
         *  auto rows =
         *      storage.select(columns(&Customer::code, &Customer::name, &Customer::city, &Customer::grade),
         *          where(is_equal(&Customer::grade, 2)
         *              and exists(select(count<Customer>(),
         *                  where(is_equal(&Customer::grade, 2)),
         *          group_by(&Customer::grade),
         *          having(greater_than(count(), 2))))));
         */
        struct count_asterisk_without_type : count_string {};

        struct avg_string {
            serialize_result_type serialize() const {
                return "AVG";
            }
        };

        struct max_string {
            serialize_result_type serialize() const {
                return "MAX";
            }
        };

        struct min_string {
            serialize_result_type serialize() const {
                return "MIN";
            }
        };

        struct group_concat_string {
            serialize_result_type serialize() const {
                return "GROUP_CONCAT";
            }
        };
#ifdef SQLITE_ENABLE_MATH_FUNCTIONS
        struct acos_string {
            serialize_result_type serialize() const {
                return "ACOS";
            }
        };

        struct acosh_string {
            serialize_result_type serialize() const {
                return "ACOSH";
            }
        };

        struct asin_string {
            serialize_result_type serialize() const {
                return "ASIN";
            }
        };

        struct asinh_string {
            serialize_result_type serialize() const {
                return "ASINH";
            }
        };

        struct atan_string {
            serialize_result_type serialize() const {
                return "ATAN";
            }
        };

        struct atan2_string {
            serialize_result_type serialize() const {
                return "ATAN2";
            }
        };

        struct atanh_string {
            serialize_result_type serialize() const {
                return "ATANH";
            }
        };

        struct ceil_string {
            serialize_result_type serialize() const {
                return "CEIL";
            }
        };

        struct ceiling_string {
            serialize_result_type serialize() const {
                return "CEILING";
            }
        };

        struct cos_string {
            serialize_result_type serialize() const {
                return "COS";
            }
        };

        struct cosh_string {
            serialize_result_type serialize() const {
                return "COSH";
            }
        };

        struct degrees_string {
            serialize_result_type serialize() const {
                return "DEGREES";
            }
        };

        struct exp_string {
            serialize_result_type serialize() const {
                return "EXP";
            }
        };

        struct floor_string {
            serialize_result_type serialize() const {
                return "FLOOR";
            }
        };

        struct ln_string {
            serialize_result_type serialize() const {
                return "LN";
            }
        };

        struct log_string {
            serialize_result_type serialize() const {
                return "LOG";
            }
        };

        struct log10_string {
            serialize_result_type serialize() const {
                return "LOG10";
            }
        };

        struct log2_string {
            serialize_result_type serialize() const {
                return "LOG2";
            }
        };

        struct mod_string {
            serialize_result_type serialize() const {
                return "MOD";
            }
        };

        struct pi_string {
            serialize_result_type serialize() const {
                return "PI";
            }
        };

        struct pow_string {
            serialize_result_type serialize() const {
                return "POW";
            }
        };

        struct power_string {
            serialize_result_type serialize() const {
                return "POWER";
            }
        };

        struct radians_string {
            serialize_result_type serialize() const {
                return "RADIANS";
            }
        };

        struct sin_string {
            serialize_result_type serialize() const {
                return "SIN";
            }
        };

        struct sinh_string {
            serialize_result_type serialize() const {
                return "SINH";
            }
        };

        struct sqrt_string {
            serialize_result_type serialize() const {
                return "SQRT";
            }
        };

        struct tan_string {
            serialize_result_type serialize() const {
                return "TAN";
            }
        };

        struct tanh_string {
            serialize_result_type serialize() const {
                return "TANH";
            }
        };

        struct trunc_string {
            serialize_result_type serialize() const {
                return "TRUNC";
            }
        };

#endif  //  SQLITE_ENABLE_MATH_FUNCTIONS
#ifdef SQLITE_ENABLE_JSON1
        struct json_string {
            serialize_result_type serialize() const {
                return "JSON";
            }
        };

        struct json_array_string {
            serialize_result_type serialize() const {
                return "JSON_ARRAY";
            }
        };

        struct json_array_length_string {
            serialize_result_type serialize() const {
                return "JSON_ARRAY_LENGTH";
            }
        };

        struct json_extract_string {
            serialize_result_type serialize() const {
                return "JSON_EXTRACT";
            }
        };

        struct json_insert_string {
            serialize_result_type serialize() const {
                return "JSON_INSERT";
            }
        };

        struct json_replace_string {
            serialize_result_type serialize() const {
                return "JSON_REPLACE";
            }
        };

        struct json_set_string {
            serialize_result_type serialize() const {
                return "JSON_SET";
            }
        };

        struct json_object_string {
            serialize_result_type serialize() const {
                return "JSON_OBJECT";
            }
        };

        struct json_patch_string {
            serialize_result_type serialize() const {
                return "JSON_PATCH";
            }
        };

        struct json_remove_string {
            serialize_result_type serialize() const {
                return "JSON_REMOVE";
            }
        };

        struct json_type_string {
            serialize_result_type serialize() const {
                return "JSON_TYPE";
            }
        };

        struct json_valid_string {
            serialize_result_type serialize() const {
                return "JSON_VALID";
            }
        };

        struct json_quote_string {
            serialize_result_type serialize() const {
                return "JSON_QUOTE";
            }
        };

        struct json_group_array_string {
            serialize_result_type serialize() const {
                return "JSON_GROUP_ARRAY";
            }
        };

        struct json_group_object_string {
            serialize_result_type serialize() const {
                return "JSON_GROUP_OBJECT";
            }
        };
#endif  //  SQLITE_ENABLE_JSON1

        template<class T>
        using field_type_or_type_t = polyfill::detected_or_t<T, type_t, member_field_type<T>>;

        template<class T, class X, class Y, class Z>
        struct highlight_t {
            using table_type = T;
            using argument0_type = X;
            using argument1_type = Y;
            using argument2_type = Z;

            argument0_type argument0;
            argument1_type argument1;
            argument2_type argument2;

            highlight_t(argument0_type argument0, argument1_type argument1, argument2_type argument2) :
                argument0(std::move(argument0)), argument1(std::move(argument1)), argument2(std::move(argument2)) {}
        };
    }

#ifdef SQLITE_ENABLE_MATH_FUNCTIONS

    /**
     *  ACOS(X) function https://www.sqlite.org/lang_mathfunc.html#acos
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::acos(&Triangle::cornerA));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::acos_string, X> acos(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  ACOS(X) function https://www.sqlite.org/lang_mathfunc.html#acos
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::acos<std::optional<double>>(&Triangle::cornerA));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::acos_string, X> acos(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  ACOSH(X) function https://www.sqlite.org/lang_mathfunc.html#acosh
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::acosh(&Triangle::cornerA));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::acosh_string, X> acosh(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  ACOSH(X) function https://www.sqlite.org/lang_mathfunc.html#acosh
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::acosh<std::optional<double>>(&Triangle::cornerA));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::acosh_string, X> acosh(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  ASIN(X) function https://www.sqlite.org/lang_mathfunc.html#asin
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::asin(&Triangle::cornerA));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::asin_string, X> asin(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  ASIN(X) function https://www.sqlite.org/lang_mathfunc.html#asin
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::asin<std::optional<double>>(&Triangle::cornerA));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::asin_string, X> asin(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  ASINH(X) function https://www.sqlite.org/lang_mathfunc.html#asinh
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::asinh(&Triangle::cornerA));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::asinh_string, X> asinh(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  ASINH(X) function https://www.sqlite.org/lang_mathfunc.html#asinh
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::asinh<std::optional<double>>(&Triangle::cornerA));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::asinh_string, X> asinh(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  ATAN(X) function https://www.sqlite.org/lang_mathfunc.html#atan
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::atan(1));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::atan_string, X> atan(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  ATAN(X) function https://www.sqlite.org/lang_mathfunc.html#atan
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::atan<std::optional<double>>(1));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::atan_string, X> atan(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  ATAN2(X, Y) function https://www.sqlite.org/lang_mathfunc.html#atan2
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::atan2(1, 3));   //  decltype(rows) is std::vector<double>
     */
    template<class X, class Y>
    internal::built_in_function_t<double, internal::atan2_string, X, Y> atan2(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    /**
     *  ATAN2(X, Y) function https://www.sqlite.org/lang_mathfunc.html#atan2
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::atan2<std::optional<double>>(1, 3));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X, class Y>
    internal::built_in_function_t<R, internal::atan2_string, X, Y> atan2(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    /**
     *  ATANH(X) function https://www.sqlite.org/lang_mathfunc.html#atanh
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::atanh(1));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::atanh_string, X> atanh(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  ATANH(X) function https://www.sqlite.org/lang_mathfunc.html#atanh
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::atanh<std::optional<double>>(1));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::atanh_string, X> atanh(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  CEIL(X) function https://www.sqlite.org/lang_mathfunc.html#ceil
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::ceil(&User::rating));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::ceil_string, X> ceil(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  CEIL(X) function https://www.sqlite.org/lang_mathfunc.html#ceil
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::ceil<std::optional<double>>(&User::rating));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::ceil_string, X> ceil(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  CEILING(X) function https://www.sqlite.org/lang_mathfunc.html#ceil
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::ceiling(&User::rating));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::ceiling_string, X> ceiling(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  CEILING(X) function https://www.sqlite.org/lang_mathfunc.html#ceil
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::ceiling<std::optional<double>>(&User::rating));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::ceiling_string, X> ceiling(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  COS(X) function https://www.sqlite.org/lang_mathfunc.html#cos
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::cos(&Triangle::cornerB));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::cos_string, X> cos(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  COS(X) function https://www.sqlite.org/lang_mathfunc.html#cos
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::cos<std::optional<double>>(&User::rating));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::cos_string, X> cos(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  COSH(X) function https://www.sqlite.org/lang_mathfunc.html#cosh
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::cosh(&Triangle::cornerB));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::cosh_string, X> cosh(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  COSH(X)  function https://www.sqlite.org/lang_mathfunc.html#cosh
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::cosh<std::optional<double>>(&User::rating));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::cosh_string, X> cosh(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  DEGREES(X) function https://www.sqlite.org/lang_mathfunc.html#degrees
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::degrees(&Triangle::cornerB));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::degrees_string, X> degrees(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  DEGREES(X) function https://www.sqlite.org/lang_mathfunc.html#degrees
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::degrees<std::optional<double>>(&User::rating));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::degrees_string, X> degrees(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  EXP(X) function https://www.sqlite.org/lang_mathfunc.html#exp
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::exp(&Triangle::cornerB));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::exp_string, X> exp(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  EXP(X) function https://www.sqlite.org/lang_mathfunc.html#exp
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::exp<std::optional<double>>(&User::rating));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::exp_string, X> exp(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  FLOOR(X) function https://www.sqlite.org/lang_mathfunc.html#floor
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::floor(&User::rating));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::floor_string, X> floor(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  FLOOR(X) function https://www.sqlite.org/lang_mathfunc.html#floor
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::floor<std::optional<double>>(&User::rating));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::floor_string, X> floor(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  LN(X) function https://www.sqlite.org/lang_mathfunc.html#ln
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::ln(200));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::ln_string, X> ln(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  LN(X) function https://www.sqlite.org/lang_mathfunc.html#ln
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::ln<std::optional<double>>(200));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::ln_string, X> ln(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  LOG(X) function https://www.sqlite.org/lang_mathfunc.html#log
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::log(100));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::log_string, X> log(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  LOG(X) function https://www.sqlite.org/lang_mathfunc.html#log
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::log<std::optional<double>>(100));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::log_string, X> log(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  LOG10(X) function https://www.sqlite.org/lang_mathfunc.html#log
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::log10(100));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::log10_string, X> log10(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  LOG10(X) function https://www.sqlite.org/lang_mathfunc.html#log
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::log10<std::optional<double>>(100));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::log10_string, X> log10(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  LOG(B, X) function https://www.sqlite.org/lang_mathfunc.html#log
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::log(10, 100));   //  decltype(rows) is std::vector<double>
     */
    template<class B, class X>
    internal::built_in_function_t<double, internal::log_string, B, X> log(B b, X x) {
        return {std::tuple<B, X>{std::forward<B>(b), std::forward<X>(x)}};
    }

    /**
     *  LOG(B, X) function https://www.sqlite.org/lang_mathfunc.html#log
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::log<std::optional<double>>(10, 100));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class B, class X>
    internal::built_in_function_t<R, internal::log_string, B, X> log(B b, X x) {
        return {std::tuple<B, X>{std::forward<B>(b), std::forward<X>(x)}};
    }

    /**
     *  LOG2(X) function https://www.sqlite.org/lang_mathfunc.html#log2
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::log2(64));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::log2_string, X> log2(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  LOG2(X) function https://www.sqlite.org/lang_mathfunc.html#log2
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::log2<std::optional<double>>(64));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::log2_string, X> log2(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  MOD(X, Y) function https://www.sqlite.org/lang_mathfunc.html#mod
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::mod_f(6, 5));   //  decltype(rows) is std::vector<double>
     */
    template<class X, class Y>
    internal::built_in_function_t<double, internal::mod_string, X, Y> mod_f(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    /**
     *  MOD(X, Y) function https://www.sqlite.org/lang_mathfunc.html#mod
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::mod_f<std::optional<double>>(6, 5));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X, class Y>
    internal::built_in_function_t<R, internal::mod_string, X, Y> mod_f(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    /**
     *  PI() function https://www.sqlite.org/lang_mathfunc.html#pi
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::pi());   //  decltype(rows) is std::vector<double>
     */
    inline internal::built_in_function_t<double, internal::pi_string> pi() {
        return {{}};
    }

    /**
     *  PI() function https://www.sqlite.org/lang_mathfunc.html#pi
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, etc.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::pi<float>());   //  decltype(rows) is std::vector<float>
     */
    template<class R>
    internal::built_in_function_t<R, internal::pi_string> pi() {
        return {{}};
    }

    /**
     *  POW(X, Y) function https://www.sqlite.org/lang_mathfunc.html#pow
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::pow(2, 5));   //  decltype(rows) is std::vector<double>
     */
    template<class X, class Y>
    internal::built_in_function_t<double, internal::pow_string, X, Y> pow(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    /**
     *  POW(X, Y) function https://www.sqlite.org/lang_mathfunc.html#pow
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::pow<std::optional<double>>(2, 5));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X, class Y>
    internal::built_in_function_t<R, internal::pow_string, X, Y> pow(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    /**
     *  POWER(X, Y) function https://www.sqlite.org/lang_mathfunc.html#pow
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::power(2, 5));   //  decltype(rows) is std::vector<double>
     */
    template<class X, class Y>
    internal::built_in_function_t<double, internal::power_string, X, Y> power(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    /**
     *  POWER(X, Y) function https://www.sqlite.org/lang_mathfunc.html#pow
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::power<std::optional<double>>(2, 5));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X, class Y>
    internal::built_in_function_t<R, internal::power_string, X, Y> power(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    /**
     *  RADIANS(X) function https://www.sqlite.org/lang_mathfunc.html#radians
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::radians(&Triangle::cornerAInDegrees));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::radians_string, X> radians(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  RADIANS(X) function https://www.sqlite.org/lang_mathfunc.html#radians
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::radians<std::optional<double>>(&Triangle::cornerAInDegrees));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::radians_string, X> radians(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  SIN(X) function https://www.sqlite.org/lang_mathfunc.html#sin
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::sin(&Triangle::cornerA));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::sin_string, X> sin(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  SIN(X) function https://www.sqlite.org/lang_mathfunc.html#sin
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::sin<std::optional<double>>(&Triangle::cornerA));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::sin_string, X> sin(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  SINH(X) function https://www.sqlite.org/lang_mathfunc.html#sinh
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::sinh(&Triangle::cornerA));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::sinh_string, X> sinh(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  SINH(X) function https://www.sqlite.org/lang_mathfunc.html#sinh
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::sinh<std::optional<double>>(&Triangle::cornerA));   //  decltype(rows) is std::vector<std::optional<double>>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::sinh_string, X> sinh(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  SQRT(X) function https://www.sqlite.org/lang_mathfunc.html#sqrt
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::sqrt(25));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::sqrt_string, X> sqrt(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  SQRT(X) function https://www.sqlite.org/lang_mathfunc.html#sqrt
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::sqrt<int>(25));   //  decltype(rows) is std::vector<int>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::sqrt_string, X> sqrt(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  TAN(X) function https://www.sqlite.org/lang_mathfunc.html#tan
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::tan(&Triangle::cornerC));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::tan_string, X> tan(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  TAN(X) function https://www.sqlite.org/lang_mathfunc.html#tan
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::tan<float>(&Triangle::cornerC));   //  decltype(rows) is std::vector<float>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::tan_string, X> tan(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  TANH(X) function https://www.sqlite.org/lang_mathfunc.html#tanh
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::tanh(&Triangle::cornerC));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::tanh_string, X> tanh(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  TANH(X) function https://www.sqlite.org/lang_mathfunc.html#tanh
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::tanh<float>(&Triangle::cornerC));   //  decltype(rows) is std::vector<float>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::tanh_string, X> tanh(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  TRUNC(X) function https://www.sqlite.org/lang_mathfunc.html#trunc
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::trunc(5.5));   //  decltype(rows) is std::vector<double>
     */
    template<class X>
    internal::built_in_function_t<double, internal::trunc_string, X> trunc(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  TRUNC(X) function https://www.sqlite.org/lang_mathfunc.html#trunc
     *
     *  Difference with the previous function is that previous override has `double` as return type but this
     *  override accepts return type from you as a template argument. You can use any bindable type:
     *  `float`, `int`, `std::optional<double>` etc. This override is handy when you expect `null` as result.
     *
     *  Example:
     *
     *  auto rows = storage.select(sqlite_orm::trunc<float>(5.5));   //  decltype(rows) is std::vector<float>
     */
    template<class R, class X>
    internal::built_in_function_t<R, internal::trunc_string, X> trunc(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }
#endif  //  SQLITE_ENABLE_MATH_FUNCTIONS
    /**
     *  TYPEOF(x) function https://sqlite.org/lang_corefunc.html#typeof
     */
    template<class T>
    internal::built_in_function_t<std::string, internal::typeof_string, T> typeof_(T t) {
        return {std::tuple<T>{std::forward<T>(t)}};
    }

    /**
     *  UNICODE(x) function https://sqlite.org/lang_corefunc.html#unicode
     */
    template<class T>
    internal::built_in_function_t<int, internal::unicode_string, T> unicode(T t) {
        return {std::tuple<T>{std::forward<T>(t)}};
    }

    /**
     *  LENGTH(x) function https://sqlite.org/lang_corefunc.html#length
     */
    template<class T>
    internal::built_in_function_t<int, internal::length_string, T> length(T t) {
        return {std::tuple<T>{std::forward<T>(t)}};
    }

    /**
     *  ABS(x) function https://sqlite.org/lang_corefunc.html#abs
     */
    template<class T>
    internal::built_in_function_t<std::unique_ptr<double>, internal::abs_string, T> abs(T t) {
        return {std::tuple<T>{std::forward<T>(t)}};
    }

    /**
     *  LOWER(x) function https://sqlite.org/lang_corefunc.html#lower
     */
    template<class T>
    internal::built_in_function_t<std::string, internal::lower_string, T> lower(T t) {
        return {std::tuple<T>{std::forward<T>(t)}};
    }

    /**
     *  UPPER(x) function https://sqlite.org/lang_corefunc.html#upper
     */
    template<class T>
    internal::built_in_function_t<std::string, internal::upper_string, T> upper(T t) {
        return {std::tuple<T>{std::forward<T>(t)}};
    }

    /**
     *  LAST_INSERT_ROWID(x) function https://www.sqlite.org/lang_corefunc.html#last_insert_rowid
     */
    inline internal::built_in_function_t<int64, internal::last_insert_rowid_string> last_insert_rowid() {
        return {{}};
    }

    /**
     *  TOTAL_CHANGES() function https://sqlite.org/lang_corefunc.html#total_changes
     */
    inline internal::built_in_function_t<int, internal::total_changes_string> total_changes() {
        return {{}};
    }

    /**
     *  CHANGES() function https://sqlite.org/lang_corefunc.html#changes
     */
    inline internal::built_in_function_t<int, internal::changes_string> changes() {
        return {{}};
    }

    /**
     *  TRIM(X) function https://sqlite.org/lang_corefunc.html#trim
     */
    template<class T>
    internal::built_in_function_t<std::string, internal::trim_string, T> trim(T t) {
        return {std::tuple<T>{std::forward<T>(t)}};
    }

    /**
     *  TRIM(X,Y) function https://sqlite.org/lang_corefunc.html#trim
     */
    template<class X, class Y>
    internal::built_in_function_t<std::string, internal::trim_string, X, Y> trim(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    /**
     *  LTRIM(X) function https://sqlite.org/lang_corefunc.html#ltrim
     */
    template<class X>
    internal::built_in_function_t<std::string, internal::ltrim_string, X> ltrim(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  LTRIM(X,Y) function https://sqlite.org/lang_corefunc.html#ltrim
     */
    template<class X, class Y>
    internal::built_in_function_t<std::string, internal::ltrim_string, X, Y> ltrim(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    /**
     *  RTRIM(X) function https://sqlite.org/lang_corefunc.html#rtrim
     */
    template<class X>
    internal::built_in_function_t<std::string, internal::rtrim_string, X> rtrim(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  RTRIM(X,Y) function https://sqlite.org/lang_corefunc.html#rtrim
     */
    template<class X, class Y>
    internal::built_in_function_t<std::string, internal::rtrim_string, X, Y> rtrim(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    /**
     *  HEX(X) function https://sqlite.org/lang_corefunc.html#hex
     */
    template<class X>
    internal::built_in_function_t<std::string, internal::hex_string, X> hex(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  QUOTE(X) function https://sqlite.org/lang_corefunc.html#quote
     */
    template<class X>
    internal::built_in_function_t<std::string, internal::quote_string, X> quote(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  RANDOMBLOB(X) function https://sqlite.org/lang_corefunc.html#randomblob
     */
    template<class X>
    internal::built_in_function_t<std::vector<char>, internal::randomblob_string, X> randomblob(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  INSTR(X) function https://sqlite.org/lang_corefunc.html#instr
     */
    template<class X, class Y>
    internal::built_in_function_t<int, internal::instr_string, X, Y> instr(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    /**
     *  REPLACE(X) function https://sqlite.org/lang_corefunc.html#replace
     */
    template<class X,
             class Y,
             class Z,
             std::enable_if_t<internal::count_tuple<std::tuple<X, Y, Z>, internal::is_into>::value == 0, bool> = true>
    internal::built_in_function_t<std::string, internal::replace_string, X, Y, Z> replace(X x, Y y, Z z) {
        return {std::tuple<X, Y, Z>{std::forward<X>(x), std::forward<Y>(y), std::forward<Z>(z)}};
    }

    /**
     *  ROUND(X) function https://sqlite.org/lang_corefunc.html#round
     */
    template<class X>
    internal::built_in_function_t<double, internal::round_string, X> round(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  ROUND(X, Y) function https://sqlite.org/lang_corefunc.html#round
     */
    template<class X, class Y>
    internal::built_in_function_t<double, internal::round_string, X, Y> round(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

#if SQLITE_VERSION_NUMBER >= 3007016
    /**
     *  CHAR(X1,X2,...,XN) function https://sqlite.org/lang_corefunc.html#char
     */
    template<class... Args>
    internal::built_in_function_t<std::string, internal::char_string, Args...> char_(Args... args) {
        return {std::make_tuple(std::forward<Args>(args)...)};
    }

    /**
     *  RANDOM() function https://www.sqlite.org/lang_corefunc.html#random
     */
    inline internal::built_in_function_t<int, internal::random_string> random() {
        return {{}};
    }
#endif

    /**
     *  COALESCE(X,Y,...) function https://www.sqlite.org/lang_corefunc.html#coalesce
     */
    template<class R = void, class... Args>
    auto coalesce(Args... args)
        -> internal::built_in_function_t<typename mpl::conditional_t<  //  choose R or common type
                                             std::is_void<R>::value,
                                             std::common_type<internal::field_type_or_type_t<Args>...>,
                                             polyfill::type_identity<R>>::type,
                                         internal::coalesce_string,
                                         Args...> {
        return {std::make_tuple(std::forward<Args>(args)...)};
    }

    /**
     *  IFNULL(X,Y) function https://www.sqlite.org/lang_corefunc.html#ifnull
     */
    template<class R = void, class X, class Y>
    auto ifnull(X x, Y y) -> internal::built_in_function_t<
        typename mpl::conditional_t<  //  choose R or common type
            std::is_void<R>::value,
            std::common_type<internal::field_type_or_type_t<X>, internal::field_type_or_type_t<Y>>,
            polyfill::type_identity<R>>::type,
        internal::ifnull_string,
        X,
        Y> {
        return {std::make_tuple(std::move(x), std::move(y))};
    }

    /**
     *  NULLIF(X,Y) function https://www.sqlite.org/lang_corefunc.html#nullif
     */
#if defined(SQLITE_ORM_OPTIONAL_SUPPORTED) && defined(SQLITE_ORM_IF_CONSTEXPR_SUPPORTED)
    /**
     *  NULLIF(X,Y) using common return type of X and Y
     */
    template<class R = void,
             class X,
             class Y,
             std::enable_if_t<polyfill::disjunction_v<polyfill::negation<std::is_void<R>>,
                                                      polyfill::is_detected<std::common_type_t,
                                                                            internal::field_type_or_type_t<X>,
                                                                            internal::field_type_or_type_t<Y>>>,
                              bool> = true>
    auto nullif(X x, Y y) {
        if constexpr(std::is_void_v<R>) {
            using F = internal::built_in_function_t<
                std::optional<std::common_type_t<internal::field_type_or_type_t<X>, internal::field_type_or_type_t<Y>>>,
                internal::nullif_string,
                X,
                Y>;

            return F{std::make_tuple(std::move(x), std::move(y))};
        } else {
            using F = internal::built_in_function_t<R, internal::nullif_string, X, Y>;

            return F{std::make_tuple(std::move(x), std::move(y))};
        }
    }
#else
    template<class R, class X, class Y>
    internal::built_in_function_t<R, internal::nullif_string, X, Y> nullif(X x, Y y) {
        return {std::make_tuple(std::move(x), std::move(y))};
    }
#endif

    /**
     *  DATE(timestring, modifier, modifier, ...) function https://www.sqlite.org/lang_datefunc.html
     */
    template<class... Args>
    internal::built_in_function_t<std::string, internal::date_string, Args...> date(Args... args) {
        return {std::tuple<Args...>{std::forward<Args>(args)...}};
    }

    /**
     *  TIME(timestring, modifier, modifier, ...) function https://www.sqlite.org/lang_datefunc.html
     */
    template<class... Args>
    internal::built_in_function_t<std::string, internal::time_string, Args...> time(Args... args) {
        return {std::tuple<Args...>{std::forward<Args>(args)...}};
    }

    /**
     *  DATETIME(timestring, modifier, modifier, ...) function https://www.sqlite.org/lang_datefunc.html
     */
    template<class... Args>
    internal::built_in_function_t<std::string, internal::datetime_string, Args...> datetime(Args... args) {
        return {std::tuple<Args...>{std::forward<Args>(args)...}};
    }

    /**
     *  JULIANDAY(timestring, modifier, modifier, ...) function https://www.sqlite.org/lang_datefunc.html
     */
    template<class... Args>
    internal::built_in_function_t<double, internal::julianday_string, Args...> julianday(Args... args) {
        return {std::tuple<Args...>{std::forward<Args>(args)...}};
    }

    /**
     *  STRFTIME(timestring, modifier, modifier, ...) function https://www.sqlite.org/lang_datefunc.html
     */
    template<class... Args>
    internal::built_in_function_t<std::string, internal::strftime_string, Args...> strftime(Args... args) {
        return {std::tuple<Args...>{std::forward<Args>(args)...}};
    }

    /**
     *  ZEROBLOB(N) function https://www.sqlite.org/lang_corefunc.html#zeroblob
     */
    template<class N>
    internal::built_in_function_t<std::vector<char>, internal::zeroblob_string, N> zeroblob(N n) {
        return {std::tuple<N>{std::forward<N>(n)}};
    }

    /**
     *  SUBSTR(X,Y) function https://www.sqlite.org/lang_corefunc.html#substr
     */
    template<class X, class Y>
    internal::built_in_function_t<std::string, internal::substr_string, X, Y> substr(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    /**
     *  SUBSTR(X,Y,Z) function https://www.sqlite.org/lang_corefunc.html#substr
     */
    template<class X, class Y, class Z>
    internal::built_in_function_t<std::string, internal::substr_string, X, Y, Z> substr(X x, Y y, Z z) {
        return {std::tuple<X, Y, Z>{std::forward<X>(x), std::forward<Y>(y), std::forward<Z>(z)}};
    }

#ifdef SQLITE_SOUNDEX
    /**
     *  SOUNDEX(X) function https://www.sqlite.org/lang_corefunc.html#soundex
     */
    template<class X>
    internal::built_in_function_t<std::string, internal::soundex_string, X> soundex(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }
#endif

    /**
     *  TOTAL(X) aggregate function.
     */
    template<class X>
    internal::built_in_aggregate_function_t<double, internal::total_string, X> total(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  SUM(X) aggregate function.
     */
    template<class X>
    internal::built_in_aggregate_function_t<std::unique_ptr<double>, internal::sum_string, X> sum(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  COUNT(X) aggregate function.
     */
    template<class X>
    internal::built_in_aggregate_function_t<int, internal::count_string, X> count(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  COUNT(*) without FROM function.
     */
    inline internal::count_asterisk_without_type count() {
        return {};
    }

    /**
     *  COUNT(*) with FROM function. Specified type T will be serialized as
     *  a from argument.
     */
    template<class T>
    internal::count_asterisk_t<T> count() {
        return {};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  COUNT(*) with FROM function. Specified recordset will be serialized as
     *  a from argument.
     */
    template<orm_refers_to_recordset auto mapped>
    auto count() {
        return count<internal::auto_decay_table_ref_t<mapped>>();
    }
#endif

    /**
     *  AVG(X) aggregate function.
     */
    template<class X>
    internal::built_in_aggregate_function_t<double, internal::avg_string, X> avg(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  MAX(X) aggregate function.
     */
    template<class X>
    internal::built_in_aggregate_function_t<internal::unique_ptr_result_of<X>, internal::max_string, X> max(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  MIN(X) aggregate function.
     */
    template<class X>
    internal::built_in_aggregate_function_t<internal::unique_ptr_result_of<X>, internal::min_string, X> min(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  MAX(X, Y, ...) scalar function.
     *  The return type is the type of the first argument.
     */
    template<class X, class Y, class... Rest>
    internal::built_in_function_t<internal::unique_ptr_result_of<X>, internal::max_string, X, Y, Rest...>
    max(X x, Y y, Rest... rest) {
        return {std::tuple<X, Y, Rest...>{std::forward<X>(x), std::forward<Y>(y), std::forward<Rest>(rest)...}};
    }

    /**
     *  MIN(X, Y, ...) scalar function.
     *  The return type is the type of the first argument.
     */
    template<class X, class Y, class... Rest>
    internal::built_in_function_t<internal::unique_ptr_result_of<X>, internal::min_string, X, Y, Rest...>
    min(X x, Y y, Rest... rest) {
        return {std::tuple<X, Y, Rest...>{std::forward<X>(x), std::forward<Y>(y), std::forward<Rest>(rest)...}};
    }

    /**
     *  GROUP_CONCAT(X) aggregate function.
     */
    template<class X>
    internal::built_in_aggregate_function_t<std::string, internal::group_concat_string, X> group_concat(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    /**
     *  GROUP_CONCAT(X, Y) aggregate function.
     */
    template<class X, class Y>
    internal::built_in_aggregate_function_t<std::string, internal::group_concat_string, X, Y> group_concat(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }
#ifdef SQLITE_ENABLE_JSON1
    template<class X>
    internal::built_in_function_t<std::string, internal::json_string, X> json(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    template<class... Args>
    internal::built_in_function_t<std::string, internal::json_array_string, Args...> json_array(Args... args) {
        return {std::tuple<Args...>{std::forward<Args>(args)...}};
    }

    template<class X>
    internal::built_in_function_t<int, internal::json_array_length_string, X> json_array_length(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    template<class R, class X>
    internal::built_in_function_t<R, internal::json_array_length_string, X> json_array_length(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    template<class X, class Y>
    internal::built_in_function_t<int, internal::json_array_length_string, X, Y> json_array_length(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    template<class R, class X, class Y>
    internal::built_in_function_t<R, internal::json_array_length_string, X, Y> json_array_length(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    template<class R, class X, class... Args>
    internal::built_in_function_t<R, internal::json_extract_string, X, Args...> json_extract(X x, Args... args) {
        return {std::tuple<X, Args...>{std::forward<X>(x), std::forward<Args>(args)...}};
    }

    template<class X, class... Args>
    internal::built_in_function_t<std::string, internal::json_insert_string, X, Args...> json_insert(X x,
                                                                                                     Args... args) {
        static_assert(std::tuple_size<std::tuple<Args...>>::value % 2 == 0,
                      "number of arguments in json_insert must be odd");
        return {std::tuple<X, Args...>{std::forward<X>(x), std::forward<Args>(args)...}};
    }

    template<class X, class... Args>
    internal::built_in_function_t<std::string, internal::json_replace_string, X, Args...> json_replace(X x,
                                                                                                       Args... args) {
        static_assert(std::tuple_size<std::tuple<Args...>>::value % 2 == 0,
                      "number of arguments in json_replace must be odd");
        return {std::tuple<X, Args...>{std::forward<X>(x), std::forward<Args>(args)...}};
    }

    template<class X, class... Args>
    internal::built_in_function_t<std::string, internal::json_set_string, X, Args...> json_set(X x, Args... args) {
        static_assert(std::tuple_size<std::tuple<Args...>>::value % 2 == 0,
                      "number of arguments in json_set must be odd");
        return {std::tuple<X, Args...>{std::forward<X>(x), std::forward<Args>(args)...}};
    }

    template<class... Args>
    internal::built_in_function_t<std::string, internal::json_object_string, Args...> json_object(Args... args) {
        static_assert(std::tuple_size<std::tuple<Args...>>::value % 2 == 0,
                      "number of arguments in json_object must be even");
        return {std::tuple<Args...>{std::forward<Args>(args)...}};
    }

    template<class X, class Y>
    internal::built_in_function_t<std::string, internal::json_patch_string, X, Y> json_patch(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    template<class X, class... Args>
    internal::built_in_function_t<std::string, internal::json_remove_string, X, Args...> json_remove(X x,
                                                                                                     Args... args) {
        return {std::tuple<X, Args...>{std::forward<X>(x), std::forward<Args>(args)...}};
    }

    template<class R, class X, class... Args>
    internal::built_in_function_t<R, internal::json_remove_string, X, Args...> json_remove(X x, Args... args) {
        return {std::tuple<X, Args...>{std::forward<X>(x), std::forward<Args>(args)...}};
    }

    template<class X>
    internal::built_in_function_t<std::string, internal::json_type_string, X> json_type(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    template<class R, class X>
    internal::built_in_function_t<R, internal::json_type_string, X> json_type(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    template<class X, class Y>
    internal::built_in_function_t<std::string, internal::json_type_string, X, Y> json_type(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    template<class R, class X, class Y>
    internal::built_in_function_t<R, internal::json_type_string, X, Y> json_type(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }

    template<class X>
    internal::built_in_function_t<bool, internal::json_valid_string, X> json_valid(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    template<class R, class X>
    internal::built_in_function_t<R, internal::json_quote_string, X> json_quote(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    template<class X>
    internal::built_in_function_t<std::string, internal::json_group_array_string, X> json_group_array(X x) {
        return {std::tuple<X>{std::forward<X>(x)}};
    }

    template<class X, class Y>
    internal::built_in_function_t<std::string, internal::json_group_object_string, X, Y> json_group_object(X x, Y y) {
        return {std::tuple<X, Y>{std::forward<X>(x), std::forward<Y>(y)}};
    }
#endif  //  SQLITE_ENABLE_JSON1

    // Intentionally place operators for types classified as arithmetic or general operator arguments in the internal namespace
    // to facilitate ADL (Argument Dependent Lookup)
    namespace internal {
        template<class L,
                 class R,
                 std::enable_if_t<polyfill::disjunction<std::is_base_of<arithmetic_t, L>,
                                                        std::is_base_of<arithmetic_t, R>,
                                                        is_operator_argument<L>,
                                                        is_operator_argument<R>>::value,
                                  bool> = true>
        add_t<unwrap_expression_t<L>, unwrap_expression_t<R>> operator+(L l, R r) {
            return {get_from_expression(std::forward<L>(l)), get_from_expression(std::forward<R>(r))};
        }

        template<class L,
                 class R,
                 std::enable_if_t<polyfill::disjunction<std::is_base_of<arithmetic_t, L>,
                                                        std::is_base_of<arithmetic_t, R>,
                                                        is_operator_argument<L>,
                                                        is_operator_argument<R>>::value,
                                  bool> = true>
        sub_t<unwrap_expression_t<L>, unwrap_expression_t<R>> operator-(L l, R r) {
            return {get_from_expression(std::forward<L>(l)), get_from_expression(std::forward<R>(r))};
        }

        template<class L,
                 class R,
                 std::enable_if_t<polyfill::disjunction<std::is_base_of<arithmetic_t, L>,
                                                        std::is_base_of<arithmetic_t, R>,
                                                        is_operator_argument<L>,
                                                        is_operator_argument<R>>::value,
                                  bool> = true>
        mul_t<unwrap_expression_t<L>, unwrap_expression_t<R>> operator*(L l, R r) {
            return {get_from_expression(std::forward<L>(l)), get_from_expression(std::forward<R>(r))};
        }

        template<class L,
                 class R,
                 std::enable_if_t<polyfill::disjunction<std::is_base_of<arithmetic_t, L>,
                                                        std::is_base_of<arithmetic_t, R>,
                                                        is_operator_argument<L>,
                                                        is_operator_argument<R>>::value,
                                  bool> = true>
        div_t<unwrap_expression_t<L>, unwrap_expression_t<R>> operator/(L l, R r) {
            return {get_from_expression(std::forward<L>(l)), get_from_expression(std::forward<R>(r))};
        }

        template<class L,
                 class R,
                 std::enable_if_t<polyfill::disjunction<std::is_base_of<arithmetic_t, L>,
                                                        std::is_base_of<arithmetic_t, R>,
                                                        is_operator_argument<L>,
                                                        is_operator_argument<R>>::value,
                                  bool> = true>
        mod_t<unwrap_expression_t<L>, unwrap_expression_t<R>> operator%(L l, R r) {
            return {get_from_expression(std::forward<L>(l)), get_from_expression(std::forward<R>(r))};
        }
    }

    template<class T, class X, class Y, class Z>
    internal::highlight_t<T, X, Y, Z> highlight(X x, Y y, Z z) {
        return {std::move(x), std::move(y), std::move(z)};
    }
}
#pragma once

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
#include <concepts>
#endif
#include <type_traits>  //  std::remove_const
#include <string>  //  std::string
#include <utility>  //  std::move
#include <tuple>  //  std::tuple, std::get, std::tuple_size
// #include "functional/cxx_optional.h"

// #include "functional/cxx_universal.h"
//  ::size_t
// #include "functional/cxx_type_traits_polyfill.h"

// #include "is_base_of_template.h"

// #include "tuple_helper/tuple_traits.h"

// #include "tuple_helper/tuple_transformer.h"

#include <type_traits>  //  std::remove_reference, std::common_type, std::index_sequence, std::make_index_sequence, std::forward, std::move, std::integral_constant, std::declval
#include <tuple>  //  std::tuple_size, std::get

// #include "../functional/cxx_universal.h"
//  ::size_t
// #include "../functional/cxx_type_traits_polyfill.h"

// #include "../functional/cxx_functional_polyfill.h"

// #include "../functional/mpl.h"

namespace sqlite_orm {
    namespace internal {

        template<class Pack, template<class...> class Op>
        struct tuple_transformer;

        template<template<class...> class Pack, class... Types, template<class...> class Op>
        struct tuple_transformer<Pack<Types...>, Op> {
            using type = Pack<mpl::invoke_fn_t<Op, Types>...>;
        };

        /*
         *  Transform specified tuple.
         *  
         *  `Op` is a metafunction.
         */
        template<class Pack, template<class...> class Op>
        using transform_tuple_t = typename tuple_transformer<Pack, Op>::type;

        //  note: applying a combiner like `plus_fold_integrals` needs fold expressions
#if defined(SQLITE_ORM_FOLD_EXPRESSIONS_SUPPORTED)
        /*
         *  Apply a projection to a tuple's elements filtered by the specified indexes, and combine the results.
         *  
         *  @note It's a glorified version of `std::apply()` and a variant of `std::accumulate()`.
         *  It combines filtering the tuple (indexes), transforming the elements (projection) and finally applying the callable (combine).
         *  
         *  @note `project` is called using `std::invoke`, which is `constexpr` since C++20.
         */
        template<class CombineOp, class Tpl, size_t... Idx, class Projector, class Init>
        SQLITE_ORM_CONSTEXPR_CPP20 auto recombine_tuple(CombineOp combine,
                                                        const Tpl& tpl,
                                                        std::index_sequence<Idx...>,
                                                        Projector project,
                                                        Init initial) {
            return combine(initial, polyfill::invoke(project, std::get<Idx>(tpl))...);
        }

        /*
         *  Apply a projection to a tuple's elements, and combine the results.
         *  
         *  @note It's a glorified version of `std::apply()` and a variant of `std::accumulate()`.
         *  It combines filtering the tuple (indexes), transforming the elements (projection) and finally applying the callable (combine).
         *  
         *  @note `project` is called using `std::invoke`, which is `constexpr` since C++20.
         */
        template<class CombineOp, class Tpl, class Projector, class Init>
        SQLITE_ORM_CONSTEXPR_CPP20 auto
        recombine_tuple(CombineOp combine, const Tpl& tpl, Projector project, Init initial) {
            return recombine_tuple(std::move(combine),
                                   std::forward<decltype(tpl)>(tpl),
                                   std::make_index_sequence<std::tuple_size<Tpl>::value>{},
                                   std::move(project),
                                   std::move(initial));
        }

        /*
         *  Function object that takes integral constants and returns the sum of their values as an integral constant.
         *  Because it's a "transparent" functor, it must be called with at least one argument, otherwise it cannot deduce the integral constant type.
         */
        struct plus_fold_integrals {
            template<class... Integrals>
            constexpr auto operator()(const Integrals&...) const {
                using integral_type = std::common_type_t<typename Integrals::value_type...>;
                return std::integral_constant<integral_type, (Integrals::value + ...)>{};
            }
        };

        /*
         *  Function object that takes a type, applies a projection on it, and returns the tuple size of the projected type (as an integral constant).
         *  The projection is applied on the argument type, not the argument value/object.
         */
        template<template<class...> class NestedProject>
        struct project_nested_tuple_size {
            template<class T>
            constexpr auto operator()(const T&) const {
                return typename std::tuple_size<NestedProject<T>>::type{};
            }
        };

        template<template<class...> class NestedProject, class Tpl, class IdxSeq>
        using nested_tuple_size_for_t = decltype(recombine_tuple(plus_fold_integrals{},
                                                                 std::declval<Tpl>(),
                                                                 IdxSeq{},
                                                                 project_nested_tuple_size<NestedProject>{},
                                                                 std::integral_constant<size_t, 0u>{}));
#endif

        template<class R, class Tpl, size_t... Idx, class Projection = polyfill::identity>
        constexpr R create_from_tuple(Tpl&& tpl, std::index_sequence<Idx...>, Projection project = {}) {
            return R{polyfill::invoke(project, std::get<Idx>(std::forward<Tpl>(tpl)))...};
        }

        /*
         *  Like `std::make_from_tuple`, but using a projection on the tuple elements.
         */
        template<class R, class Tpl, class Projection = polyfill::identity>
        constexpr R create_from_tuple(Tpl&& tpl, Projection project = {}) {
            return create_from_tuple<R>(
                std::forward<Tpl>(tpl),
                std::make_index_sequence<std::tuple_size<std::remove_reference_t<Tpl>>::value>{},
                std::forward<Projection>(project));
        }
    }
}

// #include "tuple_helper/tuple_iteration.h"

#include <tuple>  //  std::get, std::tuple_element, std::tuple_size
#include <type_traits>  //  std::index_sequence, std::make_index_sequence
#include <utility>  //  std::forward, std::move

// #include "../functional/cxx_universal.h"
//  ::size_t

namespace sqlite_orm {
    namespace internal {
#if defined(SQLITE_ORM_FOLD_EXPRESSIONS_SUPPORTED) && defined(SQLITE_ORM_IF_CONSTEXPR_SUPPORTED)
        template<bool reversed = false, class Tpl, size_t... Idx, class L>
        void iterate_tuple(Tpl& tpl, std::index_sequence<Idx...>, L&& lambda) {
            if constexpr(reversed) {
                // nifty fold expression trick: make use of guaranteed right-to-left evaluation order when folding over operator=
                int sink;
                // note: `(void)` cast silences warning 'expression result unused'
                (void)((lambda(std::get<Idx>(tpl)), sink) = ... = 0);
            } else {
                (lambda(std::get<Idx>(tpl)), ...);
            }
        }
#else
        template<bool reversed = false, class Tpl, class L>
        void iterate_tuple(Tpl& /*tpl*/, std::index_sequence<>, L&& /*lambda*/) {}

        template<bool reversed = false, class Tpl, size_t I, size_t... Idx, class L>
        void iterate_tuple(Tpl& tpl, std::index_sequence<I, Idx...>, L&& lambda) {
            if SQLITE_ORM_CONSTEXPR_IF(reversed) {
                iterate_tuple<reversed>(tpl, std::index_sequence<Idx...>{}, std::forward<L>(lambda));
                lambda(std::get<I>(tpl));
            } else {
                lambda(std::get<I>(tpl));
                iterate_tuple<reversed>(tpl, std::index_sequence<Idx...>{}, std::forward<L>(lambda));
            }
        }
#endif
        template<bool reversed = false, class Tpl, class L>
        void iterate_tuple(Tpl&& tpl, L&& lambda) {
            iterate_tuple<reversed>(tpl,
                                    std::make_index_sequence<std::tuple_size<std::remove_reference_t<Tpl>>::value>{},
                                    std::forward<L>(lambda));
        }

#ifdef SQLITE_ORM_FOLD_EXPRESSIONS_SUPPORTED
        template<class Tpl, size_t... Idx, class L>
        void iterate_tuple(std::index_sequence<Idx...>, L&& lambda) {
            (lambda((std::tuple_element_t<Idx, Tpl>*)nullptr), ...);
        }
#else
        template<class Tpl, size_t... Idx, class L>
        void iterate_tuple(std::index_sequence<Idx...>, L&& lambda) {
            using Sink = int[sizeof...(Idx)];
            (void)Sink{(lambda((std::tuple_element_t<Idx, Tpl>*)nullptr), 0)...};
        }
#endif
        template<class Tpl, class L>
        void iterate_tuple(L&& lambda) {
            iterate_tuple<Tpl>(std::make_index_sequence<std::tuple_size<Tpl>::value>{}, std::forward<L>(lambda));
        }

        template<template<class...> class Base, class L>
        struct lambda_as_template_base : L {
#ifndef SQLITE_ORM_AGGREGATE_BASES_SUPPORTED
            lambda_as_template_base(L&& lambda) : L{std::move(lambda)} {}
#endif
            template<class... T>
            decltype(auto) operator()(const Base<T...>& object) {
                return L::operator()(object);
            }
        };

        /*
         *  This method wraps the specified callable in another function object,
         *  which in turn implicitly casts its single argument to the specified template base class,
         *  then passes the converted argument to the lambda.
         *  
         *  Note: This method is useful for reducing combinatorial instantiation of template lambdas,
         *  as long as this library supports compilers that do not implement
         *  explicit template parameters in generic lambdas [SQLITE_ORM_EXPLICIT_GENERIC_LAMBDA_SUPPORTED].
         *  Unfortunately it doesn't work with user-defined conversion operators in order to extract
         *  parts of a class. In other words, the destination type must be a direct template base class.
         */
        template<template<class...> class Base, class L>
        lambda_as_template_base<Base, L> call_as_template_base(L lambda) {
            return {std::move(lambda)};
        }
    }
}

// #include "optional_container.h"

// #include "ast/where.h"

#include <type_traits>  //  std::false_type, std::true_type
#include <utility>  //  std::move

// #include "../functional/cxx_universal.h"

// #include "../functional/cxx_type_traits_polyfill.h"

// #include "../serialize_result_type.h"

namespace sqlite_orm {
    namespace internal {

        struct where_string {
            serialize_result_type serialize() const {
                return "WHERE";
            }
        };

        /**
         *  WHERE argument holder.
         *  C is expression type. Can be any expression like: is_equal_t, is_null_t, exists_t etc
         *  Don't construct it manually. Call `where(...)` function instead.
         */
        template<class C>
        struct where_t : where_string {
            using expression_type = C;

            expression_type expression;

            where_t(expression_type expression_) : expression(std::move(expression_)) {}
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_where_v = polyfill::is_specialization_of<T, where_t>::value;

        template<class T>
        struct is_where : polyfill::bool_constant<is_where_v<T>> {};
    }

    /**
     *  WHERE clause. Use it to add WHERE conditions wherever you like.
     *  C is expression type. Can be any expression like: is_equal_t, is_null_t, exists_t etc
     *  @example
     *  //  SELECT name
     *  //  FROM letters
     *  //  WHERE id > 3
     *  auto rows = storage.select(&Letter::name, where(greater_than(&Letter::id, 3)));
     */
    template<class C>
    internal::where_t<C> where(C expression) {
        return {std::move(expression)};
    }
}

// #include "ast/group_by.h"

#include <tuple>  //  std::tuple, std::make_tuple
#include <type_traits>  //  std::true_type, std::false_type
#include <utility>  //  std::forward, std::move

// #include "../functional/cxx_type_traits_polyfill.h"

namespace sqlite_orm {
    namespace internal {

        template<class T, class... Args>
        struct group_by_with_having {
            using args_type = std::tuple<Args...>;
            using expression_type = T;

            args_type args;
            expression_type expression;
        };

        /**
         *  GROUP BY pack holder.
         */
        template<class... Args>
        struct group_by_t {
            using args_type = std::tuple<Args...>;

            args_type args;

            template<class T>
            group_by_with_having<T, Args...> having(T expression) {
                return {std::move(this->args), std::move(expression)};
            }
        };

        template<class T>
        using is_group_by = polyfill::disjunction<polyfill::is_specialization_of<T, group_by_t>,
                                                  polyfill::is_specialization_of<T, group_by_with_having>>;
    }

    /**
     *  GROUP BY column.
     *  Example: storage.get_all<Employee>(group_by(&Employee::name))
     */
    template<class... Args>
    internal::group_by_t<Args...> group_by(Args... args) {
        return {{std::forward<Args>(args)...}};
    }
}

// #include "core_functions.h"

// #include "alias_traits.h"

// #include "cte_moniker.h"

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
#include <concepts>
#include <utility>  //  std::make_index_sequence
#endif
#include <type_traits>  //  std::enable_if, std::is_member_pointer, std::is_same, std::is_convertible
#include <tuple>  //  std::ignore
#include <string>
#endif

// #include "functional/cxx_universal.h"

// #include "functional/cstring_literal.h"

// #include "alias.h"

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
namespace sqlite_orm {

    namespace internal {
        /** 
         *  A special record set alias that is both, a storage lookup type (mapping type) and an alias.
         */
        template<char A, char... X>
        struct cte_moniker
            : recordset_alias<
                  cte_moniker<A, X...> /* refer to self, since a moniker is both, an alias and a mapped type */,
                  A,
                  X...> {
            /** 
             *  Introduce the construction of a common table expression using this moniker.
             *  
             *  The list of explicit columns is optional;
             *  if provided the number of columns must match the number of columns of the subselect.
             *  The column names will be merged with the subselect:
             *  1. column names of subselect
             *  2. explicit columns
             *  3. fill in empty column names with column index
             *  
             *  Example:
             *  1_ctealias()(select(&Object::id));
             *  1_ctealias(&Object::name)(select("object"));
             *  
             *  @return A `cte_builder` instance.
             *  @note (internal): Defined in select_constraints.h in order to keep this member function in the same place as the named factory function `cte()`,
             *  and to keep the actual creation of the builder in one place.
             */
#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
            template<class... ExplicitCols>
                requires((is_column_alias_v<ExplicitCols> || std::is_member_pointer_v<ExplicitCols> ||
                          std::same_as<ExplicitCols, std::remove_cvref_t<decltype(std::ignore)>> ||
                          std::convertible_to<ExplicitCols, std::string>) &&
                         ...)
            auto operator()(ExplicitCols... explicitColumns) const;
#else
            template<class... ExplicitCols,
                     std::enable_if_t<polyfill::conjunction_v<polyfill::disjunction<
                                          is_column_alias<ExplicitCols>,
                                          std::is_member_pointer<ExplicitCols>,
                                          std::is_same<ExplicitCols, polyfill::remove_cvref_t<decltype(std::ignore)>>,
                                          std::is_convertible<ExplicitCols, std::string>>...>,
                                      bool> = true>
            auto operator()(ExplicitCols... explicitColumns) const;
#endif
        };
    }

    inline namespace literals {
        /**
         *  cte_moniker<'n'> from a numeric literal.
         *  E.g. 1_ctealias, 2_ctealias
         */
        template<char... Chars>
        [[nodiscard]] SQLITE_ORM_CONSTEVAL auto operator"" _ctealias() {
            return internal::cte_moniker<Chars...>{};
        }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        /**
         *  cte_moniker<'1'[, ...]> from a string literal.
         *  E.g. "1"_cte, "2"_cte
         */
        template<internal::cstring_literal moniker>
        [[nodiscard]] consteval auto operator"" _cte() {
            return internal::explode_into<internal::cte_moniker, moniker>(std::make_index_sequence<moniker.size()>{});
        }
#endif
    }
}
#endif

namespace sqlite_orm {

    namespace internal {
#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
        template<class T>
        struct as_optional_t {
            using value_type = T;

            value_type value;
        };
#endif  //  SQLITE_ORM_OPTIONAL_SUPPORTED

        struct distinct_string {
            operator std::string() const {
                return "DISTINCT";
            }
        };

        /**
         *  DISCTINCT generic container.
         */
        template<class T>
        struct distinct_t : distinct_string {
            using value_type = T;

            value_type value;

            distinct_t(value_type value_) : value(std::move(value_)) {}
        };

        struct all_string {
            operator std::string() const {
                return "ALL";
            }
        };

        /**
         *  ALL generic container.
         */
        template<class T>
        struct all_t : all_string {
            T value;

            all_t(T value_) : value(std::move(value_)) {}
        };

        template<class... Args>
        struct columns_t {
            using columns_type = std::tuple<Args...>;

            columns_type columns;
            bool distinct = false;

            static constexpr int count = std::tuple_size<columns_type>::value;

#ifndef SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
            columns_t(columns_type columns) : columns{std::move(columns)} {}
#endif
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_columns_v = polyfill::is_specialization_of<T, columns_t>::value;

        template<class T>
        using is_columns = polyfill::bool_constant<is_columns_v<T>>;

        /*
         *  Captures the type of an aggregate/structure/object and column expressions, such that
         *  `T` can be constructed in-place as part of a result row.
         *  `T` must be constructible using direct-list-initialization.
         */
        template<class T, class... Args>
        struct struct_t {
            using columns_type = std::tuple<Args...>;

            columns_type columns;
            bool distinct = false;

            static constexpr int count = std::tuple_size<columns_type>::value;

#ifndef SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
            struct_t(columns_type columns) : columns{std::move(columns)} {}
#endif
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_struct_v = polyfill::is_specialization_of<T, struct_t>::value;

        template<class T>
        using is_struct = polyfill::bool_constant<is_struct_v<T>>;

        /**
         *  Subselect object type.
         */
        template<class T, class... Args>
        struct select_t {
            using return_type = T;
            using conditions_type = std::tuple<Args...>;

            return_type col;
            conditions_type conditions;
            bool highest_level = false;

#ifndef SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
            select_t(return_type col, conditions_type conditions) :
                col{std::move(col)}, conditions{std::move(conditions)} {}
#endif
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_select_v = polyfill::is_specialization_of<T, select_t>::value;

        template<class T>
        using is_select = polyfill::bool_constant<is_select_v<T>>;

        /**
         *  Base for UNION, UNION ALL, EXCEPT and INTERSECT
         */
        template<class... E>
        struct compound_operator {
            using expressions_tuple = std::tuple<E...>;

            expressions_tuple compound;

            compound_operator(expressions_tuple compound) : compound{std::move(compound)} {
                iterate_tuple(this->compound, [](auto& expression) {
                    expression.highest_level = true;
                });
            }
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_compound_operator_v = is_base_of_template<T, compound_operator>::value;

        template<class T>
        using is_compound_operator = polyfill::bool_constant<is_compound_operator_v<T>>;

        struct union_base {
            bool all = false;

#ifndef SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
            union_base(bool all) : all{all} {}
#endif

            operator std::string() const {
                if(!this->all) {
                    return "UNION";
                } else {
                    return "UNION ALL";
                }
            }
        };

        /**
         *  UNION object type.
         */
        template<class... E>
        struct union_t : public compound_operator<E...>, union_base {
            using typename compound_operator<E...>::expressions_tuple;

            union_t(expressions_tuple compound, bool all) :
                compound_operator<E...>{std::move(compound)}, union_base{all} {}
        };

        struct except_string {
            operator std::string() const {
                return "EXCEPT";
            }
        };

        /**
         *  EXCEPT object type.
         */
        template<class... E>
        struct except_t : compound_operator<E...>, except_string {
            using super = compound_operator<E...>;

            using super::super;
        };

        struct intersect_string {
            operator std::string() const {
                return "INTERSECT";
            }
        };
        /**
         *  INTERSECT object type.
         */
        template<class... E>
        struct intersect_t : compound_operator<E...>, intersect_string {
            using super = compound_operator<E...>;

            using super::super;
        };

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
        /*
         *  Turn explicit columns for a CTE into types that the CTE backend understands
         */
        template<class T, class SFINAE = void>
        struct decay_explicit_column {
            using type = T;
        };
        template<class T>
        struct decay_explicit_column<T, match_if<is_column_alias, T>> {
            using type = alias_holder<T>;
        };
        template<class T>
        struct decay_explicit_column<T, match_if<std::is_convertible, T, std::string>> {
            using type = std::string;
        };
        template<class T>
        using decay_explicit_column_t = typename decay_explicit_column<T>::type;

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        /*
         *  Materialization hint to instruct SQLite to materialize the select statement of a CTE into an ephemeral table as an "optimization fence".
         */
        struct materialized_t {};

        /*
         *  Materialization hint to instruct SQLite to substitute a CTE's select statement as a subquery subject to optimization.
         */
        struct not_materialized_t {};
#endif

        /**
         *  Monikered (aliased) CTE expression.
         */
        template<class Moniker, class ExplicitCols, class Hints, class Select>
        struct common_table_expression {
            using cte_moniker_type = Moniker;
            using expression_type = Select;
            using explicit_colrefs_tuple = ExplicitCols;
            using hints_tuple = Hints;
            static constexpr size_t explicit_colref_count = std::tuple_size_v<ExplicitCols>;

            SQLITE_ORM_NOUNIQUEADDRESS hints_tuple hints;
            explicit_colrefs_tuple explicitColumns;
            expression_type subselect;

            common_table_expression(explicit_colrefs_tuple explicitColumns, expression_type subselect) :
                explicitColumns{std::move(explicitColumns)}, subselect{std::move(subselect)} {
                this->subselect.highest_level = true;
            }
        };

        template<class... CTEs>
        using common_table_expressions = std::tuple<CTEs...>;

        template<typename Moniker, class ExplicitCols>
        struct cte_builder {
            ExplicitCols explicitColumns;

#if SQLITE_VERSION_NUMBER >= 3035000 && defined(SQLITE_ORM_WITH_CPP20_ALIASES)
            template<auto... hints, class Select, satisfies<is_select, Select> = true>
            common_table_expression<Moniker, ExplicitCols, std::tuple<decltype(hints)...>, Select> as(Select sel) && {
                return {std::move(this->explicitColumns), std::move(sel)};
            }

            template<auto... hints, class Compound, satisfies<is_compound_operator, Compound> = true>
            common_table_expression<Moniker, ExplicitCols, std::tuple<decltype(hints)...>, select_t<Compound>>
            as(Compound sel) && {
                return {std::move(this->explicitColumns), {std::move(sel)}};
            }
#else
            template<class Select, satisfies<is_select, Select> = true>
            common_table_expression<Moniker, ExplicitCols, std::tuple<>, Select> as(Select sel) && {
                return {std::move(this->explicitColumns), std::move(sel)};
            }

            template<class Compound, satisfies<is_compound_operator, Compound> = true>
            common_table_expression<Moniker, ExplicitCols, std::tuple<>, select_t<Compound>> as(Compound sel) && {
                return {std::move(this->explicitColumns), {std::move(sel)}};
            }
#endif
        };

        /**
         *  WITH object type - expression with prepended CTEs.
         */
        template<class E, class... CTEs>
        struct with_t {
            using cte_type = common_table_expressions<CTEs...>;
            using expression_type = E;

            bool recursiveIndicated;
            cte_type cte;
            expression_type expression;

            with_t(bool recursiveIndicated, cte_type cte, expression_type expression) :
                recursiveIndicated{recursiveIndicated}, cte{std::move(cte)}, expression{std::move(expression)} {
                if constexpr(is_select_v<expression_type>) {
                    this->expression.highest_level = true;
                }
            }
        };
#endif

        /**
         *  Generic way to get DISTINCT value from any type.
         */
        template<class T>
        bool get_distinct(const T&) {
            return false;
        }

        template<class... Args>
        bool get_distinct(const columns_t<Args...>& cols) {
            return cols.distinct;
        }

        template<class T, class... Args>
        bool get_distinct(const struct_t<T, Args...>& cols) {
            return cols.distinct;
        }

        template<class T>
        struct asterisk_t {
            using type = T;

            bool defined_order = false;

#ifndef SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
            asterisk_t(bool definedOrder) : defined_order{definedOrder} {}
#endif
        };

        template<class T>
        struct object_t {
            using type = T;

            bool defined_order = false;

#ifndef SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
            object_t(bool definedOrder) : defined_order{definedOrder} {}
#endif
        };

        template<class T>
        struct then_t {
            using expression_type = T;

            expression_type expression;
        };

        template<class R, class T, class E, class... Args>
        struct simple_case_t {
            using return_type = R;
            using case_expression_type = T;
            using args_type = std::tuple<Args...>;
            using else_expression_type = E;

            optional_container<case_expression_type> case_expression;
            args_type args;
            optional_container<else_expression_type> else_expression;
        };

        /**
         *  T is a case expression type
         *  E is else type (void is ELSE is omitted)
         *  Args... is a pack of WHEN expressions
         */
        template<class R, class T, class E, class... Args>
        struct simple_case_builder {
            using return_type = R;
            using case_expression_type = T;
            using args_type = std::tuple<Args...>;
            using else_expression_type = E;

            optional_container<case_expression_type> case_expression;
            args_type args;
            optional_container<else_expression_type> else_expression;

            template<class W, class Th>
            simple_case_builder<R, T, E, Args..., std::pair<W, Th>> when(W w, then_t<Th> t) {
                using result_args_type = std::tuple<Args..., std::pair<W, Th>>;
                std::pair<W, Th> newPair{std::move(w), std::move(t.expression)};
                result_args_type result_args = std::tuple_cat(std::move(this->args), std::make_tuple(newPair));
                std::get<std::tuple_size<result_args_type>::value - 1>(result_args) = std::move(newPair);
                return {std::move(this->case_expression), std::move(result_args), std::move(this->else_expression)};
            }

            simple_case_t<R, T, E, Args...> end() {
                return {std::move(this->case_expression), std::move(args), std::move(this->else_expression)};
            }

            template<class El>
            simple_case_builder<R, T, El, Args...> else_(El el) {
                return {{std::move(this->case_expression)}, std::move(args), {std::move(el)}};
            }
        };

        template<class T>
        void validate_conditions() {
            static_assert(count_tuple<T, is_where>::value <= 1, "a single query cannot contain > 1 WHERE blocks");
            static_assert(count_tuple<T, is_group_by>::value <= 1, "a single query cannot contain > 1 GROUP BY blocks");
            static_assert(count_tuple<T, is_order_by>::value <= 1, "a single query cannot contain > 1 ORDER BY blocks");
            static_assert(count_tuple<T, is_limit>::value <= 1, "a single query cannot contain > 1 LIMIT blocks");
            static_assert(count_tuple<T, is_from>::value <= 1, "a single query cannot contain > 1 FROM blocks");
        }
    }

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
    template<class T>
    internal::as_optional_t<T> as_optional(T value) {
        return {std::move(value)};
    }
#endif  //  SQLITE_ORM_OPTIONAL_SUPPORTED
    template<class T>
    internal::then_t<T> then(T t) {
        return {std::move(t)};
    }

    template<class R, class T>
    internal::simple_case_builder<R, T, void> case_(T t) {
        return {{std::move(t)}};
    }

    template<class R>
    internal::simple_case_builder<R, void, void> case_() {
        return {};
    }

    template<class T>
    internal::distinct_t<T> distinct(T t) {
        return {std::move(t)};
    }

    template<class T>
    internal::all_t<T> all(T t) {
        return {std::move(t)};
    }

    template<class... Args>
    internal::columns_t<Args...> distinct(internal::columns_t<Args...> cols) {
        cols.distinct = true;
        return cols;
    }

    /*
     *  Combine multiple columns in a tuple.
     */
    template<class... Args>
    constexpr internal::columns_t<Args...> columns(Args... args) {
        return {std::make_tuple<Args...>(std::forward<Args>(args)...)};
    }

    /*
     *  Construct an unmapped structure ad-hoc from multiple columns.
     *  `T` must be constructible from the column results using direct-list-initialization.
     */
    template<class T, class... Args>
    constexpr internal::struct_t<T, Args...> struct_(Args... args) {
        return {std::make_tuple<Args...>(std::forward<Args>(args)...)};
    }

    /**
     *  Public function for subselect query. Is useful in UNION queries.
     */
    template<class T, class... Args>
    internal::select_t<T, Args...> select(T t, Args... args) {
        using args_tuple = std::tuple<Args...>;
        internal::validate_conditions<args_tuple>();
        return {std::move(t), {std::forward<Args>(args)...}};
    }

    /**
     *  Public function for UNION operator.
     *  Expressions are subselect objects.
     *  Look through example in examples/union.cpp
     */
    template<class... E>
    internal::union_t<E...> union_(E... expressions) {
        static_assert(sizeof...(E) >= 2, "Compound operators must have at least 2 select statements");
        return {{std::forward<E>(expressions)...}, false};
    }

    /**
     *  Public function for UNION ALL operator.
     *  Expressions are subselect objects.
     *  Look through example in examples/union.cpp
     */
    template<class... E>
    internal::union_t<E...> union_all(E... expressions) {
        static_assert(sizeof...(E) >= 2, "Compound operators must have at least 2 select statements");
        return {{std::forward<E>(expressions)...}, true};
    }

    /**
     *  Public function for EXCEPT operator.
     *  Expressions are subselect objects.
     *  Look through example in examples/except.cpp
     */
    template<class... E>
    internal::except_t<E...> except(E... expressions) {
        static_assert(sizeof...(E) >= 2, "Compound operators must have at least 2 select statements");
        return {{std::forward<E>(expressions)...}};
    }

    template<class... E>
    internal::intersect_t<E...> intersect(E... expressions) {
        static_assert(sizeof...(E) >= 2, "Compound operators must have at least 2 select statements");
        return {{std::forward<E>(expressions)...}};
    }

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
#if SQLITE_VERSION_NUMBER >= 3035003
#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /*
     *  Materialization hint to instruct SQLite to materialize the select statement of a CTE into an ephemeral table as an "optimization fence".
     *  
     *  Example:
     *  1_ctealias().as<materialized()>(select(1));
     */
    inline consteval internal::materialized_t materialized() {
        return {};
    }

    /*
     *  Materialization hint to instruct SQLite to substitute a CTE's select statement as a subquery subject to optimization.
     *  
     *  Example:
     *  1_ctealias().as<not_materialized()>(select(1));
     */
    inline consteval internal::not_materialized_t not_materialized() {
        return {};
    }
#endif
#endif

    /**
     *  Introduce the construction of a common table expression using the specified moniker.
     *  
     *  The list of explicit columns is optional;
     *  if provided the number of columns must match the number of columns of the subselect.
     *  The column names will be merged with the subselect:
     *  1. column names of subselect
     *  2. explicit columns
     *  3. fill in empty column names with column index
     *  
     *  Example:
     *  using cte_1 = decltype(1_ctealias);
     *  cte<cte_1>()(select(&Object::id));
     *  cte<cte_1>(&Object::name)(select("object"));
     */
    template<class Moniker,
             class... ExplicitCols,
             std::enable_if_t<polyfill::conjunction_v<polyfill::disjunction<
                                  internal::is_column_alias<ExplicitCols>,
                                  std::is_member_pointer<ExplicitCols>,
                                  internal::is_column<ExplicitCols>,
                                  std::is_same<ExplicitCols, polyfill::remove_cvref_t<decltype(std::ignore)>>,
                                  std::is_convertible<ExplicitCols, std::string>>...>,
                              bool> = true>
    auto cte(ExplicitCols... explicitColumns) {
        using namespace ::sqlite_orm::internal;
        static_assert(is_cte_moniker_v<Moniker>, "Moniker must be a CTE moniker");
        static_assert((!is_builtin_numeric_column_alias_v<ExplicitCols> && ...),
                      "Numeric column aliases are reserved for referencing columns locally within a single CTE.");

        using builder_type =
            cte_builder<Moniker, transform_tuple_t<std::tuple<ExplicitCols...>, decay_explicit_column_t>>;
        return builder_type{{std::move(explicitColumns)...}};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    template<orm_cte_moniker auto moniker, class... ExplicitCols>
        requires((internal::is_column_alias_v<ExplicitCols> || std::is_member_pointer_v<ExplicitCols> ||
                  internal::is_column_v<ExplicitCols> ||
                  std::same_as<ExplicitCols, std::remove_cvref_t<decltype(std::ignore)>> ||
                  std::convertible_to<ExplicitCols, std::string>) &&
                 ...)
    auto cte(ExplicitCols... explicitColumns) {
        using namespace ::sqlite_orm::internal;
        static_assert((!is_builtin_numeric_column_alias_v<ExplicitCols> && ...),
                      "Numeric column aliases are reserved for referencing columns locally within a single CTE.");

        using builder_type =
            cte_builder<decltype(moniker), transform_tuple_t<std::tuple<ExplicitCols...>, decay_explicit_column_t>>;
        return builder_type{{std::move(explicitColumns)...}};
    }
#endif

    namespace internal {
#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        template<char A, char... X>
        template<class... ExplicitCols>
            requires((is_column_alias_v<ExplicitCols> || std::is_member_pointer_v<ExplicitCols> ||
                      std::same_as<ExplicitCols, std::remove_cvref_t<decltype(std::ignore)>> ||
                      std::convertible_to<ExplicitCols, std::string>) &&
                     ...)
        auto cte_moniker<A, X...>::operator()(ExplicitCols... explicitColumns) const {
            return cte<cte_moniker<A, X...>>(std::forward<ExplicitCols>(explicitColumns)...);
        }
#else
        template<char A, char... X>
        template<class... ExplicitCols,
                 std::enable_if_t<polyfill::conjunction_v<polyfill::disjunction<
                                      is_column_alias<ExplicitCols>,
                                      std::is_member_pointer<ExplicitCols>,
                                      std::is_same<ExplicitCols, polyfill::remove_cvref_t<decltype(std::ignore)>>,
                                      std::is_convertible<ExplicitCols, std::string>>...>,
                                  bool>>
        auto cte_moniker<A, X...>::operator()(ExplicitCols... explicitColumns) const {
            return cte<cte_moniker<A, X...>>(std::forward<ExplicitCols>(explicitColumns)...);
        }
#endif
    }

    /** 
     *  With-clause for a tuple of ordinary CTEs.
     *  
     *  Despite the missing RECURSIVE keyword, the CTEs can be recursive.
     */
    template<class E, class... CTEs, internal::satisfies_not<internal::is_compound_operator, E> = true>
    internal::with_t<E, CTEs...> with(internal::common_table_expressions<CTEs...> ctes, E expression) {
        return {false, std::move(ctes), std::move(expression)};
    }

    /** 
     *  With-clause for a tuple of ordinary CTEs.
     *  
     *  Despite the missing RECURSIVE keyword, the CTEs can be recursive.
     */
    template<class Compound, class... CTEs, internal::satisfies<internal::is_compound_operator, Compound> = true>
    internal::with_t<internal::select_t<Compound>, CTEs...> with(internal::common_table_expressions<CTEs...> ctes,
                                                                 Compound sel) {
        return {false, std::move(ctes), sqlite_orm::select(std::move(sel))};
    }

    /** 
     *  With-clause for a single ordinary CTE.
     *  
     *  Despite the missing `RECURSIVE` keyword, the CTE can be recursive.
     *  
     *  Example:
     *  constexpr orm_cte_moniker auto cte_1 = 1_ctealias;
     *  with(cte_1().as(select(&Object::id)), select(cte_1->*1_colalias));
     */
    template<class E,
             class CTE,
             internal::satisfies_is_specialization_of<CTE, internal::common_table_expression> = true,
             internal::satisfies_not<internal::is_compound_operator, E> = true>
    internal::with_t<E, CTE> with(CTE cte, E expression) {
        return {false, {std::move(cte)}, std::move(expression)};
    }

    /** 
     *  With-clause for a single ordinary CTE.
     *  
     *  Despite the missing `RECURSIVE` keyword, the CTE can be recursive.
     *  
     *  Example:
     *  constexpr orm_cte_moniker auto cte_1 = 1_ctealias;
     *  with(cte_1().as(select(&Object::id)), select(cte_1->*1_colalias));
     */
    template<class Compound,
             class CTE,
             internal::satisfies_is_specialization_of<CTE, internal::common_table_expression> = true,
             internal::satisfies<internal::is_compound_operator, Compound> = true>
    internal::with_t<internal::select_t<Compound>, CTE> with(CTE cte, Compound sel) {
        return {false, {std::move(cte)}, sqlite_orm::select(std::move(sel))};
    }

    /** 
     *  With-clause for a tuple of potentially recursive CTEs.
     *  
     *  @note The use of RECURSIVE does not force common table expressions to be recursive.
     */
    template<class E, class... CTEs, internal::satisfies_not<internal::is_compound_operator, E> = true>
    internal::with_t<E, CTEs...> with_recursive(internal::common_table_expressions<CTEs...> ctes, E expression) {
        return {true, std::move(ctes), std::move(expression)};
    }

    /** 
     *  With-clause for a tuple of potentially recursive CTEs.
     *  
     *  @note The use of RECURSIVE does not force common table expressions to be recursive.
     */
    template<class Compound, class... CTEs, internal::satisfies<internal::is_compound_operator, Compound> = true>
    internal::with_t<internal::select_t<Compound>, CTEs...>
    with_recursive(internal::common_table_expressions<CTEs...> ctes, Compound sel) {
        return {true, std::move(ctes), sqlite_orm::select(std::move(sel))};
    }

    /** 
     *  With-clause for a single potentially recursive CTE.
     *  
     *  @note The use of RECURSIVE does not force common table expressions to be recursive.
     *  
     *  Example:
     *  constexpr orm_cte_moniker auto cte_1 = 1_ctealias;
     *  with_recursive(cte_1().as(select(&Object::id)), select(cte_1->*1_colalias));
     */
    template<class E,
             class CTE,
             internal::satisfies_is_specialization_of<CTE, internal::common_table_expression> = true,
             internal::satisfies_not<internal::is_compound_operator, E> = true>
    internal::with_t<E, CTE> with_recursive(CTE cte, E expression) {
        return {true, {std::move(cte)}, std::move(expression)};
    }

    /** 
     *  With-clause for a single potentially recursive CTE.
     *  
     *  @note The use of RECURSIVE does not force common table expressions to be recursive.
     *  
     *  Example:
     *  constexpr orm_cte_moniker auto cte_1 = 1_ctealias;
     *  with_recursive(cte_1().as(select(&Object::id)), select(cte_1->*1_colalias));
     */
    template<class Compound,
             class CTE,
             internal::satisfies_is_specialization_of<CTE, internal::common_table_expression> = true,
             internal::satisfies<internal::is_compound_operator, Compound> = true>
    internal::with_t<internal::select_t<Compound>, CTE> with_recursive(CTE cte, Compound sel) {
        return {true, {std::move(cte)}, sqlite_orm::select(std::move(sel))};
    }
#endif

    /**
     *   `SELECT * FROM T` expression that fetches results as tuples.
     *   T is a type mapped to a storage, or an alias of it.
     *   The `definedOrder` parameter denotes the expected order of result columns.
     *   The default is the implicit order as returned by SQLite, which may differ from the defined order
     *   if the schema of a table has been changed.
     *   By specifying the defined order, the columns are written out in the resulting select SQL string.
     *
     *   In pseudo code:
     *   select(asterisk<User>(false)) -> SELECT * from User
     *   select(asterisk<User>(true))  -> SELECT id, name from User
     *
     *   Example: auto rows = storage.select(asterisk<User>());
     *   // decltype(rows) is std::vector<std::tuple<...all columns in implicitly stored order...>>
     *   Example: auto rows = storage.select(asterisk<User>(true));
     *   // decltype(rows) is std::vector<std::tuple<...all columns in declared make_table order...>>
     *   
     *   If you need to fetch results as objects instead of tuples please use `object<T>()`.
     */
    template<class T>
    internal::asterisk_t<T> asterisk(bool definedOrder = false) {
        return {definedOrder};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Example:
     *  constexpr orm_table_alias auto m = "m"_alias.for_<Employee>();
     *  auto reportingTo = 
     *      storage.select(asterisk<m>(), inner_join<m>(on(m->*&Employee::reportsTo == &Employee::employeeId)));
     */
    template<orm_refers_to_recordset auto recordset>
    auto asterisk(bool definedOrder = false) {
        return asterisk<internal::auto_decay_table_ref_t<recordset>>(definedOrder);
    }
#endif

    /**
     *   `SELECT * FROM T` expression that fetches results as objects of type T.
     *   T is a type mapped to a storage, or an alias of it.
     *   
     *   Example: auto rows = storage.select(object<User>());
     *   // decltype(rows) is std::vector<User>, where the User objects are constructed from columns in implicitly stored order
     *   Example: auto rows = storage.select(object<User>(true));
     *   // decltype(rows) is std::vector<User>, where the User objects are constructed from columns in declared make_table order
     *
     *   If you need to fetch results as tuples instead of objects please use `asterisk<T>()`.
     */
    template<class T>
    internal::object_t<T> object(bool definedOrder = false) {
        return {definedOrder};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    template<orm_refers_to_table auto als>
    auto object(bool definedOrder = false) {
        return object<internal::auto_decay_table_ref_t<als>>(definedOrder);
    }
#endif
}
#pragma once

#include <string>  //  std::string

// #include "functional/cxx_universal.h"

namespace sqlite_orm {

    struct table_info {
        int cid = 0;
        std::string name;
        std::string type;
        bool notnull = false;
        std::string dflt_value;
        int pk = 0;

#if !defined(SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED) || !defined(SQLITE_ORM_AGGREGATE_PAREN_INIT_SUPPORTED)
        table_info(decltype(cid) cid_,
                   decltype(name) name_,
                   decltype(type) type_,
                   decltype(notnull) notnull_,
                   decltype(dflt_value) dflt_value_,
                   decltype(pk) pk_) :
            cid(cid_),
            name(std::move(name_)), type(std::move(type_)), notnull(notnull_), dflt_value(std::move(dflt_value_)),
            pk(pk_) {}
#endif
    };

    struct table_xinfo {
        int cid = 0;
        std::string name;
        std::string type;
        bool notnull = false;
        std::string dflt_value;
        int pk = 0;
        int hidden = 0;  // different than 0 => generated_always_as() - TODO verify

#if !defined(SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED) || !defined(SQLITE_ORM_AGGREGATE_PAREN_INIT_SUPPORTED)
        table_xinfo(decltype(cid) cid_,
                    decltype(name) name_,
                    decltype(type) type_,
                    decltype(notnull) notnull_,
                    decltype(dflt_value) dflt_value_,
                    decltype(pk) pk_,
                    decltype(hidden) hidden_) :
            cid(cid_),
            name(std::move(name_)), type(std::move(type_)), notnull(notnull_), dflt_value(std::move(dflt_value_)),
            pk(pk_), hidden{hidden_} {}
#endif
    };
}
#pragma once

#include <memory>
#include <sstream>
#include <string>
#include <tuple>

// #include "../functional/cxx_universal.h"

// #include "../optional_container.h"

// NOTE Idea : Maybe also implement a custom trigger system to call a c++ callback when a trigger triggers ?
// (Could be implemented with a normal trigger that insert or update an internal table and then retreive
// the event in the C++ code, to call the C++ user callback, with update hooks: https://www.sqlite.org/c3ref/update_hook.html)
// It could be an interesting feature to bring to sqlite_orm that other libraries don't have ?

namespace sqlite_orm {
    namespace internal {
        enum class trigger_timing { trigger_before, trigger_after, trigger_instead_of };
        enum class trigger_type { trigger_delete, trigger_insert, trigger_update };

        /**
         * This class is an intermediate SQLite trigger, to be used with
         * `make_trigger` to create a full trigger.
         *  T is the base of the trigger (contains its type, timing and associated table)
         *  S is the list of trigger statements
         */
        template<class T, class... S>
        struct partial_trigger_t {
            using statements_type = std::tuple<S...>;

            /**
             * Base of the trigger (contains its type, timing and associated table)
             */
            T base;
            /**
             * Statements of the triggers (to be executed when the trigger fires)
             */
            statements_type statements;

            partial_trigger_t(T trigger_base, S... statements) :
                base{std::move(trigger_base)}, statements{std::make_tuple<S...>(std::forward<S>(statements)...)} {}

            partial_trigger_t& end() {
                return *this;
            }
        };

        struct base_trigger {
            /**
             * Name of the trigger
             */
            std::string name;
        };

        /**
         * This class represent a SQLite trigger
         *  T is the base of the trigger (contains its type, timing and associated table)
         *  S is the list of trigger statments
         */
        template<class T, class... S>
        struct trigger_t : base_trigger {
            using object_type = void;
            using elements_type = typename partial_trigger_t<T, S...>::statements_type;

            /**
             * Base of the trigger (contains its type, timing and associated table)
             */
            T base;

            /**
             * Statements of the triggers (to be executed when the trigger fires)
             */
            elements_type elements;

#ifndef SQLITE_ORM_AGGREGATE_BASES_SUPPORTED
            trigger_t(std::string name, T trigger_base, elements_type statements) :
                base_trigger{std::move(name)}, base(std::move(trigger_base)), elements(std::move(statements)) {}
#endif
        };

        /**
         * Base of a trigger. Contains the trigger type/timming and the table type
         * T is the table type
         * W is `when` expression type
         * Type is the trigger base type (type+timing)
         */
        template<class T, class W, class Type>
        struct trigger_base_t {
            using table_type = T;
            using when_type = W;
            using trigger_type_base = Type;

            /**
             * Contains the trigger type and timing
             */
            trigger_type_base type_base;
            /**
             * Value used to determine if we execute the trigger on each row or on each statement
             * (SQLite doesn't support the FOR EACH STATEMENT syntax yet: https://sqlite.org/lang_createtrigger.html#description
             * so this value is more of a placeholder for a later update)
             */
            bool do_for_each_row = false;
            /**
             * When expression (if any)
             * If a WHEN expression is specified, the trigger will only execute
             * if the expression evaluates to true when the trigger is fired
             */
            optional_container<when_type> container_when;

            trigger_base_t(trigger_type_base type_base_) : type_base(std::move(type_base_)) {}

            trigger_base_t& for_each_row() {
                this->do_for_each_row = true;
                return *this;
            }

            template<class WW>
            trigger_base_t<T, WW, Type> when(WW expression) {
                trigger_base_t<T, WW, Type> res(this->type_base);
                res.container_when.field = std::move(expression);
                return res;
            }

            template<class... S>
            partial_trigger_t<trigger_base_t<T, W, Type>, S...> begin(S... statements) {
                return {*this, std::forward<S>(statements)...};
            }
        };

        /**
         * Contains the trigger type and timing
         */
        struct trigger_type_base_t {
            /**
             * Value indicating if the trigger is run BEFORE, AFTER or INSTEAD OF
             * the statement that fired it.
             */
            trigger_timing timing;
            /**
             * The type of the statement that would cause the trigger to fire.
             * Can be DELETE, INSERT, or UPDATE.
             */
            trigger_type type;

            trigger_type_base_t(trigger_timing timing, trigger_type type) : timing(timing), type(type) {}

            template<class T>
            trigger_base_t<T, void, trigger_type_base_t> on() {
                return {*this};
            }
        };

        /**
         * Special case for UPDATE OF (columns)
         * Contains the trigger type and timing
         */
        template<class... Cs>
        struct trigger_update_type_t : trigger_type_base_t {
            using columns_type = std::tuple<Cs...>;

            /**
             * Contains the columns the trigger is watching. Will only
             * trigger if one of theses columns is updated.
             */
            columns_type columns;

            trigger_update_type_t(trigger_timing timing, trigger_type type, Cs... columns) :
                trigger_type_base_t(timing, type), columns(std::make_tuple<Cs...>(std::forward<Cs>(columns)...)) {}

            template<class T>
            trigger_base_t<T, void, trigger_update_type_t<Cs...>> on() {
                return {*this};
            }
        };

        struct trigger_timing_t {
            trigger_timing timing;

            trigger_type_base_t delete_() {
                return {timing, trigger_type::trigger_delete};
            }

            trigger_type_base_t insert() {
                return {timing, trigger_type::trigger_insert};
            }

            trigger_type_base_t update() {
                return {timing, trigger_type::trigger_update};
            }

            template<class... Cs>
            trigger_update_type_t<Cs...> update_of(Cs... columns) {
                return {timing, trigger_type::trigger_update, std::forward<Cs>(columns)...};
            }
        };

        struct raise_t {
            enum class type_t {
                ignore,
                rollback,
                abort,
                fail,
            };

            type_t type = type_t::ignore;
            std::string message;

#ifndef SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
            raise_t(type_t type, std::string message) : type{type}, message{std::move(message)} {}
#endif
        };

        template<class T>
        struct new_t {
            using expression_type = T;

            expression_type expression;
        };

        template<class T>
        struct old_t {
            using expression_type = T;

            expression_type expression;
        };
    }  // NAMESPACE internal

    /**
     *  NEW.expression function used within TRIGGER expressions
     */
    template<class T>
    internal::new_t<T> new_(T expression) {
        return {std::move(expression)};
    }

    /**
     *  OLD.expression function used within TRIGGER expressions
     */
    template<class T>
    internal::old_t<T> old(T expression) {
        return {std::move(expression)};
    }

    /**
     *  RAISE(IGNORE) expression used within TRIGGER expressions
     */
    inline internal::raise_t raise_ignore() {
        return {internal::raise_t::type_t::ignore, {}};
    }

    /**
     *  RAISE(ROLLBACK, %message%) expression used within TRIGGER expressions
     */
    inline internal::raise_t raise_rollback(std::string message) {
        return {internal::raise_t::type_t::rollback, std::move(message)};
    }

    /**
     *  RAISE(ABORT, %message%) expression used within TRIGGER expressions
     */
    inline internal::raise_t raise_abort(std::string message) {
        return {internal::raise_t::type_t::abort, std::move(message)};
    }

    /**
     *  RAISE(FAIL, %message%) expression used within TRIGGER expressions
     */
    inline internal::raise_t raise_fail(std::string message) {
        return {internal::raise_t::type_t::fail, std::move(message)};
    }

    template<class T, class... S>
    internal::trigger_t<T, S...> make_trigger(std::string name, const internal::partial_trigger_t<T, S...>& part) {
        SQLITE_ORM_CLANG_SUPPRESS_MISSING_BRACES(
            return {std::move(name), std::move(part.base), std::move(part.statements)});
    }

    inline internal::trigger_timing_t before() {
        return {internal::trigger_timing::trigger_before};
    }

    inline internal::trigger_timing_t after() {
        return {internal::trigger_timing::trigger_after};
    }

    inline internal::trigger_timing_t instead_of() {
        return {internal::trigger_timing::trigger_instead_of};
    }
}
#pragma once

#include "sqlite3.h"
#include <type_traits>  //  std::enable_if_t, std::is_arithmetic, std::is_same, std::true_type, std::false_type, std::make_index_sequence, std::index_sequence
#include <memory>  //  std::default_delete
#include <string>  //  std::string, std::wstring
#include <vector>  //  std::vector
#include <cstring>  //  ::strncpy, ::strlen
// #include "functional/cxx_string_view.h"

#ifndef SQLITE_ORM_STRING_VIEW_SUPPORTED
#include <cwchar>  //  ::wcsncpy, ::wcslen
#endif
#ifndef SQLITE_ORM_OMITS_CODECVT
#include <locale>  // std::wstring_convert
#include <codecvt>  //  std::codecvt_utf8_utf16
#endif

// #include "functional/cxx_universal.h"

// #include "functional/cxx_type_traits_polyfill.h"

// #include "functional/cxx_functional_polyfill.h"

// #include "is_std_ptr.h"

// #include "tuple_helper/tuple_filter.h"

// #include "type_traits.h"

// #include "error_code.h"

// #include "arithmetic_tag.h"

#include <type_traits>  // std::is_integral

// #include "functional/mpl/conditional.h"

namespace sqlite_orm {

    /**
     *  Helper classes used by statement_binder and row_extractor.
     */
    struct int_or_smaller_tag {};
    struct bigint_tag {};
    struct real_tag {};

    template<class V>
    using arithmetic_tag_t =
        mpl::conditional_t<std::is_integral<V>::value,
                           // Integer class
                           mpl::conditional_t<sizeof(V) <= sizeof(int), int_or_smaller_tag, bigint_tag>,
                           // Floating-point class
                           real_tag>;
}

// #include "xdestroy_handling.h"

#include <type_traits>  // std::integral_constant
#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
#include <concepts>
#endif

// #include "functional/cxx_universal.h"

// #include "functional/cxx_type_traits_polyfill.h"

namespace sqlite_orm {

    using xdestroy_fn_t = void (*)(void*);
    using null_xdestroy_t = std::integral_constant<xdestroy_fn_t, nullptr>;
    SQLITE_ORM_INLINE_VAR constexpr null_xdestroy_t null_xdestroy_f{};
}

namespace sqlite_orm {
    namespace internal {
#ifdef SQLITE_ORM_CONCEPTS_SUPPORTED
        /**
         *  Constrains a deleter to be state-less.
         */
        template<typename D>
        concept stateless_deleter = std::is_empty_v<D> && std::is_default_constructible_v<D>;

        /**
         *  Constrains a deleter to be an integral function constant.
         */
        template<typename D>
        concept integral_fp_c = requires {
            typename D::value_type;
            D::value;
            requires std::is_function_v<std::remove_pointer_t<typename D::value_type>>;
        };

        /**
         *  Constrains a deleter to be or to yield a function pointer.
         */
        template<typename D>
        concept yields_fp = requires(D d) {
            // yielding function pointer by using the plus trick
            { +d };
            requires std::is_function_v<std::remove_pointer_t<decltype(+d)>>;
        };
#endif

#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
        /**
         *  Yield a deleter's function pointer.
         */
        template<yields_fp D>
        struct yield_fp_of {
            using type = decltype(+std::declval<D>());
        };
#else

        template<typename D>
        SQLITE_ORM_INLINE_VAR constexpr bool is_stateless_deleter_v =
            std::is_empty<D>::value && std::is_default_constructible<D>::value;

        template<typename D, typename SFINAE = void>
        struct is_integral_fp_c : std::false_type {};
        template<typename D>
        struct is_integral_fp_c<
            D,
            polyfill::void_t<typename D::value_type,
                             decltype(D::value),
                             std::enable_if_t<std::is_function<std::remove_pointer_t<typename D::value_type>>::value>>>
            : std::true_type {};
        template<typename D>
        SQLITE_ORM_INLINE_VAR constexpr bool is_integral_fp_c_v = is_integral_fp_c<D>::value;

        template<typename D, typename SFINAE = void>
        struct can_yield_fp : std::false_type {};
        template<typename D>
        struct can_yield_fp<
            D,
            polyfill::void_t<
                decltype(+std::declval<D>()),
                std::enable_if_t<std::is_function<std::remove_pointer_t<decltype(+std::declval<D>())>>::value>>>
            : std::true_type {};
        template<typename D>
        SQLITE_ORM_INLINE_VAR constexpr bool can_yield_fp_v = can_yield_fp<D>::value;

        template<typename D, bool = can_yield_fp_v<D>>
        struct yield_fp_of {
            using type = void;
        };
        template<typename D>
        struct yield_fp_of<D, true> {
            using type = decltype(+std::declval<D>());
        };
#endif
        template<typename D>
        using yielded_fn_t = typename yield_fp_of<D>::type;

#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
        template<typename D>
        concept is_unusable_for_xdestroy =
            (!stateless_deleter<D> && (yields_fp<D> && !std::convertible_to<yielded_fn_t<D>, xdestroy_fn_t>));

        /**
         *  This concept tests whether a deleter yields a function pointer, which is convertible to an xdestroy function pointer.
         *  Note: We are using 'is convertible' rather than 'is same' because of any exception specification.
         */
        template<typename D>
        concept yields_xdestroy = yields_fp<D> && std::convertible_to<yielded_fn_t<D>, xdestroy_fn_t>;

        template<typename D, typename P>
        concept needs_xdestroy_proxy =
            (stateless_deleter<D> && (!yields_fp<D> || !std::convertible_to<yielded_fn_t<D>, xdestroy_fn_t>));

        /**
         *  xDestroy function that constructs and invokes the stateless deleter.
         *  
         *  Requires that the deleter can be called with the q-qualified pointer argument;
         *  it doesn't check so explicitly, but a compiler error will occur.
         */
        template<typename D, typename P>
            requires(!integral_fp_c<D>)
        void xdestroy_proxy(void* p) noexcept {
            // C-casting `void* -> P*` like statement_binder<pointer_binding<P, T, D>>
            auto o = (P*)p;
            // ignoring return code
            (void)D{}(o);
        }

        /**
         *  xDestroy function that invokes the integral function pointer constant.
         *  
         *  Performs a const-cast of the argument pointer in order to allow for C API functions
         *  that take a non-const parameter, but user code passes a pointer to a const object.
         */
        template<integral_fp_c D, typename P>
        void xdestroy_proxy(void* p) noexcept {
            // C-casting `void* -> P*` like statement_binder<pointer_binding<P, T, D>>,
            auto o = (std::remove_cv_t<P>*)(P*)p;
            // ignoring return code
            (void)D{}(o);
        }
#else
        template<typename D>
        SQLITE_ORM_INLINE_VAR constexpr bool is_unusable_for_xdestroy_v =
            !is_stateless_deleter_v<D> &&
            (can_yield_fp_v<D> && !std::is_convertible<yielded_fn_t<D>, xdestroy_fn_t>::value);

        template<typename D>
        SQLITE_ORM_INLINE_VAR constexpr bool can_yield_xdestroy_v =
            can_yield_fp_v<D> && std::is_convertible<yielded_fn_t<D>, xdestroy_fn_t>::value;

        template<typename D, typename P>
        SQLITE_ORM_INLINE_VAR constexpr bool needs_xdestroy_proxy_v =
            is_stateless_deleter_v<D> &&
            (!can_yield_fp_v<D> || !std::is_convertible<yielded_fn_t<D>, xdestroy_fn_t>::value);

        template<typename D, typename P, std::enable_if_t<!is_integral_fp_c_v<D>, bool> = true>
        void xdestroy_proxy(void* p) noexcept {
            // C-casting `void* -> P*` like statement_binder<pointer_binding<P, T, D>>
            auto o = (P*)p;
            // ignoring return code
            (void)D{}(o);
        }

        template<typename D, typename P, std::enable_if_t<is_integral_fp_c_v<D>, bool> = true>
        void xdestroy_proxy(void* p) noexcept {
            // C-casting `void* -> P*` like statement_binder<pointer_binding<P, T, D>>,
            auto o = (std::remove_cv_t<P>*)(P*)p;
            // ignoring return code
            (void)D{}(o);
        }
#endif
    }
}

namespace sqlite_orm {

#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
    /**
     *  Prohibits using a yielded function pointer, which is not of type xdestroy_fn_t.
     *  
     *  Explicitly declared for better error messages.
     */
    template<typename P, typename D>
    constexpr xdestroy_fn_t obtain_xdestroy_for(D, P* = nullptr) noexcept
        requires(internal::is_unusable_for_xdestroy<D>)
    {
        static_assert(polyfill::always_false_v<D>,
                      "A function pointer, which is not of type xdestroy_fn_t, is prohibited.");
        return nullptr;
    }

    /**
     *  Obtains a proxy 'xDestroy' function pointer [of type void(*)(void*)]
     *  for a deleter in a type-safe way.
     *  
     *  The deleter can be one of:
     *         - integral function constant
     *         - state-less (empty) deleter
     *         - non-capturing lambda
     *  
     *  Type-safety is garanteed by checking whether the deleter or yielded function pointer
     *  is invocable with the non-q-qualified pointer value.
     */
    template<typename P, typename D>
    constexpr xdestroy_fn_t obtain_xdestroy_for(D, P* = nullptr) noexcept
        requires(internal::needs_xdestroy_proxy<D, P>)
    {
        return internal::xdestroy_proxy<D, P>;
    }

    /**
     *  Directly obtains a 'xDestroy' function pointer [of type void(*)(void*)]
     *  from a deleter in a type-safe way.
     *  
     *  The deleter can be one of:
     *         - function pointer of type xdestroy_fn_t
     *         - structure holding a function pointer
     *         - integral function constant
     *         - non-capturing lambda
     *  ... and yield a function pointer of type xdestroy_fn_t.
     *  
     *  Type-safety is garanteed by checking whether the deleter or yielded function pointer
     *  is invocable with the non-q-qualified pointer value.
     */
    template<typename P, typename D>
    constexpr xdestroy_fn_t obtain_xdestroy_for(D d, P* = nullptr) noexcept
        requires(internal::yields_xdestroy<D>)
    {
        return d;
    }
#else
    template<typename P, typename D, std::enable_if_t<internal::is_unusable_for_xdestroy_v<D>, bool> = true>
    constexpr xdestroy_fn_t obtain_xdestroy_for(D, P* = nullptr) {
        static_assert(polyfill::always_false_v<D>,
                      "A function pointer, which is not of type xdestroy_fn_t, is prohibited.");
        return nullptr;
    }

    template<typename P, typename D, std::enable_if_t<internal::needs_xdestroy_proxy_v<D, P>, bool> = true>
    constexpr xdestroy_fn_t obtain_xdestroy_for(D, P* = nullptr) noexcept {
        return internal::xdestroy_proxy<D, P>;
    }

    template<typename P, typename D, std::enable_if_t<internal::can_yield_xdestroy_v<D>, bool> = true>
    constexpr xdestroy_fn_t obtain_xdestroy_for(D d, P* = nullptr) noexcept {
        return d;
    }
#endif
}

// #include "pointer_value.h"

#if SQLITE_VERSION_NUMBER >= 3020000
#include <type_traits>
#include <memory>
#include <utility>
#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
#include <concepts>
#endif
#endif

// #include "functional/cstring_literal.h"

// #include "xdestroy_handling.h"

#if SQLITE_VERSION_NUMBER >= 3020000
namespace sqlite_orm {
#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    namespace internal {
        template<char... C>
        struct pointer_type {
            using value_type = const char[sizeof...(C) + 1];
            static inline constexpr value_type value = {C..., '\0'};
        };
    }

    inline namespace literals {
        template<internal::cstring_literal tag>
        [[nodiscard]] consteval auto operator"" _pointer_type() {
            return internal::explode_into<internal::pointer_type, tag>(std::make_index_sequence<tag.size()>{});
        }
    }

    /** @short Specifies that a type is an integral constant string usable as a pointer type.
     */
    template<class T>
    concept orm_pointer_type = requires {
        typename T::value_type;
        { T::value } -> std::convertible_to<const char*>;
    };
#endif

    /**
     *  Wraps a pointer and tags it with a pointer type,
     *  used for accepting function parameters,
     *  facilitating the 'pointer-passing interface'.
     * 
     *  Template parameters:
     *    - P: The value type, possibly const-qualified.
     *    - T: An integral constant string denoting the pointer type, e.g. `"carray"_pointer_type`.
     *
     */
    template<typename P, typename T>
    struct pointer_arg {

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        // note (internal): this is currently a static assertion instead of a type constraint because
        // of forward declarations in other places (e.g. function.h)
        static_assert(orm_pointer_type<T>, "T must be a pointer type (tag)");
#else
        static_assert(std::is_convertible<typename T::value_type, const char*>::value,
                      "The pointer type (tag) must be convertible to `const char*`");
#endif

        using tag = T;
        using qualified_type = P;

        P* p_;

        P* ptr() const noexcept {
            return p_;
        }

        operator P*() const noexcept {
            return p_;
        }
    };

    /**
     *  Pointer value with associated deleter function,
     *  used for returning or binding pointer values
     *  as part of facilitating the 'pointer-passing interface'.
     * 
     *  Template parameters:
     *    - P: The value type, possibly const-qualified.
     *    - T: An integral constant string denoting the pointer type, e.g. `carray_pointer_type`.
     *    - D: The deleter for the pointer value;
     *         can be one of:
     *         - function pointer
     *         - integral function pointer constant
     *         - state-less (empty) deleter
     *         - non-capturing lambda
     *         - structure implicitly yielding a function pointer
     *
     *  @note Use one of the factory functions to create a pointer binding,
     *  e.g. bindable_carray_pointer or statically_bindable_carray_pointer().
     *  
     *  @example
     *  ```
     *  int64 rememberedId;
     *  storage.select(func<remember_fn>(&Object::id, statically_bindable_carray_pointer(&rememberedId)));
     *  ```
     */
    template<typename P, typename T, typename D>
    class pointer_binding {

        P* p_;
        SQLITE_ORM_NOUNIQUEADDRESS
        D d_;

      protected:
        // Constructing pointer bindings must go through bind_pointer()
        template<class T2, class P2, class D2>
        friend auto bind_pointer(P2*, D2) noexcept -> pointer_binding<P2, T2, D2>;
#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        // Constructing pointer bindings must go through bind_pointer()
        template<orm_pointer_type auto tag, class P2, class D2>
        friend auto bind_pointer(P2*, D2) noexcept -> pointer_binding<P2, decltype(tag), D2>;
#endif
        template<class B>
        friend B bind_pointer(typename B::qualified_type*, typename B::deleter_type) noexcept;

        // Construct from pointer and deleter.
        // Transfers ownership of the passed in object.
        pointer_binding(P* p, D d = {}) noexcept : p_{p}, d_{std::move(d)} {}

      public:
        using qualified_type = P;
        using tag = T;
        using deleter_type = D;

        pointer_binding(const pointer_binding&) = delete;
        pointer_binding& operator=(const pointer_binding&) = delete;
        pointer_binding& operator=(pointer_binding&&) = delete;

        pointer_binding(pointer_binding&& other) noexcept :
            p_{std::exchange(other.p_, nullptr)}, d_{std::move(other.d_)} {}

        ~pointer_binding() {
            if(p_) {
                if(auto xDestroy = get_xdestroy()) {
                    // note: C-casting `P* -> void*` like statement_binder<pointer_binding<P, T, D>>
                    xDestroy((void*)p_);
                }
            }
        }

        P* ptr() const noexcept {
            return p_;
        }

        P* take_ptr() noexcept {
            return std::exchange(p_, nullptr);
        }

        xdestroy_fn_t get_xdestroy() const noexcept {
            return obtain_xdestroy_for(d_, p_);
        }
    };

    /**
     *  Alias template for a static pointer value binding.
     *  'Static' means that ownership won't be transferred to sqlite,
     *  sqlite doesn't delete it, and sqlite assumes the object
     *  pointed to is valid throughout the lifetime of a statement.
     */
    template<typename P, typename T>
    using static_pointer_binding = pointer_binding<P, T, null_xdestroy_t>;

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    template<class P, orm_pointer_type auto tag>
    using pointer_arg_t = pointer_arg<P, decltype(tag)>;

    template<class P, orm_pointer_type auto tag, class D>
    using pointer_binding_t = pointer_binding<P, decltype(tag), D>;

    /**
     *  Alias template for a static pointer value binding.
     *  'Static' means that ownership won't be transferred to sqlite,
     *  sqlite doesn't delete it, and sqlite assumes the object
     *  pointed to is valid throughout the lifetime of a statement.
     */
    template<typename P, orm_pointer_type auto tag>
    using static_pointer_binding_t = pointer_binding_t<P, tag, null_xdestroy_t>;
#endif
}

namespace sqlite_orm {
    /**
     *  Wrap a pointer, its type and its deleter function for binding it to a statement.
     *  
     *  Unless the deleter yields a nullptr 'xDestroy' function the ownership of the pointed-to-object
     *  is transferred to the pointer binding, which will delete it through
     *  the deleter when the statement finishes.
     */
    template<class T, class P, class D>
    auto bind_pointer(P* p, D d) noexcept -> pointer_binding<P, T, D> {
        return {p, std::move(d)};
    }

    template<class T, class P, class D>
    auto bind_pointer(std::unique_ptr<P, D> p) noexcept -> pointer_binding<P, T, D> {
        return bind_pointer<T>(p.release(), p.get_deleter());
    }

    template<typename B>
    auto bind_pointer(typename B::qualified_type* p, typename B::deleter_type d = {}) noexcept -> B {
        return B{p, std::move(d)};
    }

    template<class T, class P, class D>
    [[deprecated("Use the better named function `bind_pointer(...)`")]] pointer_binding<P, T, D>
    bindable_pointer(P* p, D d) noexcept {
        return bind_pointer<T>(p, std::move(d));
    }

    template<class T, class P, class D>
    [[deprecated("Use the better named function `bind_pointer(...)`")]] pointer_binding<P, T, D>
    bindable_pointer(std::unique_ptr<P, D> p) noexcept {
        return bind_pointer<T>(p.release(), p.get_deleter());
    }

    template<typename B>
    [[deprecated("Use the better named function `bind_pointer(...)`")]] B
    bindable_pointer(typename B::qualified_type* p, typename B::deleter_type d = {}) noexcept {
        return bind_pointer<B>(p, std::move(d));
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Wrap a pointer, its type (tag) and its deleter function for binding it to a statement.
     *  
     *  Unless the deleter yields a nullptr 'xDestroy' function the ownership of the pointed-to-object
     *  is transferred to the pointer binding, which will delete it through
     *  the deleter when the statement finishes.
     */
    template<orm_pointer_type auto tag, class P, class D>
    auto bind_pointer(P* p, D d) noexcept -> pointer_binding<P, decltype(tag), D> {
        return {p, std::move(d)};
    }

    template<orm_pointer_type auto tag, class P, class D>
    auto bind_pointer(std::unique_ptr<P, D> p) noexcept -> pointer_binding<P, decltype(tag), D> {
        return bind_pointer<tag>(p.release(), p.get_deleter());
    }
#endif

    /**
     *  Wrap a pointer and its type for binding it to a statement.
     *  
     *  Note: 'Static' means that ownership of the pointed-to-object won't be transferred
     *  and sqlite assumes the object pointed to is valid throughout the lifetime of a statement.
     */
    template<class T, class P>
    auto bind_pointer_statically(P* p) noexcept -> static_pointer_binding<P, T> {
        return bind_pointer<T>(p, null_xdestroy_f);
    }

    template<typename B>
    B bind_pointer_statically(typename B::qualified_type* p,
                              typename B::deleter_type* /*exposition*/ = nullptr) noexcept {
        return bind_pointer<B>(p);
    }

    template<class T, class P>
    [[deprecated("Use the better named function `bind_pointer_statically(...)`")]] static_pointer_binding<P, T>
    statically_bindable_pointer(P* p) noexcept {
        return bind_pointer<T>(p, null_xdestroy_f);
    }

    template<typename B>
    [[deprecated("Use the better named function `bind_pointer_statically(...)`")]] B
    statically_bindable_pointer(typename B::qualified_type* p,
                                typename B::deleter_type* /*exposition*/ = nullptr) noexcept {
        return bind_pointer<B>(p);
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Wrap a pointer and its type (tag) for binding it to a statement.
     *  
     *  Note: 'Static' means that ownership of the pointed-to-object won't be transferred
     *  and sqlite assumes the object pointed to is valid throughout the lifetime of a statement.
     */
    template<orm_pointer_type auto tag, class P>
    auto bind_pointer_statically(P* p) noexcept -> static_pointer_binding<P, decltype(tag)> {
        return bind_pointer<tag>(p, null_xdestroy_f);
    }
#endif

    /**
     *  Forward a pointer value from an argument.
     */
    template<class P, class T>
    auto rebind_statically(const pointer_arg<P, T>& pv) noexcept -> static_pointer_binding<P, T> {
        return bind_pointer_statically<T>(pv.ptr());
    }
}
#endif

namespace sqlite_orm {

    /**
     *  Helper class used for binding fields to sqlite3 statements.
     */
    template<class V, typename Enable = void>
    struct statement_binder;

    namespace internal {
        /*
         *  Implementation note: the technique of indirect expression testing is because
         *  of older compilers having problems with the detection of dependent templates [SQLITE_ORM_BROKEN_ALIAS_TEMPLATE_DEPENDENT_EXPR_SFINAE].
         *  It must also be a type that differs from those for `is_printable_v`, `is_preparable_v`.
         */
        template<class Binder>
        struct indirectly_test_bindable;

        template<class T, class SFINAE = void>
        SQLITE_ORM_INLINE_VAR constexpr bool is_bindable_v = false;
        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool
            is_bindable_v<T, polyfill::void_t<indirectly_test_bindable<decltype(statement_binder<T>{})>>> = true;

        template<class T>
        struct is_bindable : polyfill::bool_constant<is_bindable_v<T>> {};
    }

#if SQLITE_VERSION_NUMBER >= 3020000
    /**
     *  Specialization for pointer bindings (part of the 'pointer-passing interface').
     */
    template<class P, class T, class D>
    struct statement_binder<pointer_binding<P, T, D>, void> {
        using V = pointer_binding<P, T, D>;

        // ownership of pointed-to-object is left untouched and remains at prepared statement's AST expression
        int bind(sqlite3_stmt* stmt, int index, const V& value) const {
            // note: C-casting `P* -> void*`, internal::xdestroy_proxy() does the inverse
            return sqlite3_bind_pointer(stmt, index, (void*)value.ptr(), T::value, null_xdestroy_f);
        }

        // ownership of pointed-to-object is transferred to sqlite
        void result(sqlite3_context* context, V& value) const {
            // note: C-casting `P* -> void*`,
            // row_extractor<pointer_arg<P, T>>::extract() and internal::xdestroy_proxy() do the inverse
            sqlite3_result_pointer(context, (void*)value.take_ptr(), T::value, value.get_xdestroy());
        }
    };
#endif

    /**
     *  Specialization for arithmetic types.
     */
    template<class V>
    struct statement_binder<V, internal::match_if<std::is_arithmetic, V>> {

        int bind(sqlite3_stmt* stmt, int index, const V& value) const {
            return this->bind(stmt, index, value, tag());
        }

        void result(sqlite3_context* context, const V& value) const {
            this->result(context, value, tag());
        }

      private:
        using tag = arithmetic_tag_t<V>;

        int bind(sqlite3_stmt* stmt, int index, const V& value, int_or_smaller_tag) const {
            return sqlite3_bind_int(stmt, index, static_cast<int>(value));
        }

        void result(sqlite3_context* context, const V& value, int_or_smaller_tag) const {
            sqlite3_result_int(context, static_cast<int>(value));
        }

        int bind(sqlite3_stmt* stmt, int index, const V& value, bigint_tag) const {
            return sqlite3_bind_int64(stmt, index, static_cast<sqlite3_int64>(value));
        }

        void result(sqlite3_context* context, const V& value, bigint_tag) const {
            sqlite3_result_int64(context, static_cast<sqlite3_int64>(value));
        }

        int bind(sqlite3_stmt* stmt, int index, const V& value, real_tag) const {
            return sqlite3_bind_double(stmt, index, static_cast<double>(value));
        }

        void result(sqlite3_context* context, const V& value, real_tag) const {
            sqlite3_result_double(context, static_cast<double>(value));
        }
    };

    /**
     *  Specialization for std::string and C-string.
     */
    template<class V>
    struct statement_binder<V,
                            std::enable_if_t<polyfill::disjunction<std::is_base_of<std::string, V>,
                                                                   std::is_same<V, const char*>
#ifdef SQLITE_ORM_STRING_VIEW_SUPPORTED
                                                                   ,
                                                                   std::is_same<V, std::string_view>
#endif
                                                                   >::value>> {

        int bind(sqlite3_stmt* stmt, int index, const V& value) const {
            auto stringData = this->string_data(value);
            return sqlite3_bind_text(stmt, index, stringData.first, stringData.second, SQLITE_TRANSIENT);
        }

        void result(sqlite3_context* context, const V& value) const {
            auto stringData = this->string_data(value);
            auto dataCopy = new char[stringData.second + 1];
            constexpr auto deleter = std::default_delete<char[]>{};
            ::strncpy(dataCopy, stringData.first, stringData.second + 1);
            sqlite3_result_text(context, dataCopy, stringData.second, obtain_xdestroy_for(deleter, dataCopy));
        }

      private:
#ifdef SQLITE_ORM_STRING_VIEW_SUPPORTED
        std::pair<const char*, int> string_data(const std::string_view& s) const {
            return {s.data(), int(s.size())};
        }
#else
        std::pair<const char*, int> string_data(const std::string& s) const {
            return {s.c_str(), int(s.size())};
        }

        std::pair<const char*, int> string_data(const char* s) const {
            return {s, int(::strlen(s))};
        }
#endif
    };

#ifndef SQLITE_ORM_OMITS_CODECVT
    template<class V>
    struct statement_binder<V,
                            std::enable_if_t<polyfill::disjunction<std::is_base_of<std::wstring, V>,
                                                                   std::is_same<V, const wchar_t*>
#ifdef SQLITE_ORM_STRING_VIEW_SUPPORTED
                                                                   ,
                                                                   std::is_same<V, std::wstring_view>
#endif
                                                                   >::value>> {

        int bind(sqlite3_stmt* stmt, int index, const V& value) const {
            auto stringData = this->string_data(value);
            std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
            std::string utf8Str = converter.to_bytes(stringData.first, stringData.first + stringData.second);
            return statement_binder<decltype(utf8Str)>().bind(stmt, index, utf8Str);
        }

        void result(sqlite3_context* context, const V& value) const {
            auto stringData = this->string_data(value);
            sqlite3_result_text16(context, stringData.first, stringData.second, nullptr);
        }

      private:
#ifdef SQLITE_ORM_STRING_VIEW_SUPPORTED
        std::pair<const wchar_t*, int> string_data(const std::wstring_view& s) const {
            return {s.data(), int(s.size())};
        }
#else
        std::pair<const wchar_t*, int> string_data(const std::wstring& s) const {
            return {s.c_str(), int(s.size())};
        }

        std::pair<const wchar_t*, int> string_data(const wchar_t* s) const {
            return {s, int(::wcslen(s))};
        }
#endif
    };
#endif

    /**
     *  Specialization for nullptr_t.
     */
    template<>
    struct statement_binder<nullptr_t, void> {
        int bind(sqlite3_stmt* stmt, int index, const nullptr_t&) const {
            return sqlite3_bind_null(stmt, index);
        }

        void result(sqlite3_context* context, const nullptr_t&) const {
            sqlite3_result_null(context);
        }
    };

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
    /**
     *  Specialization for std::nullopt_t.
     */
    template<>
    struct statement_binder<std::nullopt_t, void> {
        int bind(sqlite3_stmt* stmt, int index, const std::nullopt_t&) const {
            return sqlite3_bind_null(stmt, index);
        }

        void result(sqlite3_context* context, const std::nullopt_t&) const {
            sqlite3_result_null(context);
        }
    };
#endif  //  SQLITE_ORM_OPTIONAL_SUPPORTED

    template<class V>
    struct statement_binder<
        V,
        std::enable_if_t<is_std_ptr<V>::value &&
                         internal::is_bindable<std::remove_cv_t<typename V::element_type>>::value>> {
        using unqualified_type = std::remove_cv_t<typename V::element_type>;

        int bind(sqlite3_stmt* stmt, int index, const V& value) const {
            if(value) {
                return statement_binder<unqualified_type>().bind(stmt, index, *value);
            } else {
                return statement_binder<nullptr_t>().bind(stmt, index, nullptr);
            }
        }
    };

    /**
     *  Specialization for binary data (std::vector<char>).
     */
    template<>
    struct statement_binder<std::vector<char>, void> {
        int bind(sqlite3_stmt* stmt, int index, const std::vector<char>& value) const {
            if(!value.empty()) {
                return sqlite3_bind_blob(stmt, index, (const void*)&value.front(), int(value.size()), SQLITE_TRANSIENT);
            } else {
                return sqlite3_bind_blob(stmt, index, "", 0, SQLITE_TRANSIENT);
            }
        }

        void result(sqlite3_context* context, const std::vector<char>& value) const {
            if(!value.empty()) {
                sqlite3_result_blob(context, (const void*)&value.front(), int(value.size()), nullptr);
            } else {
                sqlite3_result_blob(context, "", 0, nullptr);
            }
        }
    };

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
    template<class V>
    struct statement_binder<V,
                            std::enable_if_t<polyfill::is_specialization_of_v<V, std::optional> &&
                                             internal::is_bindable_v<std::remove_cv_t<typename V::value_type>>>> {
        using unqualified_type = std::remove_cv_t<typename V::value_type>;

        int bind(sqlite3_stmt* stmt, int index, const V& value) const {
            if(value) {
                return statement_binder<unqualified_type>().bind(stmt, index, *value);
            } else {
                return statement_binder<std::nullopt_t>().bind(stmt, index, std::nullopt);
            }
        }
    };
#endif  //  SQLITE_ORM_OPTIONAL_SUPPORTED

    namespace internal {

        struct conditional_binder {
            sqlite3_stmt* stmt = nullptr;
            int index = 1;

            explicit conditional_binder(sqlite3_stmt* stmt) : stmt{stmt} {}

            template<class T, satisfies<is_bindable, T> = true>
            void operator()(const T& t) {
                int rc = statement_binder<T>{}.bind(this->stmt, this->index++, t);
                if(SQLITE_OK != rc) {
                    throw_translated_sqlite_error(this->stmt);
                }
            }

            template<class T, satisfies_not<is_bindable, T> = true>
            void operator()(const T&) const {}
        };

        struct field_value_binder : conditional_binder {
            using conditional_binder::conditional_binder;
            using conditional_binder::operator();

            template<class T, satisfies_not<is_bindable, T> = true>
            void operator()(const T&) const = delete;

            template<class T>
            void operator()(const T* value) {
                if(!value) {
                    throw std::system_error{orm_error_code::value_is_null};
                }
                (*this)(*value);
            }
        };

        struct tuple_value_binder {
            sqlite3_stmt* stmt = nullptr;

            explicit tuple_value_binder(sqlite3_stmt* stmt) : stmt{stmt} {}

            template<class Tpl, class Projection>
            void operator()(const Tpl& tpl, Projection project) const {
                (*this)(tpl,
                        std::make_index_sequence<std::tuple_size<Tpl>::value>{},
                        std::forward<Projection>(project));
            }

          private:
#ifdef SQLITE_ORM_FOLD_EXPRESSIONS_SUPPORTED
            template<class Tpl, size_t... Idx, class Projection>
            void operator()(const Tpl& tpl, std::index_sequence<Idx...>, Projection project) const {
                (this->bind(polyfill::invoke(project, std::get<Idx>(tpl)), Idx), ...);
            }
#else
            template<class Tpl, size_t... Idx, class Projection>
            void operator()(const Tpl& tpl, std::index_sequence<Idx...>, Projection project) const {
                using Sink = int[sizeof...(Idx)];
                (void)Sink{(this->bind(polyfill::invoke(project, std::get<Idx>(tpl)), Idx), 0)...};
            }
#endif

            template<class T>
            void bind(const T& t, size_t idx) const {
                int rc = statement_binder<T>{}.bind(this->stmt, int(idx + 1), t);
                if(SQLITE_OK != rc) {
                    throw_translated_sqlite_error(this->stmt);
                }
            }

            template<class T>
            void bind(const T* value, size_t idx) const {
                if(!value) {
                    throw std::system_error{orm_error_code::value_is_null};
                }
                (*this)(*value, idx);
            }
        };

        template<class Tpl>
        using bindable_filter_t = filter_tuple_t<Tpl, is_bindable>;
    }
}
#pragma once

#include "sqlite3.h"
#include <type_traits>  //  std::enable_if_t, std::is_arithmetic, std::is_same, std::enable_if
#include <stdlib.h>  //  atof, atoi, atoll
#include <system_error>  //  std::system_error
#include <string>  //  std::string, std::wstring
#ifndef SQLITE_ORM_OMITS_CODECVT
#include <locale>  // std::wstring_convert
#include <codecvt>  //  std::codecvt_utf8_utf16
#endif
#include <vector>  //  std::vector
#include <cstring>  //  strlen
#include <algorithm>  //  std::copy
#include <iterator>  //  std::back_inserter
#include <tuple>  //  std::tuple, std::tuple_size, std::tuple_element
#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
#include <concepts>
#endif

// #include "functional/cxx_universal.h"

// #include "functional/cxx_functional_polyfill.h"

// #include "functional/static_magic.h"

#ifndef SQLITE_ORM_IF_CONSTEXPR_SUPPORTED
#include <type_traits>  //  std::false_type, std::true_type, std::integral_constant
#endif
#include <utility>  //  std::forward

namespace sqlite_orm {

    //  got from here
    //  https://stackoverflow.com/questions/37617677/implementing-a-compile-time-static-if-logic-for-different-string-types-in-a-co
    namespace internal {

        // note: this is a class template accompanied with a variable template because older compilers (e.g. VC 2017)
        // cannot handle a static lambda variable inside a template function
        template<class R>
        struct empty_callable_t {
            template<class... Args>
            R operator()(Args&&...) const {
                return R();
            }
        };
        template<class R = void>
        constexpr empty_callable_t<R> empty_callable{};

#ifdef SQLITE_ORM_IF_CONSTEXPR_SUPPORTED
        template<bool B, typename T, typename F>
        decltype(auto) static_if([[maybe_unused]] T&& trueFn, [[maybe_unused]] F&& falseFn) {
            if constexpr(B) {
                return std::forward<T>(trueFn);
            } else {
                return std::forward<F>(falseFn);
            }
        }

        template<bool B, typename T>
        decltype(auto) static_if([[maybe_unused]] T&& trueFn) {
            if constexpr(B) {
                return std::forward<T>(trueFn);
            } else {
                return empty_callable<>;
            }
        }

        template<bool B, typename L, typename... Args>
        void call_if_constexpr([[maybe_unused]] L&& lambda, [[maybe_unused]] Args&&... args) {
            if constexpr(B) {
                lambda(std::forward<Args>(args)...);
            }
        }
#else
        template<typename T, typename F>
        decltype(auto) static_if(std::true_type, T&& trueFn, const F&) {
            return std::forward<T>(trueFn);
        }

        template<typename T, typename F>
        decltype(auto) static_if(std::false_type, const T&, F&& falseFn) {
            return std::forward<F>(falseFn);
        }

        template<bool B, typename T, typename F>
        decltype(auto) static_if(T&& trueFn, F&& falseFn) {
            return static_if(std::integral_constant<bool, B>{}, std::forward<T>(trueFn), std::forward<F>(falseFn));
        }

        template<bool B, typename T>
        decltype(auto) static_if(T&& trueFn) {
            return static_if(std::integral_constant<bool, B>{}, std::forward<T>(trueFn), empty_callable<>);
        }

        template<bool B, typename L, typename... Args>
        void call_if_constexpr(L&& lambda, Args&&... args) {
            static_if<B>(std::forward<L>(lambda))(std::forward<Args>(args)...);
        }
#endif
    }

}

// #include "tuple_helper/tuple_transformer.h"

// #include "column_result_proxy.h"

// #include "type_traits.h"

// #include "table_reference.h"

namespace sqlite_orm {
    namespace internal {

        /*
         *  Holder for the type of an unmapped aggregate/structure/object to be constructed ad-hoc from column results.
         *  `T` must be constructible using direct-list-initialization.
         */
        template<class T, class ColResults>
        struct structure {
            using type = T;
        };
    }
}

namespace sqlite_orm {
    namespace internal {

        template<class T, class SFINAE = void>
        struct column_result_proxy : std::remove_const<T> {};

        /*
         *  Unwrap `table_reference`
         */
        template<class P>
        struct column_result_proxy<P, match_if<is_table_reference, P>> : decay_table_ref<P> {};

        /*
         *  Pass through `structure`
         */
        template<class P>
        struct column_result_proxy<P, match_specialization_of<P, structure>> : P {};

        template<class T>
        using column_result_proxy_t = typename column_result_proxy<T>::type;
    }
}

// #include "arithmetic_tag.h"

// #include "pointer_value.h"

// #include "journal_mode.h"

#include <iterator>  //  std::back_inserter
#include <string>  //  std::string
#include <memory>  //  std::unique_ptr
#include <array>  //  std::array
#include <algorithm>  //  std::transform
#include <cctype>  // std::toupper

#if defined(_WINNT_)
// DELETE is a macro defined in the Windows SDK (winnt.h)
#pragma push_macro("DELETE")
#undef DELETE
#endif

namespace sqlite_orm {

    /**
     *  Caps case because of:
     *  1) delete keyword;
     *  2) https://www.sqlite.org/pragma.html#pragma_journal_mode original spelling
     */
    enum class journal_mode : signed char {
        DELETE = 0,
        // An alternate enumeration value when using the Windows SDK that defines DELETE as a macro.
        DELETE_ = DELETE,
        TRUNCATE = 1,
        PERSIST = 2,
        MEMORY = 3,
        WAL = 4,
        OFF = 5,
    };

    namespace internal {

        inline const std::string& to_string(journal_mode j) {
            static std::string res[] = {
                "DELETE",
                "TRUNCATE",
                "PERSIST",
                "MEMORY",
                "WAL",
                "OFF",
            };
            return res[static_cast<int>(j)];
        }

        inline std::unique_ptr<journal_mode> journal_mode_from_string(const std::string& str) {
            std::string upper_str;
            std::transform(str.begin(), str.end(), std::back_inserter(upper_str), [](char c) {
                return static_cast<char>(std::toupper(static_cast<int>(c)));
            });
            static std::array<journal_mode, 6> all = {{
                journal_mode::DELETE,
                journal_mode::TRUNCATE,
                journal_mode::PERSIST,
                journal_mode::MEMORY,
                journal_mode::WAL,
                journal_mode::OFF,
            }};
            for(auto j: all) {
                if(to_string(j) == upper_str) {
                    return std::make_unique<journal_mode>(j);
                }
            }
            return {};
        }
    }
}

#if defined(_WINNT_)
#pragma pop_macro("DELETE")
#endif

// #include "error_code.h"

// #include "is_std_ptr.h"

// #include "type_traits.h"

namespace sqlite_orm {

    /**
     *  Helper for casting values originating from SQL to C++ typed values, usually from rows of a result set.
     *  
     *  sqlite_orm provides specializations for known C++ types, users may define their custom specialization
     *  of this helper.
     *  
     *  @note (internal): Since row extractors are used in certain contexts with only one purpose at a time
     *                    (e.g., converting a row result set but not function values or column text),
     *                    there are factory functions that perform conceptual checking that should be used
     *                    instead of directly creating row extractors.
     *  
     *  
     */
    template<class V, typename Enable = void>
    struct row_extractor {
        /*
         *  Called during one-step query execution (one result row) for each column of a result row.
         */
        V extract(const char* columnText) const = delete;

        /*
         *  Called during multi-step query execution (result set) for each column of a result row.
         */
        V extract(sqlite3_stmt* stmt, int columnIndex) const = delete;

        /*
         *  Called before invocation of user-defined scalar or aggregate functions,
         *  in order to unbox dynamically typed SQL function values into a tuple of C++ function arguments.
         */
        V extract(sqlite3_value* value) const = delete;
    };

#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
    template<typename T>
    concept orm_column_text_extractable = requires(const row_extractor<T>& extractor, const char* columnText) {
        { extractor.extract(columnText) } -> std::same_as<T>;
    };

    template<typename T>
    concept orm_row_value_extractable =
        requires(const row_extractor<T>& extractor, sqlite3_stmt* stmt, int columnIndex) {
            { extractor.extract(stmt, columnIndex) } -> std::same_as<T>;
        };

    template<typename T>
    concept orm_boxed_value_extractable = requires(const row_extractor<T>& extractor, sqlite3_value* value) {
        { extractor.extract(value) } -> std::same_as<T>;
    };
#endif

    namespace internal {
        /*  
         *  Make a row extractor to be used for casting SQL column text to a C++ typed value.
         */
        template<class R>
#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
            requires(orm_column_text_extractable<R>)
#endif
        row_extractor<R> column_text_extractor() {
            return {};
        }

        /*  
         *  Make a row extractor to be used for converting a value from a SQL result row set to a C++ typed value.
         */
        template<class R>
#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
            requires(orm_row_value_extractable<R>)
#endif
        row_extractor<R> row_value_extractor() {
            return {};
        }

        /*  
         *  Make a row extractor to be used for unboxing a dynamically typed SQL value to a C++ typed value.
         */
        template<class R>
#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
            requires(orm_boxed_value_extractable<R>)
#endif
        row_extractor<R> boxed_value_extractor() {
            return {};
        }
    }

    template<class R>
    int extract_single_value(void* data, int argc, char** argv, char**) {
        auto& res = *(R*)data;
        if(argc) {
            const auto rowExtractor = internal::column_text_extractor<R>();
            res = rowExtractor.extract(argv[0]);
        }
        return 0;
    }

#if SQLITE_VERSION_NUMBER >= 3020000
    /**
     *  Specialization for the 'pointer-passing interface'.
     * 
     *  @note The 'pointer-passing' interface doesn't support (and in fact prohibits)
     *  extracting pointers from columns.
     */
    template<class P, class T>
    struct row_extractor<pointer_arg<P, T>, void> {
        using V = pointer_arg<P, T>;

        V extract(const char* columnText) const = delete;

        V extract(sqlite3_stmt* stmt, int columnIndex) const = delete;

        V extract(sqlite3_value* value) const {
            return {(P*)sqlite3_value_pointer(value, T::value)};
        }
    };

    /**
     * Undefine using pointer_binding<> for querying values
     */
    template<class P, class T, class D>
    struct row_extractor<pointer_binding<P, T, D>, void>;
#endif

    /**
     *  Specialization for arithmetic types.
     */
    template<class V>
    struct row_extractor<V, std::enable_if_t<std::is_arithmetic<V>::value>> {
        V extract(const char* columnText) const {
            return this->extract(columnText, tag());
        }

        V extract(sqlite3_stmt* stmt, int columnIndex) const {
            return this->extract(stmt, columnIndex, tag());
        }

        V extract(sqlite3_value* value) const {
            return this->extract(value, tag());
        }

      private:
        using tag = arithmetic_tag_t<V>;

        V extract(const char* columnText, const int_or_smaller_tag&) const {
            return static_cast<V>(atoi(columnText));
        }

        V extract(sqlite3_stmt* stmt, int columnIndex, const int_or_smaller_tag&) const {
            return static_cast<V>(sqlite3_column_int(stmt, columnIndex));
        }

        V extract(sqlite3_value* value, const int_or_smaller_tag&) const {
            return static_cast<V>(sqlite3_value_int(value));
        }

        V extract(const char* columnText, const bigint_tag&) const {
            return static_cast<V>(atoll(columnText));
        }

        V extract(sqlite3_stmt* stmt, int columnIndex, const bigint_tag&) const {
            return static_cast<V>(sqlite3_column_int64(stmt, columnIndex));
        }

        V extract(sqlite3_value* value, const bigint_tag&) const {
            return static_cast<V>(sqlite3_value_int64(value));
        }

        V extract(const char* columnText, const real_tag&) const {
            return static_cast<V>(atof(columnText));
        }

        V extract(sqlite3_stmt* stmt, int columnIndex, const real_tag&) const {
            return static_cast<V>(sqlite3_column_double(stmt, columnIndex));
        }

        V extract(sqlite3_value* value, const real_tag&) const {
            return static_cast<V>(sqlite3_value_double(value));
        }
    };

    /**
     *  Specialization for std::string.
     */
    template<class T>
    struct row_extractor<T, std::enable_if_t<std::is_base_of<std::string, T>::value>> {
        T extract(const char* columnText) const {
            if(columnText) {
                return columnText;
            } else {
                return {};
            }
        }

        T extract(sqlite3_stmt* stmt, int columnIndex) const {
            if(auto cStr = (const char*)sqlite3_column_text(stmt, columnIndex)) {
                return cStr;
            } else {
                return {};
            }
        }

        T extract(sqlite3_value* value) const {
            if(auto cStr = (const char*)sqlite3_value_text(value)) {
                return cStr;
            } else {
                return {};
            }
        }
    };
#ifndef SQLITE_ORM_OMITS_CODECVT
    /**
     *  Specialization for std::wstring.
     */
    template<>
    struct row_extractor<std::wstring, void> {
        std::wstring extract(const char* columnText) const {
            if(columnText) {
                std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
                return converter.from_bytes(columnText);
            } else {
                return {};
            }
        }

        std::wstring extract(sqlite3_stmt* stmt, int columnIndex) const {
            auto cStr = (const char*)sqlite3_column_text(stmt, columnIndex);
            if(cStr) {
                std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
                return converter.from_bytes(cStr);
            } else {
                return {};
            }
        }

        std::wstring extract(sqlite3_value* value) const {
            if(auto cStr = (const wchar_t*)sqlite3_value_text16(value)) {
                return cStr;
            } else {
                return {};
            }
        }
    };
#endif  //  SQLITE_ORM_OMITS_CODECVT

    template<class V>
    struct row_extractor<V, std::enable_if_t<is_std_ptr<V>::value>> {
        using unqualified_type = std::remove_cv_t<typename V::element_type>;

        V extract(const char* columnText) const
#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
            requires(orm_column_text_extractable<unqualified_type>)
#endif
        {
            if(columnText) {
                const row_extractor<unqualified_type> rowExtractor{};
                return is_std_ptr<V>::make(rowExtractor.extract(columnText));
            } else {
                return {};
            }
        }

        V extract(sqlite3_stmt* stmt, int columnIndex) const
#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
            requires(orm_row_value_extractable<unqualified_type>)
#endif
        {
            auto type = sqlite3_column_type(stmt, columnIndex);
            if(type != SQLITE_NULL) {
                const row_extractor<unqualified_type> rowExtractor{};
                return is_std_ptr<V>::make(rowExtractor.extract(stmt, columnIndex));
            } else {
                return {};
            }
        }

        V extract(sqlite3_value* value) const
#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
            requires(orm_boxed_value_extractable<unqualified_type>)
#endif
        {
            auto type = sqlite3_value_type(value);
            if(type != SQLITE_NULL) {
                const row_extractor<unqualified_type> rowExtractor{};
                return is_std_ptr<V>::make(rowExtractor.extract(value));
            } else {
                return {};
            }
        }
    };

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
    template<class V>
    struct row_extractor<V, std::enable_if_t<polyfill::is_specialization_of_v<V, std::optional>>> {
        using unqualified_type = std::remove_cv_t<typename V::value_type>;

        V extract(const char* columnText) const
#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
            requires(orm_column_text_extractable<unqualified_type>)
#endif
        {
            if(columnText) {
                const row_extractor<unqualified_type> rowExtractor{};
                return std::make_optional(rowExtractor.extract(columnText));
            } else {
                return std::nullopt;
            }
        }

        V extract(sqlite3_stmt* stmt, int columnIndex) const
#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
            requires(orm_row_value_extractable<unqualified_type>)
#endif
        {
            auto type = sqlite3_column_type(stmt, columnIndex);
            if(type != SQLITE_NULL) {
                const row_extractor<unqualified_type> rowExtractor{};
                return std::make_optional(rowExtractor.extract(stmt, columnIndex));
            } else {
                return std::nullopt;
            }
        }

        V extract(sqlite3_value* value) const
#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
            requires(orm_boxed_value_extractable<unqualified_type>)
#endif
        {
            auto type = sqlite3_value_type(value);
            if(type != SQLITE_NULL) {
                const row_extractor<unqualified_type> rowExtractor{};
                return std::make_optional(rowExtractor.extract(value));
            } else {
                return std::nullopt;
            }
        }
    };
#endif  //  SQLITE_ORM_OPTIONAL_SUPPORTED

    template<>
    struct row_extractor<nullptr_t, void> {
        nullptr_t extract(const char* /*columnText*/) const {
            return nullptr;
        }

        nullptr_t extract(sqlite3_stmt*, int /*columnIndex*/) const {
            return nullptr;
        }

        nullptr_t extract(sqlite3_value*) const {
            return nullptr;
        }
    };
    /**
     *  Specialization for std::vector<char>.
     */
    template<>
    struct row_extractor<std::vector<char>, void> {
        std::vector<char> extract(const char* columnText) const {
            return {columnText, columnText + (columnText ? ::strlen(columnText) : 0)};
        }

        std::vector<char> extract(sqlite3_stmt* stmt, int columnIndex) const {
            auto bytes = static_cast<const char*>(sqlite3_column_blob(stmt, columnIndex));
            auto len = static_cast<size_t>(sqlite3_column_bytes(stmt, columnIndex));
            return {bytes, bytes + len};
        }

        std::vector<char> extract(sqlite3_value* value) const {
            auto bytes = static_cast<const char*>(sqlite3_value_blob(value));
            auto len = static_cast<size_t>(sqlite3_value_bytes(value));
            return {bytes, bytes + len};
        }
    };

    /**
     *  Specialization for journal_mode.
     */
    template<>
    struct row_extractor<journal_mode, void> {
        journal_mode extract(const char* columnText) const {
            if(columnText) {
                if(auto res = internal::journal_mode_from_string(columnText)) {
                    return std::move(*res);
                } else {
                    throw std::system_error{orm_error_code::incorrect_journal_mode_string};
                }
            } else {
                throw std::system_error{orm_error_code::incorrect_journal_mode_string};
            }
        }

        journal_mode extract(sqlite3_stmt* stmt, int columnIndex) const {
            auto cStr = (const char*)sqlite3_column_text(stmt, columnIndex);
            return this->extract(cStr);
        }

        journal_mode extract(sqlite3_value* value) const = delete;
    };

    namespace internal {

        /*
         *  Helper to extract a structure from a rowset.
         */
        template<class R, class DBOs>
        struct struct_extractor;

#ifdef SQLITE_ORM_IF_CONSTEXPR_SUPPORTED
        /*  
         *  Returns a value-based row extractor for an unmapped type,
         *  returns a structure extractor for a table reference, tuple or named struct.
         */
        template<class R, class DBOs>
        auto make_row_extractor([[maybe_unused]] const DBOs& dbObjects) {
            if constexpr(polyfill::is_specialization_of_v<R, std::tuple> ||
                         polyfill::is_specialization_of_v<R, structure> || is_table_reference_v<R>) {
                return struct_extractor<R, DBOs>{dbObjects};
            } else {
                return row_value_extractor<R>();
            }
        }
#else
        /*  
         *  Overload for an unmapped type returns a common row extractor.
         */
        template<
            class R,
            class DBOs,
            std::enable_if_t<polyfill::negation<polyfill::disjunction<polyfill::is_specialization_of<R, std::tuple>,
                                                                      polyfill::is_specialization_of<R, structure>,
                                                                      is_table_reference<R>>>::value,
                             bool> = true>
        auto make_row_extractor(const DBOs& /*dbObjects*/) {
            return row_value_extractor<R>();
        }

        /*  
         *  Overload for a table reference, tuple or aggregate of column results returns a structure extractor.
         */
        template<class R,
                 class DBOs,
                 std::enable_if_t<polyfill::disjunction<polyfill::is_specialization_of<R, std::tuple>,
                                                        polyfill::is_specialization_of<R, structure>,
                                                        is_table_reference<R>>::value,
                                  bool> = true>
        struct_extractor<R, DBOs> make_row_extractor(const DBOs& dbObjects) {
            return {dbObjects};
        }
#endif

        /**
         *  Specialization for a tuple of top-level column results.
         */
        template<class DBOs, class... Args>
        struct struct_extractor<std::tuple<Args...>, DBOs> {
            const DBOs& db_objects;

            std::tuple<Args...> extract(const char* columnText) const = delete;

            // note: expects to be called only from the top level, and therefore discards the index
            std::tuple<column_result_proxy_t<Args>...> extract(sqlite3_stmt* stmt,
                                                               int&& /*nextColumnIndex*/ = 0) const {
                int columnIndex = -1;
                return {make_row_extractor<Args>(this->db_objects).extract(stmt, ++columnIndex)...};
            }

            // unused to date
            std::tuple<column_result_proxy_t<Args>...> extract(sqlite3_stmt* stmt, int& columnIndex) const = delete;

            std::tuple<Args...> extract(sqlite3_value* value) const = delete;
        };

        /**
         *  Specialization for an unmapped structure to be constructed ad-hoc from column results.
         *  
         *  This plays together with `column_result_of_t`, which returns `struct_t<O>` as `structure<O>`
         */
        template<class O, class... Args, class DBOs>
        struct struct_extractor<structure<O, std::tuple<Args...>>, DBOs> {
            const DBOs& db_objects;

            O extract(const char* columnText) const = delete;

            // note: expects to be called only from the top level, and therefore discards the index;
            // note: brace-init-list initialization guarantees order of evaluation, but only for aggregates and variadic constructors it seems.
            //       see unit test tests/prepared_statement_tests/select.cpp/TEST_CASE("Prepared select")/SECTION("non-aggregate struct")
            template<class Ox = O, satisfies<is_eval_order_garanteed, Ox> = true>
            O extract(sqlite3_stmt* stmt, int&& /*nextColumnIndex*/ = 0) const {
                int columnIndex = -1;
                return O{make_row_extractor<Args>(this->db_objects).extract(stmt, ++columnIndex)...};
            }

            template<class Ox = O, satisfies_not<is_eval_order_garanteed, Ox> = true>
            O extract(sqlite3_stmt* stmt, int&& /*nextColumnIndex*/ = 0) const {
                int columnIndex = -1;
                // note: brace-init-list initialization guarantees order of evaluation, but only for aggregates and variadic constructors it seems.
                std::tuple<Args...> t{make_row_extractor<Args>(this->db_objects).extract(stmt, ++columnIndex)...};
                return create_from_tuple<O>(std::move(t), std::index_sequence_for<Args...>{});
            }

            // note: brace-init-list initialization guarantees order of evaluation, but only for aggregates and variadic constructors it seems.
            //       see unit test tests/prepared_statement_tests/select.cpp/TEST_CASE("Prepared select")/SECTION("non-aggregate struct")
            template<class Ox = O, satisfies<is_eval_order_garanteed, Ox> = true>
            O extract(sqlite3_stmt* stmt, int& columnIndex) const {
                --columnIndex;
                return O{make_row_extractor<Args>(this->db_objects).extract(stmt, ++columnIndex)...};
            }

            template<class Ox = O, satisfies_not<is_eval_order_garanteed, Ox> = true>
            O extract(sqlite3_stmt* stmt, int& columnIndex) const {
                --columnIndex;
                // note: brace-init-list initialization guarantees order of evaluation, but only for aggregates and variadic constructors it seems.
                std::tuple<Args...> t{make_row_extractor<Args>(this->db_objects).extract(stmt, ++columnIndex)...};
                return create_from_tuple<O>(std::move(t), std::index_sequence_for<Args...>{});
            }

            O extract(sqlite3_value* value) const = delete;
        };
    }
}
#pragma once

#include <ostream>

namespace sqlite_orm {

    enum class sync_schema_result {

        /**
         *  created new table, table with the same tablename did not exist
         */
        new_table_created,

        /**
         *  table schema is the same as storage, nothing to be done
         */
        already_in_sync,

        /**
         *  removed excess columns in table (than storage) without dropping a table
         */
        old_columns_removed,

        /**
         *  lacking columns in table (than storage) added without dropping a table
         */
        new_columns_added,

        /**
         *  both old_columns_removed and new_columns_added
         */
        new_columns_added_and_old_columns_removed,

        /**
         *  old table is dropped and new is recreated. Reasons :
         *      1. delete excess columns in the table than storage if preseve = false
         *      2. Lacking columns in the table cannot be added due to NULL and DEFAULT constraint
         *      3. Reasons 1 and 2 both together
         *      4. data_type mismatch between table and storage.
         */
        dropped_and_recreated,
    };

    inline std::ostream& operator<<(std::ostream& os, sync_schema_result value) {
        switch(value) {
            case sync_schema_result::new_table_created:
                return os << "new table created";
            case sync_schema_result::already_in_sync:
                return os << "table and storage is already in sync.";
            case sync_schema_result::old_columns_removed:
                return os << "old excess columns removed";
            case sync_schema_result::new_columns_added:
                return os << "new columns added";
            case sync_schema_result::new_columns_added_and_old_columns_removed:
                return os << "old excess columns removed and new columns added";
            case sync_schema_result::dropped_and_recreated:
                return os << "old table dropped and recreated";
        }
        return os;
    }
}
#pragma once

#include <tuple>  //  std::tuple, std::make_tuple, std::declval, std::tuple_element_t
#include <string>  //  std::string
#include <utility>  //  std::forward

// #include "../functional/cxx_universal.h"

// #include "../tuple_helper/tuple_traits.h"

// #include "../indexed_column.h"

#include <string>  //  std::string
#include <utility>  //  std::move

// #include "functional/cxx_universal.h"

// #include "ast/where.h"

namespace sqlite_orm {

    namespace internal {

        template<class C>
        struct indexed_column_t {
            using column_type = C;

#ifndef SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
            indexed_column_t(column_type _column_or_expression) :
                column_or_expression(std::move(_column_or_expression)) {}
#endif

            column_type column_or_expression;
            std::string _collation_name;
            int _order = 0;  //  -1 = desc, 1 = asc, 0 = not specified

            indexed_column_t<column_type> collate(std::string name) {
                auto res = std::move(*this);
                res._collation_name = std::move(name);
                return res;
            }

            indexed_column_t<column_type> asc() {
                auto res = std::move(*this);
                res._order = 1;
                return res;
            }

            indexed_column_t<column_type> desc() {
                auto res = std::move(*this);
                res._order = -1;
                return res;
            }
        };

        template<class C>
        indexed_column_t<C> make_indexed_column(C col) {
            return {std::move(col)};
        }

        template<class C>
        where_t<C> make_indexed_column(where_t<C> wher) {
            return std::move(wher);
        }

        template<class C>
        indexed_column_t<C> make_indexed_column(indexed_column_t<C> col) {
            return std::move(col);
        }
    }

    /**
     * Use this function to specify indexed column inside `make_index` function call.
     * Example: make_index("index_name", indexed_column(&User::id).asc())
     */
    template<class C>
    internal::indexed_column_t<C> indexed_column(C column_or_expression) {
        return {std::move(column_or_expression)};
    }

}

// #include "../table_type_of.h"

namespace sqlite_orm {

    namespace internal {

        struct index_base {
            std::string name;
            bool unique = false;

#ifndef SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
            index_base(std::string name, bool unique) : name{std::move(name)}, unique{unique} {}
#endif
        };

        template<class T, class... Els>
        struct index_t : index_base {
            using elements_type = std::tuple<Els...>;
            using object_type = void;
            using table_mapped_type = T;

#ifndef SQLITE_ORM_AGGREGATE_BASES_SUPPORTED
            index_t(std::string name_, bool unique_, elements_type elements_) :
                index_base{std::move(name_), unique_}, elements(std::move(elements_)) {}
#endif

            elements_type elements;
        };
    }

    template<class T, class... Cols>
    internal::index_t<T, decltype(internal::make_indexed_column(std::declval<Cols>()))...> make_index(std::string name,
                                                                                                      Cols... cols) {
        using cols_tuple = std::tuple<Cols...>;
        static_assert(internal::count_tuple<cols_tuple, internal::is_where>::value <= 1,
                      "amount of where arguments can be 0 or 1");
        SQLITE_ORM_CLANG_SUPPRESS_MISSING_BRACES(
            return {std::move(name), false, std::make_tuple(internal::make_indexed_column(std::move(cols))...)});
    }

    template<class... Cols>
    internal::index_t<internal::table_type_of_t<typename std::tuple_element_t<0, std::tuple<Cols...>>>,
                      decltype(internal::make_indexed_column(std::declval<Cols>()))...>
    make_index(std::string name, Cols... cols) {
        using cols_tuple = std::tuple<Cols...>;
        static_assert(internal::count_tuple<cols_tuple, internal::is_where>::value <= 1,
                      "amount of where arguments can be 0 or 1");
        SQLITE_ORM_CLANG_SUPPRESS_MISSING_BRACES(
            return {std::move(name), false, std::make_tuple(internal::make_indexed_column(std::move(cols))...)});
    }

    template<class... Cols>
    internal::index_t<internal::table_type_of_t<typename std::tuple_element_t<0, std::tuple<Cols...>>>,
                      decltype(internal::make_indexed_column(std::declval<Cols>()))...>
    make_unique_index(std::string name, Cols... cols) {
        using cols_tuple = std::tuple<Cols...>;
        static_assert(internal::count_tuple<cols_tuple, internal::is_where>::value <= 1,
                      "amount of where arguments can be 0 or 1");
        SQLITE_ORM_CLANG_SUPPRESS_MISSING_BRACES(
            return {std::move(name), true, std::make_tuple(internal::make_indexed_column(std::move(cols))...)});
    }
}
#pragma once

#include <string>  //  std::string

namespace sqlite_orm {

    namespace internal {

        struct rowid_t {
            operator std::string() const {
                return "rowid";
            }
        };

        struct oid_t {
            operator std::string() const {
                return "oid";
            }
        };

        struct _rowid_t {
            operator std::string() const {
                return "_rowid_";
            }
        };

        template<class T>
        struct table_rowid_t : public rowid_t {
            using type = T;
        };

        template<class T>
        struct table_oid_t : public oid_t {
            using type = T;
        };
        template<class T>
        struct table__rowid_t : public _rowid_t {
            using type = T;
        };

    }

    inline internal::rowid_t rowid() {
        return {};
    }

    inline internal::oid_t oid() {
        return {};
    }

    inline internal::_rowid_t _rowid_() {
        return {};
    }

    template<class T>
    internal::table_rowid_t<T> rowid() {
        return {};
    }

    template<class T>
    internal::table_oid_t<T> oid() {
        return {};
    }

    template<class T>
    internal::table__rowid_t<T> _rowid_() {
        return {};
    }
}
#pragma once

#include <string>  //  std::string
#include <type_traits>  //  std::remove_const, std::is_member_pointer, std::true_type, std::false_type
#include <vector>  //  std::vector
#include <tuple>  //  std::tuple_element
#include <utility>  //  std::forward, std::move

// #include "../functional/cxx_universal.h"
//  ::size_t
// #include "../functional/cxx_type_traits_polyfill.h"

// #include "../functional/cxx_functional_polyfill.h"

// #include "../functional/static_magic.h"

// #include "../functional/mpl.h"

// #include "../functional/index_sequence_util.h"

// #include "../tuple_helper/tuple_filter.h"

// #include "../tuple_helper/tuple_traits.h"

// #include "../tuple_helper/tuple_iteration.h"

// #include "../tuple_helper/tuple_transformer.h"

// #include "../member_traits/member_traits.h"

// #include "../typed_comparator.h"

namespace sqlite_orm {

    namespace internal {

        template<class L, class R>
        bool compare_any(const L& /*lhs*/, const R& /*rhs*/) {
            return false;
        }
        template<class O>
        bool compare_any(const O& lhs, const O& rhs) {
            return lhs == rhs;
        }
    }
}

// #include "../type_traits.h"

// #include "../alias_traits.h"

// #include "../constraints.h"

// #include "../table_info.h"

// #include "column.h"

namespace sqlite_orm {

    namespace internal {

        template<class T>
        using is_table_element_or_constraint = mpl::invoke_t<mpl::disjunction<check_if<is_column>,
                                                                              check_if<is_primary_key>,
                                                                              check_if<is_foreign_key>,
                                                                              check_if_is_template<index_t>,
                                                                              check_if_is_template<unique_t>,
                                                                              check_if_is_template<check_t>,
                                                                              check_if_is_template<prefix_t>,
                                                                              check_if_is_template<tokenize_t>,
                                                                              check_if_is_template<content_t>,
                                                                              check_if_is_template<table_content_t>>,
                                                             T>;

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
        /**
         *  A subselect mapper's CTE moniker, void otherwise.
         */
        template<typename O>
        using moniker_of_or_void_t = polyfill::detected_or_t<void, cte_moniker_type_t, O>;

        /** 
         *  If O is a subselect_mapper then returns its nested type name O::cte_moniker_type,
         *  otherwise O itself is a regular object type to be mapped.
         */
        template<typename O>
        using mapped_object_type_for_t = polyfill::detected_or_t<O, cte_moniker_type_t, O>;
#endif

        struct basic_table {

            /**
             *  Table name.
             */
            std::string name;
        };

        /**
         *  Table definition.
         */
        template<class O, bool WithoutRowId, class... Cs>
        struct table_t : basic_table {
#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
            // this typename is used in contexts where it is known that the 'table' holds a subselect_mapper
            // instead of a regular object type
            using cte_mapper_type = O;
            using cte_moniker_type = moniker_of_or_void_t<O>;
            using object_type = mapped_object_type_for_t<O>;
#else
            using object_type = O;
#endif
            using elements_type = std::tuple<Cs...>;

            static constexpr bool is_without_rowid_v = WithoutRowId;

            using is_without_rowid = polyfill::bool_constant<is_without_rowid_v>;

            elements_type elements;

#ifndef SQLITE_ORM_AGGREGATE_BASES_SUPPORTED
            table_t(std::string name_, elements_type elements_) :
                basic_table{std::move(name_)}, elements{std::move(elements_)} {}
#endif

            table_t<O, true, Cs...> without_rowid() const {
                return {this->name, this->elements};
            }

            /*
             *  Returns the number of elements of the specified type.
             */
            template<template<class...> class Trait>
            static constexpr int count_of() {
                using sequence_of = filter_tuple_sequence_t<elements_type, Trait>;
                return int(sequence_of::size());
            }

            /*
             *  Returns the number of columns having the specified constraint trait.
             */
            template<template<class...> class Trait>
            static constexpr int count_of_columns_with() {
                using filtered_index_sequence = col_index_sequence_with<elements_type, Trait>;
                return int(filtered_index_sequence::size());
            }

            /*
             *  Returns the number of columns having the specified constraint trait.
             */
            template<template<class...> class Trait>
            static constexpr int count_of_columns_excluding() {
                using excluded_col_index_sequence = col_index_sequence_excluding<elements_type, Trait>;
                return int(excluded_col_index_sequence::size());
            }

            /**
             *  Function used to get field value from object by mapped member pointer/setter/getter.
             *  
             *  For a setter the corresponding getter has to be searched,
             *  so the method returns a pointer to the field as returned by the found getter.
             *  Otherwise the method invokes the member pointer and returns its result.
             */
            template<class M, satisfies_not<is_setter, M> = true>
            decltype(auto) object_field_value(const object_type& object, M memberPointer) const {
                return polyfill::invoke(memberPointer, object);
            }

            template<class M, satisfies<is_setter, M> = true>
            const member_field_type_t<M>* object_field_value(const object_type& object, M memberPointer) const {
                using field_type = member_field_type_t<M>;
                const field_type* res = nullptr;
                iterate_tuple(this->elements,
                              col_index_sequence_with_field_type<elements_type, field_type>{},
                              call_as_template_base<column_field>([&res, &memberPointer, &object](const auto& column) {
                                  if(compare_any(column.setter, memberPointer)) {
                                      res = &polyfill::invoke(column.member_pointer, object);
                                  }
                              }));
                return res;
            }

            const basic_generated_always::storage_type*
            find_column_generated_storage_type(const std::string& name) const {
                const basic_generated_always::storage_type* result = nullptr;
#if SQLITE_VERSION_NUMBER >= 3031000
                iterate_tuple(this->elements,
                              col_index_sequence_with<elements_type, is_generated_always>{},
                              [&result, &name](auto& column) {
                                  if(column.name != name) {
                                      return;
                                  }
                                  using generated_op_index_sequence =
                                      filter_tuple_sequence_t<std::remove_const_t<decltype(column.constraints)>,
                                                              is_generated_always>;
                                  constexpr size_t opIndex = index_sequence_value_at<0>(generated_op_index_sequence{});
                                  result = &std::get<opIndex>(column.constraints).storage;
                              });
#else
                (void)name;
#endif
                return result;
            }

            /**
             *  Call passed lambda with all defined primary keys.
             */
            template<class L>
            void for_each_primary_key(L&& lambda) const {
                using pk_index_sequence = filter_tuple_sequence_t<elements_type, is_primary_key>;
                iterate_tuple(this->elements, pk_index_sequence{}, lambda);
            }

            std::vector<std::string> composite_key_columns_names() const {
                std::vector<std::string> res;
                this->for_each_primary_key([this, &res](auto& primaryKey) {
                    res = this->composite_key_columns_names(primaryKey);
                });
                return res;
            }

            std::vector<std::string> primary_key_column_names() const {
                using pkcol_index_sequence = col_index_sequence_with<elements_type, is_primary_key>;

                if(pkcol_index_sequence::size() > 0) {
                    return create_from_tuple<std::vector<std::string>>(this->elements,
                                                                       pkcol_index_sequence{},
                                                                       &column_identifier::name);
                } else {
                    return this->composite_key_columns_names();
                }
            }

            template<class L>
            void for_each_primary_key_column(L&& lambda) const {
                iterate_tuple(this->elements,
                              col_index_sequence_with<elements_type, is_primary_key>{},
                              call_as_template_base<column_field>([&lambda](const auto& column) {
                                  lambda(column.member_pointer);
                              }));
                this->for_each_primary_key([&lambda](auto& primaryKey) {
                    iterate_tuple(primaryKey.columns, lambda);
                });
            }

            template<class... Args>
            std::vector<std::string> composite_key_columns_names(const primary_key_t<Args...>& primaryKey) const {
                return create_from_tuple<std::vector<std::string>>(primaryKey.columns,
                                                                   [this, empty = std::string{}](auto& memberPointer) {
                                                                       if(const std::string* columnName =
                                                                              this->find_column_name(memberPointer)) {
                                                                           return *columnName;
                                                                       } else {
                                                                           return empty;
                                                                       }
                                                                   });
            }

            /**
             *  Searches column name by class member pointer passed as the first argument.
             *  @return column name or empty string if nothing found.
             */
            template<class M, satisfies<std::is_member_pointer, M> = true>
            const std::string* find_column_name(M m) const {
                const std::string* res = nullptr;
                using field_type = member_field_type_t<M>;
                iterate_tuple(this->elements,
                              col_index_sequence_with_field_type<elements_type, field_type>{},
                              [&res, m](auto& c) {
                                  if(compare_any(c.member_pointer, m) || compare_any(c.setter, m)) {
                                      res = &c.name;
                                  }
                              });
                return res;
            }

            /**
             *  Call passed lambda with all defined foreign keys.
             *  @param lambda Lambda called for each column. Function signature: `void(auto& column)`
             */
            template<class L>
            void for_each_foreign_key(L&& lambda) const {
                using fk_index_sequence = filter_tuple_sequence_t<elements_type, is_foreign_key>;
                iterate_tuple(this->elements, fk_index_sequence{}, lambda);
            }

            template<class Target, class L>
            void for_each_foreign_key_to(L&& lambda) const {
                using fk_index_sequence = filter_tuple_sequence_t<elements_type, is_foreign_key>;
                using filtered_index_sequence = filter_tuple_sequence_t<elements_type,
                                                                        check_if_is_type<Target>::template fn,
                                                                        target_type_t,
                                                                        fk_index_sequence>;
                iterate_tuple(this->elements, filtered_index_sequence{}, lambda);
            }

            /**
             *  Call passed lambda with all defined columns.
             *  @param lambda Lambda called for each column. Function signature: `void(auto& column)`
             */
            template<class L>
            void for_each_column(L&& lambda) const {
                using col_index_sequence = filter_tuple_sequence_t<elements_type, is_column>;
                iterate_tuple(this->elements, col_index_sequence{}, lambda);
            }

            /**
             *  Call passed lambda with columns not having the specified constraint trait `OpTrait`.
             *  @param lambda Lambda called for each column.
             */
            template<template<class...> class OpTraitFn, class L>
            void for_each_column_excluding(L&& lambda) const {
                iterate_tuple(this->elements, col_index_sequence_excluding<elements_type, OpTraitFn>{}, lambda);
            }

            /**
             *  Call passed lambda with columns not having the specified constraint trait `OpTrait`.
             *  @param lambda Lambda called for each column.
             */
            template<class OpTraitQ, class L, satisfies<mpl::is_quoted_metafuntion, OpTraitQ> = true>
            void for_each_column_excluding(L&& lambda) const {
                this->template for_each_column_excluding<OpTraitQ::template fn>(lambda);
            }

            std::vector<table_xinfo> get_table_info() const;
        };

        template<class T>
        struct is_table : std::false_type {};

        template<class O, bool W, class... Cs>
        struct is_table<table_t<O, W, Cs...>> : std::true_type {};

        template<class M>
        struct virtual_table_t : basic_table {
            using module_details_type = M;
            using object_type = typename module_details_type::object_type;
            using elements_type = typename module_details_type::columns_type;

            static constexpr bool is_without_rowid_v = false;
            using is_without_rowid = polyfill::bool_constant<is_without_rowid_v>;

            module_details_type module_details;

#ifndef SQLITE_ORM_AGGREGATE_BASES_SUPPORTED
            virtual_table_t(std::string name, module_details_type module_details) :
                basic_table{std::move(name)}, module_details{std::move(module_details)} {}
#endif

            /**
             *  Call passed lambda with columns not having the specified constraint trait `OpTrait`.
             *  @param lambda Lambda called for each column.
             */
            template<template<class...> class OpTraitFn, class L>
            void for_each_column_excluding(L&& lambda) const {
                this->module_details.template for_each_column_excluding<OpTraitFn>(lambda);
            }

            /**
             *  Call passed lambda with columns not having the specified constraint trait `OpTrait`.
             *  @param lambda Lambda called for each column.
             */
            template<class OpTraitQ, class L, satisfies<mpl::is_quoted_metafuntion, OpTraitQ> = true>
            void for_each_column_excluding(L&& lambda) const {
                this->module_details.template for_each_column_excluding<OpTraitQ>(lambda);
            }

            /**
             *  Call passed lambda with all defined columns.
             *  @param lambda Lambda called for each column. Function signature: `void(auto& column)`
             */
            template<class L>
            void for_each_column(L&& lambda) const {
                this->module_details.for_each_column(lambda);
            }
        };

        template<class T>
        struct is_virtual_table : std::false_type {};

        template<class M>
        struct is_virtual_table<virtual_table_t<M>> : std::true_type {};

#if SQLITE_VERSION_NUMBER >= 3009000
        template<class T, class... Cs>
        struct using_fts5_t {
            using object_type = T;
            using columns_type = std::tuple<Cs...>;

            columns_type columns;

            using_fts5_t(columns_type columns) : columns(std::move(columns)) {}

            /**
             *  Call passed lambda with columns not having the specified constraint trait `OpTrait`.
             *  @param lambda Lambda called for each column.
             */
            template<template<class...> class OpTraitFn, class L>
            void for_each_column_excluding(L&& lambda) const {
                iterate_tuple(this->columns, col_index_sequence_excluding<columns_type, OpTraitFn>{}, lambda);
            }

            /**
             *  Call passed lambda with columns not having the specified constraint trait `OpTrait`.
             *  @param lambda Lambda called for each column.
             */
            template<class OpTraitQ, class L, satisfies<mpl::is_quoted_metafuntion, OpTraitQ> = true>
            void for_each_column_excluding(L&& lambda) const {
                this->template for_each_column_excluding<OpTraitQ::template fn>(lambda);
            }

            /**
             *  Call passed lambda with all defined columns.
             *  @param lambda Lambda called for each column. Function signature: `void(auto& column)`
             */
            template<class L>
            void for_each_column(L&& lambda) const {
                using col_index_sequence = filter_tuple_sequence_t<columns_type, is_column>;
                iterate_tuple(this->columns, col_index_sequence{}, lambda);
            }
        };
#endif

        template<class O, bool WithoutRowId, class... Cs, class G, class S>
        bool exists_in_composite_primary_key(const table_t<O, WithoutRowId, Cs...>& table,
                                             const column_field<G, S>& column) {
            bool res = false;
            table.for_each_primary_key([&column, &res](auto& primaryKey) {
                using colrefs_tuple = decltype(primaryKey.columns);
                using same_type_index_sequence =
                    filter_tuple_sequence_t<colrefs_tuple,
                                            check_if_is_type<member_field_type_t<G>>::template fn,
                                            member_field_type_t>;
                iterate_tuple(primaryKey.columns, same_type_index_sequence{}, [&res, &column](auto& memberPointer) {
                    if(compare_any(memberPointer, column.member_pointer) || compare_any(memberPointer, column.setter)) {
                        res = true;
                    }
                });
            });
            return res;
        }

        template<class M, class G, class S>
        bool exists_in_composite_primary_key(const virtual_table_t<M>& /*virtualTable*/,
                                             const column_field<G, S>& /*column*/) {
            return false;
        }
    }

#if SQLITE_VERSION_NUMBER >= 3009000
    template<class... Cs, class T = typename std::tuple_element_t<0, std::tuple<Cs...>>::object_type>
    internal::using_fts5_t<T, Cs...> using_fts5(Cs... columns) {
        static_assert(polyfill::conjunction_v<internal::is_table_element_or_constraint<Cs>...>,
                      "Incorrect table elements or constraints");

        SQLITE_ORM_CLANG_SUPPRESS_MISSING_BRACES(return {std::make_tuple(std::forward<Cs>(columns)...)});
    }

    template<class T, class... Cs>
    internal::using_fts5_t<T, Cs...> using_fts5(Cs... columns) {
        static_assert(polyfill::conjunction_v<internal::is_table_element_or_constraint<Cs>...>,
                      "Incorrect table elements or constraints");

        SQLITE_ORM_CLANG_SUPPRESS_MISSING_BRACES(return {std::make_tuple(std::forward<Cs>(columns)...)});
    }
#endif

    /**
     *  Factory function for a table definition.
     *  
     *  The mapped object type is determined implicitly from the first column definition.
     */
    template<class... Cs, class T = typename std::tuple_element_t<0, std::tuple<Cs...>>::object_type>
    internal::table_t<T, false, Cs...> make_table(std::string name, Cs... args) {
        static_assert(polyfill::conjunction_v<internal::is_table_element_or_constraint<Cs>...>,
                      "Incorrect table elements or constraints");

        SQLITE_ORM_CLANG_SUPPRESS_MISSING_BRACES(
            return {std::move(name), std::make_tuple<Cs...>(std::forward<Cs>(args)...)});
    }

    /**
     *  Factory function for a table definition.
     *  
     *  The mapped object type is explicitly specified.
     */
    template<class T, class... Cs>
    internal::table_t<T, false, Cs...> make_table(std::string name, Cs... args) {
        static_assert(polyfill::conjunction_v<internal::is_table_element_or_constraint<Cs>...>,
                      "Incorrect table elements or constraints");

        SQLITE_ORM_CLANG_SUPPRESS_MISSING_BRACES(
            return {std::move(name), std::make_tuple<Cs...>(std::forward<Cs>(args)...)});
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Factory function for a table definition.
     *  
     *  The mapped object type is explicitly specified.
     */
    template<orm_table_reference auto table, class... Cs>
    auto make_table(std::string name, Cs... args) {
        return make_table<internal::auto_decay_table_ref_t<table>>(std::move(name), std::forward<Cs>(args)...);
    }
#endif

    template<class M>
    internal::virtual_table_t<M> make_virtual_table(std::string name, M module_details) {
        SQLITE_ORM_CLANG_SUPPRESS_MISSING_BRACES(return {std::move(name), std::move(module_details)});
    }
}
#pragma once

#include <string>  //  std::string

// #include "functional/cxx_universal.h"
//  ::size_t
// #include "functional/static_magic.h"

// #include "functional/index_sequence_util.h"

// #include "tuple_helper/tuple_traits.h"

// #include "tuple_helper/tuple_filter.h"

// #include "tuple_helper/tuple_iteration.h"

// #include "type_traits.h"

// #include "select_constraints.h"

// #include "cte_types.h"

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
#include <type_traits>
#include <tuple>
#endif

// #include "functional/cxx_core_features.h"

// #include "functional/cxx_type_traits_polyfill.h"

// #include "tuple_helper/tuple_fy.h"

#include <tuple>

namespace sqlite_orm {

    namespace internal {

        template<typename T>
        struct tuplify {
            using type = std::tuple<T>;
        };
        template<typename... Ts>
        struct tuplify<std::tuple<Ts...>> {
            using type = std::tuple<Ts...>;
        };

        template<typename T>
        using tuplify_t = typename tuplify<T>::type;
    }
}

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
namespace sqlite_orm {

    namespace internal {

        /**
         *  Aliased column expression mapped into a CTE, stored as a field in a table column.
         */
        template<class A, class F>
        struct aliased_field {
            ~aliased_field() = delete;
            aliased_field(const aliased_field&) = delete;
            void operator=(const aliased_field&) = delete;

            F field;
        };

        /**
         *  This class captures various properties and aspects of a subselect's column expression,
         *  and is used as a proxy in table_t<>.
         */
        template<typename Moniker,
                 typename ExplicitColRefs,
                 typename Expression,
                 typename SubselectColRefs,
                 typename FinalColRefs,
                 typename... Fs>
        class subselect_mapper {
          public:
            subselect_mapper() = delete;

            // this type name is used to detect the mapping from moniker to object
            using cte_moniker_type = Moniker;
            using fields_type = std::tuple<Fs...>;
            // this type captures the expressions forming the columns in a subselect;
            // it is currently unused, however proves to be useful in compilation errors,
            // as it simplifies recognizing errors in column expressions
            using expressions_tuple = tuplify_t<Expression>;
            // this type captures column reference expressions specified at CTE construction;
            // those are: member pointers, alias holders
            using explicit_colrefs_tuple = ExplicitColRefs;
            // this type captures column reference expressions from the subselect;
            // those are: member pointers, alias holders
            using subselect_colrefs_tuple = SubselectColRefs;
            // this type captures column reference expressions merged from SubselectColRefs and ExplicitColRefs
            using final_colrefs_tuple = FinalColRefs;
        };
    }
}
#endif

// #include "storage_lookup.h"

#include <type_traits>  //  std::true_type, std::false_type, std::remove_const, std::enable_if, std::is_base_of, std::is_void
#include <tuple>
#include <utility>  //  std::index_sequence, std::make_index_sequence

// #include "functional/cxx_universal.h"
//  ::size_t
// #include "functional/cxx_type_traits_polyfill.h"

// #include "type_traits.h"

namespace sqlite_orm {
    namespace internal {

        template<class... DBO>
        struct storage_t;

        template<class... DBO>
        using db_objects_tuple = std::tuple<DBO...>;

        struct basic_table;
        struct index_base;
        struct base_trigger;

        template<class T>
        struct is_storage : std::false_type {};

        template<class... DBO>
        struct is_storage<storage_t<DBO...>> : std::true_type {};
        template<class... DBO>
        struct is_storage<const storage_t<DBO...>> : std::true_type {};

        template<class T>
        struct is_db_objects : std::false_type {};

        template<class... DBO>
        struct is_db_objects<std::tuple<DBO...>> : std::true_type {};
        // note: cannot use `db_objects_tuple` alias template because older compilers have problems
        // to match `const db_objects_tuple`.
        template<class... DBO>
        struct is_db_objects<const std::tuple<DBO...>> : std::true_type {};

        /**
         *  `std::true_type` if given object is mapped, `std::false_type` otherwise.
         * 
         *  Note: unlike table_t<>, index_t<>::object_type and trigger_t<>::object_type is always void.
         */
        template<typename DBO, typename Lookup>
        struct object_type_matches : polyfill::conjunction<polyfill::negation<std::is_void<object_type_t<DBO>>>,
                                                           std::is_same<Lookup, object_type_t<DBO>>> {};

        /**
         *  `std::true_type` if given lookup type (object or moniker) is mapped, `std::false_type` otherwise.
         */
        template<typename DBO, typename Lookup>
        using lookup_type_matches = object_type_matches<DBO, Lookup>;
    }

    // pick/lookup metafunctions
    namespace internal {

        /**
         *   Indirect enabler for DBO, accepting an index to disambiguate non-unique DBOs
         */
        template<class Lookup, size_t Ix, class DBO>
        struct enable_found_table : std::enable_if<lookup_type_matches<DBO, Lookup>::value, DBO> {};

        /**
         *  SFINAE friendly facility to pick a table definition (`table_t`) from a tuple of database objects.
         *  
         *  Lookup - mapped data type
         *  Seq - index sequence matching the number of DBOs
         *  DBOs - db_objects_tuple type
         */
        template<class Lookup, class Seq, class DBOs>
        struct storage_pick_table;

        template<class Lookup, size_t... Ix, class... DBO>
        struct storage_pick_table<Lookup, std::index_sequence<Ix...>, db_objects_tuple<DBO...>>
            : enable_found_table<Lookup, Ix, DBO>... {};

        /**
         *  SFINAE friendly facility to pick a table definition (`table_t`) from a tuple of database objects.
         *
         *  Lookup - 'table' type, mapped data type
         *  DBOs - db_objects_tuple type, possibly const-qualified
         */
        template<class Lookup, class DBOs>
        using storage_pick_table_t = typename storage_pick_table<Lookup,
                                                                 std::make_index_sequence<std::tuple_size<DBOs>::value>,
                                                                 std::remove_const_t<DBOs>>::type;

        /**
         *  Find a table definition (`table_t`) from a tuple of database objects;
         *  `std::nonesuch` if not found.
         *
         *  DBOs - db_objects_tuple type
         *  Lookup - mapped data type
         */
        template<class Lookup, class DBOs>
        struct storage_find_table : polyfill::detected<storage_pick_table_t, Lookup, DBOs> {};

        /**
         *  Find a table definition (`table_t`) from a tuple of database objects;
         *  `std::nonesuch` if not found.
         *
         *  DBOs - db_objects_tuple type, possibly const-qualified
         *  Lookup - mapped data type
         */
        template<class Lookup, class DBOs>
        using storage_find_table_t = typename storage_find_table<Lookup, std::remove_const_t<DBOs>>::type;

#ifndef SQLITE_ORM_BROKEN_VARIADIC_PACK_EXPANSION
        template<class DBOs, class Lookup, class SFINAE = void>
        struct is_mapped : std::false_type {};
        template<class DBOs, class Lookup>
        struct is_mapped<DBOs, Lookup, polyfill::void_t<storage_pick_table_t<Lookup, DBOs>>> : std::true_type {};
#else
        template<class DBOs, class Lookup, class SFINAE = storage_find_table_t<Lookup, DBOs>>
        struct is_mapped : std::true_type {};
        template<class DBOs, class Lookup>
        struct is_mapped<DBOs, Lookup, polyfill::nonesuch> : std::false_type {};
#endif

        template<class DBOs, class Lookup>
        SQLITE_ORM_INLINE_VAR constexpr bool is_mapped_v = is_mapped<DBOs, Lookup>::value;
    }
}

// runtime lookup functions
namespace sqlite_orm {
    namespace internal {
        /**
         *  Pick the table definition for the specified lookup type from the given tuple of schema objects.
         * 
         *  Note: This function requires Lookup to be mapped, otherwise it is removed from the overload resolution set.
         */
        template<class Lookup, class DBOs, satisfies<is_mapped, DBOs, Lookup> = true>
        auto& pick_table(DBOs& dbObjects) {
            using table_type = storage_pick_table_t<Lookup, DBOs>;
            return std::get<table_type>(dbObjects);
        }

        /**
         *  Return passed in DBOs.
         */
        template<class DBOs, class E, satisfies<is_db_objects, DBOs> = true>
        decltype(auto) db_objects_for_expression(DBOs& dbObjects, const E&) {
            return dbObjects;
        }

        template<class Lookup, class DBOs, satisfies<is_db_objects, DBOs> = true>
        decltype(auto) lookup_table_name(const DBOs& dbObjects);
    }
}

// interface functions
namespace sqlite_orm {
    namespace internal {

        template<class DBOs>
        using tables_index_sequence = filter_tuple_sequence_t<DBOs, is_table>;

        template<class DBOs, satisfies<is_db_objects, DBOs> = true>
        int foreign_keys_count(const DBOs& dbObjects) {
            int res = 0;
            iterate_tuple<true>(dbObjects, tables_index_sequence<DBOs>{}, [&res](const auto& table) {
                res += table.template count_of<is_foreign_key>();
            });
            return res;
        }

        template<class Lookup, class DBOs, satisfies<is_db_objects, DBOs>>
        decltype(auto) lookup_table_name(const DBOs& dbObjects) {
            return static_if<is_mapped<DBOs, Lookup>::value>(
                [](const auto& dbObjects) -> const std::string& {
                    return pick_table<Lookup>(dbObjects).name;
                },
                empty_callable<std::string>)(dbObjects);
        }

        /**
         *  Find column name by its type and member pointer.
         */
        template<class O, class F, class DBOs, satisfies<is_db_objects, DBOs> = true>
        const std::string* find_column_name(const DBOs& dbObjects, F O::*field) {
            return pick_table<O>(dbObjects).find_column_name(field);
        }

        /**
         *  Materialize column pointer:
         *  1. by explicit object type and member pointer.
         *  2. by moniker and member pointer.
         */
        template<class O, class F, class DBOs, satisfies<is_db_objects, DBOs> = true>
        constexpr decltype(auto) materialize_column_pointer(const DBOs&, const column_pointer<O, F>& cp) {
            return cp.field;
        }

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
        /**
         *  Materialize column pointer:
         *  3. by moniker and alias_holder<>.
         *  
         *  internal note: there's an overload for `find_column_name()` that avoids going through `table_t<>::find_column_name()`
         */
        template<class Moniker, class ColAlias, class DBOs, satisfies<is_db_objects, DBOs> = true>
        constexpr decltype(auto) materialize_column_pointer(const DBOs&,
                                                            const column_pointer<Moniker, alias_holder<ColAlias>>&) {
            using table_type = storage_pick_table_t<Moniker, DBOs>;
            using cte_mapper_type = cte_mapper_type_t<table_type>;

            // lookup ColAlias in the final column references
            using colalias_index =
                find_tuple_type<typename cte_mapper_type::final_colrefs_tuple, alias_holder<ColAlias>>;
            static_assert(colalias_index::value < std::tuple_size_v<typename cte_mapper_type::final_colrefs_tuple>,
                          "No such column mapped into the CTE.");

            return &aliased_field<
                ColAlias,
                std::tuple_element_t<colalias_index::value, typename cte_mapper_type::fields_type>>::field;
        }
#endif

        /**
         *  Find column name by:
         *  1. by explicit object type and member pointer.
         *  2. by moniker and member pointer.
         */
        template<class O, class F, class DBOs, satisfies<is_db_objects, DBOs> = true>
        const std::string* find_column_name(const DBOs& dbObjects, const column_pointer<O, F>& cp) {
            auto field = materialize_column_pointer(dbObjects, cp);
            return pick_table<O>(dbObjects).find_column_name(field);
        }

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
        /**
         *  Find column name by:
         *  3. by moniker and alias_holder<>.
         */
        template<class Moniker, class ColAlias, class DBOs, satisfies<is_db_objects, DBOs> = true>
        constexpr decltype(auto) find_column_name(const DBOs& dboObjects,
                                                  const column_pointer<Moniker, alias_holder<ColAlias>>&) {
            using table_type = storage_pick_table_t<Moniker, DBOs>;
            using cte_mapper_type = cte_mapper_type_t<table_type>;
            using column_index_sequence = filter_tuple_sequence_t<elements_type_t<table_type>, is_column>;

            // note: even though the columns contain the [`aliased_field<>::*`] we perform the lookup using the column references.
            // lookup ColAlias in the final column references
            using colalias_index =
                find_tuple_type<typename cte_mapper_type::final_colrefs_tuple, alias_holder<ColAlias>>;
            static_assert(colalias_index::value < std::tuple_size_v<typename cte_mapper_type::final_colrefs_tuple>,
                          "No such column mapped into the CTE.");

            // note: we could "materialize" the alias to an `aliased_field<>::*` and use the regular `table_t<>::find_column_name()` mechanism;
            //       however we have the column index already.
            // lookup column in table_t<>'s elements
            constexpr size_t ColIdx = index_sequence_value_at<colalias_index::value>(column_index_sequence{});
            auto& table = pick_table<Moniker>(dboObjects);
            return &std::get<ColIdx>(table.elements).name;
        }
#endif
    }
}
#pragma once

#include <string>  //  std::string

// #include "constraints.h"

// #include "serializer_context.h"

// #include "storage_lookup.h"

namespace sqlite_orm {

    namespace internal {

        template<class T, class C>
        auto serialize(const T& t, const C& context);

        /**
         *  Serialize default value of a column's default valu
         */
        template<class T>
        std::string serialize_default_value(const default_t<T>& dft) {
            db_objects_tuple<> dbObjects;
            serializer_context<db_objects_tuple<>> context{dbObjects};
            return serialize(dft.value, context);
        }

    }

}
#pragma once

#include "sqlite3.h"
#include <memory>  //  std::unique_ptr/shared_ptr, std::make_unique/std::make_shared
#include <system_error>  //  std::system_error
#include <string>  //  std::string
#include <type_traits>  //  std::remove_reference, std::is_base_of, std::decay, std::false_type, std::true_type
#include <functional>  //   std::identity
#include <sstream>  //  std::stringstream
#include <map>  //  std::map
#include <vector>  //  std::vector
#include <tuple>  //  std::tuple_size, std::tuple, std::make_tuple, std::tie
#include <utility>  //  std::forward, std::pair
#include <algorithm>  //  std::for_each, std::ranges::for_each
// #include "functional/cxx_optional.h"

// #include "functional/cxx_universal.h"

// #include "functional/cxx_functional_polyfill.h"

// #include "functional/static_magic.h"

// #include "functional/mpl.h"

// #include "tuple_helper/tuple_traits.h"

// #include "tuple_helper/tuple_filter.h"

// #include "tuple_helper/tuple_transformer.h"

// #include "tuple_helper/tuple_iteration.h"

// #include "type_traits.h"

// #include "alias.h"

// #include "error_code.h"

// #include "type_printer.h"

// #include "constraints.h"

// #include "field_printer.h"

#include <string>  //  std::string
#include <sstream>  //  std::stringstream
#include <vector>  //  std::vector
#include <memory>  //  std::shared_ptr, std::unique_ptr
#ifndef SQLITE_ORM_OMITS_CODECVT
#include <locale>  // std::wstring_convert
#include <codecvt>  //  std::codecvt_utf8_utf16
#endif
// #include "functional/cxx_optional.h"

// #include "functional/cxx_universal.h"

// #include "functional/cxx_type_traits_polyfill.h"

// #include "is_std_ptr.h"

// #include "type_traits.h"

namespace sqlite_orm {

    /**
     *  Is used to print members mapped to objects in storage_t::dump member function.
     *  Other developers can create own specialization to map custom types
     */
    template<class T, typename SFINAE = void>
    struct field_printer;

    namespace internal {
        /*
         *  Implementation note: the technique of indirect expression testing is because
         *  of older compilers having problems with the detection of dependent templates [SQLITE_ORM_BROKEN_ALIAS_TEMPLATE_DEPENDENT_EXPR_SFINAE].
         *  It must also be a type that differs from those for `is_preparable_v`, `is_bindable_v`.
         */
        template<class Printer>
        struct indirectly_test_printable;

        template<class T, class SFINAE = void>
        SQLITE_ORM_INLINE_VAR constexpr bool is_printable_v = false;
        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool
            is_printable_v<T, polyfill::void_t<indirectly_test_printable<decltype(field_printer<T>{})>>> = true;

        template<class T>
        struct is_printable : polyfill::bool_constant<is_printable_v<T>> {};
    }

    template<class T>
    struct field_printer<T, internal::match_if<std::is_arithmetic, T>> {
        std::string operator()(const T& t) const {
            std::stringstream ss;
            ss << t;
            return ss.str();
        }
    };

    /**
     *  Upgrade to integer is required when using unsigned char(uint8_t)
     */
    template<>
    struct field_printer<unsigned char, void> {
        std::string operator()(const unsigned char& t) const {
            std::stringstream ss;
            ss << +t;
            return ss.str();
        }
    };

    /**
     *  Upgrade to integer is required when using signed char(int8_t)
     */
    template<>
    struct field_printer<signed char, void> {
        std::string operator()(const signed char& t) const {
            std::stringstream ss;
            ss << +t;
            return ss.str();
        }
    };

    /**
     *  char is neither signed char nor unsigned char so it has its own specialization
     */
    template<>
    struct field_printer<char, void> {
        std::string operator()(const char& t) const {
            std::stringstream ss;
            ss << +t;
            return ss.str();
        }
    };

    template<class T>
    struct field_printer<T, internal::match_if<std::is_base_of, std::string, T>> {
        std::string operator()(std::string string) const {
            return string;
        }
    };

    template<>
    struct field_printer<std::vector<char>, void> {
        std::string operator()(const std::vector<char>& t) const {
            std::stringstream ss;
            ss << std::hex;
            for(auto c: t) {
                ss << c;
            }
            return ss.str();
        }
    };
#ifndef SQLITE_ORM_OMITS_CODECVT
    /**
     *  Specialization for std::wstring (UTF-16 assumed).
     */
    template<class T>
    struct field_printer<T, internal::match_if<std::is_base_of, std::wstring, T>> {
        std::string operator()(const std::wstring& wideString) const {
            std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
            return converter.to_bytes(wideString);
        }
    };
#endif  //  SQLITE_ORM_OMITS_CODECVT
    template<>
    struct field_printer<nullptr_t, void> {
        std::string operator()(const nullptr_t&) const {
            return "NULL";
        }
    };
#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
    template<>
    struct field_printer<std::nullopt_t, void> {
        std::string operator()(const std::nullopt_t&) const {
            return "NULL";
        }
    };
#endif  //  SQLITE_ORM_OPTIONAL_SUPPORTED
    template<class T>
    struct field_printer<T,
                         std::enable_if_t<polyfill::conjunction<
                             is_std_ptr<T>,
                             internal::is_printable<std::remove_cv_t<typename T::element_type>>>::value>> {
        using unqualified_type = std::remove_cv_t<typename T::element_type>;

        std::string operator()(const T& t) const {
            if(t) {
                return field_printer<unqualified_type>()(*t);
            } else {
                return field_printer<nullptr_t>{}(nullptr);
            }
        }
    };

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
    template<class T>
    struct field_printer<
        T,
        std::enable_if_t<polyfill::conjunction_v<polyfill::is_specialization_of<T, std::optional>,
                                                 internal::is_printable<std::remove_cv_t<typename T::value_type>>>>> {
        using unqualified_type = std::remove_cv_t<typename T::value_type>;

        std::string operator()(const T& t) const {
            if(t.has_value()) {
                return field_printer<unqualified_type>()(*t);
            } else {
                return field_printer<std::nullopt_t>{}(std::nullopt);
            }
        }
    };
#endif  // SQLITE_ORM_OPTIONAL_SUPPORTED
}

// #include "rowid.h"

// #include "operators.h"

// #include "select_constraints.h"

// #include "core_functions.h"

// #include "conditions.h"

// #include "statement_binder.h"

// #include "column_result.h"

#include <type_traits>  //  std::enable_if, std::is_same, std::decay, std::is_arithmetic, std::is_base_of
#include <functional>  //  std::reference_wrapper

// #include "functional/cxx_universal.h"
//  ::nullptr_t
// #include "functional/cxx_type_traits_polyfill.h"

// #include "functional/mpl.h"

// #include "tuple_helper/tuple_traits.h"

// #include "tuple_helper/tuple_fy.h"

// #include "tuple_helper/tuple_filter.h"

// #include "tuple_helper/tuple_transformer.h"

// #include "tuple_helper/same_or_void.h"

// #include "type_traits.h"

// #include "member_traits/member_traits.h"

// #include "mapped_type_proxy.h"

#include <type_traits>  //  std::remove_const

// #include "type_traits.h"

// #include "table_reference.h"

// #include "alias_traits.h"

namespace sqlite_orm {

    namespace internal {

        /**
         *  If T is a table reference or recordset alias then the typename mapped_type_proxy<T>::type is the unqualified aliased type,
         *  otherwise unqualified T.
         */
        template<class T, class SFINAE = void>
        struct mapped_type_proxy : std::remove_const<T> {};

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        template<orm_table_reference R>
        struct mapped_type_proxy<R, void> : R {};
#endif

        template<class A>
        struct mapped_type_proxy<A, match_if<is_recordset_alias, A>> : std::remove_const<type_t<A>> {};

        template<class T>
        using mapped_type_proxy_t = typename mapped_type_proxy<T>::type;
    }
}

// #include "core_functions.h"

// #include "select_constraints.h"

// #include "operators.h"

// #include "rowid.h"

// #include "column_result_proxy.h"

// #include "alias.h"

// #include "cte_types.h"

// #include "storage_traits.h"

#include <tuple>  //  std::tuple

// #include "functional/cxx_type_traits_polyfill.h"

// #include "tuple_helper/tuple_filter.h"

// #include "tuple_helper/tuple_transformer.h"

// #include "type_traits.h"

// #include "storage_lookup.h"

// #include "schema/column.h"

namespace sqlite_orm {
    namespace internal {

        namespace storage_traits {

            /**
             *  DBO - db object (table)
             */
            template<class DBO>
            struct storage_mapped_columns_impl
                : tuple_transformer<filter_tuple_t<elements_type_t<DBO>, is_column>, field_type_t> {};

            template<>
            struct storage_mapped_columns_impl<polyfill::nonesuch> {
                using type = std::tuple<>;
            };

            /**
             *  DBOs - db_objects_tuple type
             *  Lookup - mapped or unmapped data type
             */
            template<class DBOs, class Lookup>
            struct storage_mapped_columns : storage_mapped_columns_impl<storage_find_table_t<Lookup, DBOs>> {};

            /**
             *  DBO - db object (table)
             */
            template<class DBO>
            struct storage_mapped_column_expressions_impl
                : tuple_transformer<filter_tuple_t<elements_type_t<DBO>, is_column>, column_field_expression_t> {};

            template<>
            struct storage_mapped_column_expressions_impl<polyfill::nonesuch> {
                using type = std::tuple<>;
            };

            /**
             *  DBOs - db_objects_tuple type
             *  Lookup - mapped or unmapped data type
             */
            template<class DBOs, class Lookup>
            struct storage_mapped_column_expressions
                : storage_mapped_column_expressions_impl<storage_find_table_t<Lookup, DBOs>> {};
        }
    }
}

// #include "function.h"

#include <type_traits>  //  std::enable_if, std::is_member_function_pointer, std::is_function, std::remove_const, std::decay, std::is_convertible, std::is_same, std::false_type, std::true_type
#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
#include <concepts>  //  std::copy_constructible
#endif
#include <tuple>  //  std::tuple, std::tuple_size, std::tuple_element
#include <algorithm>  //  std::min, std::copy_n
#include <utility>  //  std::move, std::forward

// #include "functional/cxx_universal.h"
//  ::size_t, ::nullptr_t
// #include "functional/cxx_type_traits_polyfill.h"

// #include "functional/cstring_literal.h"

// #include "functional/function_traits.h"

// #include "cxx_type_traits_polyfill.h"

// #include "mpl.h"

namespace sqlite_orm {
    namespace internal {
        /*
         *  Define nested typenames:
         *  - return_type
         *  - arguments_tuple
         *  - signature_type
         */
        template<class F>
        struct function_traits;

        /*
         *  A function's return type
         */
        template<class F>
        using function_return_type_t = typename function_traits<F>::return_type;

        /*
         *  A function's arguments tuple
         */
        template<class F,
                 template<class...>
                 class Tuple,
                 template<class...> class ProjectOp = polyfill::type_identity_t>
        using function_arguments = typename function_traits<F>::template arguments_tuple<Tuple, ProjectOp>;

        /*
         *  A function's signature
         */
        template<class F>
        using function_signature_type_t = typename function_traits<F>::signature_type;

        template<class R, class... Args>
        struct function_traits<R(Args...)> {
            using return_type = R;

            template<template<class...> class Tuple, template<class...> class ProjectOp>
            using arguments_tuple = Tuple<mpl::invoke_fn_t<ProjectOp, Args>...>;

            using signature_type = R(Args...);
        };

        // non-exhaustive partial specializations of `function_traits`

        template<class R, class... Args>
        struct function_traits<R(Args...) const> : function_traits<R(Args...)> {
            using signature_type = R(Args...) const;
        };

#ifdef SQLITE_ORM_NOTHROW_ALIASES_SUPPORTED
        template<class R, class... Args>
        struct function_traits<R(Args...) noexcept> : function_traits<R(Args...)> {
            using signature_type = R(Args...) noexcept;
        };

        template<class R, class... Args>
        struct function_traits<R(Args...) const noexcept> : function_traits<R(Args...)> {
            using signature_type = R(Args...) const noexcept;
        };
#endif

        /*
         *  Pick signature of function pointer
         */
        template<class F>
        struct function_traits<F(*)> : function_traits<F> {};

        /*
         *  Pick signature of function reference
         */
        template<class F>
        struct function_traits<F(&)> : function_traits<F> {};

        /*
         *  Pick signature of pointer-to-member function
         */
        template<class F, class O>
        struct function_traits<F O::*> : function_traits<F> {};
    }
}

// #include "type_traits.h"

// #include "tags.h"

namespace sqlite_orm {

    struct arg_values;

    // note (internal): forward declare even if `SQLITE_VERSION_NUMBER < 3020000` in order to simplify coding below
    template<class P, class T>
    struct pointer_arg;
    // note (internal): forward declare even if `SQLITE_VERSION_NUMBER < 3020000` in order to simplify coding below
    template<class P, class T, class D>
    class pointer_binding;

    namespace internal {
        template<class F>
        using scalar_call_function_t = decltype(&F::operator());

        template<class F>
        using aggregate_step_function_t = decltype(&F::step);

        template<class F>
        using aggregate_fin_function_t = decltype(&F::fin);

        template<class F, class SFINAE = void>
        SQLITE_ORM_INLINE_VAR constexpr bool is_scalar_udf_v = false;
        template<class F>
        SQLITE_ORM_INLINE_VAR constexpr bool is_scalar_udf_v<F, polyfill::void_t<scalar_call_function_t<F>>> = true;

        template<class F>
        struct is_scalar_udf : polyfill::bool_constant<is_scalar_udf_v<F>> {};

        template<class F, class SFINAE = void>
        SQLITE_ORM_INLINE_VAR constexpr bool is_aggregate_udf_v = false;
        template<class F>
        SQLITE_ORM_INLINE_VAR constexpr bool is_aggregate_udf_v<
            F,
            polyfill::void_t<aggregate_step_function_t<F>,
                             aggregate_fin_function_t<F>,
                             std::enable_if_t<std::is_member_function_pointer<aggregate_step_function_t<F>>::value>,
                             std::enable_if_t<std::is_member_function_pointer<aggregate_fin_function_t<F>>::value>>> =
            true;

        template<class F>
        struct is_aggregate_udf : polyfill::bool_constant<is_aggregate_udf_v<F>> {};

        template<class UDF>
        struct function;
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /** @short Specifies that a type is a function signature (i.e. a function in the C++ type system).
     */
    template<class Sig>
    concept orm_function_sig = std::is_function_v<Sig>;

    /** @short Specifies that a type is a classic function object.
     *  
     *  A classic function object meets the following requirements:
     *  - defines a single call operator `F::operator()`
     *  - isn't a traditional sqlite_orm scalar function (having a static `F::name()` function
     */
    template<class F>
    concept orm_classic_function_object =
        ((!requires { typename F::is_transparent; }) && (requires { &F::operator(); }) &&
         /*rule out sqlite_orm scalar function*/
         (!requires { F::name(); }));

    /** @short Specifies that a type is a user-defined scalar function.
     *  
     *  `UDF` must meet the following requirements:
     *  - `UDF::name()` static function
     *  - `UDF::operator()()` call operator
     */
    template<class UDF>
    concept orm_scalar_udf = requires {
        UDF::name();
        typename internal::scalar_call_function_t<UDF>;
    };

    /** @short Specifies that a type is a user-defined aggregate function.
     *  
     *  `UDF` must meet the following requirements:
     *  - `UDF::name()` static function
     *  - `UDF::step()` member function
     *  - `UDF::fin()` member function
     */
    template<class UDF>
    concept orm_aggregate_udf = requires {
        UDF::name();
        typename internal::aggregate_step_function_t<UDF>;
        typename internal::aggregate_fin_function_t<UDF>;
        requires std::is_member_function_pointer_v<internal::aggregate_step_function_t<UDF>>;
        requires std::is_member_function_pointer_v<internal::aggregate_fin_function_t<UDF>>;
    };

    /** @short Specifies that a type is a framed user-defined scalar function.
     */
    template<class F>
    concept orm_scalar_function = (polyfill::is_specialization_of_v<std::remove_const_t<F>, internal::function> &&
                                   orm_scalar_udf<typename F::udf_type>);

    /** @short Specifies that a type is a framed user-defined aggregate function.
     */
    template<class F>
    concept orm_aggregate_function = (polyfill::is_specialization_of_v<std::remove_const_t<F>, internal::function> &&
                                      orm_aggregate_udf<typename F::udf_type>);

    /** @short Specifies that a type is a framed and quoted user-defined scalar function.
     */
    template<class Q>
    concept orm_quoted_scalar_function = requires(const Q& quotedF) {
        quotedF.name();
        quotedF.callable();
    };
#endif

    namespace internal {
        template<class F, class SFINAE = void>
        struct callable_arguments_impl;

        template<class F>
        struct callable_arguments_impl<F, match_if<is_scalar_udf, F>> {
            using args_tuple = function_arguments<scalar_call_function_t<F>, std::tuple, std::decay_t>;
            using return_type = function_return_type_t<scalar_call_function_t<F>>;
        };

        template<class F>
        struct callable_arguments_impl<F, match_if<is_aggregate_udf, F>> {
            using args_tuple = function_arguments<aggregate_step_function_t<F>, std::tuple, std::decay_t>;
            using return_type = function_return_type_t<aggregate_fin_function_t<F>>;
        };

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        template<class F>
            requires(std::is_function_v<F>)
        struct callable_arguments_impl<F, void> {
            using args_tuple = function_arguments<F, std::tuple, std::decay_t>;
            using return_type = std::decay_t<function_return_type_t<F>>;
        };
#endif

        template<class F>
        struct callable_arguments : callable_arguments_impl<F> {};

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        /*
         *  Bundle of type and name of a quoted user-defined function.
         */
        template<class UDF>
        struct udf_holder : private std::string {
            using udf_type = UDF;

            using std::string::basic_string;

            const std::string& operator()() const {
                return *this;
            }
        };
#endif

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        /*
         *  Bundle of type and name of a traditional sqlite_orm user-defined function.
         */
        template<class UDF>
            requires(requires { UDF::name(); })
        struct udf_holder<UDF>
#else
        /*
         *  Bundle of type and name of a traditional sqlite_orm user-defined function.
         */
        template<class UDF>
        struct udf_holder
#endif
        {
            using udf_type = UDF;

            template<class R = decltype(UDF::name()),
                     std::enable_if_t<polyfill::negation<std::is_same<R, char>>::value, bool> = true>
            decltype(auto) operator()() const {
                return UDF::name();
            }

            template<class R = decltype(UDF::name()), std::enable_if_t<std::is_same<R, char>::value, bool> = true>
            std::string operator()() const {
                return std::string{UDF::name()};
            }
        };

        /*
         *  Represents a call of a user-defined function.
         */
        template<class UDF, class... CallArgs>
        struct function_call {
            using udf_type = UDF;
            using args_tuple = std::tuple<CallArgs...>;

            udf_holder<udf_type> name;
            args_tuple callArgs;
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool
            is_operator_argument_v<T, std::enable_if_t<polyfill::is_specialization_of<T, function_call>::value>> = true;

        template<class T>
        struct unpacked_arg {
            using type = T;
        };
        template<class F, class... CallArgs>
        struct unpacked_arg<function_call<F, CallArgs...>> {
            using type = typename callable_arguments<F>::return_type;
        };
        template<class T>
        using unpacked_arg_t = typename unpacked_arg<T>::type;

        template<size_t I, class FnParam, class CallArg>
        SQLITE_ORM_CONSTEVAL bool expected_pointer_value() {
            static_assert(polyfill::always_false_v<FnParam, CallArg>, "Expected a pointer value for I-th argument");
            return false;
        }

        template<size_t I, class FnParam, class CallArg, class EnableIfTag = void>
        constexpr bool is_same_pvt_v = expected_pointer_value<I, FnParam, CallArg>();

        // Always allow binding nullptr to a pointer argument
        template<size_t I, class PointerArg>
        constexpr bool is_same_pvt_v<I, PointerArg, nullptr_t, polyfill::void_t<typename PointerArg::tag>> = true;
        // Always allow binding nullptr to a pointer argument
        template<size_t I, class P, class T, class D>
        constexpr bool is_same_pvt_v<I, pointer_arg<P, T>, pointer_binding<nullptr_t, T, D>, void> = true;

        template<size_t I, class PointerArgDataType, class BindingDataType>
        SQLITE_ORM_CONSTEVAL bool assert_same_pointer_data_type() {
            constexpr bool valid = std::is_convertible<BindingDataType*, PointerArgDataType*>::value;
            static_assert(valid, "Pointer data types of I-th argument do not match");
            return valid;
        }

#if __cplusplus >= 201703L  // C++17 or later
        template<size_t I, const char* PointerArg, const char* Binding>
        SQLITE_ORM_CONSTEVAL bool assert_same_pointer_tag() {
            constexpr bool valid = Binding == PointerArg;
            static_assert(valid, "Pointer types (tags) of I-th argument do not match");
            return valid;
        }
        template<size_t I, class PointerArg, class Binding>
        constexpr bool
            is_same_pvt_v<I, PointerArg, Binding, polyfill::void_t<typename PointerArg::tag, typename Binding::tag>> =
                assert_same_pointer_tag<I, PointerArg::tag::value, Binding::tag::value>() &&
                assert_same_pointer_data_type<I,
                                              typename PointerArg::qualified_type,
                                              typename Binding::qualified_type>();
#else
        template<size_t I, class PointerArg, class Binding>
        constexpr bool assert_same_pointer_tag() {
            constexpr bool valid = Binding::value == PointerArg::value;
            static_assert(valid, "Pointer types (tags) of I-th argument do not match");
            return valid;
        }

        template<size_t I, class PointerArg, class Binding>
        constexpr bool
            is_same_pvt_v<I, PointerArg, Binding, polyfill::void_t<typename PointerArg::tag, typename Binding::tag>> =
                assert_same_pointer_tag<I, typename PointerArg::tag, typename Binding::tag>();
#endif

        // not a pointer value, currently leave it unchecked
        template<size_t I, class FnParam, class CallArg>
        SQLITE_ORM_CONSTEVAL bool validate_pointer_value_type(std::false_type) {
            return true;
        }

        // check the type of pointer values
        template<size_t I, class FnParam, class CallArg>
        SQLITE_ORM_CONSTEVAL bool validate_pointer_value_type(std::true_type) {
            return is_same_pvt_v<I, FnParam, CallArg>;
        }

        template<class FnParams, class CallArgs>
        SQLITE_ORM_CONSTEVAL bool validate_pointer_value_types(polyfill::index_constant<size_t(-1)>) {
            return true;
        }
        template<class FnParams, class CallArgs, size_t I>
        SQLITE_ORM_CONSTEVAL bool validate_pointer_value_types(polyfill::index_constant<I>) {
            using func_param_type = std::tuple_element_t<I, FnParams>;
            using call_arg_type = unpacked_arg_t<std::tuple_element_t<I, CallArgs>>;

#ifdef SQLITE_ORM_RELAXED_CONSTEXPR_SUPPORTED
            constexpr bool valid = validate_pointer_value_type<I,
                                                               std::tuple_element_t<I, FnParams>,
                                                               unpacked_arg_t<std::tuple_element_t<I, CallArgs>>>(
                polyfill::bool_constant < (polyfill::is_specialization_of_v<func_param_type, pointer_arg>) ||
                (polyfill::is_specialization_of_v<call_arg_type, pointer_binding>) > {});

            return validate_pointer_value_types<FnParams, CallArgs>(polyfill::index_constant<I - 1>{}) && valid;
#else
            return validate_pointer_value_types<FnParams, CallArgs>(polyfill::index_constant<I - 1>{}) &&
                   validate_pointer_value_type<I,
                                               std::tuple_element_t<I, FnParams>,
                                               unpacked_arg_t<std::tuple_element_t<I, CallArgs>>>(
                       polyfill::bool_constant < (polyfill::is_specialization_of_v<func_param_type, pointer_arg>) ||
                       (polyfill::is_specialization_of_v<call_arg_type, pointer_binding>) > {});
#endif
        }

        /*  
         *  Note: Currently the number of call arguments is checked and whether the types of pointer values match,
         *  but other call argument types are not checked against the parameter types of the function.
         */
        template<typename UDF, typename... CallArgs>
#ifdef SQLITE_ORM_RELAXED_CONSTEXPR_SUPPORTED
        SQLITE_ORM_CONSTEVAL void check_function_call() {
#else
        void check_function_call() {
#endif
            using call_args_tuple = std::tuple<CallArgs...>;
            using function_params_tuple = typename callable_arguments<UDF>::args_tuple;
            constexpr size_t callArgsCount = std::tuple_size<call_args_tuple>::value;
            constexpr size_t functionParamsCount = std::tuple_size<function_params_tuple>::value;
            static_assert(std::is_same<function_params_tuple, std::tuple<arg_values>>::value ||
                              (callArgsCount == functionParamsCount &&
                               validate_pointer_value_types<function_params_tuple, call_args_tuple>(
                                   polyfill::index_constant<std::min(functionParamsCount, callArgsCount) - 1>{})),
                          "Check the number and types of the function call arguments");
        }

        /*
         *  Generator of a user-defined function call in a sql query expression.
         *  
         *  Use the variable template `func<>` to instantiate.
         *  
         *  Calling the function captures the parameters in a `function_call` node.
         */
        template<class UDF>
        struct function {
            using udf_type = UDF;
            using callable_type = UDF;

            /*
             *  Generates the SQL function call.
             */
            template<typename... CallArgs>
            function_call<UDF, CallArgs...> operator()(CallArgs... callArgs) const {
                check_function_call<UDF, CallArgs...>();
                return {this->udf_holder(), {std::forward<CallArgs>(callArgs)...}};
            }

            constexpr auto udf_holder() const {
                return internal::udf_holder<UDF>{};
            }

            // returns a character range
            constexpr auto name() const {
                return this->udf_holder()();
            }
        };

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        /*
         *  Generator of a user-defined function call in a sql query expression.
         *  
         *  Use the string literal operator template `""_scalar.quote()` to quote
         *  a freestanding function, stateless lambda or function object.
         *  
         *  Calling the function captures the parameters in a `function_call` node.
         *  
         *  Internal note:
         *  1. Captures and represents a function [pointer or object], especially one without side effects.
         *  If `F` is a stateless function object, `quoted_scalar_function::callable()` returns the original function object,
         *  otherwise it is assumed to have possibe side-effects and `quoted_scalar_function::callable()` returns a copy.
         *  2. The nested `udf_type` typename is deliberately chosen to be the function signature,
         *  and will be the abstracted version of the user-defined function. 
         */
        template<class F, class Sig, size_t N>
        struct quoted_scalar_function {
            using udf_type = Sig;
            using callable_type = F;

            /*
             *  Generates the SQL function call.
             */
            template<typename... CallArgs>
            function_call<udf_type, CallArgs...> operator()(CallArgs... callArgs) const {
                check_function_call<udf_type, CallArgs...>();
                return {this->udf_holder(), {std::forward<CallArgs>(callArgs)...}};
            }

            /*
             *  Return original `udf` if stateless or a copy of it otherwise
             */
            constexpr decltype(auto) callable() const {
                if constexpr(stateless<F>) {
                    return (this->udf);
                } else {
                    // non-const copy
                    return F(this->udf);
                }
            }

            constexpr auto udf_holder() const {
                return internal::udf_holder<udf_type>{this->name()};
            }

            constexpr auto name() const {
                return this->nme;
            }

            template<class... Args>
            consteval quoted_scalar_function(const char (&name)[N], Args&&... constructorArgs) :
                udf(std::forward<Args>(constructorArgs)...) {
                std::copy_n(name, N, this->nme);
            }

            F udf;
            char nme[N];
        };

        template<size_t N>
        struct quoted_function_builder : cstring_literal<N> {
            using cstring_literal<N>::cstring_literal;

            /*
             *  From a freestanding function, possibly overloaded.
             */
            template<orm_function_sig F>
            [[nodiscard]] consteval auto quote(F* callable) const {
                return quoted_scalar_function<F*, F, N>{this->cstr, std::move(callable)};
            }

            /*
             *  From a classic function object instance.
             */
            template<class F>
                requires(orm_classic_function_object<F> && (stateless<F> || std::copy_constructible<F>))
            [[nodiscard]] consteval auto quote(F callable) const {
                using Sig = function_signature_type_t<decltype(&F::operator())>;
                // detect whether overloaded call operator can be picked using `Sig`
                using call_operator_type = decltype(static_cast<Sig F::*>(&F::operator()));
                return quoted_scalar_function<F, Sig, N>{this->cstr, std::move(callable)};
            }

            /*
             *  From a function object instance, picking the overloaded call operator.
             */
            template<orm_function_sig Sig, class F>
                requires((stateless<F> || std::copy_constructible<F>))
            [[nodiscard]] consteval auto quote(F callable) const {
                // detect whether overloaded call operator can be picked using `Sig`
                using call_operator_type = decltype(static_cast<Sig F::*>(&F::operator()));
                return quoted_scalar_function<F, Sig, N>{this->cstr, std::move(callable)};
            }

            /*
             *  From a classic function object type.
             */
            template<orm_classic_function_object F, class... Args>
                requires(stateless<F> || std::copy_constructible<F>)
            [[nodiscard]] consteval auto quote(Args&&... constructorArgs) const {
                using Sig = function_signature_type_t<decltype(&F::operator())>;
                return quoted_scalar_function<F, Sig, N>{this->cstr, std::forward<Args>(constructorArgs)...};
            }

            /*
             *  From a function object type, picking the overloaded call operator.
             */
            template<orm_function_sig Sig, class F, class... Args>
                requires((stateless<F> || std::copy_constructible<F>))
            [[nodiscard]] consteval auto quote(Args&&... constructorArgs) const {
                // detect whether overloaded call operator can be picked using `Sig`
                using call_operator_type = decltype(static_cast<Sig F::*>(&F::operator()));
                return quoted_scalar_function<F, Sig, N>{this->cstr, std::forward<Args>(constructorArgs)...};
            }
        };
#endif
    }

    /** @short Call a user-defined function.
     *  
     *  Note: Currently the number of call arguments is checked and whether the types of pointer values match,
     *  but other call argument types are not checked against the parameter types of the function.
     * 
     *  Example:
     *  struct IdFunc { int oeprator(int arg)() const { return arg; } };
     *  // inline:
     *  select(func<IdFunc>(42));
     *  // As this is a variable template, you can frame the user-defined function and define a variable for syntactic sugar and legibility:
     *  inline constexpr orm_scalar_function auto idfunc = func<IdFunc>;
     *  select(idfunc(42));
     *  
     */
    template<class UDF>
#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        requires(orm_scalar_udf<UDF> || orm_aggregate_udf<UDF>)
#endif
    SQLITE_ORM_INLINE_VAR constexpr internal::function<UDF> func{};

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    inline namespace literals {
        /*  @short Create a scalar function from a freestanding function, stateless lambda or function object,
         *  and call such a user-defined function.
         *  
         *  If you need to pick a function or method from an overload set, or pick a template function you can
         *  specify an explicit function signature in the call to `from()`.
         *  
         *  Examples:
         *  // freestanding function from a library
         *  constexpr orm_quoted_scalar_function auto clamp_int_f = "clamp_int"_scalar.quote(std::clamp<int>);
         *  // stateless lambda
         *  constexpr orm_quoted_scalar_function auto is_fatal_error_f = "IS_FATAL_ERROR"_scalar.quote([](unsigned long errcode) {
         *      return errcode != 0;
         *  });
         *  // function object instance
         *  constexpr orm_quoted_scalar_function auto equal_to_int_f = "equal_to"_scalar.quote(std::equal_to<int>{});
         *  // function object
         *  constexpr orm_quoted_scalar_function auto equal_to_int_2_f = "equal_to"_scalar.quote<std::equal_to<int>>();
         *  // pick function object's template call operator
         *  constexpr orm_quoted_scalar_function auto equal_to_int_3_f = "equal_to"_scalar.quote<bool(const int&, const int&) const>(std::equal_to<void>{});
         *
         *  storage.create_scalar_function<clamp_int_f>();
         *  storage.create_scalar_function<is_fatal_error_f>();
         *  storage.create_scalar_function<equal_to_int_f>();
         *  storage.create_scalar_function<equal_to_int_2_f>();
         *  storage.create_scalar_function<equal_to_int_3_f>();
         *
         *  auto rows = storage.select(clamp_int_f(0, 1, 1));
         *  auto rows = storage.select(is_fatal_error_f(1));
         *  auto rows = storage.select(equal_to_int_f(1, 1));
         *  auto rows = storage.select(equal_to_int_2_f(1, 1));
         *  auto rows = storage.select(equal_to_int_3_f(1, 1));
         */
        template<internal::quoted_function_builder builder>
        [[nodiscard]] consteval auto operator"" _scalar() {
            return builder;
        }
    }
#endif
}

// #include "ast/special_keywords.h"

namespace sqlite_orm {
    namespace internal {
        struct current_time_t {};
        struct current_date_t {};
        struct current_timestamp_t {};
    }

    inline internal::current_time_t current_time() {
        return {};
    }

    inline internal::current_date_t current_date() {
        return {};
    }

    inline internal::current_timestamp_t current_timestamp() {
        return {};
    }
}

namespace sqlite_orm {

    namespace internal {

        /**
         *  Obtains the result type of expressions that form the columns of a select statement.
         *  
         *  This is a proxy class used to define what type must have result type depending on select
         *  arguments (member pointer, aggregate functions, etc). Below you can see specializations
         *  for different types. E.g. specialization for internal::length_t has `type` int cause
         *  LENGTH returns INTEGER in sqlite. Every column_result_t must have `type` type that equals
         *  c++ SELECT return type for T
         *  DBOs - db_objects_tuple type
         *  T - C++ type
         *  SFINAE - sfinae argument
         */
        template<class DBOs, class T, class SFINAE = void>
        struct column_result_t {
#ifdef __FUNCTION__
            // produce an error message that reveals `T` and `DBOs`
            static constexpr bool reveal() {
                static_assert(polyfill::always_false_v<T>, "T not found in DBOs - " __FUNCTION__);
            }
            static constexpr bool trigger = reveal();
#endif
        };

        template<class DBOs, class T>
        using column_result_of_t = typename column_result_t<DBOs, T>::type;

        template<class DBOs, class Tpl>
        using column_result_for_tuple_t =
            transform_tuple_t<Tpl, mpl::bind_front_fn<column_result_of_t, DBOs>::template fn>;

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
        template<class DBOs, class T>
        struct column_result_t<DBOs, as_optional_t<T>, void> {
            using type = std::optional<column_result_of_t<DBOs, T>>;
        };

        template<class DBOs, class T>
        struct column_result_t<DBOs, std::optional<T>, void> {
            using type = std::optional<T>;
        };
#endif  //  SQLITE_ORM_OPTIONAL_SUPPORTED

        template<class DBOs, class L, class A>
        struct column_result_t<DBOs, dynamic_in_t<L, A>, void> {
            using type = bool;
        };

        template<class DBOs, class L, class... Args>
        struct column_result_t<DBOs, in_t<L, Args...>, void> {
            using type = bool;
        };

        template<class DBOs>
        struct column_result_t<DBOs, current_time_t, void> {
            using type = std::string;
        };

        template<class DBOs>
        struct column_result_t<DBOs, current_date_t, void> {
            using type = std::string;
        };

        template<class DBOs>
        struct column_result_t<DBOs, current_timestamp_t, void> {
            using type = std::string;
        };

        template<class DBOs, class T>
        struct column_result_t<DBOs, T, match_if<std::is_member_pointer, T>> : member_field_type<T> {};

        template<class DBOs, class R, class S, class... Args>
        struct column_result_t<DBOs, built_in_function_t<R, S, Args...>, void> {
            using type = R;
        };

        template<class DBOs, class R, class S, class... Args>
        struct column_result_t<DBOs, built_in_aggregate_function_t<R, S, Args...>, void> {
            using type = R;
        };

        template<class DBOs, class F, class... Args>
        struct column_result_t<DBOs, function_call<F, Args...>, void> {
            using type = typename callable_arguments<F>::return_type;
        };

        template<class DBOs, class X, class... Rest, class S>
        struct column_result_t<DBOs, built_in_function_t<unique_ptr_result_of<X>, S, X, Rest...>, void> {
            using type = std::unique_ptr<column_result_of_t<DBOs, X>>;
        };

        template<class DBOs, class X, class S>
        struct column_result_t<DBOs, built_in_aggregate_function_t<unique_ptr_result_of<X>, S, X>, void> {
            using type = std::unique_ptr<column_result_of_t<DBOs, X>>;
        };

        template<class DBOs, class T>
        struct column_result_t<DBOs, count_asterisk_t<T>, void> {
            using type = int;
        };

        template<class DBOs>
        struct column_result_t<DBOs, nullptr_t, void> {
            using type = nullptr_t;
        };

        template<class DBOs>
        struct column_result_t<DBOs, count_asterisk_without_type, void> {
            using type = int;
        };

        template<class DBOs, class T>
        struct column_result_t<DBOs, distinct_t<T>, void> : column_result_t<DBOs, T> {};

        template<class DBOs, class T>
        struct column_result_t<DBOs, all_t<T>, void> : column_result_t<DBOs, T> {};

        template<class DBOs, class L, class R>
        struct column_result_t<DBOs, conc_t<L, R>, void> {
            using type = std::string;
        };

        template<class DBOs, class L, class R>
        struct column_result_t<DBOs, add_t<L, R>, void> {
            using type = double;
        };

        template<class DBOs, class L, class R>
        struct column_result_t<DBOs, sub_t<L, R>, void> {
            using type = double;
        };

        template<class DBOs, class L, class R>
        struct column_result_t<DBOs, mul_t<L, R>, void> {
            using type = double;
        };

        template<class DBOs, class L, class R>
        struct column_result_t<DBOs, div_t<L, R>, void> {
            using type = double;
        };

        template<class DBOs, class L, class R>
        struct column_result_t<DBOs, mod_t<L, R>, void> {
            using type = double;
        };

        template<class DBOs, class L, class R>
        struct column_result_t<DBOs, bitwise_shift_left_t<L, R>, void> {
            using type = int;
        };

        template<class DBOs, class L, class R>
        struct column_result_t<DBOs, bitwise_shift_right_t<L, R>, void> {
            using type = int;
        };

        template<class DBOs, class L, class R>
        struct column_result_t<DBOs, bitwise_and_t<L, R>, void> {
            using type = int;
        };

        template<class DBOs, class L, class R>
        struct column_result_t<DBOs, bitwise_or_t<L, R>, void> {
            using type = int;
        };

        template<class DBOs, class T>
        struct column_result_t<DBOs, bitwise_not_t<T>, void> {
            using type = int;
        };

        template<class DBOs>
        struct column_result_t<DBOs, rowid_t, void> {
            using type = int64;
        };

        template<class DBOs>
        struct column_result_t<DBOs, oid_t, void> {
            using type = int64;
        };

        template<class DBOs>
        struct column_result_t<DBOs, _rowid_t, void> {
            using type = int64;
        };

        template<class DBOs, class T>
        struct column_result_t<DBOs, table_rowid_t<T>, void> {
            using type = int64;
        };

        template<class DBOs, class T>
        struct column_result_t<DBOs, table_oid_t<T>, void> {
            using type = int64;
        };

        template<class DBOs, class T>
        struct column_result_t<DBOs, table__rowid_t<T>, void> {
            using type = int64;
        };

        template<class DBOs, class T, class C>
        struct column_result_t<DBOs, alias_column_t<T, C>, void> : column_result_t<DBOs, C> {};

        template<class DBOs, class T, class F>
        struct column_result_t<DBOs, column_pointer<T, F>, void> : column_result_t<DBOs, F> {};

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
        template<class DBOs, class Moniker, class ColAlias>
        struct column_result_t<DBOs, column_pointer<Moniker, alias_holder<ColAlias>>, void> {
            using table_type = storage_pick_table_t<Moniker, DBOs>;
            using cte_mapper_type = cte_mapper_type_t<table_type>;

            // lookup ColAlias in the final column references
            using colalias_index =
                find_tuple_type<typename cte_mapper_type::final_colrefs_tuple, alias_holder<ColAlias>>;
            static_assert(colalias_index::value < std::tuple_size_v<typename cte_mapper_type::final_colrefs_tuple>,
                          "No such column mapped into the CTE.");
            using type = std::tuple_element_t<colalias_index::value, typename cte_mapper_type::fields_type>;
        };
#endif

        template<class DBOs, class... Args>
        struct column_result_t<DBOs, columns_t<Args...>, void>
            : conc_tuple<tuplify_t<column_result_of_t<DBOs, std::decay_t<Args>>>...> {};

        template<class DBOs, class T, class... Args>
        struct column_result_t<DBOs, struct_t<T, Args...>, void> {
            using type = structure<T, tuple_cat_t<tuplify_t<column_result_of_t<DBOs, std::decay_t<Args>>>...>>;
        };

        template<class DBOs, class T, class... Args>
        struct column_result_t<DBOs, select_t<T, Args...>> : column_result_t<DBOs, T> {};

        template<class DBOs, class T>
        struct column_result_t<DBOs, T, match_if<is_compound_operator, T>> {
            using type =
                polyfill::detected_t<common_type_of_t, column_result_for_tuple_t<DBOs, typename T::expressions_tuple>>;
            static_assert(!std::is_same<type, polyfill::nonesuch>::value,
                          "Compound select statements must return a common type");
        };

        template<class DBOs, class T>
        struct column_result_t<DBOs, T, match_if<is_binary_condition, T>> {
            using type = typename T::result_type;
        };

        template<class DBOs, class T, class X, class Y, class Z>
        struct column_result_t<DBOs, highlight_t<T, X, Y, Z>, void> {
            using type = std::string;
        };

        /**
         *  Result for the most simple queries like `SELECT 1`
         */
        template<class DBOs, class T>
        struct column_result_t<DBOs, T, match_if<std::is_arithmetic, T>> {
            using type = T;
        };

        /**
         *  Result for the most simple queries like `SELECT 'ototo'`
         */
        template<class DBOs>
        struct column_result_t<DBOs, const char*, void> {
            using type = std::string;
        };

        template<class DBOs>
        struct column_result_t<DBOs, std::string, void> {
            using type = std::string;
        };

        template<class DBOs, class T, class E>
        struct column_result_t<DBOs, as_t<T, E>, void> : column_result_t<DBOs, std::decay_t<E>> {};

        template<class DBOs, class T>
        struct column_result_t<DBOs, asterisk_t<T>, void>
            : storage_traits::storage_mapped_columns<DBOs, mapped_type_proxy_t<T>> {};

        template<class DBOs, class T>
        struct column_result_t<DBOs, object_t<T>, void> {
            using type = table_reference<T>;
        };

        template<class DBOs, class T, class E>
        struct column_result_t<DBOs, cast_t<T, E>, void> {
            using type = T;
        };

        template<class DBOs, class R, class T, class E, class... Args>
        struct column_result_t<DBOs, simple_case_t<R, T, E, Args...>, void> {
            using type = R;
        };

        template<class DBOs, class A, class T, class E>
        struct column_result_t<DBOs, like_t<A, T, E>, void> {
            using type = bool;
        };

        template<class DBOs, class A, class T>
        struct column_result_t<DBOs, glob_t<A, T>, void> {
            using type = bool;
        };

        template<class DBOs, class C>
        struct column_result_t<DBOs, negated_condition_t<C>, void> {
            using type = bool;
        };

        template<class DBOs, class T>
        struct column_result_t<DBOs, std::reference_wrapper<T>, void> : column_result_t<DBOs, T> {};
    }
}

// #include "mapped_type_proxy.h"

// #include "sync_schema_result.h"

// #include "table_info.h"

// #include "storage_impl.h"

// #include "journal_mode.h"

// #include "mapped_view.h"

#include "sqlite3.h"
#include <utility>  //  std::forward, std::move

// #include "row_extractor.h"

// #include "mapped_iterator.h"

#include "sqlite3.h"
#include <memory>  //  std::shared_ptr, std::make_shared
#include <utility>  //  std::move
#include <iterator>  //  std::input_iterator_tag
#include <system_error>  //  std::system_error
#include <functional>  //  std::bind

// #include "functional/cxx_universal.h"
//  ::ptrdiff_t
// #include "statement_finalizer.h"

#include "sqlite3.h"
#include <memory>  // std::unique_ptr
#include <type_traits>  // std::integral_constant

namespace sqlite_orm {

    /**
     *  Guard class which finalizes `sqlite3_stmt` in dtor
     */
    using statement_finalizer =
        std::unique_ptr<sqlite3_stmt, std::integral_constant<decltype(&sqlite3_finalize), sqlite3_finalize>>;
}

// #include "error_code.h"

// #include "object_from_column_builder.h"

#include "sqlite3.h"
#include <type_traits>  //  std::is_member_object_pointer
#include <utility>  //  std::move

// #include "functional/static_magic.h"

// #include "member_traits/member_traits.h"

// #include "table_reference.h"

// #include "row_extractor.h"

// #include "schema/column.h"

// #include "storage_lookup.h"

namespace sqlite_orm {

    namespace internal {

        struct object_from_column_builder_base {
            sqlite3_stmt* stmt = nullptr;
            int columnIndex = -1;

#ifndef SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
            object_from_column_builder_base(sqlite3_stmt* stmt, int columnIndex = -1) :
                stmt{stmt}, columnIndex{columnIndex} {}
#endif
        };

        /**
         *  Function object for building an object from a result row.
         */
        template<class O>
        struct object_from_column_builder : object_from_column_builder_base {
            using object_type = O;

            object_type& object;

            object_from_column_builder(object_type& object_, sqlite3_stmt* stmt_, int nextColumnIndex = 0) :
                object_from_column_builder_base{stmt_, nextColumnIndex - 1}, object(object_) {}

            template<class G, class S>
            void operator()(const column_field<G, S>& column) {
                const auto rowExtractor = row_value_extractor<member_field_type_t<G>>();
                auto value = rowExtractor.extract(this->stmt, ++this->columnIndex);
                static_if<std::is_member_object_pointer<G>::value>(
                    [&value, &object = this->object](const auto& column) {
                        object.*column.member_pointer = std::move(value);
                    },
                    [&value, &object = this->object](const auto& column) {
                        (object.*column.setter)(std::move(value));
                    })(column);
            }
        };

        /**
         *  Specialization for a table reference.
         *  
         *  This plays together with `column_result_of_t`, which returns `object_t<O>` as `table_referenece<O>`
         */
        template<class O, class DBOs>
        struct struct_extractor<table_reference<O>, DBOs> {
            const DBOs& db_objects;

            O extract(const char* columnText) const = delete;

            // note: expects to be called only from the top level, and therefore discards the index
            O extract(sqlite3_stmt* stmt, int&& /*nextColumnIndex*/ = 0) const {
                int columnIndex = 0;
                return this->extract(stmt, columnIndex);
            }

            O extract(sqlite3_stmt* stmt, int& columnIndex) const {
                O obj;
                object_from_column_builder<O> builder{obj, stmt, columnIndex};
                auto& table = pick_table<O>(this->db_objects);
                table.for_each_column(builder);
                columnIndex = builder.columnIndex;
                return obj;
            }

            O extract(sqlite3_value* value) const = delete;
        };
    }
}

// #include "storage_lookup.h"

// #include "util.h"

#include "sqlite3.h"
#include <string>  //  std::string
#include <utility>  //  std::move

// #include "error_code.h"

namespace sqlite_orm {

    /** 
     *  Escape the provided character in the given string by doubling it.
     *  @param str A copy of the original string
     *  @param char2Escape The character to escape
     */
    inline std::string sql_escape(std::string str, char char2Escape) {
        for(size_t pos = 0; (pos = str.find(char2Escape, pos)) != str.npos; pos += 2) {
            str.replace(pos, 1, 2, char2Escape);
        }

        return str;
    }

    /** 
     *  Quote the given string value using single quotes,
     *  escape containing single quotes by doubling them.
     */
    inline std::string quote_string_literal(std::string v) {
        constexpr char quoteChar = '\'';
        return quoteChar + sql_escape(std::move(v), quoteChar) + quoteChar;
    }

    /** 
     *  Quote the given string value using single quotes,
     *  escape containing single quotes by doubling them.
     */
    inline std::string quote_blob_literal(std::string v) {
        constexpr char quoteChar = '\'';
        return std::string{char('x'), quoteChar} + std::move(v) + quoteChar;
    }

    /** 
     *  Quote the given identifier using double quotes,
     *  escape containing double quotes by doubling them.
     */
    inline std::string quote_identifier(std::string identifier) {
        constexpr char quoteChar = '"';
        return quoteChar + sql_escape(std::move(identifier), quoteChar) + quoteChar;
    }

    namespace internal {
        // Wrapper to reduce boiler-plate code
        inline sqlite3_stmt* reset_stmt(sqlite3_stmt* stmt) {
            sqlite3_reset(stmt);
            return stmt;
        }

        // note: query is deliberately taken by value, such that it is thrown away early
        inline sqlite3_stmt* prepare_stmt(sqlite3* db, std::string query) {
            sqlite3_stmt* stmt;
            if(sqlite3_prepare_v2(db, query.c_str(), -1, &stmt, nullptr) != SQLITE_OK) {
                throw_translated_sqlite_error(db);
            }
            return stmt;
        }

        inline void perform_void_exec(sqlite3* db, const std::string& query) {
            int rc = sqlite3_exec(db, query.c_str(), nullptr, nullptr, nullptr);
            if(rc != SQLITE_OK) {
                throw_translated_sqlite_error(db);
            }
        }

        inline void perform_exec(sqlite3* db,
                                 const char* query,
                                 int (*callback)(void* data, int argc, char** argv, char**),
                                 void* user_data) {
            int rc = sqlite3_exec(db, query, callback, user_data, nullptr);
            if(rc != SQLITE_OK) {
                throw_translated_sqlite_error(db);
            }
        }

        inline void perform_exec(sqlite3* db,
                                 const std::string& query,
                                 int (*callback)(void* data, int argc, char** argv, char**),
                                 void* user_data) {
            return perform_exec(db, query.c_str(), callback, user_data);
        }

        template<int expected = SQLITE_DONE>
        void perform_step(sqlite3_stmt* stmt) {
            int rc = sqlite3_step(stmt);
            if(rc != expected) {
                throw_translated_sqlite_error(stmt);
            }
        }

        template<class L>
        void perform_step(sqlite3_stmt* stmt, L&& lambda) {
            switch(int rc = sqlite3_step(stmt)) {
                case SQLITE_ROW: {
                    lambda(stmt);
                } break;
                case SQLITE_DONE:
                    break;
                default: {
                    throw_translated_sqlite_error(stmt);
                }
            }
        }

        template<class L>
        void perform_steps(sqlite3_stmt* stmt, L&& lambda) {
            int rc;
            do {
                switch(rc = sqlite3_step(stmt)) {
                    case SQLITE_ROW: {
                        lambda(stmt);
                    } break;
                    case SQLITE_DONE:
                        break;
                    default: {
                        throw_translated_sqlite_error(stmt);
                    }
                }
            } while(rc != SQLITE_DONE);
        }
    }
}

namespace sqlite_orm {
    namespace internal {

        /*  
         *  (Legacy) Input iterator over a result set for a mapped object.
         */
        template<class O, class DBOs>
        class mapped_iterator {
          public:
            using db_objects_type = DBOs;

            using iterator_category = std::input_iterator_tag;
            using difference_type = ptrdiff_t;
            using value_type = O;
            using reference = O&;
            using pointer = O*;

          private:
            /**
                pointer to the db objects.
                only null for the default constructed iterator.
             */
            const db_objects_type* db_objects = nullptr;

            /**
             *  shared_ptr is used over unique_ptr here
             *  so that the iterator can be copyable.
             */
            std::shared_ptr<sqlite3_stmt> stmt;

            /**
             *  shared_ptr is used over unique_ptr here
             *  so that the iterator can be copyable.
             */
            std::shared_ptr<value_type> current;

            void extract_object() {
                this->current = std::make_shared<value_type>();
                object_from_column_builder<value_type> builder{*this->current, this->stmt.get()};
                auto& table = pick_table<value_type>(*this->db_objects);
                table.for_each_column(builder);
            }

            void step() {
                perform_step(this->stmt.get(), std::bind(&mapped_iterator::extract_object, this));
                if(!this->current) {
                    this->stmt.reset();
                }
            }

            void next() {
                this->current.reset();
                this->step();
            }

          public:
            mapped_iterator() = default;

            mapped_iterator(const db_objects_type& dbObjects, statement_finalizer stmt) :
                db_objects{&dbObjects}, stmt{std::move(stmt)} {
                this->step();
            }

            mapped_iterator(const mapped_iterator&) = default;
            mapped_iterator& operator=(const mapped_iterator&) = default;
            mapped_iterator(mapped_iterator&&) = default;
            mapped_iterator& operator=(mapped_iterator&&) = default;

            value_type& operator*() const {
                if(!this->stmt) SQLITE_ORM_CPP_UNLIKELY {
                    throw std::system_error{orm_error_code::trying_to_dereference_null_iterator};
                }
                return *this->current;
            }

            // note: should actually be only present for contiguous iterators
            value_type* operator->() const {
                return &(this->operator*());
            }

            mapped_iterator& operator++() {
                next();
                return *this;
            }

            mapped_iterator operator++(int) {
                auto tmp = *this;
                ++*this;
                return tmp;
            }

            friend bool operator==(const mapped_iterator& lhs, const mapped_iterator& rhs) {
                return lhs.current == rhs.current;
            }

#ifndef SQLITE_ORM_DEFAULT_COMPARISONS_SUPPORTED
            friend bool operator!=(const mapped_iterator& lhs, const mapped_iterator& rhs) {
                return !(lhs == rhs);
            }
#endif
        };
    }
}

// #include "ast_iterator.h"

#include <vector>  //  std::vector
#include <functional>  //  std::reference_wrapper

// #include "tuple_helper/tuple_iteration.h"

// #include "type_traits.h"

// #include "conditions.h"

// #include "alias.h"

// #include "select_constraints.h"

// #include "operators.h"

// #include "core_functions.h"

// #include "prepared_statement.h"

#include "sqlite3.h"
#include <memory>  //  std::unique_ptr
#include <iterator>  //  std::iterator_traits
#include <string>  //  std::string
#include <type_traits>  //  std::integral_constant, std::declval
#include <utility>  //  std::move, std::forward, std::pair
#include <tuple>  //  std::tuple

// #include "functional/cxx_universal.h"

// #include "functional/cxx_type_traits_polyfill.h"

// #include "functional/cxx_functional_polyfill.h"

// #include "tuple_helper/tuple_traits.h"

// #include "connection_holder.h"

#include "sqlite3.h"
#include <atomic>
#include <string>  //  std::string

// #include "error_code.h"

namespace sqlite_orm {

    namespace internal {

        struct connection_holder {

            connection_holder(std::string filename_) : filename(std::move(filename_)) {}

            void retain() {
                if(1 == ++this->_retain_count) {
                    auto rc = sqlite3_open(this->filename.c_str(), &this->db);
                    if(rc != SQLITE_OK) {
                        throw_translated_sqlite_error(db);
                    }
                }
            }

            void release() {
                if(0 == --this->_retain_count) {
                    auto rc = sqlite3_close(this->db);
                    if(rc != SQLITE_OK) {
                        throw_translated_sqlite_error(db);
                    }
                }
            }

            sqlite3* get() const {
                return this->db;
            }

            int retain_count() const {
                return this->_retain_count;
            }

            const std::string filename;

          protected:
            sqlite3* db = nullptr;
            std::atomic_int _retain_count{};
        };

        struct connection_ref {
            connection_ref(connection_holder& holder) : holder(&holder) {
                this->holder->retain();
            }

            connection_ref(const connection_ref& other) : holder(other.holder) {
                this->holder->retain();
            }

            // rebind connection reference
            connection_ref& operator=(const connection_ref& other) {
                if(other.holder != this->holder) {
                    this->holder->release();
                    this->holder = other.holder;
                    this->holder->retain();
                }

                return *this;
            }

            ~connection_ref() {
                this->holder->release();
            }

            sqlite3* get() const {
                return this->holder->get();
            }

          private:
            connection_holder* holder = nullptr;
        };
    }
}

// #include "select_constraints.h"

// #include "values.h"

#include <vector>  //  std::vector
#include <tuple>  //  std::tuple
#include <utility>  //  std::forward

// #include "functional/cxx_universal.h"

// #include "functional/cxx_type_traits_polyfill.h"

namespace sqlite_orm {

    namespace internal {

        template<class... Args>
        struct values_t {
            using args_tuple = std::tuple<Args...>;

            args_tuple tuple;
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_values_v = polyfill::is_specialization_of<T, values_t>::value;

        template<class T>
        using is_values = polyfill::bool_constant<is_values_v<T>>;

        template<class T>
        struct dynamic_values_t {
            std::vector<T> vector;
        };

    }

    template<class... Args>
    internal::values_t<Args...> values(Args... args) {
        return {{std::forward<Args>(args)...}};
    }

    template<class T>
    internal::dynamic_values_t<T> values(std::vector<T> vector) {
        return {{std::move(vector)}};
    }

}

// #include "table_reference.h"

// #include "mapped_type_proxy.h"

// #include "ast/upsert_clause.h"

#if SQLITE_VERSION_NUMBER >= 3024000
#include <tuple>  //  std::tuple
#include <utility>  //  std::forward, std::move
#endif

// #include "../functional/cxx_type_traits_polyfill.h"

namespace sqlite_orm {
    namespace internal {
#if SQLITE_VERSION_NUMBER >= 3024000
        template<class T, class A>
        struct upsert_clause;

        template<class... Args>
        struct conflict_target {
            using args_tuple = std::tuple<Args...>;

            args_tuple args;

            upsert_clause<args_tuple, std::tuple<>> do_nothing() {
                return {std::move(this->args), {}};
            }

            template<class... ActionsArgs>
            upsert_clause<args_tuple, std::tuple<ActionsArgs...>> do_update(ActionsArgs... actions) {
                return {std::move(this->args), {std::forward<ActionsArgs>(actions)...}};
            }
        };

        template<class... TargetArgs, class... ActionsArgs>
        struct upsert_clause<std::tuple<TargetArgs...>, std::tuple<ActionsArgs...>> {
            using target_args_tuple = std::tuple<TargetArgs...>;
            using actions_tuple = std::tuple<ActionsArgs...>;

            target_args_tuple target_args;

            actions_tuple actions;
        };
#endif

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_upsert_clause_v =
#if SQLITE_VERSION_NUMBER >= 3024000
            polyfill::is_specialization_of<T, upsert_clause>::value;
#else
            false;
#endif

        template<class T>
        using is_upsert_clause = polyfill::bool_constant<is_upsert_clause_v<T>>;
    }

#if SQLITE_VERSION_NUMBER >= 3024000
    /**
     *  ON CONFLICT upsert clause builder function.
     *  @example
     *  storage.insert(into<Employee>(),
     *            columns(&Employee::id, &Employee::name, &Employee::age, &Employee::address, &Employee::salary),
     *            values(std::make_tuple(3, "Sofia", 26, "Madrid", 15000.0),
     *                 std::make_tuple(4, "Doja", 26, "LA", 25000.0)),
     *            on_conflict(&Employee::id).do_update(set(c(&Employee::name) = excluded(&Employee::name),
     *                                           c(&Employee::age) = excluded(&Employee::age),
     *                                           c(&Employee::address) = excluded(&Employee::address),
     *                                           c(&Employee::salary) = excluded(&Employee::salary))));
     */
    template<class... Args>
    internal::conflict_target<Args...> on_conflict(Args... args) {
        return {{std::forward<Args>(args)...}};
    }
#endif
}

// #include "ast/set.h"

#include <tuple>  //  std::tuple, std::tuple_size
#include <string>  //  std::string
#include <vector>  //  std::vector
#include <sstream>  //  std::stringstream
#include <type_traits>  //  std::false_type, std::true_type

// #include "../tuple_helper/tuple_traits.h"

// #include "../table_name_collector.h"

#include <set>  //  std::set
#include <string>  //  std::string
#include <utility>  //  std::pair, std::move

// #include "functional/cxx_type_traits_polyfill.h"

// #include "type_traits.h"

// #include "mapped_type_proxy.h"

// #include "select_constraints.h"

// #include "alias.h"

// #include "core_functions.h"

// #include "storage_lookup.h"

namespace sqlite_orm {

    namespace internal {

        struct table_name_collector_base {
            using table_name_set = std::set<std::pair<std::string, std::string>>;

            table_name_set table_names;
        };

        template<class DBOs>
        struct table_name_collector : table_name_collector_base {
            using db_objects_type = DBOs;

            const db_objects_type& db_objects;

            table_name_collector() = default;

            table_name_collector(const db_objects_type& dbObjects) : db_objects{dbObjects} {}

            template<class T>
            void operator()(const T&) const {}

            template<class F, class O>
            void operator()(F O::*) {
                this->table_names.emplace(lookup_table_name<O>(this->db_objects), "");
            }

            template<class T, class F>
            void operator()(const column_pointer<T, F>&) {
                auto tableName = lookup_table_name<mapped_type_proxy_t<T>>(this->db_objects);
                this->table_names.emplace(std::move(tableName), alias_extractor<T>::as_alias());
            }

            template<class A, class C>
            void operator()(const alias_column_t<A, C>&) {
                // note: instead of accessing the column, we are interested in the type the column is aliased into
                auto tableName = lookup_table_name<mapped_type_proxy_t<A>>(this->db_objects);
                this->table_names.emplace(std::move(tableName), alias_extractor<A>::as_alias());
            }

            template<class T>
            void operator()(const count_asterisk_t<T>&) {
                auto tableName = lookup_table_name<T>(this->db_objects);
                if(!tableName.empty()) {
                    this->table_names.emplace(std::move(tableName), "");
                }
            }

            template<class T>
            void operator()(const asterisk_t<T>&) {
                auto tableName = lookup_table_name<mapped_type_proxy_t<T>>(this->db_objects);
                table_names.emplace(std::move(tableName), alias_extractor<T>::as_alias());
            }

            template<class T>
            void operator()(const object_t<T>&) {
                this->table_names.emplace(lookup_table_name<T>(this->db_objects), "");
            }

            template<class T>
            void operator()(const table_rowid_t<T>&) {
                this->table_names.emplace(lookup_table_name<T>(this->db_objects), "");
            }

            template<class T>
            void operator()(const table_oid_t<T>&) {
                this->table_names.emplace(lookup_table_name<T>(this->db_objects), "");
            }

            template<class T>
            void operator()(const table__rowid_t<T>&) {
                this->table_names.emplace(lookup_table_name<T>(this->db_objects), "");
            }

            template<class T, class X, class Y, class Z>
            void operator()(const highlight_t<T, X, Y, Z>&) {
                this->table_names.emplace(lookup_table_name<T>(this->db_objects), "");
            }
        };

        template<class DBOs, satisfies<is_db_objects, DBOs> = true>
        table_name_collector<DBOs> make_table_name_collector(const DBOs& dbObjects) {
            return {dbObjects};
        }

    }

}

namespace sqlite_orm {

    namespace internal {

        template<class T, class L>
        void iterate_ast(const T& t, L&& lambda);

        template<class... Args>
        struct set_t {
            using assigns_type = std::tuple<Args...>;

            assigns_type assigns;
        };

        template<class T>
        struct is_set : std::false_type {};

        template<class... Args>
        struct is_set<set_t<Args...>> : std::true_type {};

        struct dynamic_set_entry {
            std::string serialized_value;
        };

        template<class C>
        struct dynamic_set_t {
            using context_t = C;
            using entry_t = dynamic_set_entry;
            using const_iterator = typename std::vector<entry_t>::const_iterator;

            dynamic_set_t(const context_t& context_) : context(context_), collector(this->context.db_objects) {}

            dynamic_set_t(const dynamic_set_t& other) = default;
            dynamic_set_t(dynamic_set_t&& other) = default;
            dynamic_set_t& operator=(const dynamic_set_t& other) = default;
            dynamic_set_t& operator=(dynamic_set_t&& other) = default;

            template<class L, class R>
            void push_back(assign_t<L, R> assign) {
                auto newContext = this->context;
                newContext.skip_table_name = true;
                iterate_ast(assign, this->collector);
                std::stringstream ss;
                ss << serialize(assign.lhs, newContext) << ' ' << assign.serialize() << ' '
                   << serialize(assign.rhs, context);
                this->entries.push_back({ss.str()});
            }

            const_iterator begin() const {
                return this->entries.begin();
            }

            const_iterator end() const {
                return this->entries.end();
            }

            void clear() {
                this->entries.clear();
                this->collector.table_names.clear();
            }

            std::vector<entry_t> entries;
            context_t context;
            table_name_collector<typename context_t::db_objects_type> collector;
        };

        template<class C>
        struct is_set<dynamic_set_t<C>> : std::true_type {};

        template<class C>
        struct is_dynamic_set : std::false_type {};

        template<class C>
        struct is_dynamic_set<dynamic_set_t<C>> : std::true_type {};
    }

    /**
     *  SET keyword used in UPDATE ... SET queries.
     *  Args must have `assign_t` type. E.g. set(assign(&User::id, 5)) or set(c(&User::id) = 5)
     */
    template<class... Args>
    internal::set_t<Args...> set(Args... args) {
        using arg_tuple = std::tuple<Args...>;
        static_assert(std::tuple_size<arg_tuple>::value ==
                          internal::count_tuple<arg_tuple, internal::is_assign_t>::value,
                      "set function accepts assign operators only");
        return {std::make_tuple(std::forward<Args>(args)...)};
    }

    /**
     *  SET keyword used in UPDATE ... SET queries. It is dynamic version. It means use can add amount of arguments now known at compilation time but known at runtime.
     */
    template<class S>
    internal::dynamic_set_t<internal::serializer_context<typename S::db_objects_type>> dynamic_set(const S& storage) {
        internal::serializer_context_builder<S> builder(storage);
        return builder();
    }
}

namespace sqlite_orm {

    namespace internal {

        struct prepared_statement_base {
            sqlite3_stmt* stmt = nullptr;
            connection_ref con;

#ifndef SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
            prepared_statement_base(sqlite3_stmt* stmt, connection_ref con) : stmt{stmt}, con{std::move(con)} {}
#endif

            ~prepared_statement_base() {
                sqlite3_finalize(this->stmt);
            }

            std::string sql() const {
                // note: sqlite3 internally checks for null before calling
                // sqlite3_normalized_sql() or sqlite3_expanded_sql(), so check here, too, even if superfluous
                if(const char* sql = sqlite3_sql(this->stmt)) {
                    return sql;
                } else {
                    return {};
                }
            }

#if SQLITE_VERSION_NUMBER >= 3014000
            std::string expanded_sql() const {
                // note: must check return value due to SQLITE_OMIT_TRACE
                using char_ptr = std::unique_ptr<char, std::integral_constant<decltype(&sqlite3_free), sqlite3_free>>;
                if(char_ptr sql{sqlite3_expanded_sql(this->stmt)}) {
                    return sql.get();
                } else {
                    return {};
                }
            }
#endif
#if SQLITE_VERSION_NUMBER >= 3026000 and defined(SQLITE_ENABLE_NORMALIZE)
            std::string normalized_sql() const {
                if(const char* sql = sqlite3_normalized_sql(this->stmt)) {
                    return sql;
                } else {
                    return {};
                }
            }
#endif

#ifdef SQLITE_ORM_STRING_VIEW_SUPPORTED
            std::string_view column_name(int index) const {
                return sqlite3_column_name(stmt, index);
            }
#endif
        };

        template<class T>
        struct prepared_statement_t : prepared_statement_base {
            using expression_type = T;

            expression_type expression;

            prepared_statement_t(T expression_, sqlite3_stmt* stmt_, connection_ref con_) :
                prepared_statement_base{stmt_, std::move(con_)}, expression(std::move(expression_)) {}

            prepared_statement_t(prepared_statement_t&& prepared_stmt) :
                prepared_statement_base{prepared_stmt.stmt, std::move(prepared_stmt.con)},
                expression(std::move(prepared_stmt.expression)) {
                prepared_stmt.stmt = nullptr;
            }
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_prepared_statement_v =
            polyfill::is_specialization_of<T, prepared_statement_t>::value;

        template<class T>
        struct is_prepared_statement : polyfill::bool_constant<is_prepared_statement_v<T>> {};

        /**
         *  T - type of object to obtain from a database
         */
        template<class T, class R, class... Args>
        struct get_all_t {
            using type = T;
            using return_type = R;

            using conditions_type = std::tuple<Args...>;

            conditions_type conditions;
        };

        template<class T, class R, class... Args>
        struct get_all_pointer_t {
            using type = T;
            using return_type = R;

            using conditions_type = std::tuple<Args...>;

            conditions_type conditions;
        };

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
        template<class T, class R, class... Args>
        struct get_all_optional_t {
            using type = T;
            using return_type = R;

            using conditions_type = std::tuple<Args...>;

            conditions_type conditions;
        };
#endif  // SQLITE_ORM_OPTIONAL_SUPPORTED

        template<class S, class... Wargs>
        struct update_all_t {
            using set_type = S;
            using conditions_type = std::tuple<Wargs...>;

            static_assert(is_set<S>::value, "update_all_t must have set or dynamic set as the first argument");

            set_type set;
            conditions_type conditions;
        };

        template<class T, class... Args>
        struct remove_all_t {
            using type = T;
            using conditions_type = std::tuple<Args...>;

            conditions_type conditions;
        };

        template<class T, class... Ids>
        struct get_t {
            using type = T;
            using ids_type = std::tuple<Ids...>;

            ids_type ids;
        };

        template<class T, class... Ids>
        struct get_pointer_t {
            using type = T;
            using ids_type = std::tuple<Ids...>;

            ids_type ids;
        };

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
        template<class T, class... Ids>
        struct get_optional_t {
            using type = T;
            using ids_type = std::tuple<Ids...>;

            ids_type ids;
        };
#endif  // SQLITE_ORM_OPTIONAL_SUPPORTED

        template<class T>
        struct update_t {
            using type = T;

            type object;
        };

        template<class T, class... Ids>
        struct remove_t {
            using type = T;
            using ids_type = std::tuple<Ids...>;

            ids_type ids;
        };

        template<class T>
        struct insert_t {
            using type = T;

            type object;
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_insert_v = polyfill::is_specialization_of<T, insert_t>::value;

        template<class T>
        struct is_insert : polyfill::bool_constant<is_insert_v<T>> {};

        template<class T, class... Cols>
        struct insert_explicit {
            using type = T;
            using columns_type = columns_t<Cols...>;

            type obj;
            columns_type columns;
        };

        template<class T>
        struct replace_t {
            using type = T;

            type object;
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_replace_v = polyfill::is_specialization_of<T, replace_t>::value;

        template<class T>
        struct is_replace : polyfill::bool_constant<is_replace_v<T>> {};

        template<class It, class Projection, class O>
        struct insert_range_t {
            using iterator_type = It;
            using transformer_type = Projection;
            using object_type = O;

            std::pair<iterator_type, iterator_type> range;
            transformer_type transformer;
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_insert_range_v =
            polyfill::is_specialization_of<T, insert_range_t>::value;

        template<class T>
        struct is_insert_range : polyfill::bool_constant<is_insert_range_v<T>> {};

        template<class It, class Projection, class O>
        struct replace_range_t {
            using iterator_type = It;
            using transformer_type = Projection;
            using object_type = O;

            std::pair<iterator_type, iterator_type> range;
            transformer_type transformer;
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_replace_range_v =
            polyfill::is_specialization_of<T, replace_range_t>::value;

        template<class T>
        struct is_replace_range : polyfill::bool_constant<is_replace_range_v<T>> {};

        template<class... Args>
        struct insert_raw_t {
            using args_tuple = std::tuple<Args...>;

            args_tuple args;
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_insert_raw_v = polyfill::is_specialization_of<T, insert_raw_t>::value;

        template<class T>
        struct is_insert_raw : polyfill::bool_constant<is_insert_raw_v<T>> {};

        template<class... Args>
        struct replace_raw_t {
            using args_tuple = std::tuple<Args...>;

            args_tuple args;
        };

        template<class T>
        SQLITE_ORM_INLINE_VAR constexpr bool is_replace_raw_v = polyfill::is_specialization_of<T, replace_raw_t>::value;

        template<class T>
        struct is_replace_raw : polyfill::bool_constant<is_replace_raw_v<T>> {};

        struct default_values_t {};

        template<class T>
        using is_default_values = std::is_same<T, default_values_t>;

        enum class conflict_action {
            abort,
            fail,
            ignore,
            replace,
            rollback,
        };

        struct insert_constraint {
            conflict_action action = conflict_action::abort;

#ifndef SQLITE_ORM_AGGREGATE_NSDMI_SUPPORTED
            insert_constraint(conflict_action action) : action{action} {}
#endif
        };

        template<class T>
        using is_insert_constraint = std::is_same<T, insert_constraint>;
    }

    inline internal::insert_constraint or_rollback() {
        return {internal::conflict_action::rollback};
    }

    inline internal::insert_constraint or_replace() {
        return {internal::conflict_action::replace};
    }

    inline internal::insert_constraint or_ignore() {
        return {internal::conflict_action::ignore};
    }

    inline internal::insert_constraint or_fail() {
        return {internal::conflict_action::fail};
    }

    inline internal::insert_constraint or_abort() {
        return {internal::conflict_action::abort};
    }

    /**
     *  Use this function to add `DEFAULT VALUES` modifier to raw `INSERT`.
     *
     *  @example
     *  ```
     *  storage.insert(into<Singer>(), default_values());
     *  ```
     */
    inline internal::default_values_t default_values() {
        return {};
    }

    /**
     *  Raw insert statement creation routine. Use this if `insert` with object does not fit you. This insert is designed to be able
     *  to call any type of `INSERT` query with no limitations.
     *  @example
     *  ```sql
     *  INSERT INTO users (id, name) VALUES(5, 'Little Mix')
     *  ```
     *  will be
     *  ```c++
     *  auto statement = storage.prepare(insert(into<User>, columns(&User::id, &User::name), values(std::make_tuple(5, "Little Mix"))));
     *  storage.execute(statement));
     *  ```
     *  One more example:
     *  ```sql
     *  INSERT INTO singers (name) VALUES ('Sofia Reyes')('Kungs')
     *  ```
     *  will be
     *  ```c++
     *  auto statement = storage.prepare(insert(into<Singer>(), columns(&Singer::name), values(std::make_tuple("Sofia Reyes"), std::make_tuple("Kungs"))));
     *  storage.execute(statement));
     *  ```
     *  One can use `default_values` to add `DEFAULT VALUES` modifier:
     *  ```sql
     *  INSERT INTO users DEFAULT VALUES
     *  ```
     *  will be
     *  ```c++
     *  auto statement = storage.prepare(insert(into<Singer>(), default_values()));
     *  storage.execute(statement));
     *  ```
     *  Also one can use `INSERT OR ABORT`/`INSERT OR FAIL`/`INSERT OR IGNORE`/`INSERT OR REPLACE`/`INSERT ROLLBACK`:
     *  ```c++
     *  auto statement = storage.prepare(insert(or_ignore(), into<Singer>(), columns(&Singer::name), values(std::make_tuple("Sofia Reyes"), std::make_tuple("Kungs"))));
     *  auto statement2 = storage.prepare(insert(or_rollback(), into<Singer>(), default_values()));
     *  auto statement3 = storage.prepare(insert(or_abort(), into<User>, columns(&User::id, &User::name), values(std::make_tuple(5, "Little Mix"))));
     *  ```
     */
    template<class... Args>
    internal::insert_raw_t<Args...> insert(Args... args) {
        using args_tuple = std::tuple<Args...>;
        using internal::count_tuple;
        using internal::is_columns;
        using internal::is_insert_constraint;
        using internal::is_into;
        using internal::is_select;
        using internal::is_upsert_clause;
        using internal::is_values;

        constexpr int orArgsCount = count_tuple<args_tuple, is_insert_constraint>::value;
        static_assert(orArgsCount < 2, "Raw insert must have only one OR... argument");

        constexpr int intoArgsCount = count_tuple<args_tuple, is_into>::value;
        static_assert(intoArgsCount != 0, "Raw insert must have into<T> argument");
        static_assert(intoArgsCount < 2, "Raw insert must have only one into<T> argument");

        constexpr int columnsArgsCount = count_tuple<args_tuple, is_columns>::value;
        static_assert(columnsArgsCount < 2, "Raw insert must have only one columns(...) argument");

        constexpr int valuesArgsCount = count_tuple<args_tuple, is_values>::value;
        static_assert(valuesArgsCount < 2, "Raw insert must have only one values(...) argument");

        constexpr int defaultValuesCount = count_tuple<args_tuple, internal::is_default_values>::value;
        static_assert(defaultValuesCount < 2, "Raw insert must have only one default_values() argument");

        constexpr int selectsArgsCount = count_tuple<args_tuple, is_select>::value;
        static_assert(selectsArgsCount < 2, "Raw insert must have only one select(...) argument");

        constexpr int upsertClausesCount = count_tuple<args_tuple, is_upsert_clause>::value;
        static_assert(upsertClausesCount <= 2, "Raw insert can contain 2 instances of upsert clause maximum");

        constexpr int argsCount = int(std::tuple_size<args_tuple>::value);
        static_assert(argsCount == intoArgsCount + columnsArgsCount + valuesArgsCount + defaultValuesCount +
                                       selectsArgsCount + orArgsCount + upsertClausesCount,
                      "Raw insert has invalid arguments");

        return {{std::forward<Args>(args)...}};
    }

    /**
     *  Raw replace statement creation routine. Use this if `replace` with object does not fit you. This replace is designed to be able
     *  to call any type of `REPLACE` query with no limitations. Actually this is the same query as raw insert except `OR...` option existance.
     *  @example
     *  ```sql
     *  REPLACE INTO users (id, name) VALUES(5, 'Little Mix')
     *  ```
     *  will be
     *  ```c++
     *  auto statement = storage.prepare(replace(into<User>, columns(&User::id, &User::name), values(std::make_tuple(5, "Little Mix"))));
     *  storage.execute(statement));
     *  ```
     *  One more example:
     *  ```sql
     *  REPLACE INTO singers (name) VALUES ('Sofia Reyes')('Kungs')
     *  ```
     *  will be
     *  ```c++
     *  auto statement = storage.prepare(replace(into<Singer>(), columns(&Singer::name), values(std::make_tuple("Sofia Reyes"), std::make_tuple("Kungs"))));
     *  storage.execute(statement));
     *  ```
     *  One can use `default_values` to add `DEFAULT VALUES` modifier:
     *  ```sql
     *  REPLACE INTO users DEFAULT VALUES
     *  ```
     *  will be
     *  ```c++
     *  auto statement = storage.prepare(replace(into<Singer>(), default_values()));
     *  storage.execute(statement));
     *  ```
     */
    template<class... Args>
    internal::replace_raw_t<Args...> replace(Args... args) {
        using args_tuple = std::tuple<Args...>;
        using internal::count_tuple;
        using internal::is_columns;
        using internal::is_into;
        using internal::is_values;

        constexpr int intoArgsCount = count_tuple<args_tuple, is_into>::value;
        static_assert(intoArgsCount != 0, "Raw replace must have into<T> argument");
        static_assert(intoArgsCount < 2, "Raw replace must have only one into<T> argument");

        constexpr int columnsArgsCount = count_tuple<args_tuple, is_columns>::value;
        static_assert(columnsArgsCount < 2, "Raw replace must have only one columns(...) argument");

        constexpr int valuesArgsCount = count_tuple<args_tuple, is_values>::value;
        static_assert(valuesArgsCount < 2, "Raw replace must have only one values(...) argument");

        constexpr int defaultValuesCount = count_tuple<args_tuple, internal::is_default_values>::value;
        static_assert(defaultValuesCount < 2, "Raw replace must have only one default_values() argument");

        constexpr int selectsArgsCount = count_tuple<args_tuple, internal::is_select>::value;
        static_assert(selectsArgsCount < 2, "Raw replace must have only one select(...) argument");

        constexpr int argsCount = int(std::tuple_size<args_tuple>::value);
        static_assert(argsCount ==
                          intoArgsCount + columnsArgsCount + valuesArgsCount + defaultValuesCount + selectsArgsCount,
                      "Raw replace has invalid arguments");

        return {{std::forward<Args>(args)...}};
    }

    /**
     *  Create a replace range statement.
     *  The objects in the range are transformed using the specified projection, which defaults to identity projection.
     *
     *  @example
     *  ```
     *  std::vector<User> users;
     *  users.push_back(User{1, "Leony"});
     *  auto statement = storage.prepare(replace_range(users.begin(), users.end()));
     *  storage.execute(statement);
     *  ```
     *  @example
     *  ```
     *  std::vector<std::unique_ptr<User>> userPointers;
     *  userPointers.push_back(std::make_unique<User>(1, "Eneli"));
     *  auto statement = storage.prepare(replace_range(userPointers.begin(), userPointers.end(), &std::unique_ptr<User>::operator*));
     *  storage.execute(statement);
     *  ```
     */
    template<class It, class Projection = polyfill::identity>
    auto replace_range(It from, It to, Projection project = {}) {
        using O = std::decay_t<decltype(polyfill::invoke(std::declval<Projection>(), *std::declval<It>()))>;
        return internal::replace_range_t<It, Projection, O>{{std::move(from), std::move(to)}, std::move(project)};
    }

    /*
     *  Create a replace range statement.
     *  Overload of `replace_range(It, It, Projection)` with explicit object type template parameter.
     */
    template<class O, class It, class Projection = polyfill::identity>
    internal::replace_range_t<It, Projection, O> replace_range(It from, It to, Projection project = {}) {
        return {{std::move(from), std::move(to)}, std::move(project)};
    }

    /**
     *  Create an insert range statement.
     *  The objects in the range are transformed using the specified projection, which defaults to identity projection.
     *  
     *  @example
     *  ```
     *  std::vector<User> users;
     *  users.push_back(User{1, "Leony"});
     *  auto statement = storage.prepare(insert_range(users.begin(), users.end()));
     *  storage.execute(statement);
     *  ```
     *  @example
     *  ```
     *  std::vector<std::unique_ptr<User>> userPointers;
     *  userPointers.push_back(std::make_unique<User>(1, "Eneli"));
     *  auto statement = storage.prepare(insert_range(userPointers.begin(), userPointers.end(), &std::unique_ptr<User>::operator*));
     *  storage.execute(statement);
     *  ```
     */
    template<class It, class Projection = polyfill::identity>
    auto insert_range(It from, It to, Projection project = {}) {
        using O = std::decay_t<decltype(polyfill::invoke(std::declval<Projection>(), *std::declval<It>()))>;
        return internal::insert_range_t<It, Projection, O>{{std::move(from), std::move(to)}, std::move(project)};
    }

    /*
     *  Create an insert range statement.
     *  Overload of `insert_range(It, It, Projection)` with explicit object type template parameter.
     */
    template<class O, class It, class Projection = polyfill::identity>
    internal::insert_range_t<It, Projection, O> insert_range(It from, It to, Projection project = {}) {
        return {{std::move(from), std::move(to)}, std::move(project)};
    }

    /**
     *  Create a replace statement.
     *  T is an object type mapped to a storage.
     *  Usage: storage.replace(myUserInstance);
     *  Parameter obj is accepted by value. If you want to accept it by ref
     *  please use std::ref function: storage.replace(std::ref(myUserInstance));
     */
    template<class T>
    internal::replace_t<T> replace(T obj) {
        return {std::move(obj)};
    }

    /**
     *  Create an insert statement.
     *  T is an object type mapped to a storage.
     *  Usage: storage.insert(myUserInstance);
     *  Parameter obj is accepted by value. If you want to accept it by ref
     *  please use std::ref function: storage.insert(std::ref(myUserInstance));
     */
    template<class T>
    internal::insert_t<T> insert(T obj) {
        return {std::move(obj)};
    }

    /**
     *  Create an explicit insert statement.
     *  T is an object type mapped to a storage.
     *  Cols is columns types aparameter pack. Must contain member pointers
     *  Usage: storage.insert(myUserInstance, columns(&User::id, &User::name));
     *  Parameter obj is accepted by value. If you want to accept it by ref
     *  please use std::ref function: storage.insert(std::ref(myUserInstance), columns(&User::id, &User::name));
     */
    template<class T, class... Cols>
    internal::insert_explicit<T, Cols...> insert(T obj, internal::columns_t<Cols...> cols) {
        return {std::move(obj), std::move(cols)};
    }

    /**
     *  Create a remove statement
     *  T is an object type mapped to a storage.
     *  Usage: remove<User>(5);
     */
    template<class T, class... Ids>
    internal::remove_t<T, Ids...> remove(Ids... ids) {
        return {{std::forward<Ids>(ids)...}};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Create a remove statement
     *  `table` is an explicitly specified table reference of a mapped object to be extracted.
     *  Usage: remove<user_table>(5);
     */
    template<orm_table_reference auto table, class... Ids>
    auto remove(Ids... ids) {
        return remove<internal::auto_decay_table_ref_t<table>>(std::forward<Ids>(ids)...);
    }
#endif

    /**
     *  Create an update statement.
     *  T is an object type mapped to a storage.
     *  Usage: storage.update(myUserInstance);
     *  Parameter obj is accepted by value. If you want to accept it by ref
     *  please use std::ref function: storage.update(std::ref(myUserInstance));
     */
    template<class T>
    internal::update_t<T> update(T obj) {
        return {std::move(obj)};
    }

    /**
     *  Create a get statement.
     *  T is an object type mapped to a storage.
     *  Usage: get<User>(5);
     */
    template<class T, class... Ids>
    internal::get_t<T, Ids...> get(Ids... ids) {
        return {{std::forward<Ids>(ids)...}};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Create a get statement.
     *  `table` is an explicitly specified table reference of a mapped object to be extracted.
     *  Usage: get<user_table>(5);
     */
    template<orm_table_reference auto table, class... Ids>
    auto get(Ids... ids) {
        return get<internal::auto_decay_table_ref_t<table>>(std::forward<Ids>(ids)...);
    }
#endif

    /**
     *  Create a get pointer statement.
     *  T is an object type mapped to a storage.
     *  Usage: get_pointer<User>(5);
     */
    template<class T, class... Ids>
    internal::get_pointer_t<T, Ids...> get_pointer(Ids... ids) {
        return {{std::forward<Ids>(ids)...}};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Create a get pointer statement.
     *  `table` is an explicitly specified table reference of a mapped object to be extracted.
     *  Usage: get_pointer<user_table>(5);
     */
    template<orm_table_reference auto table, class... Ids>
    auto get_pointer(Ids... ids) {
        return get_pointer<internal::auto_decay_table_ref_t<table>>(std::forward<Ids>(ids)...);
    }
#endif

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
    /**
     *  Create a get optional statement.
     *  T is an object type mapped to a storage.
     *  Usage: get_optional<User>(5);
     */
    template<class T, class... Ids>
    internal::get_optional_t<T, Ids...> get_optional(Ids... ids) {
        return {{std::forward<Ids>(ids)...}};
    }
#endif  // SQLITE_ORM_OPTIONAL_SUPPORTED

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Create a get optional statement.
     *  `table` is an explicitly specified table reference of a mapped object to be extracted.
     *  Usage: get_optional<user_table>(5);
     */
    template<orm_table_reference auto table, class... Ids>
    auto get_optional(Ids... ids) {
        return get_optional<internal::auto_decay_table_ref_t<table>>(std::forward<Ids>(ids)...);
    }
#endif

    /**
     *  Create a remove all statement.
     *  T is an object type mapped to a storage.
     *  Usage: storage.remove_all<User>(...);
     */
    template<class T, class... Args>
    internal::remove_all_t<T, Args...> remove_all(Args... args) {
        using args_tuple = std::tuple<Args...>;
        internal::validate_conditions<args_tuple>();
        return {{std::forward<Args>(args)...}};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Create a remove all statement.
     *  `table` is an explicitly specified table reference of a mapped object to be extracted.
     *  Usage: storage.remove_all<user_table>(...);
     */
    template<orm_table_reference auto table, class... Args>
    auto remove_all(Args... args) {
        return remove_all<internal::auto_decay_table_ref_t<table>>(std::forward<Args>(args)...);
    }
#endif

    /**
     *  Create a get all statement.
     *  T is an explicitly specified object mapped to a storage or a table alias.
     *  R is a container type. std::vector<T> is default
     *  Usage: storage.prepare(get_all<User>(...));
     */
    template<class T, class R = std::vector<internal::mapped_type_proxy_t<T>>, class... Args>
    internal::get_all_t<T, R, Args...> get_all(Args... conditions) {
        using conditions_tuple = std::tuple<Args...>;
        internal::validate_conditions<conditions_tuple>();
        return {{std::forward<Args>(conditions)...}};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Create a get all statement.
     *  `mapped` is an explicitly specified table reference or table alias to be extracted.
     *  `R` is the container return type, which must have a `R::push_back(T&&)` method, and defaults to `std::vector<T>`
     *  Usage: storage.get_all<sqlite_schema>(...);
     */
    template<orm_refers_to_table auto mapped,
             class R = std::vector<internal::mapped_type_proxy_t<decltype(mapped)>>,
             class... Args>
    auto get_all(Args&&... conditions) {
        return get_all<internal::auto_decay_table_ref_t<mapped>, R>(std::forward<Args>(conditions)...);
    }
#endif

    /**
     *  Create an update all statement.
     *  Usage: storage.update_all(set(...), ...);
     */
    template<class S, class... Wargs>
    internal::update_all_t<S, Wargs...> update_all(S set, Wargs... wh) {
        static_assert(internal::is_set<S>::value, "first argument in update_all can be either set or dynamic_set");
        using args_tuple = std::tuple<Wargs...>;
        internal::validate_conditions<args_tuple>();
        return {std::move(set), {std::forward<Wargs>(wh)...}};
    }

    /**
     *  Create a get all pointer statement.
     *  T is an object type mapped to a storage.
     *  R is a container return type. std::vector<std::unique_ptr<T>> is default
     *  Usage: storage.prepare(get_all_pointer<User>(...));
     */
    template<class T, class R = std::vector<std::unique_ptr<T>>, class... Args>
    internal::get_all_pointer_t<T, R, Args...> get_all_pointer(Args... conditions) {
        using conditions_tuple = std::tuple<Args...>;
        internal::validate_conditions<conditions_tuple>();
        return {{std::forward<Args>(conditions)...}};
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Create a get all pointer statement.
     *  `table` is an explicitly specified table reference of a mapped object to be extracted.
     *  R is a container return type. std::vector<std::unique_ptr<T>> is default
     *  Usage: storage.prepare(get_all_pointer<user_table>(...));
     */
    template<orm_table_reference auto table,
             class R = std::vector<internal::auto_decay_table_ref_t<table>>,
             class... Args>
    auto get_all_pointer(Args... conditions) {
        return get_all_pointer<internal::auto_decay_table_ref_t<table>, R>(std::forward<Args>(conditions)...);
    }
#endif

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
    /**
     *  Create a get all optional statement.
     *  T is an object type mapped to a storage.
     *  R is a container return type. std::vector<std::optional<T>> is default
     *  Usage: storage.get_all_optional<User>(...);
     */
    template<class T, class R = std::vector<std::optional<T>>, class... Args>
    internal::get_all_optional_t<T, R, Args...> get_all_optional(Args... conditions) {
        using conditions_tuple = std::tuple<Args...>;
        internal::validate_conditions<conditions_tuple>();
        return {{std::forward<Args>(conditions)...}};
    }
#endif  // SQLITE_ORM_OPTIONAL_SUPPORTED

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    /**
     *  Create a get all optional statement.
     *  `table` is an explicitly specified table reference of a mapped object to be extracted.
     *  R is a container return type. std::vector<std::optional<T>> is default
     *  Usage: storage.get_all_optional<user_table>(...);
     */
    template<orm_table_reference auto table,
             class R = std::vector<internal::auto_decay_table_ref_t<table>>,
             class... Args>
    auto get_all_optional(Args&&... conditions) {
        return get_all_optional<internal::auto_decay_table_ref_t<table>, R>(std::forward<Args>(conditions)...);
    }
#endif
}

// #include "values.h"

// #include "function.h"

// #include "ast/excluded.h"

#include <utility>  //  std::move

namespace sqlite_orm {
    namespace internal {

        template<class T>
        struct excluded_t {
            using expression_type = T;

            expression_type expression;
        };
    }

    template<class T>
    internal::excluded_t<T> excluded(T expression) {
        return {std::move(expression)};
    }
}

// #include "ast/upsert_clause.h"

// #include "ast/where.h"

// #include "ast/into.h"

// #include "ast/group_by.h"

// #include "ast/exists.h"

#include <utility>  //  std::move

// #include "../tags.h"

namespace sqlite_orm {
    namespace internal {

        template<class T>
        struct exists_t : condition_t, negatable_t {
            using expression_type = T;
            using self = exists_t<expression_type>;

            expression_type expression;

            exists_t(expression_type expression_) : expression(std::move(expression_)) {}
        };
    }

    /**
     *  EXISTS(condition).
     *  Example: storage.select(columns(&Agent::code, &Agent::name, &Agent::workingArea, &Agent::comission),
         where(exists(select(asterisk<Customer>(),
         where(is_equal(&Customer::grade, 3) and
         is_equal(&Agent::code, &Customer::agentCode))))),
         order_by(&Agent::comission));
     */
    template<class T>
    internal::exists_t<T> exists(T expression) {
        return {std::move(expression)};
    }
}

// #include "ast/set.h"

// #include "ast/match.h"

namespace sqlite_orm {
    namespace internal {

        template<class T, class X>
        struct match_t {
            using mapped_type = T;
            using argument_type = X;

            argument_type argument;

            match_t(argument_type argument) : argument(std::move(argument)) {}
        };
    }

    template<class T, class X>
    internal::match_t<T, X> match(X argument) {
        return {std::move(argument)};
    }
}

namespace sqlite_orm {

    namespace internal {

        /**
         *  ast_iterator accepts any expression and a callable object
         *  which will be called for any node of provided expression.
         *  E.g. if we pass `where(is_equal(5, max(&User::id, 10))` then
         *  callable object will be called with 5, &User::id and 10.
         *  ast_iterator is used in finding literals to be bound to
         *  a statement, and to collect table names.
         *  
         *  Note that not all leaves of the expression tree are always visited:
         *  Column expressions can be more complex, but are passed as a whole to the callable.
         *  Examples are `column_pointer<>` and `alias_column_t<>`.
         *  
         *  To use `ast_iterator` call `iterate_ast(object, callable);`
         *  
         *  `T` is an ast element, e.g. where_t
         */
        template<class T, class SFINAE = void>
        struct ast_iterator {
            using node_type = T;

            /**
             *  L is a callable type. Mostly is a templated lambda
             */
            template<class L>
            void operator()(const T& t, L& lambda) const {
                lambda(t);
            }
        };

        /**
         *  Simplified API
         */
        template<class T, class L>
        void iterate_ast(const T& t, L&& lambda) {
            ast_iterator<T> iterator;
            iterator(t, lambda);
        }

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
        template<class T>
        struct ast_iterator<as_optional_t<T>, void> {
            using node_type = as_optional_t<T>;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_ast(node.value, lambda);
            }
        };
#endif  //  SQLITE_ORM_OPTIONAL_SUPPORTED

        template<class T>
        struct ast_iterator<std::reference_wrapper<T>, void> {
            using node_type = std::reference_wrapper<T>;

            template<class L>
            void operator()(const node_type& expression, L& lambda) const {
                iterate_ast(expression.get(), lambda);
            }
        };

        template<class T, class X>
        struct ast_iterator<match_t<T, X>, void> {
            using node_type = match_t<T, X>;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_ast(node.argument, lambda);
            }
        };

        template<class... Args>
        struct ast_iterator<group_by_t<Args...>, void> {
            using node_type = group_by_t<Args...>;

            template<class L>
            void operator()(const node_type& expression, L& lambda) const {
                iterate_ast(expression.args, lambda);
            }
        };

        template<class T, class X, class Y, class Z>
        struct ast_iterator<highlight_t<T, X, Y, Z>, void> {
            using node_type = highlight_t<T, X, Y, Z>;

            template<class L>
            void operator()(const node_type& expression, L& lambda) const {
                lambda(expression);
                iterate_ast(expression.argument0, lambda);
                iterate_ast(expression.argument1, lambda);
                iterate_ast(expression.argument2, lambda);
            }
        };

        template<class T>
        struct ast_iterator<excluded_t<T>, void> {
            using node_type = excluded_t<T>;

            template<class L>
            void operator()(const node_type& expression, L& lambda) const {
                iterate_ast(expression.expression, lambda);
            }
        };

        template<class T>
        struct ast_iterator<T, match_if<is_upsert_clause, T>> {
            using node_type = T;

            template<class L>
            void operator()(const node_type& expression, L& lambda) const {
                iterate_ast(expression.actions, lambda);
            }
        };

        template<class C>
        struct ast_iterator<where_t<C>, void> {
            using node_type = where_t<C>;

            template<class L>
            void operator()(const node_type& expression, L& lambda) const {
                iterate_ast(expression.expression, lambda);
            }
        };

        template<class T>
        struct ast_iterator<
            T,
            std::enable_if_t<polyfill::disjunction<is_binary_condition<T>, is_binary_operator<T>>::value>> {
            using node_type = T;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_ast(node.lhs, lambda);
                iterate_ast(node.rhs, lambda);
            }
        };

        template<class L, class R>
        struct ast_iterator<is_equal_with_table_t<L, R>, void> {
            using node_type = is_equal_with_table_t<L, R>;

            template<class C>
            void operator()(const node_type& node, C& lambda) const {
                iterate_ast(node.rhs, lambda);
            }
        };

        template<class C>
        struct ast_iterator<C, std::enable_if_t<polyfill::disjunction<is_columns<C>, is_struct<C>>::value>> {
            using node_type = C;

            template<class L>
            void operator()(const node_type& cols, L& lambda) const {
                iterate_ast(cols.columns, lambda);
            }
        };

        template<class L, class A>
        struct ast_iterator<dynamic_in_t<L, A>, void> {
            using node_type = dynamic_in_t<L, A>;

            template<class C>
            void operator()(const node_type& in, C& lambda) const {
                iterate_ast(in.left, lambda);
                iterate_ast(in.argument, lambda);
            }
        };

        template<class L, class... Args>
        struct ast_iterator<in_t<L, Args...>, void> {
            using node_type = in_t<L, Args...>;

            template<class C>
            void operator()(const node_type& in, C& lambda) const {
                iterate_ast(in.left, lambda);
                iterate_ast(in.argument, lambda);
            }
        };

        template<class T>
        struct ast_iterator<std::vector<T>, void> {
            using node_type = std::vector<T>;

            template<class L>
            void operator()(const node_type& vec, L& lambda) const {
                for(auto& i: vec) {
                    iterate_ast(i, lambda);
                }
            }
        };

        template<>
        struct ast_iterator<std::vector<char>, void> {
            using node_type = std::vector<char>;

            template<class L>
            void operator()(const node_type& vec, L& lambda) const {
                lambda(vec);
            }
        };

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
        template<class CTE>
        struct ast_iterator<CTE, match_specialization_of<CTE, common_table_expression>> {
            using node_type = CTE;

            template<class L>
            void operator()(const node_type& c, L& lambda) const {
                iterate_ast(c.subselect, lambda);
            }
        };

        template<class With>
        struct ast_iterator<With, match_specialization_of<With, with_t>> {
            using node_type = With;

            template<class L>
            void operator()(const node_type& c, L& lambda) const {
                iterate_ast(c.cte, lambda);
                iterate_ast(c.expression, lambda);
            }
        };
#endif

        template<class T>
        struct ast_iterator<T, match_if<is_compound_operator, T>> {
            using node_type = T;

            template<class L>
            void operator()(const node_type& c, L& lambda) const {
                iterate_ast(c.compound, lambda);
            }
        };

        template<class T>
        struct ast_iterator<into_t<T>, void> {
            using node_type = into_t<T>;

            template<class L>
            void operator()(const node_type& /*node*/, L& /*lambda*/) const {
                //..
            }
        };

        template<class... Args>
        struct ast_iterator<insert_raw_t<Args...>, void> {
            using node_type = insert_raw_t<Args...>;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_ast(node.args, lambda);
            }
        };

        template<class... Args>
        struct ast_iterator<replace_raw_t<Args...>, void> {
            using node_type = replace_raw_t<Args...>;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_ast(node.args, lambda);
            }
        };

        template<class T, class... Args>
        struct ast_iterator<select_t<T, Args...>, void> {
            using node_type = select_t<T, Args...>;

            template<class L>
            void operator()(const node_type& sel, L& lambda) const {
                iterate_ast(sel.col, lambda);
                iterate_ast(sel.conditions, lambda);
            }
        };

        template<class T, class R, class... Args>
        struct ast_iterator<get_all_t<T, R, Args...>, void> {
            using node_type = get_all_t<T, R, Args...>;

            template<class L>
            void operator()(const node_type& get, L& lambda) const {
                iterate_ast(get.conditions, lambda);
            }
        };

        template<class T, class... Args>
        struct ast_iterator<get_all_pointer_t<T, Args...>, void> {
            using node_type = get_all_pointer_t<T, Args...>;

            template<class L>
            void operator()(const node_type& get, L& lambda) const {
                iterate_ast(get.conditions, lambda);
            }
        };

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
        template<class T, class... Args>
        struct ast_iterator<get_all_optional_t<T, Args...>, void> {
            using node_type = get_all_optional_t<T, Args...>;

            template<class L>
            void operator()(const node_type& get, L& lambda) const {
                iterate_ast(get.conditions, lambda);
            }
        };
#endif  // SQLITE_ORM_OPTIONAL_SUPPORTED

        template<class S, class... Wargs>
        struct ast_iterator<update_all_t<S, Wargs...>, void> {
            using node_type = update_all_t<S, Wargs...>;

            template<class L>
            void operator()(const node_type& u, L& lambda) const {
                iterate_ast(u.set, lambda);
                iterate_ast(u.conditions, lambda);
            }
        };

        template<class T, class... Args>
        struct ast_iterator<remove_all_t<T, Args...>, void> {
            using node_type = remove_all_t<T, Args...>;

            template<class L>
            void operator()(const node_type& r, L& lambda) const {
                iterate_ast(r.conditions, lambda);
            }
        };

        template<class... Args>
        struct ast_iterator<set_t<Args...>, void> {
            using node_type = set_t<Args...>;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_ast(node.assigns, lambda);
            }
        };

        template<class S>
        struct ast_iterator<dynamic_set_t<S>, void> {
            using node_type = dynamic_set_t<S>;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_ast(node.entries, lambda);
            }
        };

        template<class... Args>
        struct ast_iterator<std::tuple<Args...>, void> {
            using node_type = std::tuple<Args...>;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_tuple(node, [&lambda](auto& v) {
                    iterate_ast(v, lambda);
                });
            }
        };

        template<class T, class... Args>
        struct ast_iterator<group_by_with_having<T, Args...>, void> {
            using node_type = group_by_with_having<T, Args...>;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_ast(node.args, lambda);
                iterate_ast(node.expression, lambda);
            }
        };

        template<class T, class E>
        struct ast_iterator<cast_t<T, E>, void> {
            using node_type = cast_t<T, E>;

            template<class L>
            void operator()(const node_type& c, L& lambda) const {
                iterate_ast(c.expression, lambda);
            }
        };

        template<class T>
        struct ast_iterator<exists_t<T>, void> {
            using node_type = exists_t<T>;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_ast(node.expression, lambda);
            }
        };

        template<class A, class T, class E>
        struct ast_iterator<like_t<A, T, E>, void> {
            using node_type = like_t<A, T, E>;

            template<class L>
            void operator()(const node_type& lk, L& lambda) const {
                iterate_ast(lk.arg, lambda);
                iterate_ast(lk.pattern, lambda);
                lk.arg3.apply([&lambda](auto& value) {
                    iterate_ast(value, lambda);
                });
            }
        };

        template<class A, class T>
        struct ast_iterator<glob_t<A, T>, void> {
            using node_type = glob_t<A, T>;

            template<class L>
            void operator()(const node_type& lk, L& lambda) const {
                iterate_ast(lk.arg, lambda);
                iterate_ast(lk.pattern, lambda);
            }
        };

        template<class A, class T>
        struct ast_iterator<between_t<A, T>, void> {
            using node_type = between_t<A, T>;

            template<class L>
            void operator()(const node_type& b, L& lambda) const {
                iterate_ast(b.expr, lambda);
                iterate_ast(b.b1, lambda);
                iterate_ast(b.b2, lambda);
            }
        };

        template<class T>
        struct ast_iterator<named_collate<T>, void> {
            using node_type = named_collate<T>;

            template<class L>
            void operator()(const node_type& col, L& lambda) const {
                iterate_ast(col.expr, lambda);
            }
        };

        template<class C>
        struct ast_iterator<negated_condition_t<C>, void> {
            using node_type = negated_condition_t<C>;

            template<class L>
            void operator()(const node_type& neg, L& lambda) const {
                iterate_ast(neg.c, lambda);
            }
        };

        template<class T>
        struct ast_iterator<is_null_t<T>, void> {
            using node_type = is_null_t<T>;

            template<class L>
            void operator()(const node_type& i, L& lambda) const {
                iterate_ast(i.t, lambda);
            }
        };

        template<class T>
        struct ast_iterator<is_not_null_t<T>, void> {
            using node_type = is_not_null_t<T>;

            template<class L>
            void operator()(const node_type& i, L& lambda) const {
                iterate_ast(i.t, lambda);
            }
        };

        template<class F, class... CallArgs>
        struct ast_iterator<function_call<F, CallArgs...>, void> {
            using node_type = function_call<F, CallArgs...>;

            template<class L>
            void operator()(const node_type& f, L& lambda) const {
                iterate_ast(f.callArgs, lambda);
            }
        };

        template<class R, class S, class... Args>
        struct ast_iterator<built_in_function_t<R, S, Args...>, void> {
            using node_type = built_in_function_t<R, S, Args...>;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_ast(node.args, lambda);
            }
        };

        template<class R, class S, class... Args>
        struct ast_iterator<built_in_aggregate_function_t<R, S, Args...>, void> {
            using node_type = built_in_aggregate_function_t<R, S, Args...>;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_ast(node.args, lambda);
            }
        };

        template<class F, class W>
        struct ast_iterator<filtered_aggregate_function<F, W>, void> {
            using node_type = filtered_aggregate_function<F, W>;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_ast(node.function, lambda);
                iterate_ast(node.where, lambda);
            }
        };

        template<class Join>
        struct ast_iterator<Join, match_if<is_constrained_join, Join>> {
            using node_type = Join;

            template<class L>
            void operator()(const node_type& join, L& lambda) const {
                iterate_ast(join.constraint, lambda);
            }
        };

        template<class T>
        struct ast_iterator<on_t<T>, void> {
            using node_type = on_t<T>;

            template<class L>
            void operator()(const node_type& on, L& lambda) const {
                iterate_ast(on.arg, lambda);
            }
        };

        // note: not strictly necessary as there's no binding support for USING;
        // we provide it nevertheless, in line with on_t.
        template<class T>
        struct ast_iterator<T, std::enable_if_t<polyfill::is_specialization_of<T, using_t>::value>> {
            using node_type = T;

            template<class L>
            void operator()(const node_type& o, L& lambda) const {
                iterate_ast(o.column, lambda);
            }
        };

        template<class R, class T, class E, class... Args>
        struct ast_iterator<simple_case_t<R, T, E, Args...>, void> {
            using node_type = simple_case_t<R, T, E, Args...>;

            template<class L>
            void operator()(const node_type& c, L& lambda) const {
                c.case_expression.apply([&lambda](auto& c_) {
                    iterate_ast(c_, lambda);
                });
                iterate_tuple(c.args, [&lambda](auto& pair) {
                    iterate_ast(pair.first, lambda);
                    iterate_ast(pair.second, lambda);
                });
                c.else_expression.apply([&lambda](auto& el) {
                    iterate_ast(el, lambda);
                });
            }
        };

        template<class T, class E>
        struct ast_iterator<as_t<T, E>, void> {
            using node_type = as_t<T, E>;

            template<class L>
            void operator()(const node_type& a, L& lambda) const {
                iterate_ast(a.expression, lambda);
            }
        };

        template<class T, bool OI>
        struct ast_iterator<limit_t<T, false, OI, void>, void> {
            using node_type = limit_t<T, false, OI, void>;

            template<class L>
            void operator()(const node_type& a, L& lambda) const {
                iterate_ast(a.lim, lambda);
            }
        };

        template<class T, class O>
        struct ast_iterator<limit_t<T, true, false, O>, void> {
            using node_type = limit_t<T, true, false, O>;

            template<class L>
            void operator()(const node_type& a, L& lambda) const {
                iterate_ast(a.lim, lambda);
                a.off.apply([&lambda](auto& value) {
                    iterate_ast(value, lambda);
                });
            }
        };

        template<class T, class O>
        struct ast_iterator<limit_t<T, true, true, O>, void> {
            using node_type = limit_t<T, true, true, O>;

            template<class L>
            void operator()(const node_type& a, L& lambda) const {
                a.off.apply([&lambda](auto& value) {
                    iterate_ast(value, lambda);
                });
                iterate_ast(a.lim, lambda);
            }
        };

        template<class T>
        struct ast_iterator<distinct_t<T>, void> {
            using node_type = distinct_t<T>;

            template<class L>
            void operator()(const node_type& a, L& lambda) const {
                iterate_ast(a.value, lambda);
            }
        };

        template<class T>
        struct ast_iterator<all_t<T>, void> {
            using node_type = all_t<T>;

            template<class L>
            void operator()(const node_type& a, L& lambda) const {
                iterate_ast(a.value, lambda);
            }
        };

        template<class T>
        struct ast_iterator<bitwise_not_t<T>, void> {
            using node_type = bitwise_not_t<T>;

            template<class L>
            void operator()(const node_type& a, L& lambda) const {
                iterate_ast(a.argument, lambda);
            }
        };

        template<class... Args>
        struct ast_iterator<values_t<Args...>, void> {
            using node_type = values_t<Args...>;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_ast(node.tuple, lambda);
            }
        };

        template<class T>
        struct ast_iterator<dynamic_values_t<T>, void> {
            using node_type = dynamic_values_t<T>;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_ast(node.vector, lambda);
            }
        };

        /**
         *  Column alias or literal: skipped
         */
        template<class T>
        struct ast_iterator<T,
                            std::enable_if_t<polyfill::disjunction<polyfill::is_specialization_of<T, alias_holder>,
                                                                   polyfill::is_specialization_of<T, literal_holder>,
                                                                   is_column_alias<T>>::value>> {
            using node_type = T;

            template<class L>
            void operator()(const node_type& /*node*/, L& /*lambda*/) const {}
        };

        template<class E>
        struct ast_iterator<order_by_t<E>, void> {
            using node_type = order_by_t<E>;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_ast(node.expression, lambda);
            }
        };

        template<class T>
        struct ast_iterator<collate_t<T>, void> {
            using node_type = collate_t<T>;

            template<class L>
            void operator()(const node_type& node, L& lambda) const {
                iterate_ast(node.expr, lambda);
            }
        };

    }
}

// #include "prepared_statement.h"

// #include "connection_holder.h"

// #include "util.h"

namespace sqlite_orm {

    namespace internal {

        /**
         * A C++ view-like class which is returned
         * by `storage_t::iterate()` function. This class contains STL functions:
         *  -   size_t size()
         *  -   bool empty()
         *  -   iterator end()
         *  -   iterator begin()
         *  All these functions are not right const cause all of them may open SQLite connections.
         *  
         *  `mapped_view` is also a 'borrowed range',
         *  meaning that iterators obtained from it are not tied to the lifetime of the view instance.
         */
        template<class T, class S, class... Args>
        struct mapped_view {
            using mapped_type = T;
            using storage_type = S;
            using db_objects_type = typename S::db_objects_type;

            storage_type& storage;
            connection_ref connection;
            get_all_t<T, void, Args...> expression;

            mapped_view(storage_type& storage, connection_ref conn, Args&&... args) :
                storage(storage), connection(std::move(conn)), expression{std::forward<Args>(args)...} {}

            size_t size() const {
                return this->storage.template count<T>();
            }

            bool empty() const {
                return !this->size();
            }

            mapped_iterator<T, db_objects_type> begin() {
                using context_t = serializer_context<db_objects_type>;
                auto& dbObjects = obtain_db_objects(this->storage);
                context_t context{dbObjects};
                context.skip_table_name = false;
                context.replace_bindable_with_question = true;

                statement_finalizer stmt{prepare_stmt(this->connection.get(), serialize(this->expression, context))};
                iterate_ast(this->expression.conditions, conditional_binder{stmt.get()});
                return {dbObjects, std::move(stmt)};
            }

            mapped_iterator<T, db_objects_type> end() {
                return {};
            }
        };
    }
}

#ifdef SQLITE_ORM_CPP20_RANGES_SUPPORTED
template<class T, class S, class... Args>
inline constexpr bool std::ranges::enable_borrowed_range<sqlite_orm::internal::mapped_view<T, S, Args...>> = true;
#endif

// #include "result_set_view.h"

#include "sqlite3.h"
#include <utility>  //  std::move, std::remove_cvref
#include <functional>  //  std::reference_wrapper
#if defined(SQLITE_ORM_SENTINEL_BASED_FOR_SUPPORTED) && defined(SQLITE_ORM_DEFAULT_COMPARISONS_SUPPORTED) &&           \
    defined(SQLITE_ORM_CPP20_RANGES_SUPPORTED)
#include <ranges>  //  std::ranges::view_interface
#endif

// #include "functional/cxx_type_traits_polyfill.h"

// #include "row_extractor.h"

// #include "result_set_iterator.h"

#include "sqlite3.h"
#include <utility>  //  std::move
#include <iterator>  //  std::input_iterator_tag, std::default_sentinel_t
#include <functional>  //  std::reference_wrapper

// #include "functional/cxx_universal.h"
//  ::ptrdiff_t
// #include "statement_finalizer.h"

// #include "row_extractor.h"

// #include "column_result_proxy.h"

// #include "util.h"

#if defined(SQLITE_ORM_SENTINEL_BASED_FOR_SUPPORTED) && defined(SQLITE_ORM_DEFAULT_COMPARISONS_SUPPORTED)
namespace sqlite_orm::internal {

    template<class ColResult, class DBOs>
    class result_set_iterator;

#ifdef SQLITE_ORM_STL_HAS_DEFAULT_SENTINEL
    using result_set_sentinel_t = std::default_sentinel_t;
#else
    // sentinel
    template<>
    class result_set_iterator<void, void> {};

    using result_set_sentinel_t = result_set_iterator<void, void>;
#endif

    /*  
     *  Input iterator over a result set for a select statement.
     */
    template<class ColResult, class DBOs>
    class result_set_iterator {
      public:
        using db_objects_type = DBOs;

#ifdef SQLITE_ORM_CPP20_CONCEPTS_SUPPORTED
        using iterator_concept = std::input_iterator_tag;
#else
        using iterator_category = std::input_iterator_tag;
#endif
        using difference_type = ptrdiff_t;
        using value_type = column_result_proxy_t<ColResult>;

      public:
        result_set_iterator(const db_objects_type& dbObjects, statement_finalizer stmt) :
            db_objects{dbObjects}, stmt{std::move(stmt)} {
            this->step();
        }
        result_set_iterator(result_set_iterator&&) = default;
        result_set_iterator& operator=(result_set_iterator&&) = default;
        result_set_iterator(const result_set_iterator&) = delete;
        result_set_iterator& operator=(const result_set_iterator&) = delete;

        /** @pre `*this != std::default_sentinel` */
        value_type operator*() const {
            return this->extract();
        }

        result_set_iterator& operator++() {
            this->step();
            return *this;
        }

        void operator++(int) {
            ++*this;
        }

        friend bool operator==(const result_set_iterator& it, const result_set_sentinel_t&) noexcept {
            return sqlite3_data_count(it.stmt.get()) == 0;
        }

      private:
        void step() {
            perform_step(this->stmt.get(), [](sqlite3_stmt*) {});
        }

        value_type extract() const {
            const auto rowExtractor = make_row_extractor<ColResult>(this->db_objects.get());
            return rowExtractor.extract(this->stmt.get(), 0);
        }

      private:
        std::reference_wrapper<const db_objects_type> db_objects;
        statement_finalizer stmt;
    };
}
#endif

// #include "ast_iterator.h"

// #include "connection_holder.h"

// #include "util.h"

// #include "type_traits.h"

// #include "storage_lookup.h"

#if defined(SQLITE_ORM_SENTINEL_BASED_FOR_SUPPORTED) && defined(SQLITE_ORM_DEFAULT_COMPARISONS_SUPPORTED)
namespace sqlite_orm::internal {
    /*  
     *  A C++ view over a result set of a select statement, returned by `storage_t::iterate()`.
     *  
     *  `result_set_view` is also a 'borrowed range',
     *  meaning that iterators obtained from it are not tied to the lifetime of the view instance.
     */
    template<class Select, class DBOs>
    struct result_set_view
#ifdef SQLITE_ORM_CPP20_RANGES_SUPPORTED
        : std::ranges::view_interface<result_set_view<Select, DBOs>>
#endif
    {
        using db_objects_type = DBOs;
        using expression_type = Select;

        result_set_view(const db_objects_type& dbObjects, connection_ref conn, Select expression) :
            db_objects{dbObjects}, connection{std::move(conn)}, expression{std::move(expression)} {}

        result_set_view(result_set_view&&) = default;
        result_set_view& operator=(result_set_view&&) = default;
        result_set_view(const result_set_view&) = default;
        result_set_view& operator=(const result_set_view&) = default;

        auto begin() {
            const auto& exprDBOs = db_objects_for_expression(this->db_objects.get(), this->expression);
            using ExprDBOs = std::remove_cvref_t<decltype(exprDBOs)>;
            // note: Select can be `select_t` or `with_t`
            using select_type = polyfill::detected_or_t<expression_type, expression_type_t, expression_type>;
            using column_result_type = column_result_of_t<ExprDBOs, select_type>;
            using context_t = serializer_context<ExprDBOs>;
            context_t context{exprDBOs};
            context.skip_table_name = false;
            context.replace_bindable_with_question = true;

            statement_finalizer stmt{prepare_stmt(this->connection.get(), serialize(this->expression, context))};
            iterate_ast(this->expression, conditional_binder{stmt.get()});

            // note: it is enough to only use the 'expression DBOs' at compile-time to determine the column results;
            // because we cannot select objects/structs from a CTE, passing the permanently defined DBOs are enough.
            using iterator_type = result_set_iterator<column_result_type, db_objects_type>;
            return iterator_type{this->db_objects, std::move(stmt)};
        }

        result_set_sentinel_t end() {
            return {};
        }

      private:
        std::reference_wrapper<const db_objects_type> db_objects;
        connection_ref connection;
        expression_type expression;
    };
}

#ifdef SQLITE_ORM_CPP20_RANGES_SUPPORTED
template<class Select, class DBOs>
inline constexpr bool std::ranges::enable_borrowed_range<sqlite_orm::internal::result_set_view<Select, DBOs>> = true;
#endif
#endif

// #include "ast_iterator.h"

// #include "storage_base.h"

#include "sqlite3.h"
#include <memory>  //  std::allocator
#include <functional>  //  std::function, std::bind, std::bind_front
#include <string>  //  std::string
#include <sstream>  //  std::stringstream
#include <utility>  //  std::move
#include <system_error>  //  std::system_error
#include <vector>  //  std::vector
#include <list>  //  std::list
#include <memory>  //  std::make_unique, std::unique_ptr
#include <map>  //  std::map
#include <type_traits>  //  std::is_same
#include <algorithm>  //  std::find_if, std::ranges::find

// #include "functional/cxx_universal.h"
//  ::size_t
// #include "functional/cxx_tuple_polyfill.h"

#include <tuple>  //  std::apply; std::tuple_size
#if __cpp_lib_apply < 201603L
#include <utility>  //  std::forward, std::index_sequence, std::make_index_sequence
#endif

// #include "../functional/cxx_universal.h"
//  ::size_t
// #include "../functional/cxx_functional_polyfill.h"
//  std::invoke

namespace sqlite_orm {
    namespace internal {
        namespace polyfill {
#if __cpp_lib_apply >= 201603L
            using std::apply;
#else
            template<class Callable, class Tpl, size_t... Idx>
            decltype(auto) apply(Callable&& callable, Tpl&& tpl, std::index_sequence<Idx...>) {
                return polyfill::invoke(std::forward<Callable>(callable), std::get<Idx>(std::forward<Tpl>(tpl))...);
            }

            template<class Callable, class Tpl>
            decltype(auto) apply(Callable&& callable, Tpl&& tpl) {
                constexpr size_t size = std::tuple_size<std::remove_reference_t<Tpl>>::value;
                return apply(std::forward<Callable>(callable),
                             std::forward<Tpl>(tpl),
                             std::make_index_sequence<size>{});
            }
#endif
        }
    }

    namespace polyfill = internal::polyfill;
}
//  std::apply
// #include "tuple_helper/tuple_iteration.h"

// #include "pragma.h"

#include "sqlite3.h"
#include <string>  //  std::string
#include <functional>  //  std::function
#include <memory>  // std::shared_ptr
#include <vector>  //  std::vector
#include <sstream>

// #include "error_code.h"

// #include "row_extractor.h"

// #include "journal_mode.h"

// #include "connection_holder.h"

// #include "util.h"

// #include "serializing_util.h"

#include <type_traits>  //  std::index_sequence
#include <tuple>
#include <array>
#include <string>
#include <ostream>
#include <utility>  //  std::exchange, std::tuple_size

// #include "functional/cxx_universal.h"
//  ::size_t
// #include "functional/cxx_type_traits_polyfill.h"

// #include "tuple_helper/tuple_iteration.h"

// #include "error_code.h"

// #include "serializer_context.h"

// #include "serialize_result_type.h"

// #include "util.h"

namespace sqlite_orm {
    namespace internal {
        template<class O>
        struct order_by_t;

        template<class T, class C>
        auto serialize(const T& t, const C& context);

        template<class T, class Ctx>
        std::string serialize_order_by(const T&, const Ctx&);

        inline void stream_sql_escaped(std::ostream& os, serialize_arg_type str, char char2Escape) {
            for(size_t offset = 0, next; true; offset = next + 1) {
                next = str.find(char2Escape, offset);

                if(next == str.npos) SQLITE_ORM_CPP_LIKELY {
                    os.write(str.data() + offset, str.size() - offset);
                    break;
                }

                os.write(str.data() + offset, next - offset + 1);
                os.write(&char2Escape, 1);
            }
        }

        inline void stream_identifier(std::ostream& ss,
                                      serialize_arg_type qualifier,
                                      serialize_arg_type identifier,
                                      serialize_arg_type alias) {
            constexpr char quoteChar = '"';
            constexpr char qualified[] = {quoteChar, '.', '\0'};
            constexpr char aliased[] = {' ', quoteChar, '\0'};

            // note: In practice, escaping double quotes in identifiers is arguably overkill,
            // but since the SQLite grammar allows it, it's better to be safe than sorry.

            if(!qualifier.empty()) {
                ss << quoteChar;
                stream_sql_escaped(ss, qualifier, quoteChar);
                ss << qualified;
            }
            {
                ss << quoteChar;
                stream_sql_escaped(ss, identifier, quoteChar);
                ss << quoteChar;
            }
            if(!alias.empty()) {
                ss << aliased;
                stream_sql_escaped(ss, alias, quoteChar);
                ss << quoteChar;
            }
        }

        inline void stream_identifier(std::ostream& ss, const std::string& identifier, const std::string& alias) {
            return stream_identifier(ss, "", identifier, alias);
        }

        inline void stream_identifier(std::ostream& ss, const std::string& identifier) {
            return stream_identifier(ss, "", identifier, "");
        }

        template<typename Tpl, size_t... Is>
        void stream_identifier(std::ostream& ss, const Tpl& tpl, std::index_sequence<Is...>) {
            static_assert(sizeof...(Is) > 0 && sizeof...(Is) <= 3, "");
            return stream_identifier(ss, std::get<Is>(tpl)...);
        }

        template<typename Tpl,
                 std::enable_if_t<polyfill::is_detected<type_t, std::tuple_size<Tpl>>::value, bool> = true>
        void stream_identifier(std::ostream& ss, const Tpl& tpl) {
            return stream_identifier(ss, tpl, std::make_index_sequence<std::tuple_size<Tpl>::value>{});
        }

        enum class stream_as {
            conditions_tuple,
            actions_tuple,
            expressions_tuple,
            dynamic_expressions,
            compound_expressions,
            serialized,
            identifier,
            identifiers,
            values_placeholders,
            table_columns,
            non_generated_columns,
            field_values_excluding,
            mapped_columns_expressions,
            column_constraints,
            constraints_tuple,
        };

        template<stream_as mode>
        struct streaming {
            template<class... Ts>
            auto operator()(const Ts&... ts) const {
                return std::forward_as_tuple(*this, ts...);
            }

            template<size_t... Idx>
            constexpr std::index_sequence<1u + Idx...> offset_index(std::index_sequence<Idx...>) const {
                return {};
            }
        };
        constexpr streaming<stream_as::conditions_tuple> streaming_conditions_tuple{};
        constexpr streaming<stream_as::actions_tuple> streaming_actions_tuple{};
        constexpr streaming<stream_as::expressions_tuple> streaming_expressions_tuple{};
        constexpr streaming<stream_as::dynamic_expressions> streaming_dynamic_expressions{};
        constexpr streaming<stream_as::compound_expressions> streaming_compound_expressions{};
        constexpr streaming<stream_as::serialized> streaming_serialized{};
        constexpr streaming<stream_as::identifier> streaming_identifier{};
        constexpr streaming<stream_as::identifiers> streaming_identifiers{};
        constexpr streaming<stream_as::values_placeholders> streaming_values_placeholders{};
        constexpr streaming<stream_as::table_columns> streaming_table_column_names{};
        constexpr streaming<stream_as::non_generated_columns> streaming_non_generated_column_names{};
        constexpr streaming<stream_as::field_values_excluding> streaming_field_values_excluding{};
        constexpr streaming<stream_as::mapped_columns_expressions> streaming_mapped_columns_expressions{};
        constexpr streaming<stream_as::constraints_tuple> streaming_constraints_tuple{};
        constexpr streaming<stream_as::column_constraints> streaming_column_constraints{};

        // serialize and stream a tuple of condition expressions;
        // space + space-separated
        template<class T, class Ctx>
        std::ostream& operator<<(std::ostream& ss,
                                 std::tuple<const streaming<stream_as::conditions_tuple>&, T, Ctx> tpl) {
            const auto& conditions = std::get<1>(tpl);
            auto& context = std::get<2>(tpl);

            iterate_tuple(conditions, [&ss, &context](auto& c) {
                ss << " " << serialize(c, context);
            });
            return ss;
        }

        // serialize and stream a tuple of action expressions;
        // space-separated
        template<class T, class Ctx>
        std::ostream& operator<<(std::ostream& ss, std::tuple<const streaming<stream_as::actions_tuple>&, T, Ctx> tpl) {
            const auto& actions = std::get<1>(tpl);
            auto& context = std::get<2>(tpl);

            iterate_tuple(actions, [&ss, &context, first = true](auto& action) mutable {
                constexpr std::array<const char*, 2> sep = {" ", ""};
                ss << sep[std::exchange(first, false)] << serialize(action, context);
            });
            return ss;
        }

        // serialize and stream a tuple of expressions;
        // comma-separated
        template<class T, class Ctx>
        std::ostream& operator<<(std::ostream& ss,
                                 std::tuple<const streaming<stream_as::expressions_tuple>&, T, Ctx> tpl) {
            const auto& args = std::get<1>(tpl);
            auto& context = std::get<2>(tpl);

            iterate_tuple(args, [&ss, &context, first = true](auto& arg) mutable {
                constexpr std::array<const char*, 2> sep = {", ", ""};
                ss << sep[std::exchange(first, false)] << serialize(arg, context);
            });
            return ss;
        }

        // serialize and stream expressions of a compound statement;
        // separated by compound operator
        template<class T, class Ctx>
        std::ostream&
        operator<<(std::ostream& ss,
                   std::tuple<const streaming<stream_as::compound_expressions>&, T, const std::string&, Ctx> tpl) {
            const auto& args = std::get<1>(tpl);
            const std::string& opString = std::get<2>(tpl);
            auto& context = std::get<3>(tpl);

            iterate_tuple(args, [&ss, &opString, &context, first = true](auto& arg) mutable {
                if(!std::exchange(first, false)) {
                    ss << ' ' << opString << ' ';
                }
                ss << serialize(arg, context);
            });
            return ss;
        }

        // serialize and stream multi_order_by arguments;
        // comma-separated
        template<class... Os, class Ctx>
        std::ostream& operator<<(
            std::ostream& ss,
            std::tuple<const streaming<stream_as::expressions_tuple>&, const std::tuple<order_by_t<Os>...>&, Ctx> tpl) {
            const auto& args = std::get<1>(tpl);
            auto& context = std::get<2>(tpl);

            iterate_tuple(args, [&ss, &context, first = true](auto& arg) mutable {
                constexpr std::array<const char*, 2> sep = {", ", ""};
                ss << sep[std::exchange(first, false)] << serialize_order_by(arg, context);
            });
            return ss;
        }

        // serialize and stream a vector or any other STL container of expressions;
        // comma-separated
        template<class C, class Ctx>
        std::ostream& operator<<(std::ostream& ss,
                                 std::tuple<const streaming<stream_as::dynamic_expressions>&, C, Ctx> tpl) {
            const auto& args = std::get<1>(tpl);
            auto& context = std::get<2>(tpl);

            constexpr std::array<const char*, 2> sep = {", ", ""};
            bool first = true;
            for(auto& argument: args) {
                ss << sep[std::exchange(first, false)] << serialize(argument, context);
            }
            return ss;
        }

        // stream a vector of already serialized strings;
        // comma-separated
        template<class C>
        std::ostream& operator<<(std::ostream& ss, std::tuple<const streaming<stream_as::serialized>&, C> tpl) {
            const auto& strings = std::get<1>(tpl);

            constexpr std::array<const char*, 2> sep = {", ", ""};
            for(size_t i = 0, first = true; i < strings.size(); ++i) {
                ss << sep[std::exchange(first, false)] << strings[i];
            }
            return ss;
        }

        // stream an identifier described by a variadic string pack, which is one of:
        // 1. identifier
        // 2. identifier, alias
        // 3. qualifier, identifier, alias
        template<class... Strings>
        std::ostream& operator<<(std::ostream& ss,
                                 std::tuple<const streaming<stream_as::identifier>&, Strings...> tpl) {
            stream_identifier(ss, tpl, streaming_identifier.offset_index(std::index_sequence_for<Strings...>{}));
            return ss;
        }

        // stream a container of identifiers described by a string or a tuple, which is one of:
        // 1. identifier
        // 1. tuple(identifier)
        // 2. tuple(identifier, alias), pair(identifier, alias)
        // 3. tuple(qualifier, identifier, alias)
        //
        // comma-separated
        template<class C>
        std::ostream& operator<<(std::ostream& ss, std::tuple<const streaming<stream_as::identifiers>&, C> tpl) {
            const auto& identifiers = std::get<1>(tpl);

            constexpr std::array<const char*, 2> sep = {", ", ""};
            bool first = true;
            for(auto& identifier: identifiers) {
                ss << sep[std::exchange(first, false)];
                stream_identifier(ss, identifier);
            }
            return ss;
        }

        // stream placeholders as part of a values clause
        template<class... Ts>
        std::ostream& operator<<(std::ostream& ss,
                                 std::tuple<const streaming<stream_as::values_placeholders>&, Ts...> tpl) {
            const size_t& columnsCount = std::get<1>(tpl);
            const ptrdiff_t& valuesCount = std::get<2>(tpl);

            if(!valuesCount || !columnsCount) {
                return ss;
            }

            std::string result;
            result.reserve((1 + (columnsCount * 1) + (columnsCount * 2 - 2) + 1) * valuesCount + (valuesCount * 2 - 2));

            constexpr std::array<const char*, 2> sep = {", ", ""};
            for(ptrdiff_t i = 0, first = true; i < valuesCount; ++i) {
                result += sep[std::exchange(first, false)];
                result += "(";
                for(size_t i = 0, first = true; i < columnsCount; ++i) {
                    result += sep[std::exchange(first, false)];
                    result += "?";
                }
                result += ")";
            }
            ss << result;
            return ss;
        }

        // stream a table's column identifiers, possibly qualified;
        // comma-separated
        template<class Table>
        std::ostream&
        operator<<(std::ostream& ss,
                   std::tuple<const streaming<stream_as::table_columns>&, Table, const std::string&> tpl) {
            const auto& table = std::get<1>(tpl);
            const std::string& qualifier = std::get<2>(tpl);

            table.for_each_column([&ss, &qualifier, first = true](const column_identifier& column) mutable {
                constexpr std::array<const char*, 2> sep = {", ", ""};
                ss << sep[std::exchange(first, false)];
                stream_identifier(ss, qualifier, column.name, std::string{});
            });
            return ss;
        }

        // stream a table's non-generated column identifiers, unqualified;
        // comma-separated
        template<class Table>
        std::ostream& operator<<(std::ostream& ss,
                                 std::tuple<const streaming<stream_as::non_generated_columns>&, Table> tpl) {
            const auto& table = std::get<1>(tpl);

            table.template for_each_column_excluding<is_generated_always>(
                [&ss, first = true](const column_identifier& column) mutable {
                    constexpr std::array<const char*, 2> sep = {", ", ""};
                    ss << sep[std::exchange(first, false)];
                    stream_identifier(ss, column.name);
                });
            return ss;
        }

        // stream a table's non-generated column identifiers, unqualified;
        // comma-separated
        template<class PredFnCls, class L, class Ctx, class Obj>
        std::ostream&
        operator<<(std::ostream& ss,
                   std::tuple<const streaming<stream_as::field_values_excluding>&, PredFnCls, L, Ctx, Obj> tpl) {
            using check_if_excluded = polyfill::remove_cvref_t<std::tuple_element_t<1, decltype(tpl)>>;
            auto& excluded = std::get<2>(tpl);
            auto& context = std::get<3>(tpl);
            auto& object = std::get<4>(tpl);
            using object_type = polyfill::remove_cvref_t<decltype(object)>;
            auto& table = pick_table<object_type>(context.db_objects);

            table.template for_each_column_excluding<check_if_excluded>(call_as_template_base<column_field>(
                [&ss, &excluded, &context, &object, first = true](auto& column) mutable {
                    if(excluded(column)) {
                        return;
                    }

                    constexpr std::array<const char*, 2> sep = {", ", ""};
                    ss << sep[std::exchange(first, false)]
                       << serialize(polyfill::invoke(column.member_pointer, object), context);
                }));
            return ss;
        }

        // stream a tuple of mapped columns (which are member pointers or column pointers);
        // comma-separated
        template<class T, class Ctx>
        std::ostream& operator<<(std::ostream& ss,
                                 std::tuple<const streaming<stream_as::mapped_columns_expressions>&, T, Ctx> tpl) {
            const auto& columns = std::get<1>(tpl);
            auto& context = std::get<2>(tpl);

            iterate_tuple(columns, [&ss, &context, first = true](auto& colRef) mutable {
                const std::string* columnName = find_column_name(context.db_objects, colRef);
                if(!columnName) {
                    throw std::system_error{orm_error_code::column_not_found};
                }

                constexpr std::array<const char*, 2> sep = {", ", ""};
                ss << sep[std::exchange(first, false)];
                stream_identifier(ss, *columnName);
            });
            return ss;
        }

        // serialize and stream a tuple of conditions or hints;
        // space + space-separated
        template<class T, class Ctx>
        std::ostream& operator<<(std::ostream& ss,
                                 std::tuple<const streaming<stream_as::constraints_tuple>&, T, Ctx> tpl) {
            const auto& constraints = get<1>(tpl);
            auto& context = get<2>(tpl);

            iterate_tuple(constraints, [&ss, &context](auto& constraint) mutable {
                ss << ' ' << serialize(constraint, context);
            });
            return ss;
        }

        // serialize and stream a tuple of column constraints;
        // space + space-separated
        template<class... Op, class Ctx>
        std::ostream& operator<<(std::ostream& ss,
                                 std::tuple<const streaming<stream_as::column_constraints>&,
                                            const column_constraints<Op...>&,
                                            const bool&,
                                            Ctx> tpl) {
            const auto& column = std::get<1>(tpl);
            const bool& isNotNull = std::get<2>(tpl);
            auto& context = std::get<3>(tpl);

            using constraints_tuple = decltype(column.constraints);
            iterate_tuple(column.constraints, [&ss, &context](auto& constraint) {
                ss << ' ' << serialize(constraint, context);
            });
            // add implicit null constraint
            if(!context.fts5_columns) {
                constexpr bool hasExplicitNullableConstraint =
                    mpl::invoke_t<mpl::disjunction<check_if_has_type<null_t>, check_if_has_type<not_null_t>>,
                                  constraints_tuple>::value;
                if SQLITE_ORM_CONSTEXPR_IF(!hasExplicitNullableConstraint) {
                    if(isNotNull) {
                        ss << " NOT NULL";
                    } else {
                        ss << " NULL";
                    }
                }
            }

            return ss;
        }
    }
}

namespace sqlite_orm {

    namespace internal {
        struct storage_base;

        template<class T>
        int getPragmaCallback(void* data, int argc, char** argv, char** x) {
            return extract_single_value<T>(data, argc, argv, x);
        }

        template<>
        inline int getPragmaCallback<std::vector<std::string>>(void* data, int argc, char** argv, char**) {
            auto& res = *(std::vector<std::string>*)data;
            res.reserve(argc);
            const auto rowExtractor = column_text_extractor<std::string>();
            for(int i = 0; i < argc; ++i) {
                auto rowString = rowExtractor.extract(argv[i]);
                res.push_back(std::move(rowString));
            }
            return 0;
        }

        struct pragma_t {
            using get_connection_t = std::function<internal::connection_ref()>;

            pragma_t(get_connection_t get_connection_) : get_connection(std::move(get_connection_)) {}

            std::vector<std::string> module_list() {
                return this->get_pragma<std::vector<std::string>>("module_list");
            }

            bool recursive_triggers() {
                return bool(this->get_pragma<int>("recursive_triggers"));
            }

            void recursive_triggers(bool value) {
                this->set_pragma("recursive_triggers", int(value));
            }

            void busy_timeout(int value) {
                this->set_pragma("busy_timeout", value);
            }

            int busy_timeout() {
                return this->get_pragma<int>("busy_timeout");
            }

            sqlite_orm::journal_mode journal_mode() {
                return this->get_pragma<sqlite_orm::journal_mode>("journal_mode");
            }

            void journal_mode(sqlite_orm::journal_mode value) {
                this->_journal_mode = -1;
                this->set_pragma("journal_mode", value);
                this->_journal_mode = static_cast<decltype(this->_journal_mode)>(value);
            }

            /**
             *  https://www.sqlite.org/pragma.html#pragma_application_id
             */
            int application_id() {
                return this->get_pragma<int>("application_id");
            }

            /**
             *  https://www.sqlite.org/pragma.html#pragma_application_id
             */
            void application_id(int value) {
                this->set_pragma("application_id", value);
            }

            int synchronous() {
                return this->get_pragma<int>("synchronous");
            }

            void synchronous(int value) {
                this->_synchronous = -1;
                this->set_pragma("synchronous", value);
                this->_synchronous = value;
            }

            int user_version() {
                return this->get_pragma<int>("user_version");
            }

            void user_version(int value) {
                this->set_pragma("user_version", value);
            }

            int auto_vacuum() {
                return this->get_pragma<int>("auto_vacuum");
            }

            void auto_vacuum(int value) {
                this->set_pragma("auto_vacuum", value);
            }

            std::vector<std::string> integrity_check() {
                return this->get_pragma<std::vector<std::string>>("integrity_check");
            }

            template<class T>
            std::vector<std::string> integrity_check(T table_name) {
                std::ostringstream ss;
                ss << "integrity_check(" << table_name << ")" << std::flush;
                return this->get_pragma<std::vector<std::string>>(ss.str());
            }

            std::vector<std::string> integrity_check(int n) {
                std::ostringstream ss;
                ss << "integrity_check(" << n << ")" << std::flush;
                return this->get_pragma<std::vector<std::string>>(ss.str());
            }

            std::vector<std::string> quick_check() {
                return this->get_pragma<std::vector<std::string>>("quick_check");
            }

            // will include generated columns in response as opposed to table_info
            std::vector<sqlite_orm::table_xinfo> table_xinfo(const std::string& tableName) const {
                auto connection = this->get_connection();

                std::vector<sqlite_orm::table_xinfo> result;
                std::ostringstream ss;
                ss << "PRAGMA "
                      "table_xinfo("
                   << streaming_identifier(tableName) << ")" << std::flush;
                perform_exec(
                    connection.get(),
                    ss.str(),
                    [](void* data, int argc, char** argv, char**) -> int {
                        auto& res = *(std::vector<sqlite_orm::table_xinfo>*)data;
                        if(argc) {
                            auto index = 0;
                            auto cid = std::atoi(argv[index++]);
                            std::string name = argv[index++];
                            std::string type = argv[index++];
                            bool notnull = !!std::atoi(argv[index++]);
                            std::string dflt_value = argv[index] ? argv[index] : "";
                            ++index;
                            auto pk = std::atoi(argv[index++]);
                            auto hidden = std::atoi(argv[index++]);
                            res.emplace_back(cid,
                                             std::move(name),
                                             std::move(type),
                                             notnull,
                                             std::move(dflt_value),
                                             pk,
                                             hidden);
                        }
                        return 0;
                    },
                    &result);
                return result;
            }

            std::vector<sqlite_orm::table_info> table_info(const std::string& tableName) const {
                auto connection = this->get_connection();

                std::ostringstream ss;
                ss << "PRAGMA "
                      "table_info("
                   << streaming_identifier(tableName) << ")" << std::flush;
                std::vector<sqlite_orm::table_info> result;
                perform_exec(
                    connection.get(),
                    ss.str(),
                    [](void* data, int argc, char** argv, char**) -> int {
                        auto& res = *(std::vector<sqlite_orm::table_info>*)data;
                        if(argc) {
                            auto index = 0;
                            auto cid = std::atoi(argv[index++]);
                            std::string name = argv[index++];
                            std::string type = argv[index++];
                            bool notnull = !!std::atoi(argv[index++]);
                            std::string dflt_value = argv[index] ? argv[index] : "";
                            ++index;
                            auto pk = std::atoi(argv[index++]);
                            res.emplace_back(cid, std::move(name), std::move(type), notnull, std::move(dflt_value), pk);
                        }
                        return 0;
                    },
                    &result);
                return result;
            }

          private:
            friend struct storage_base;

            int _synchronous = -1;
            signed char _journal_mode = -1;  //  if != -1 stores static_cast<sqlite_orm::journal_mode>(journal_mode)
            get_connection_t get_connection;

            template<class T>
            T get_pragma(const std::string& name) {
                auto connection = this->get_connection();
                T result;
                perform_exec(connection.get(), "PRAGMA " + name, getPragmaCallback<T>, &result);
                return result;
            }

            /**
             *  Yevgeniy Zakharov: I wanted to refactor this function with statements and value bindings
             *  but it turns out that bindings in pragma statements are not supported.
             */
            template<class T>
            void set_pragma(const std::string& name, const T& value, sqlite3* db = nullptr) {
                auto con = this->get_connection();
                if(!db) {
                    db = con.get();
                }
                std::stringstream ss;
                ss << "PRAGMA " << name << " = " << value << std::flush;
                perform_void_exec(db, ss.str());
            }

            void set_pragma(const std::string& name, const sqlite_orm::journal_mode& value, sqlite3* db = nullptr) {
                auto con = this->get_connection();
                if(!db) {
                    db = con.get();
                }
                std::stringstream ss;
                ss << "PRAGMA " << name << " = " << to_string(value) << std::flush;
                perform_void_exec(db, ss.str());
            }
        };
    }
}

// #include "limit_accessor.h"

#include "sqlite3.h"
#include <map>  //  std::map
#include <functional>  //  std::function
#include <memory>  //  std::shared_ptr

// #include "connection_holder.h"

namespace sqlite_orm {

    namespace internal {

        struct limit_accessor {
            using get_connection_t = std::function<connection_ref()>;

            limit_accessor(get_connection_t get_connection_) : get_connection(std::move(get_connection_)) {}

            int length() {
                return this->get(SQLITE_LIMIT_LENGTH);
            }

            void length(int newValue) {
                this->set(SQLITE_LIMIT_LENGTH, newValue);
            }

            int sql_length() {
                return this->get(SQLITE_LIMIT_SQL_LENGTH);
            }

            void sql_length(int newValue) {
                this->set(SQLITE_LIMIT_SQL_LENGTH, newValue);
            }

            int column() {
                return this->get(SQLITE_LIMIT_COLUMN);
            }

            void column(int newValue) {
                this->set(SQLITE_LIMIT_COLUMN, newValue);
            }

            int expr_depth() {
                return this->get(SQLITE_LIMIT_EXPR_DEPTH);
            }

            void expr_depth(int newValue) {
                this->set(SQLITE_LIMIT_EXPR_DEPTH, newValue);
            }

            int compound_select() {
                return this->get(SQLITE_LIMIT_COMPOUND_SELECT);
            }

            void compound_select(int newValue) {
                this->set(SQLITE_LIMIT_COMPOUND_SELECT, newValue);
            }

            int vdbe_op() {
                return this->get(SQLITE_LIMIT_VDBE_OP);
            }

            void vdbe_op(int newValue) {
                this->set(SQLITE_LIMIT_VDBE_OP, newValue);
            }

            int function_arg() {
                return this->get(SQLITE_LIMIT_FUNCTION_ARG);
            }

            void function_arg(int newValue) {
                this->set(SQLITE_LIMIT_FUNCTION_ARG, newValue);
            }

            int attached() {
                return this->get(SQLITE_LIMIT_ATTACHED);
            }

            void attached(int newValue) {
                this->set(SQLITE_LIMIT_ATTACHED, newValue);
            }

            int like_pattern_length() {
                return this->get(SQLITE_LIMIT_LIKE_PATTERN_LENGTH);
            }

            void like_pattern_length(int newValue) {
                this->set(SQLITE_LIMIT_LIKE_PATTERN_LENGTH, newValue);
            }

            int variable_number() {
                return this->get(SQLITE_LIMIT_VARIABLE_NUMBER);
            }

            void variable_number(int newValue) {
                this->set(SQLITE_LIMIT_VARIABLE_NUMBER, newValue);
            }

            int trigger_depth() {
                return this->get(SQLITE_LIMIT_TRIGGER_DEPTH);
            }

            void trigger_depth(int newValue) {
                this->set(SQLITE_LIMIT_TRIGGER_DEPTH, newValue);
            }

#if SQLITE_VERSION_NUMBER >= 3008007
            int worker_threads() {
                return this->get(SQLITE_LIMIT_WORKER_THREADS);
            }

            void worker_threads(int newValue) {
                this->set(SQLITE_LIMIT_WORKER_THREADS, newValue);
            }
#endif

          protected:
            get_connection_t get_connection;

            friend struct storage_base;

            /**
             *  Stores limit set between connections.
             */
            std::map<int, int> limits;

            int get(int id) {
                auto connection = this->get_connection();
                return sqlite3_limit(connection.get(), id, -1);
            }

            void set(int id, int newValue) {
                this->limits[id] = newValue;
                auto connection = this->get_connection();
                sqlite3_limit(connection.get(), id, newValue);
            }
        };
    }
}

// #include "transaction_guard.h"

#include <functional>  //  std::function
#include <utility>  //  std::move

// #include "connection_holder.h"

namespace sqlite_orm {

    namespace internal {

        /**
         *  Class used as a guard for a transaction. Calls `ROLLBACK` in destructor.
         *  Has explicit `commit()` and `rollback()` functions. After explicit function is fired
         *  guard won't do anything in d-tor. Also you can set `commit_on_destroy` to true to
         *  make it call `COMMIT` on destroy.
         * 
         *  Note: The guard's destructor is explicitly marked as potentially throwing,
         *  so exceptions that occur during commit or rollback are propagated to the caller.
         */
        struct transaction_guard_t {
            /**
             *  This is a public lever to tell a guard what it must do in its destructor
             *  if `gotta_fire` is true
             */
            bool commit_on_destroy = false;

            transaction_guard_t(connection_ref connection_,
                                std::function<void()> commit_func_,
                                std::function<void()> rollback_func_) :
                connection(std::move(connection_)),
                commit_func(std::move(commit_func_)), rollback_func(std::move(rollback_func_)) {}

            transaction_guard_t(transaction_guard_t&& other) :
                commit_on_destroy(other.commit_on_destroy), connection(std::move(other.connection)),
                commit_func(std::move(other.commit_func)), rollback_func(std::move(other.rollback_func)),
                gotta_fire(other.gotta_fire) {
                other.gotta_fire = false;
            }

            ~transaction_guard_t() noexcept(false) {
                if(this->gotta_fire) {
                    if(this->commit_on_destroy) {
                        this->commit_func();
                    } else {
                        this->rollback_func();
                    }
                }
            }

            transaction_guard_t& operator=(transaction_guard_t&&) = delete;

            /**
             *  Call `COMMIT` explicitly. After this call
             *  guard will not call `COMMIT` or `ROLLBACK`
             *  in its destructor.
             */
            void commit() {
                this->gotta_fire = false;
                this->commit_func();
            }

            /**
             *  Call `ROLLBACK` explicitly. After this call
             *  guard will not call `COMMIT` or `ROLLBACK`
             *  in its destructor.
             */
            void rollback() {
                this->gotta_fire = false;
                this->rollback_func();
            }

          protected:
            connection_ref connection;
            std::function<void()> commit_func;
            std::function<void()> rollback_func;
            bool gotta_fire = true;
        };
    }
}

// #include "row_extractor.h"

// #include "connection_holder.h"

// #include "backup.h"

#include "sqlite3.h"
#include <system_error>  //  std::system_error
#include <string>  //  std::string
#include <memory>
#include <utility>  //  std::move, std::exchange

// #include "error_code.h"

// #include "connection_holder.h"

namespace sqlite_orm {

    namespace internal {

        /**
         *  A backup class. Don't construct it as is, call storage.make_backup_from or storage.make_backup_to instead.
         *  An instance of this class represents a wrapper around sqlite3_backup pointer. Use this class
         *  to have maximum control on a backup operation. In case you need a single backup in one line you
         *  can skip creating a backup_t instance and just call storage.backup_from or storage.backup_to function.
         */
        struct backup_t {
            backup_t(connection_ref to_,
                     const std::string& zDestName,
                     connection_ref from_,
                     const std::string& zSourceName,
                     std::unique_ptr<connection_holder> holder_) :
                handle(sqlite3_backup_init(to_.get(), zDestName.c_str(), from_.get(), zSourceName.c_str())),
                holder(std::move(holder_)), to(to_), from(from_) {
                if(!this->handle) {
                    throw std::system_error{orm_error_code::failed_to_init_a_backup};
                }
            }

            backup_t(backup_t&& other) :
                handle(std::exchange(other.handle, nullptr)), holder(std::move(other.holder)), to(other.to),
                from(other.from) {}

            ~backup_t() {
                if(this->handle) {
                    (void)sqlite3_backup_finish(this->handle);
                }
            }

            /**
             *  Calls sqlite3_backup_step with pages argument
             */
            int step(int pages) {
                return sqlite3_backup_step(this->handle, pages);
            }

            /**
             *  Returns sqlite3_backup_remaining result
             */
            int remaining() const {
                return sqlite3_backup_remaining(this->handle);
            }

            /**
             *  Returns sqlite3_backup_pagecount result
             */
            int pagecount() const {
                return sqlite3_backup_pagecount(this->handle);
            }

          protected:
            sqlite3_backup* handle = nullptr;
            std::unique_ptr<connection_holder> holder;
            connection_ref to;
            connection_ref from;
        };
    }
}

// #include "function.h"

// #include "values_to_tuple.h"

#include "sqlite3.h"
#include <type_traits>  //  std::enable_if, std::is_same, std::index_sequence, std::make_index_sequence
#include <tuple>  //  std::tuple, std::tuple_size, std::tuple_element

// #include "functional/cxx_universal.h"
//  ::size_t
// #include "functional/cxx_functional_polyfill.h"

// #include "type_traits.h"

// #include "row_extractor.h"

// #include "arg_values.h"

#include "sqlite3.h"

// #include "row_extractor.h"

namespace sqlite_orm {

    /** @short Wrapper around a dynamically typed value object.
     */
    struct arg_value {

        arg_value() : arg_value(nullptr) {}

        arg_value(sqlite3_value* value_) : value(value_) {}

        template<class T>
        T get() const {
            const auto rowExtractor = internal::boxed_value_extractor<T>();
            return rowExtractor.extract(this->value);
        }

        bool is_null() const {
            auto type = sqlite3_value_type(this->value);
            return type == SQLITE_NULL;
        }

        bool is_text() const {
            auto type = sqlite3_value_type(this->value);
            return type == SQLITE_TEXT;
        }

        bool is_integer() const {
            auto type = sqlite3_value_type(this->value);
            return type == SQLITE_INTEGER;
        }

        bool is_float() const {
            auto type = sqlite3_value_type(this->value);
            return type == SQLITE_FLOAT;
        }

        bool is_blob() const {
            auto type = sqlite3_value_type(this->value);
            return type == SQLITE_BLOB;
        }

        bool empty() const {
            return this->value == nullptr;
        }

      private:
        sqlite3_value* value = nullptr;
    };

    struct arg_values {

        struct iterator {

            iterator(const arg_values& container_, int index_) :
                container(container_), index(index_),
                currentValue(index_ < int(container_.size()) ? container_[index_] : arg_value()) {}

            iterator& operator++() {
                ++this->index;
                if(this->index < int(this->container.size())) {
                    this->currentValue = this->container[this->index];
                } else {
                    this->currentValue = {};
                }
                return *this;
            }

            iterator operator++(int) {
                auto res = *this;
                ++this->index;
                if(this->index < int(this->container.size())) {
                    this->currentValue = this->container[this->index];
                } else {
                    this->currentValue = {};
                }
                return res;
            }

            arg_value operator*() const {
                if(this->index < int(this->container.size()) && this->index >= 0) {
                    return this->currentValue;
                } else {
                    throw std::system_error{orm_error_code::index_is_out_of_bounds};
                }
            }

            arg_value* operator->() const {
                return &this->currentValue;
            }

            bool operator==(const iterator& other) const {
                return &other.container == &this->container && other.index == this->index;
            }

            bool operator!=(const iterator& other) const {
                return !(*this == other);
            }

          private:
            const arg_values& container;
            int index = 0;
            mutable arg_value currentValue;
        };

        arg_values() : arg_values(0, nullptr) {}

        arg_values(int argsCount_, sqlite3_value** values_) : argsCount(argsCount_), values(values_) {}

        size_t size() const {
            return this->argsCount;
        }

        bool empty() const {
            return 0 == this->argsCount;
        }

        arg_value operator[](int index) const {
            if(index < this->argsCount && index >= 0) {
                sqlite3_value* value = this->values[index];
                return {value};
            } else {
                throw std::system_error{orm_error_code::index_is_out_of_bounds};
            }
        }

        arg_value at(int index) const {
            return this->operator[](index);
        }

        iterator begin() const {
            return {*this, 0};
        }

        iterator end() const {
            return {*this, this->argsCount};
        }

      private:
        int argsCount = 0;
        sqlite3_value** values = nullptr;
    };
}

namespace sqlite_orm {

    namespace internal {

        template<class Tpl>
        struct tuple_from_values {
            template<class R = Tpl, satisfies_not<std::is_same, R, std::tuple<arg_values>> = true>
            R operator()(sqlite3_value** values, int /*argsCount*/) const {
                return this->create_from(values, std::make_index_sequence<std::tuple_size<Tpl>::value>{});
            }

            template<class R = Tpl, satisfies<std::is_same, R, std::tuple<arg_values>> = true>
            R operator()(sqlite3_value** values, int argsCount) const {
                return {arg_values(argsCount, values)};
            }

          private:
            template<size_t... Idx>
            Tpl create_from(sqlite3_value** values, std::index_sequence<Idx...>) const {
                return {this->extract<std::tuple_element_t<Idx, Tpl>>(values[Idx])...};
            }

            template<class T>
            T extract(sqlite3_value* value) const {
                const auto rowExtractor = boxed_value_extractor<T>();
                return rowExtractor.extract(value);
            }
        };
    }
}

// #include "arg_values.h"

// #include "util.h"

// #include "xdestroy_handling.h"

// #include "udf_proxy.h"

#include "sqlite3.h"
#include <cassert>  //  assert
#include <type_traits>  //  std::true_type, std::false_type
#include <new>  //  std::bad_alloc
#include <memory>  //  std::allocator, std::allocator_traits, std::unique_ptr
#include <string>  //  std::string
#include <functional>  //  std::function
#include <utility>  //  std::move, std::pair

// #include "error_code.h"

namespace sqlite_orm {
    namespace internal {
        /*
         *  Returns properly allocated memory space for the specified application-defined function object
         *  paired with an accompanying deallocation function.
         */
        template<class UDF>
        std::pair<void*, xdestroy_fn_t> preallocate_udf_memory() {
            std::allocator<UDF> allocator;
            using traits = std::allocator_traits<decltype(allocator)>;

            SQLITE_ORM_CONSTEXPR_LAMBDA_CPP17 auto deallocate = [](void* location) noexcept {
                std::allocator<UDF> allocator;
                using traits = std::allocator_traits<decltype(allocator)>;
                traits::deallocate(allocator, (UDF*)location, 1);
            };

            return {traits::allocate(allocator, 1), deallocate};
        }

        /*
         *  Returns a pair of functions to allocate/deallocate properly aligned memory space for the specified application-defined function object.
         */
        template<class UDF>
        std::pair<void* (*)(), xdestroy_fn_t> obtain_udf_allocator() {
            SQLITE_ORM_CONSTEXPR_LAMBDA_CPP17 auto allocate = []() {
                std::allocator<UDF> allocator;
                using traits = std::allocator_traits<decltype(allocator)>;
                return (void*)traits::allocate(allocator, 1);
            };

            SQLITE_ORM_CONSTEXPR_LAMBDA_CPP17 auto deallocate = [](void* location) noexcept {
                std::allocator<UDF> allocator;
                using traits = std::allocator_traits<decltype(allocator)>;
                traits::deallocate(allocator, (UDF*)location, 1);
            };

            return {allocate, deallocate};
        }

        /*
         *  A deleter that only destroys the application-defined function object.
         */
        struct udf_destruct_only_deleter {
            template<class UDF>
            void operator()(UDF* f) const noexcept {
                std::allocator<UDF> allocator;
                using traits = std::allocator_traits<decltype(allocator)>;
                traits::destroy(allocator, f);
            }
        };

        /*
         *  Stores type-erased information in relation to an application-defined scalar or aggregate function object:
         *  - name and argument count
         *  - function dispatch (step, final)
         *  - either preallocated memory with a possibly a priori constructed function object [scalar],
         *  - or memory allocation/deallocation functions [aggregate]
         */
        struct udf_proxy {
            using sqlite_func_t = void (*)(sqlite3_context* context, int argsCount, sqlite3_value** values);
            using final_call_fn_t = void (*)(void* udfHandle, sqlite3_context* context);
            using memory_alloc = std::pair<void* (*)() /*allocate*/, xdestroy_fn_t /*deallocate*/>;
            using memory_space = std::pair<void* /*udfHandle*/, xdestroy_fn_t /*deallocate*/>;

            std::string name;
            int argumentsCount;
            std::function<void(void* location)> constructAt;
            xdestroy_fn_t destroy;
            sqlite_func_t func;
            final_call_fn_t finalAggregateCall;

            // allocator/deallocator function pair for aggregate UDF
            const memory_alloc udfAllocator;
            // pointer to preallocated memory space for scalar UDF, already constructed by caller if stateless
            const memory_space udfMemorySpace;

            udf_proxy(std::string name,
                      int argumentsCount,
                      std::function<void(void* location)> constructAt,
                      xdestroy_fn_t destroy,
                      sqlite_func_t func,
                      memory_space udfMemorySpace) :
                name{std::move(name)},
                argumentsCount{argumentsCount}, constructAt{std::move(constructAt)}, destroy{destroy}, func{func},
                finalAggregateCall{nullptr}, udfAllocator{}, udfMemorySpace{udfMemorySpace} {}

            udf_proxy(std::string name,
                      int argumentsCount,
                      std::function<void(void* location)> constructAt,
                      xdestroy_fn_t destroy,
                      sqlite_func_t func,
                      final_call_fn_t finalAggregateCall,
                      memory_alloc udfAllocator) :
                name{std::move(name)},
                argumentsCount{argumentsCount}, constructAt{std::move(constructAt)}, destroy{destroy}, func{func},
                finalAggregateCall{finalAggregateCall}, udfAllocator{udfAllocator}, udfMemorySpace{} {}

            ~udf_proxy() {
                // destruct
                if(/*bool aprioriConstructed = */ !constructAt && destroy) {
                    destroy(udfMemorySpace.first);
                }
                // deallocate
                if(udfMemorySpace.second) {
                    udfMemorySpace.second(udfMemorySpace.first);
                }
            }

            udf_proxy(const udf_proxy&) = delete;
            udf_proxy& operator=(const udf_proxy&) = delete;

            // convenience accessors for better legibility;
            // [`friend` is intentional - it ensures that these are core accessors (only found via ADL), yet still be an out-of-class interface]

            friend void* preallocated_udf_handle(udf_proxy* proxy) {
                return proxy->udfMemorySpace.first;
            }

            friend void* allocate_udf(udf_proxy* proxy) {
                return proxy->udfAllocator.first();
            }

            friend void deallocate_udf(udf_proxy* proxy, void* udfHandle) {
                proxy->udfAllocator.second(udfHandle);
            }
        };

        // safety net of doing a triple check at runtime
        inline void assert_args_count(const udf_proxy* proxy, int argsCount) {
            assert((proxy->argumentsCount == -1) || (proxy->argumentsCount == argsCount ||
                                                     /*check fin call*/ argsCount == -1));
            (void)proxy;
            (void)argsCount;
        }

        // safety net of doing a triple check at runtime
        inline void proxy_assert_args_count(sqlite3_context* context, int argsCount) {
            udf_proxy* proxy;
            assert((proxy = static_cast<udf_proxy*>(sqlite3_user_data(context))) != nullptr);
            assert_args_count(proxy, argsCount);
            (void)context;
        }

        // note: may throw `std::bad_alloc` in case memory space for the aggregate function object cannot be allocated
        inline void* ensure_aggregate_udf(sqlite3_context* context, udf_proxy* proxy, int argsCount) {
            // reserve memory for storing a void pointer (which is the `udfHandle`, i.e. address of the aggregate function object)
            void* ctxMemory = sqlite3_aggregate_context(context, sizeof(void*));
            if(!ctxMemory) SQLITE_ORM_CPP_UNLIKELY {
                throw std::bad_alloc();
            }
            void*& udfHandle = *static_cast<void**>(ctxMemory);

            if(udfHandle) SQLITE_ORM_CPP_LIKELY {
                return udfHandle;
            } else {
                assert_args_count(proxy, argsCount);
                udfHandle = allocate_udf(proxy);
                // Note on the use of the `udfHandle` pointer after the object construction:
                // since we only ever cast between void* and UDF* pointer types and
                // only use the memory space for one type during the entire lifetime of a proxy,
                // we can use `udfHandle` interconvertibly without laundering its provenance.
                proxy->constructAt(udfHandle);
                return udfHandle;
            }
        }

        inline void delete_aggregate_udf(udf_proxy* proxy, void* udfHandle) {
            proxy->destroy(udfHandle);
            deallocate_udf(proxy, udfHandle);
        }

        // Return C pointer to preallocated and a priori constructed UDF
        template<class UDF>
        inline UDF*
        proxy_get_scalar_udf(std::true_type /*is_stateless*/, sqlite3_context* context, int argsCount) noexcept {
            proxy_assert_args_count(context, argsCount);
            udf_proxy* proxy = static_cast<udf_proxy*>(sqlite3_user_data(context));
            return static_cast<UDF*>(preallocated_udf_handle(proxy));
        }

        // Return unique pointer to newly constructed UDF at preallocated memory space
        template<class UDF>
        inline auto proxy_get_scalar_udf(std::false_type /*is_stateless*/, sqlite3_context* context, int argsCount) {
            proxy_assert_args_count(context, argsCount);
            udf_proxy* proxy = static_cast<udf_proxy*>(sqlite3_user_data(context));
            // Note on the use of the `udfHandle` pointer after the object construction:
            // since we only ever cast between void* and UDF* pointer types and
            // only use the memory space for one type during the entire lifetime of a proxy,
            // we can use `udfHandle` interconvertibly without laundering its provenance.
            proxy->constructAt(preallocated_udf_handle(proxy));
            return std::unique_ptr<UDF, xdestroy_fn_t>{static_cast<UDF*>(preallocated_udf_handle(proxy)),
                                                       proxy->destroy};
        }

        // note: may throw `std::bad_alloc` in case memory space for the aggregate function object cannot be allocated
        template<class UDF>
        inline UDF* proxy_get_aggregate_step_udf(sqlite3_context* context, int argsCount) {
            udf_proxy* proxy = static_cast<udf_proxy*>(sqlite3_user_data(context));
            void* udfHandle = ensure_aggregate_udf(context, proxy, argsCount);
            return static_cast<UDF*>(udfHandle);
        }

        inline void aggregate_function_final_callback(sqlite3_context* context) {
            udf_proxy* proxy = static_cast<udf_proxy*>(sqlite3_user_data(context));
            void* udfHandle;
            try {
                // note: it is possible that the 'step' function was never called
                udfHandle = ensure_aggregate_udf(context, proxy, -1);
            } catch(const std::bad_alloc&) {
                sqlite3_result_error_nomem(context);
                return;
            }
            proxy->finalAggregateCall(udfHandle, context);
            delete_aggregate_udf(proxy, udfHandle);
        }
    }
}

// #include "serializing_util.h"

namespace sqlite_orm {

    namespace internal {

        struct storage_base {
            using collating_function = std::function<int(int, const void*, int, const void*)>;

            std::function<void(sqlite3*)> on_open;
            pragma_t pragma;
            limit_accessor limit;

            transaction_guard_t transaction_guard() {
                this->begin_transaction();
                return {this->get_connection(),
                        std::bind(&storage_base::commit, this),
                        std::bind(&storage_base::rollback, this)};
            }

            transaction_guard_t deferred_transaction_guard() {
                this->begin_deferred_transaction();
                return {this->get_connection(),
                        std::bind(&storage_base::commit, this),
                        std::bind(&storage_base::rollback, this)};
            }

            transaction_guard_t immediate_transaction_guard() {
                this->begin_immediate_transaction();
                return {this->get_connection(),
                        std::bind(&storage_base::commit, this),
                        std::bind(&storage_base::rollback, this)};
            }

            transaction_guard_t exclusive_transaction_guard() {
                this->begin_exclusive_transaction();
                return {this->get_connection(),
                        std::bind(&storage_base::commit, this),
                        std::bind(&storage_base::rollback, this)};
            }

            void drop_index(const std::string& indexName) {
                std::stringstream ss;
                ss << "DROP INDEX " << quote_identifier(indexName) << std::flush;
                perform_void_exec(this->get_connection().get(), ss.str());
            }

            void drop_trigger(const std::string& triggerName) {
                std::stringstream ss;
                ss << "DROP TRIGGER " << quote_identifier(triggerName) << std::flush;
                perform_void_exec(this->get_connection().get(), ss.str());
            }

            void vacuum() {
                perform_void_exec(this->get_connection().get(), "VACUUM");
            }

            /**
             *  Drops table with given name.
             */
            void drop_table(const std::string& tableName) {
                this->drop_table_internal(this->get_connection().get(), tableName);
            }

            /**
             * Rename table named `from` to `to`.
             */
            void rename_table(const std::string& from, const std::string& to) {
                this->rename_table(this->get_connection().get(), from, to);
            }

          protected:
            void rename_table(sqlite3* db, const std::string& oldName, const std::string& newName) const {
                std::stringstream ss;
                ss << "ALTER TABLE " << streaming_identifier(oldName) << " RENAME TO " << streaming_identifier(newName)
                   << std::flush;
                perform_void_exec(db, ss.str());
            }

            /**
             *  Checks whether table exists in db. Doesn't check storage itself - works only with actual database.
             *  Note: table can be not mapped to a storage
             *  @return true if table with a given name exists in db, false otherwise.
             */
            bool table_exists(const std::string& tableName) {
                auto con = this->get_connection();
                return this->table_exists(con.get(), tableName);
            }

            bool table_exists(sqlite3* db, const std::string& tableName) const {
                bool result = false;
                std::stringstream ss;
                ss << "SELECT COUNT(*) FROM sqlite_master WHERE type = " << quote_string_literal("table")
                   << " AND name = " << quote_string_literal(tableName) << std::flush;
                perform_exec(
                    db,
                    ss.str(),
                    [](void* data, int argc, char** argv, char** /*azColName*/) -> int {
                        auto& res = *(bool*)data;
                        if(argc) {
                            res = !!std::atoi(argv[0]);
                        }
                        return 0;
                    },
                    &result);
                return result;
            }

            void add_generated_cols(std::vector<const table_xinfo*>& columnsToAdd,
                                    const std::vector<table_xinfo>& storageTableInfo) {
                //  iterate through storage columns
                for(const table_xinfo& storageColumnInfo: storageTableInfo) {
                    if(storageColumnInfo.hidden) {
                        columnsToAdd.push_back(&storageColumnInfo);
                    }
                }
            }

          public:
            /**
             *  sqlite3_changes function.
             */
            int changes() {
                auto con = this->get_connection();
                return sqlite3_changes(con.get());
            }

            /**
             *  sqlite3_total_changes function.
             */
            int total_changes() {
                auto con = this->get_connection();
                return sqlite3_total_changes(con.get());
            }

            int64 last_insert_rowid() {
                auto con = this->get_connection();
                return sqlite3_last_insert_rowid(con.get());
            }

            int busy_timeout(int ms) {
                auto con = this->get_connection();
                return sqlite3_busy_timeout(con.get(), ms);
            }

            /**
             *  Returns libsqlite3 version, not sqlite_orm
             */
            std::string libversion() {
                return sqlite3_libversion();
            }

            bool transaction(const std::function<bool()>& f) {
                auto guard = this->transaction_guard();
                return guard.commit_on_destroy = f();
            }

            std::string current_time() {
                auto con = this->get_connection();
                return this->current_time(con.get());
            }

            std::string current_date() {
                auto con = this->get_connection();
                return this->current_date(con.get());
            }

            std::string current_timestamp() {
                auto con = this->get_connection();
                return this->current_timestamp(con.get());
            }

#if SQLITE_VERSION_NUMBER >= 3007010
            /**
             * \fn db_release_memory
             * \brief Releases freeable memory of database. It is function can/should be called periodically by
             * application, if application has less memory usage constraint. \note sqlite3_db_release_memory added
             * in 3.7.10 https://sqlite.org/changes.html
             */
            int db_release_memory() {
                auto con = this->get_connection();
                return sqlite3_db_release_memory(con.get());
            }
#endif

            /**
             *  Returns existing permanent table names in database. Doesn't check storage itself - works only with
             * actual database.
             *  @return Returns list of tables in database.
             */
            std::vector<std::string> table_names() {
                auto con = this->get_connection();
                std::vector<std::string> tableNames;
                using data_t = std::vector<std::string>;
                perform_exec(
                    con.get(),
                    "SELECT name FROM sqlite_master WHERE type='table'",
                    [](void* data, int argc, char** argv, char** /*columnName*/) -> int {
                        auto& tableNames_ = *(data_t*)data;
                        for(int i = 0; i < argc; ++i) {
                            if(argv[i]) {
                                tableNames_.emplace_back(argv[i]);
                            }
                        }
                        return 0;
                    },
                    &tableNames);
                tableNames.shrink_to_fit();
                return tableNames;
            }

            /**
             *  Call it once during storage lifetime to make it keeping its connection opened till dtor call.
             *  By default if storage is not in-memory it calls `sqlite3_open` only when the connection is really
             *  needed and closes when it is not needed. This function breaks this rule. In memory storage always
             *  keeps connection opened so calling this for in-memory storage changes nothing.
             *  Note about multithreading: in multithreading context avoiding using this function for not in-memory
             *  storage may lead to data races. If you have data races in such a configuration try to call `open_forever`
             *  before accessing your storage - it may fix data races.
             */
            void open_forever() {
                this->isOpenedForever = true;
                this->connection->retain();
                if(1 == this->connection->retain_count()) {
                    this->on_open_internal(this->connection->get());
                }
            }

            /**
             * Create an application-defined scalar SQL function.
             * Can be called at any time no matter whether the database connection is opened or not.
             * 
             * Note: `create_scalar_function()` merely creates a closure to generate an instance of the scalar function object,
             * together with a copy of the passed initialization arguments.
             * If `F` is a stateless function object, an instance of the function object is created once, otherwise
             * an instance of the function object is repeatedly recreated for each result row,
             * ensuring that the calculations always start with freshly initialized values.
             * 
             * T - function class. T must have operator() overload and static name function like this:
             * ```
             *  struct SqrtFunction {
             *
             *      double operator()(double arg) const {
             *          return std::sqrt(arg);
             *      }
             *
             *      static const char *name() {
             *          return "SQRT";
             *      }
             *  };
             * ```
             */
            template<class F, class... Args>
            void create_scalar_function(Args&&... constructorArgs) {
                static_assert(is_scalar_udf_v<F>, "F must be a scalar function");

                this->create_scalar_function_impl(
                    udf_holder<F>{},
#ifdef SQLITE_ORM_PACK_EXPANSION_IN_INIT_CAPTURE_SUPPORTED
                    /* constructAt */ [... constructorArgs = std::move(constructorArgs)](void* location) {
#else
                    /* constructAt */
                    [constructorArgs...](void* location) {
#endif
                        std::allocator<F> allocator;
                        using traits = std::allocator_traits<decltype(allocator)>;
                        traits::construct(allocator, (F*)location, constructorArgs...);
                    });
            }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
            /**
             * Create an application-defined scalar function.
             * Can be called at any time no matter whether the database connection is opened or not.
             * 
             * Note: `create_scalar_function()` merely creates a closure to generate an instance of the scalar function object,
             * together with a copy of the passed initialization arguments.
             * If `F` is a stateless function object, an instance of the function object is created once, otherwise
             * an instance of the function object is repeatedly recreated for each result row,
             * ensuring that the calculations always start with freshly initialized values.
             */
            template<orm_scalar_function auto f, std::copy_constructible... Args>
            void create_scalar_function(Args&&... constructorArgs) {
                return this->create_scalar_function<auto_udf_type_t<f>>(std::forward<Args>(constructorArgs)...);
            }

            /**
             * Create an application-defined scalar function.
             * Can be called at any time no matter whether the database connection is opened or not.
             *
             * If `quotedF` contains a freestanding function, stateless lambda or stateless function object,
             * `quoted_scalar_function::callable()` uses the original function object, assuming it is free of side effects;
             * otherwise, it repeatedly uses a copy of the contained function object, assuming possible side effects.
             */
            template<orm_quoted_scalar_function auto quotedF>
            void create_scalar_function() {
                using Sig = auto_udf_type_t<quotedF>;
                using args_tuple = typename callable_arguments<Sig>::args_tuple;
                using return_type = typename callable_arguments<Sig>::return_type;
                constexpr auto argsCount = std::is_same<args_tuple, std::tuple<arg_values>>::value
                                               ? -1
                                               : int(std::tuple_size<args_tuple>::value);
                this->scalarFunctions.emplace_back(
                    std::string{quotedF.name()},
                    argsCount,
                    /* constructAt = */
                    nullptr,
                    /* destroy = */
                    nullptr,
                    /* call = */
                    [](sqlite3_context* context, int argsCount, sqlite3_value** values) {
                        proxy_assert_args_count(context, argsCount);
                        args_tuple argsTuple = tuple_from_values<args_tuple>{}(values, argsCount);
                        auto result = polyfill::apply(quotedF.callable(), std::move(argsTuple));
                        statement_binder<return_type>().result(context, result);
                    },
                    /* finalCall = */
                    nullptr,
                    std::pair{nullptr, null_xdestroy_f});

                if(this->connection->retain_count() > 0) {
                    sqlite3* db = this->connection->get();
                    try_to_create_scalar_function(db, this->scalarFunctions.back());
                }
            }
#endif

            /**
             * Create an application-defined aggregate SQL function.
             * Can be called at any time no matter whether the database connection is opened or not.
             * 
             * Note: `create_aggregate_function()` merely creates a closure to generate an instance of the aggregate function object,
             * together with a copy of the passed initialization arguments.
             * An instance of the function object is repeatedly recreated for each result row,
             * ensuring that the calculations always start with freshly initialized values.
             * 
             * T - function class. T must have step member function, fin member function and static name function like this:
             * ```
             *   struct MeanFunction {
             *       double total = 0;
             *       int count = 0;
             *
             *       void step(double value) {
             *           total += value;
             *           ++count;
             *       }
             *
             *       int fin() const {
             *           return total / count;
             *       }
             *
             *       static std::string name() {
             *           return "MEAN";
             *       }
             *   };
             * ```
             */
            template<class F, class... Args>
            void create_aggregate_function(Args&&... constructorArgs) {
                static_assert(is_aggregate_udf_v<F>, "F must be an aggregate function");

                this->create_aggregate_function_impl(
                    udf_holder<F>{}, /* constructAt = */
#ifdef SQLITE_ORM_PACK_EXPANSION_IN_INIT_CAPTURE_SUPPORTED
                    /* constructAt */ [... constructorArgs = std::move(constructorArgs)](void* location) {
#else
                    /* constructAt */
                    [constructorArgs...](void* location) {
#endif
                        std::allocator<F> allocator;
                        using traits = std::allocator_traits<decltype(allocator)>;
                        traits::construct(allocator, (F*)location, constructorArgs...);
                    });
            }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
            /**
             * Create an application-defined aggregate function.
             * Can be called at any time no matter whether the database connection is opened or not.
             * 
             * Note: `create_aggregate_function()` merely creates a closure to generate an instance of the aggregate function object,
             * together with a copy of the passed initialization arguments.
             * An instance of the function object is repeatedly recreated for each result row,
             * ensuring that the calculations always start with freshly initialized values.
             */
            template<orm_aggregate_function auto f, std::copy_constructible... Args>
            void create_aggregate_function(Args&&... constructorArgs) {
                return this->create_aggregate_function<auto_udf_type_t<f>>(std::forward<Args>(constructorArgs)...);
            }
#endif

            /**
             *  Delete a scalar function you created before.
             *  Can be called at any time no matter whether the database connection is open or not.
             */
            template<class F>
            void delete_scalar_function() {
                static_assert(is_scalar_udf_v<F>, "F must be a scalar function");
                udf_holder<F> udfName;
                this->delete_function_impl(udfName(), this->scalarFunctions);
            }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
            /**
             *  Delete a scalar function you created before.
             *  Can be called at any time no matter whether the database connection is open or not.
             */
            template<orm_scalar_function auto f>
            void delete_scalar_function() {
                this->delete_function_impl(f.name(), this->scalarFunctions);
            }

            /**
             *  Delete a quoted scalar function you created before.
             *  Can be called at any time no matter whether the database connection is open or not.
             */
            template<orm_quoted_scalar_function auto quotedF>
            void delete_scalar_function() {
                this->delete_function_impl(quotedF.name(), this->scalarFunctions);
            }
#endif

            /**
             *  Delete aggregate function you created before.
             *  Can be called at any time no matter whether the database connection is open or not.
             */
            template<class F>
            void delete_aggregate_function() {
                static_assert(is_aggregate_udf_v<F>, "F must be an aggregate function");
                udf_holder<F> udfName;
                this->delete_function_impl(udfName(), this->aggregateFunctions);
            }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
            template<orm_aggregate_function auto f>
            void delete_aggregate_function() {
                this->delete_function_impl(f.name(), this->aggregateFunctions);
            }
#endif

            template<class C>
            void create_collation() {
                collating_function func = [](int leftLength, const void* lhs, int rightLength, const void* rhs) {
                    C collatingObject;
                    return collatingObject(leftLength, lhs, rightLength, rhs);
                };
                std::stringstream ss;
                ss << C::name() << std::flush;
                this->create_collation(ss.str(), std::move(func));
            }

            void create_collation(const std::string& name, collating_function f) {
                const auto functionExists = bool(f);
                collating_function* function = nullptr;
                if(functionExists) {
                    function = &(collatingFunctions[name] = std::move(f));
                }

                //  create collations if db is open
                if(this->connection->retain_count() > 0) {
                    sqlite3* db = this->connection->get();
                    int rc = sqlite3_create_collation(db,
                                                      name.c_str(),
                                                      SQLITE_UTF8,
                                                      function,
                                                      functionExists ? collate_callback : nullptr);
                    if(rc != SQLITE_OK) {
                        throw_translated_sqlite_error(db);
                    }
                }

                if(!functionExists) {
                    collatingFunctions.erase(name);
                }
            }

            template<class C>
            void delete_collation() {
                std::stringstream ss;
                ss << C::name() << std::flush;
                this->create_collation(ss.str(), {});
            }

            void begin_transaction() {
                this->begin_transaction_internal("BEGIN TRANSACTION");
            }

            void begin_deferred_transaction() {
                this->begin_transaction_internal("BEGIN DEFERRED TRANSACTION");
            }

            void begin_immediate_transaction() {
                this->begin_transaction_internal("BEGIN IMMEDIATE TRANSACTION");
            }

            void begin_exclusive_transaction() {
                this->begin_transaction_internal("BEGIN EXCLUSIVE TRANSACTION");
            }

            void commit() {
                sqlite3* db = this->connection->get();
                perform_void_exec(db, "COMMIT");
                this->connection->release();
                if(this->connection->retain_count() < 0) {
                    throw std::system_error{orm_error_code::no_active_transaction};
                }
            }

            void rollback() {
                sqlite3* db = this->connection->get();
                perform_void_exec(db, "ROLLBACK");
                this->connection->release();
                if(this->connection->retain_count() < 0) {
                    throw std::system_error{orm_error_code::no_active_transaction};
                }
            }

            void backup_to(const std::string& filename) {
                auto backup = this->make_backup_to(filename);
                backup.step(-1);
            }

            void backup_to(storage_base& other) {
                auto backup = this->make_backup_to(other);
                backup.step(-1);
            }

            void backup_from(const std::string& filename) {
                auto backup = this->make_backup_from(filename);
                backup.step(-1);
            }

            void backup_from(storage_base& other) {
                auto backup = this->make_backup_from(other);
                backup.step(-1);
            }

            backup_t make_backup_to(const std::string& filename) {
                auto holder = std::make_unique<connection_holder>(filename);
                connection_ref conRef{*holder};
                return {conRef, "main", this->get_connection(), "main", std::move(holder)};
            }

            backup_t make_backup_to(storage_base& other) {
                return {other.get_connection(), "main", this->get_connection(), "main", {}};
            }

            backup_t make_backup_from(const std::string& filename) {
                auto holder = std::make_unique<connection_holder>(filename);
                connection_ref conRef{*holder};
                return {this->get_connection(), "main", conRef, "main", std::move(holder)};
            }

            backup_t make_backup_from(storage_base& other) {
                return {this->get_connection(), "main", other.get_connection(), "main", {}};
            }

            const std::string& filename() const {
                return this->connection->filename;
            }

            /**
             * Checks whether connection to database is opened right now.
             * Returns always `true` for in memory databases.
             */
            bool is_opened() const {
                return this->connection->retain_count() > 0;
            }

            /*
             * returning false when there is a transaction in place
             * otherwise true; function is not const because it has to call get_connection()
             */
            bool get_autocommit() {
                auto con = this->get_connection();
                return sqlite3_get_autocommit(con.get());
            }

            int busy_handler(std::function<int(int)> handler) {
                _busy_handler = std::move(handler);
                if(this->is_opened()) {
                    if(_busy_handler) {
                        return sqlite3_busy_handler(this->connection->get(), busy_handler_callback, this);
                    } else {
                        return sqlite3_busy_handler(this->connection->get(), nullptr, nullptr);
                    }
                } else {
                    return SQLITE_OK;
                }
            }

          protected:
            storage_base(std::string filename, int foreignKeysCount) :
                pragma(std::bind(&storage_base::get_connection, this)),
                limit(std::bind(&storage_base::get_connection, this)),
                inMemory(filename.empty() || filename == ":memory:"),
                connection(std::make_unique<connection_holder>(std::move(filename))),
                cachedForeignKeysCount(foreignKeysCount) {
                if(this->inMemory) {
                    this->connection->retain();
                    this->on_open_internal(this->connection->get());
                }
            }

            storage_base(const storage_base& other) :
                on_open(other.on_open), pragma(std::bind(&storage_base::get_connection, this)),
                limit(std::bind(&storage_base::get_connection, this)), inMemory(other.inMemory),
                connection(std::make_unique<connection_holder>(other.connection->filename)),
                cachedForeignKeysCount(other.cachedForeignKeysCount) {
                if(this->inMemory) {
                    this->connection->retain();
                    this->on_open_internal(this->connection->get());
                }
            }

            ~storage_base() {
                if(this->isOpenedForever) {
                    this->connection->release();
                }
                if(this->inMemory) {
                    this->connection->release();
                }
            }

            void begin_transaction_internal(const std::string& query) {
                this->connection->retain();
                if(1 == this->connection->retain_count()) {
                    this->on_open_internal(this->connection->get());
                }
                sqlite3* db = this->connection->get();
                perform_void_exec(db, query);
            }

            connection_ref get_connection() {
                connection_ref res{*this->connection};
                if(1 == this->connection->retain_count()) {
                    this->on_open_internal(this->connection->get());
                }
                return res;
            }

#if SQLITE_VERSION_NUMBER >= 3006019
            void foreign_keys(sqlite3* db, bool value) {
                std::stringstream ss;
                ss << "PRAGMA foreign_keys = " << value << std::flush;
                perform_void_exec(db, ss.str());
            }

            bool foreign_keys(sqlite3* db) {
                bool result = false;
                perform_exec(db, "PRAGMA foreign_keys", extract_single_value<bool>, &result);
                return result;
            }

#endif
            void on_open_internal(sqlite3* db) {

#if SQLITE_VERSION_NUMBER >= 3006019
                if(this->cachedForeignKeysCount) {
                    this->foreign_keys(db, true);
                }
#endif
                if(this->pragma._synchronous != -1) {
                    this->pragma.synchronous(this->pragma._synchronous);
                }

                if(this->pragma._journal_mode != -1) {
                    this->pragma.set_pragma("journal_mode", static_cast<journal_mode>(this->pragma._journal_mode), db);
                }

                for(auto& p: this->collatingFunctions) {
                    int rc = sqlite3_create_collation(db, p.first.c_str(), SQLITE_UTF8, &p.second, collate_callback);
                    if(rc != SQLITE_OK) {
                        throw_translated_sqlite_error(db);
                    }
                }

                for(auto& p: this->limit.limits) {
                    sqlite3_limit(db, p.first, p.second);
                }

                if(_busy_handler) {
                    sqlite3_busy_handler(this->connection->get(), busy_handler_callback, this);
                }

                for(auto& udfProxy: this->scalarFunctions) {
                    try_to_create_scalar_function(db, udfProxy);
                }

                for(auto& udfProxy: this->aggregateFunctions) {
                    try_to_create_aggregate_function(db, udfProxy);
                }

                if(this->on_open) {
                    this->on_open(db);
                }
            }

            template<class F>
            void create_scalar_function_impl(udf_holder<F> udfName, std::function<void(void* location)> constructAt) {
                using args_tuple = typename callable_arguments<F>::args_tuple;
                using return_type = typename callable_arguments<F>::return_type;
                constexpr auto argsCount = std::is_same<args_tuple, std::tuple<arg_values>>::value
                                               ? -1
                                               : int(std::tuple_size<args_tuple>::value);
                using is_stateless = std::is_empty<F>;
                auto udfMemorySpace = preallocate_udf_memory<F>();
                if SQLITE_ORM_CONSTEXPR_IF(is_stateless::value) {
                    constructAt(udfMemorySpace.first);
                }
                this->scalarFunctions.emplace_back(
                    udfName(),
                    argsCount,
                    is_stateless::value ? nullptr : std::move(constructAt),
                    /* destroy = */
                    obtain_xdestroy_for<F>(udf_destruct_only_deleter{}),
                    /* call = */
                    [](sqlite3_context* context, int argsCount, sqlite3_value** values) {
                        auto udfPointer = proxy_get_scalar_udf<F>(is_stateless{}, context, argsCount);
                        args_tuple argsTuple = tuple_from_values<args_tuple>{}(values, argsCount);
                        auto result = polyfill::apply(*udfPointer, std::move(argsTuple));
                        statement_binder<return_type>().result(context, result);
                    },
                    udfMemorySpace);

                if(this->connection->retain_count() > 0) {
                    sqlite3* db = this->connection->get();
                    try_to_create_scalar_function(db, this->scalarFunctions.back());
                }
            }

            template<class F>
            void create_aggregate_function_impl(udf_holder<F> udfName,
                                                std::function<void(void* location)> constructAt) {
                using args_tuple = typename callable_arguments<F>::args_tuple;
                using return_type = typename callable_arguments<F>::return_type;
                constexpr auto argsCount = std::is_same<args_tuple, std::tuple<arg_values>>::value
                                               ? -1
                                               : int(std::tuple_size<args_tuple>::value);
                this->aggregateFunctions.emplace_back(
                    udfName(),
                    argsCount,
                    std::move(constructAt),
                    /* destroy = */
                    obtain_xdestroy_for<F>(udf_destruct_only_deleter{}),
                    /* step = */
                    [](sqlite3_context* context, int argsCount, sqlite3_value** values) {
                        F* udfPointer;
                        try {
                            udfPointer = proxy_get_aggregate_step_udf<F>(context, argsCount);
                        } catch(const std::bad_alloc&) {
                            sqlite3_result_error_nomem(context);
                            return;
                        }
                        args_tuple argsTuple = tuple_from_values<args_tuple>{}(values, argsCount);
#if __cpp_lib_bind_front >= 201907L
                        std::apply(std::bind_front(&F::step, udfPointer), std::move(argsTuple));
#else
                        polyfill::apply(
                            [udfPointer](auto&&... args) {
                                udfPointer->step(std::forward<decltype(args)>(args)...);
                            },
                            std::move(argsTuple));
#endif
                    },
                    /* finalCall = */
                    [](void* udfHandle, sqlite3_context* context) {
                        F& udf = *static_cast<F*>(udfHandle);
                        auto result = udf.fin();
                        statement_binder<return_type>().result(context, result);
                    },
                    obtain_udf_allocator<F>());

                if(this->connection->retain_count() > 0) {
                    sqlite3* db = this->connection->get();
                    try_to_create_aggregate_function(db, this->aggregateFunctions.back());
                }
            }

            void delete_function_impl(const std::string& name, std::list<udf_proxy>& functions) const {
#if __cpp_lib_ranges >= 201911L
                auto it = std::ranges::find(functions, name, &udf_proxy::name);
#else
                auto it = std::find_if(functions.begin(), functions.end(), [&name](auto& udfProxy) {
                    return udfProxy.name == name;
                });
#endif
                if(it != functions.end()) {
                    if(this->connection->retain_count() > 0) {
                        sqlite3* db = this->connection->get();
                        int rc = sqlite3_create_function_v2(db,
                                                            name.c_str(),
                                                            it->argumentsCount,
                                                            SQLITE_UTF8,
                                                            nullptr,
                                                            nullptr,
                                                            nullptr,
                                                            nullptr,
                                                            nullptr);
                        if(rc != SQLITE_OK) {
                            throw_translated_sqlite_error(db);
                        }
                    }
                    it = functions.erase(it);
                } else {
                    throw std::system_error{orm_error_code::function_not_found};
                }
            }

            static void try_to_create_scalar_function(sqlite3* db, udf_proxy& udfProxy) {
                int rc = sqlite3_create_function_v2(db,
                                                    udfProxy.name.c_str(),
                                                    udfProxy.argumentsCount,
                                                    SQLITE_UTF8,
                                                    &udfProxy,
                                                    udfProxy.func,
                                                    nullptr,
                                                    nullptr,
                                                    nullptr);
                if(rc != SQLITE_OK) {
                    throw_translated_sqlite_error(db);
                }
            }

            static void try_to_create_aggregate_function(sqlite3* db, udf_proxy& udfProxy) {
                int rc = sqlite3_create_function(db,
                                                 udfProxy.name.c_str(),
                                                 udfProxy.argumentsCount,
                                                 SQLITE_UTF8,
                                                 &udfProxy,
                                                 nullptr,
                                                 udfProxy.func,
                                                 aggregate_function_final_callback);
                if(rc != SQLITE_OK) {
                    throw_translated_sqlite_error(rc);
                }
            }

            std::string current_time(sqlite3* db) {
                std::string result;
                perform_exec(db, "SELECT CURRENT_TIME", extract_single_value<std::string>, &result);
                return result;
            }

            std::string current_date(sqlite3* db) {
                std::string result;
                perform_exec(db, "SELECT CURRENT_DATE", extract_single_value<std::string>, &result);
                return result;
            }

            std::string current_timestamp(sqlite3* db) {
                std::string result;
                perform_exec(db, "SELECT CURRENT_TIMESTAMP", extract_single_value<std::string>, &result);
                return result;
            }

            void drop_table_internal(sqlite3* db, const std::string& tableName) {
                std::stringstream ss;
                ss << "DROP TABLE " << streaming_identifier(tableName) << std::flush;
                perform_void_exec(db, ss.str());
            }

            static int collate_callback(void* arg, int leftLen, const void* lhs, int rightLen, const void* rhs) {
                auto& f = *(collating_function*)arg;
                return f(leftLen, lhs, rightLen, rhs);
            }

            static int busy_handler_callback(void* selfPointer, int triesCount) {
                auto& storage = *static_cast<storage_base*>(selfPointer);
                if(storage._busy_handler) {
                    return storage._busy_handler(triesCount);
                } else {
                    return 0;
                }
            }

            bool calculate_remove_add_columns(std::vector<const table_xinfo*>& columnsToAdd,
                                              std::vector<table_xinfo>& storageTableInfo,
                                              std::vector<table_xinfo>& dbTableInfo) const {
                bool notEqual = false;

                //  iterate through storage columns
                for(size_t storageColumnInfoIndex = 0; storageColumnInfoIndex < storageTableInfo.size();
                    ++storageColumnInfoIndex) {

                    //  get storage's column info
                    table_xinfo& storageColumnInfo = storageTableInfo[storageColumnInfoIndex];
                    const std::string& columnName = storageColumnInfo.name;

                    //  search for a column in db with the same name
#if __cpp_lib_ranges >= 201911L
                    auto dbColumnInfoIt = std::ranges::find(dbTableInfo, columnName, &table_xinfo::name);
#else
                    auto dbColumnInfoIt = std::find_if(dbTableInfo.begin(), dbTableInfo.end(), [&columnName](auto& ti) {
                        return ti.name == columnName;
                    });
#endif
                    if(dbColumnInfoIt != dbTableInfo.end()) {
                        auto& dbColumnInfo = *dbColumnInfoIt;
                        auto columnsAreEqual =
                            dbColumnInfo.name == storageColumnInfo.name &&
                            dbColumnInfo.notnull == storageColumnInfo.notnull &&
                            (!dbColumnInfo.dflt_value.empty()) == (!storageColumnInfo.dflt_value.empty()) &&
                            dbColumnInfo.pk == storageColumnInfo.pk &&
                            (dbColumnInfo.hidden == 0) == (storageColumnInfo.hidden == 0);
                        if(!columnsAreEqual) {
                            notEqual = true;
                            break;
                        }
                        dbTableInfo.erase(dbColumnInfoIt);
                        storageTableInfo.erase(storageTableInfo.begin() +
                                               static_cast<ptrdiff_t>(storageColumnInfoIndex));
                        --storageColumnInfoIndex;
                    } else {
                        columnsToAdd.push_back(&storageColumnInfo);
                    }
                }
                return notEqual;
            }

            const bool inMemory;
            bool isOpenedForever = false;
            std::unique_ptr<connection_holder> connection;
            std::map<std::string, collating_function> collatingFunctions;
            const int cachedForeignKeysCount;
            std::function<int(int)> _busy_handler;
            std::list<udf_proxy> scalarFunctions;
            std::list<udf_proxy> aggregateFunctions;
        };
    }
}

// #include "prepared_statement.h"

// #include "expression_object_type.h"

#include <type_traits>  //  std::decay, std::remove_reference
#include <functional>  //  std::reference_wrapper

// #include "type_traits.h"

// #include "prepared_statement.h"

namespace sqlite_orm {

    namespace internal {

        template<class T, class SFINAE = void>
        struct expression_object_type;

        template<class T>
        using expression_object_type_t = typename expression_object_type<T>::type;

        template<typename S>
        using statement_object_type_t = expression_object_type_t<expression_type_t<std::remove_reference_t<S>>>;

        template<class T>
        struct expression_object_type<update_t<T>, void> : value_unref_type<T> {};

        template<class T>
        struct expression_object_type<replace_t<T>, void> : value_unref_type<T> {};

        template<class T>
        struct expression_object_type<T, match_if<is_replace_range, T>> {
            using type = object_type_t<T>;
        };

        template<class T, class... Ids>
        struct expression_object_type<remove_t<T, Ids...>, void> : value_unref_type<T> {};

        template<class T>
        struct expression_object_type<insert_t<T>, void> : value_unref_type<T> {};

        template<class T>
        struct expression_object_type<T, match_if<is_insert_range, T>> {
            using type = object_type_t<T>;
        };

        template<class T, class... Cols>
        struct expression_object_type<insert_explicit<T, Cols...>, void> : value_unref_type<T> {};

        template<class T>
        struct get_ref_t {

            template<class O>
            auto& operator()(O& t) const {
                return t;
            }
        };

        template<class T>
        struct get_ref_t<std::reference_wrapper<T>> {

            template<class O>
            auto& operator()(O& t) const {
                return t.get();
            }
        };

        template<class T>
        auto& get_ref(T& t) {
            using arg_type = std::decay_t<T>;
            get_ref_t<arg_type> g;
            return g(t);
        }

        template<class T>
        struct get_object_t;

        template<class T>
        struct get_object_t<const T> : get_object_t<T> {};

        template<class T>
        auto& get_object(T& t) {
            using expression_type = std::decay_t<T>;
            get_object_t<expression_type> obj;
            return obj(t);
        }

        template<class T>
        struct get_object_t<replace_t<T>> {
            using expression_type = replace_t<T>;

            template<class O>
            auto& operator()(O& e) const {
                return get_ref(e.object);
            }
        };

        template<class T>
        struct get_object_t<insert_t<T>> {
            using expression_type = insert_t<T>;

            template<class O>
            auto& operator()(O& e) const {
                return get_ref(e.object);
            }
        };

        template<class T>
        struct get_object_t<update_t<T>> {
            using expression_type = update_t<T>;

            template<class O>
            auto& operator()(O& e) const {
                return get_ref(e.object);
            }
        };
    }
}

// #include "statement_serializer.h"

#include <sstream>  //  std::stringstream
#include <string>  //  std::string
#include <type_traits>  //  std::enable_if, std::remove_pointer
#include <vector>  //  std::vector
#ifndef SQLITE_ORM_OMITS_CODECVT
#include <locale>  // std::wstring_convert
#include <codecvt>  //  std::codecvt_utf8_utf16
#endif
#include <memory>
#include <array>
#include <list>  //  std::list
// #include "functional/cxx_string_view.h"

// #include "functional/cxx_optional.h"

// #include "functional/cxx_universal.h"

// #include "functional/cxx_functional_polyfill.h"

// #include "functional/mpl.h"

// #include "tuple_helper/tuple_filter.h"

// #include "ast/upsert_clause.h"

// #include "ast/excluded.h"

// #include "ast/group_by.h"

// #include "ast/into.h"

// #include "ast/match.h"

// #include "ast/rank.h"

namespace sqlite_orm {
    namespace internal {
        struct rank_t {};
    }

    inline internal::rank_t rank() {
        return {};
    }
}

// #include "ast/special_keywords.h"

// #include "core_functions.h"

// #include "constraints.h"

// #include "conditions.h"

// #include "schema/column.h"

// #include "indexed_column.h"

// #include "function.h"

// #include "prepared_statement.h"

// #include "rowid.h"

// #include "pointer_value.h"

// #include "type_printer.h"

// #include "field_printer.h"

// #include "literal.h"

// #include "table_name_collector.h"

// #include "column_names_getter.h"

#include <type_traits>  //  std::is_base_of
#include <string>  //  std::string
#include <vector>  //  std::vector
#include <functional>  //  std::reference_wrapper
#include <system_error>
#include <utility>  //  std::move

// #include "tuple_helper/tuple_traits.h"

// #include "tuple_helper/tuple_iteration.h"

// #include "error_code.h"

// #include "mapped_type_proxy.h"

// #include "alias_traits.h"

// #include "select_constraints.h"

// #include "storage_lookup.h"
//  pick_table
// #include "serializer_context.h"

// #include "util.h"

namespace sqlite_orm {

    namespace internal {

        template<class T, class C>
        auto serialize(const T& t, const C& context);

        template<class T, class Ctx>
        std::vector<std::string>& collect_table_column_names(std::vector<std::string>& collectedExpressions,
                                                             bool definedOrder,
                                                             const Ctx& context) {
            if(definedOrder) {
                auto& table = pick_table<mapped_type_proxy_t<T>>(context.db_objects);
                collectedExpressions.reserve(collectedExpressions.size() + table.template count_of<is_column>());
                table.for_each_column([qualified = !context.skip_table_name,
                                       &tableName = table.name,
                                       &collectedExpressions](const column_identifier& column) {
                    if(is_alias<T>::value) {
                        collectedExpressions.push_back(quote_identifier(alias_extractor<T>::extract()) + "." +
                                                       quote_identifier(column.name));
                    } else if(qualified) {
                        collectedExpressions.push_back(quote_identifier(tableName) + "." +
                                                       quote_identifier(column.name));
                    } else {
                        collectedExpressions.push_back(quote_identifier(column.name));
                    }
                });
            } else {
                collectedExpressions.reserve(collectedExpressions.size() + 1);
                if(is_alias<T>::value) {
                    collectedExpressions.push_back(quote_identifier(alias_extractor<T>::extract()) + ".*");
                } else if(!context.skip_table_name) {
                    const basic_table& table = pick_table<mapped_type_proxy_t<T>>(context.db_objects);
                    collectedExpressions.push_back(quote_identifier(table.name) + ".*");
                } else {
                    collectedExpressions.emplace_back("*");
                }
            }

            return collectedExpressions;
        }

        /** @short Column expression collector.
         */
        struct column_names_getter {
            /** 
             *  The default implementation simply serializes the passed argument.
             */
            template<class E, class Ctx>
            std::vector<std::string>& operator()(const E& t, const Ctx& context) {
                auto columnExpression = serialize(t, context);
                if(columnExpression.empty()) {
                    throw std::system_error{orm_error_code::column_not_found};
                }
                this->collectedExpressions.reserve(this->collectedExpressions.size() + 1);
                this->collectedExpressions.push_back(std::move(columnExpression));
                return this->collectedExpressions;
            }

            template<class T, class Ctx>
            std::vector<std::string>& operator()(const std::reference_wrapper<T>& expression, const Ctx& context) {
                return (*this)(expression.get(), context);
            }

            template<class T, class Ctx>
            std::vector<std::string>& operator()(const asterisk_t<T>& expression, const Ctx& context) {
                return collect_table_column_names<T>(this->collectedExpressions, expression.defined_order, context);
            }

            template<class T, class Ctx>
            std::vector<std::string>& operator()(const object_t<T>& expression, const Ctx& context) {
                return collect_table_column_names<T>(this->collectedExpressions, expression.defined_order, context);
            }

            template<class... Args, class Ctx>
            std::vector<std::string>& operator()(const columns_t<Args...>& cols, const Ctx& context) {
                this->collectedExpressions.reserve(this->collectedExpressions.size() + cols.count);
                iterate_tuple(cols.columns, [this, &context](auto& colExpr) {
                    (*this)(colExpr, context);
                });
                // note: `capacity() > size()` can occur in case `asterisk_t<>` does spell out the columns in defined order
                if(tuple_has_template<typename columns_t<Args...>::columns_type, asterisk_t>::value &&
                   this->collectedExpressions.capacity() > this->collectedExpressions.size()) {
                    this->collectedExpressions.shrink_to_fit();
                }
                return this->collectedExpressions;
            }

            template<class T, class... Args, class Ctx>
            std::vector<std::string>& operator()(const struct_t<T, Args...>& cols, const Ctx& context) {
                this->collectedExpressions.reserve(this->collectedExpressions.size() + cols.count);
                iterate_tuple(cols.columns, [this, &context](auto& colExpr) {
                    (*this)(colExpr, context);
                });
                // note: `capacity() > size()` can occur in case `asterisk_t<>` does spell out the columns in defined order
                if(tuple_has_template<typename struct_t<T, Args...>::columns_type, asterisk_t>::value &&
                   this->collectedExpressions.capacity() > this->collectedExpressions.size()) {
                    this->collectedExpressions.shrink_to_fit();
                }
                return this->collectedExpressions;
            }

            std::vector<std::string> collectedExpressions;
        };

        template<class T, class Ctx>
        std::vector<std::string> get_column_names(const T& t, const Ctx& context) {
            column_names_getter serializer;
            return serializer(t, context);
        }
    }
}

// #include "cte_column_names_collector.h"

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
#include <string>
#include <vector>
#include <functional>  //  std::reference_wrapper
#include <system_error>
#endif

// #include "functional/cxx_universal.h"

// #include "functional/cxx_type_traits_polyfill.h"

// #include "type_traits.h"

// #include "member_traits/member_traits.h"

// #include "error_code.h"

// #include "alias.h"

// #include "select_constraints.h"

// #include "serializer_context.h"

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
namespace sqlite_orm {
    namespace internal {
        // collecting column names utilizes the statement serializer
        template<class T, class C>
        auto serialize(const T& t, const C& context);

        inline void unquote_identifier(std::string& identifier) {
            if(!identifier.empty()) {
                constexpr char quoteChar = '"';
                constexpr char sqlEscaped[] = {quoteChar, quoteChar};
                identifier.erase(identifier.end() - 1);
                identifier.erase(identifier.begin());
                for(size_t pos = 0; (pos = identifier.find(sqlEscaped, pos, 2)) != identifier.npos; ++pos) {
                    identifier.erase(pos, 1);
                }
            }
        }

        inline void unquote_or_erase(std::string& name) {
            constexpr char quoteChar = '"';
            if(name.front() == quoteChar) {
                unquote_identifier(name);
            } else {
                // unaliased expression - see 3. below
                name.clear();
            }
        }

        template<class T, class SFINAE = void>
        struct cte_column_names_collector {
            using expression_type = T;

            // Compound statements are never passed in by db_objects_for_expression()
            static_assert(!is_compound_operator_v<T>);

            template<class Ctx>
            std::vector<std::string> operator()(const expression_type& t, const Ctx& context) const {
                auto newContext = context;
                newContext.skip_table_name = true;
                std::string columnName = serialize(t, newContext);
                if(columnName.empty()) {
                    throw std::system_error{orm_error_code::column_not_found};
                }
                unquote_or_erase(columnName);
                return {std::move(columnName)};
            }
        };

        template<class T, class Ctx>
        std::vector<std::string> get_cte_column_names(const T& t, const Ctx& context) {
            cte_column_names_collector<T> collector;
            return collector(t, context);
        }

        template<class As>
        struct cte_column_names_collector<As, match_specialization_of<As, as_t>> {
            using expression_type = As;

            template<class Ctx>
            std::vector<std::string> operator()(const expression_type& /*expression*/, const Ctx& /*context*/) const {
                return {alias_extractor<alias_type_t<As>>::extract()};
            }
        };

        template<class Wrapper>
        struct cte_column_names_collector<Wrapper, match_specialization_of<Wrapper, std::reference_wrapper>> {
            using expression_type = Wrapper;

            template<class Ctx>
            std::vector<std::string> operator()(const expression_type& expression, const Ctx& context) const {
                return get_cte_column_names(expression.get(), context);
            }
        };

        template<class Asterisk>
        struct cte_column_names_collector<Asterisk, match_specialization_of<Asterisk, asterisk_t>> {
            using expression_type = Asterisk;
            using T = typename Asterisk::type;

            template<class Ctx>
            std::vector<std::string> operator()(const expression_type&, const Ctx& context) const {
                auto& table = pick_table<T>(context.db_objects);

                std::vector<std::string> columnNames;
                columnNames.reserve(size_t(table.template count_of<is_column>()));

                table.for_each_column([&columnNames](const column_identifier& column) {
                    columnNames.push_back(column.name);
                });
                return columnNames;
            }
        };

        // No CTE for object expressions.
        template<class Object>
        struct cte_column_names_collector<Object, match_specialization_of<Object, object_t>> {
            static_assert(polyfill::always_false_v<Object>, "Selecting an object in a subselect is not allowed.");
        };

        // No CTE for object expressions.
        template<class Object>
        struct cte_column_names_collector<Object, match_if<is_struct, Object>> {
            static_assert(polyfill::always_false_v<Object>, "Repacking columns in a subselect is not allowed.");
        };

        template<class Columns>
        struct cte_column_names_collector<Columns, match_specialization_of<Columns, columns_t>> {
            using expression_type = Columns;

            template<class Ctx>
            std::vector<std::string> operator()(const expression_type& cols, const Ctx& context) const {
                std::vector<std::string> columnNames;
                columnNames.reserve(size_t(cols.count));
                auto newContext = context;
                newContext.skip_table_name = true;
                iterate_tuple(cols.columns, [&columnNames, &newContext](auto& m) {
                    using value_type = polyfill::remove_cvref_t<decltype(m)>;

                    if constexpr(polyfill::is_specialization_of_v<value_type, as_t>) {
                        columnNames.push_back(alias_extractor<alias_type_t<value_type>>::extract());
                    } else {
                        std::string columnName = serialize(m, newContext);
                        if(!columnName.empty()) {
                            columnNames.push_back(std::move(columnName));
                        } else {
                            throw std::system_error{orm_error_code::column_not_found};
                        }
                        unquote_or_erase(columnNames.back());
                    }
                });
                return columnNames;
            }
        };

        template<typename Ctx, typename E, typename ExplicitColRefs, satisfies_is_specialization_of<E, select_t> = true>
        std::vector<std::string>
        collect_cte_column_names(const E& sel, const ExplicitColRefs& explicitColRefs, const Ctx& context) {
            // 1. determine column names from subselect
            std::vector<std::string> columnNames = get_cte_column_names(sel.col, context);

            // 2. override column names from cte expression
            if(size_t n = std::tuple_size_v<ExplicitColRefs>) {
                if(n != columnNames.size()) {
                    throw std::system_error{orm_error_code::column_not_found};
                }

                size_t idx = 0;
                iterate_tuple(explicitColRefs, [&idx, &columnNames, &context](auto& colRef) {
                    using ColRef = polyfill::remove_cvref_t<decltype(colRef)>;

                    if constexpr(polyfill::is_specialization_of_v<ColRef, alias_holder>) {
                        columnNames[idx] = alias_extractor<type_t<ColRef>>::extract();
                    } else if constexpr(std::is_member_pointer<ColRef>::value) {
                        using O = table_type_of_t<ColRef>;
                        if(auto* columnName = find_column_name<O>(context.db_objects, colRef)) {
                            columnNames[idx] = *columnName;
                        } else {
                            // relaxed: allow any member pointer as column reference
                            columnNames[idx] = typeid(ColRef).name();
                        }
                    } else if constexpr(polyfill::is_specialization_of_v<ColRef, column_t>) {
                        columnNames[idx] = colRef.name;
                    } else if constexpr(std::is_same_v<ColRef, std::string>) {
                        if(!colRef.empty()) {
                            columnNames[idx] = colRef;
                        }
                    } else if constexpr(std::is_same_v<ColRef, polyfill::remove_cvref_t<decltype(std::ignore)>>) {
                        if(columnNames[idx].empty()) {
                            columnNames[idx] = std::to_string(idx + 1);
                        }
                    } else {
                        static_assert(polyfill::always_false_v<ColRef>, "Invalid explicit column reference specified");
                    }
                    ++idx;
                });
            }

            // 3. fill in blanks with numerical column identifiers
            {
                for(size_t i = 0, n = columnNames.size(); i < n; ++i) {
                    if(columnNames[i].empty()) {
                        columnNames[i] = std::to_string(i + 1);
                    }
                }
            }

            return columnNames;
        }
    }
}
#endif

// #include "order_by_serializer.h"

#include <string>  //  std::string
#include <sstream>  //  std::stringstream

namespace sqlite_orm {

    namespace internal {

        template<class T, class SFINAE = void>
        struct order_by_serializer;

        template<class T, class Ctx>
        std::string serialize_order_by(const T& t, const Ctx& context) {
            order_by_serializer<T> serializer;
            return serializer(t, context);
        }

        template<class O>
        struct order_by_serializer<order_by_t<O>, void> {
            using statement_type = order_by_t<O>;

            template<class Ctx>
            std::string operator()(const statement_type& orderBy, const Ctx& context) const {
                std::stringstream ss;
                auto newContext = context;
                newContext.skip_table_name = false;

                ss << serialize(orderBy.expression, newContext);
                if(!orderBy._collate_argument.empty()) {
                    ss << " COLLATE " << orderBy._collate_argument;
                }
                switch(orderBy.asc_desc) {
                    case 1:
                        ss << " ASC";
                        break;
                    case -1:
                        ss << " DESC";
                        break;
                }
                return ss.str();
            }
        };

        template<class C>
        struct order_by_serializer<dynamic_order_by_t<C>, void> {
            using statement_type = dynamic_order_by_t<C>;

            template<class Ctx>
            std::string operator()(const statement_type& orderBy, const Ctx&) const {
                std::stringstream ss;
                ss << static_cast<std::string>(orderBy) << " ";
                int index = 0;
                for(const dynamic_order_by_entry_t& entry: orderBy) {
                    if(index > 0) {
                        ss << ", ";
                    }

                    ss << entry.name;
                    if(!entry._collate_argument.empty()) {
                        ss << " COLLATE " << entry._collate_argument;
                    }
                    switch(entry.asc_desc) {
                        case 1:
                            ss << " ASC";
                            break;
                        case -1:
                            ss << " DESC";
                            break;
                    }
                    ++index;
                };
                return ss.str();
            }
        };

    }
}

// #include "serializing_util.h"

// #include "serialize_result_type.h"

// #include "statement_binder.h"

// #include "values.h"

// #include "schema/triggers.h"

// #include "table_type_of.h"

// #include "schema/index.h"

// #include "schema/table.h"

// #include "util.h"

// #include "error_code.h"

namespace sqlite_orm {

    namespace internal {

        template<class T, class SFINAE = void>
        struct statement_serializer;

        template<class T, class C>
        auto serialize(const T& t, const C& context) {
            statement_serializer<T> serializer;
            return serializer(t, context);
        }

        /**
         *  Serializer for bindable types.
         */
        template<class T>
        struct statement_serializer<T, match_if<is_bindable, T>> {
            using statement_type = T;

            template<class Ctx>
            std::string operator()(const T& statement, const Ctx& context) const {
                if(context.replace_bindable_with_question) {
                    return "?";
                } else {
                    return this->do_serialize(statement);
                }
            }

          private:
            template<class X,
                     std::enable_if_t<is_printable<X>::value && !std::is_base_of<std::string, X>::value
#ifndef SQLITE_ORM_OMITS_CODECVT
                                          && !std::is_base_of<std::wstring, X>::value
#endif
                                      ,
                                      bool> = true>
            std::string do_serialize(const X& c) const {
                static_assert(std::is_same<X, T>::value, "");

                // implementation detail: utilizing field_printer
                return field_printer<X>{}(c);
            }

            std::string do_serialize(const std::string& c) const {
                // implementation detail: utilizing field_printer
                return quote_string_literal(field_printer<std::string>{}(c));
            }

            std::string do_serialize(const char* c) const {
                return quote_string_literal(c);
            }
#ifndef SQLITE_ORM_OMITS_CODECVT
            std::string do_serialize(const std::wstring& c) const {
                // implementation detail: utilizing field_printer
                return quote_string_literal(field_printer<std::wstring>{}(c));
            }

            std::string do_serialize(const wchar_t* c) const {
                std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
                return quote_string_literal(converter.to_bytes(c));
            }
#endif
#ifdef SQLITE_ORM_STRING_VIEW_SUPPORTED
            std::string do_serialize(const std::string_view& c) const {
                return quote_string_literal(std::string(c));
            }
#ifndef SQLITE_ORM_OMITS_CODECVT
            std::string do_serialize(const std::wstring_view& c) const {
                std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
                return quote_string_literal(converter.to_bytes(c.data(), c.data() + c.size()));
            }
#endif
#endif
            /**
             *  Specialization for binary data (std::vector<char>).
             */
            std::string do_serialize(const std::vector<char>& t) const {
                return quote_blob_literal(field_printer<std::vector<char>>{}(t));
            }

#if SQLITE_VERSION_NUMBER >= 3020000
            template<class P, class PT, class D>
            std::string do_serialize(const pointer_binding<P, PT, D>&) const {
                // always serialize null (security reasons)
                return field_printer<nullptr_t>{}(nullptr);
            }
#endif
        };

        template<class O, bool WithoutRowId, class... Cs>
        struct statement_serializer<table_t<O, WithoutRowId, Cs...>, void> {
            using statement_type = table_t<O, WithoutRowId, Cs...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) {
                return this->serialize(statement, context, statement.name);
            }

            template<class Ctx>
            auto serialize(const statement_type& statement, const Ctx& context, const std::string& tableName) {
                std::stringstream ss;
                ss << "CREATE TABLE " << streaming_identifier(tableName) << " ("
                   << streaming_expressions_tuple(statement.elements, context) << ")";
                if(statement_type::is_without_rowid_v) {
                    ss << " WITHOUT ROWID";
                }
                return ss.str();
            }
        };

        template<>
        struct statement_serializer<current_time_t, void> {
            using statement_type = current_time_t;

            template<class Ctx>
            std::string operator()(const statement_type& /*statement*/, const Ctx& /*context*/) {
                return "CURRENT_TIME";
            }
        };

        template<>
        struct statement_serializer<current_date_t, void> {
            using statement_type = current_date_t;

            template<class Ctx>
            std::string operator()(const statement_type& /*statement*/, const Ctx& /*context*/) {
                return "CURRENT_DATE";
            }
        };

        template<>
        struct statement_serializer<current_timestamp_t, void> {
            using statement_type = current_timestamp_t;

            template<class Ctx>
            std::string operator()(const statement_type& /*statement*/, const Ctx& /*context*/) {
                return "CURRENT_TIMESTAMP";
            }
        };

        template<class T, class X, class Y, class Z>
        struct statement_serializer<highlight_t<T, X, Y, Z>, void> {
            using statement_type = highlight_t<T, X, Y, Z>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) {
                std::stringstream ss;
                auto& tableName = lookup_table_name<T>(context.db_objects);
                ss << "HIGHLIGHT (" << streaming_identifier(tableName);
                ss << ", " << serialize(statement.argument0, context);
                ss << ", " << serialize(statement.argument1, context);
                ss << ", " << serialize(statement.argument2, context) << ")";
                return ss.str();
            }
        };

        /**
         *  Serializer for literal values.
         */
        template<class T>
        struct statement_serializer<T, match_specialization_of<T, literal_holder>> {
            using statement_type = T;

            template<class Ctx>
            std::string operator()(const statement_type& literal, const Ctx& context) const {
                static_assert(is_bindable_v<type_t<statement_type>>, "A literal value must be also bindable");

                Ctx literalCtx = context;
                literalCtx.replace_bindable_with_question = false;
                statement_serializer<type_t<statement_type>> serializer{};
                return serializer(literal.value, literalCtx);
            }
        };

        template<class F, class W>
        struct statement_serializer<filtered_aggregate_function<F, W>, void> {
            using statement_type = filtered_aggregate_function<F, W>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) {
                std::stringstream ss;
                ss << serialize(statement.function, context);
                ss << " FILTER (WHERE " << serialize(statement.where, context) << ")";
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<excluded_t<T>, void> {
            using statement_type = excluded_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << "excluded.";
                if(auto* columnName = find_column_name(context.db_objects, statement.expression)) {
                    ss << streaming_identifier(*columnName);
                } else {
                    throw std::system_error{orm_error_code::column_not_found};
                }
                return ss.str();
            }
        };
#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
        template<class T>
        struct statement_serializer<as_optional_t<T>, void> {
            using statement_type = as_optional_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                return serialize(statement.value, context);
            }
        };
#endif  //  SQLITE_ORM_OPTIONAL_SUPPORTED
        template<class T>
        struct statement_serializer<std::reference_wrapper<T>, void> {
            using statement_type = std::reference_wrapper<T>;

            template<class Ctx>
            std::string operator()(const statement_type& s, const Ctx& context) const {
                return serialize(s.get(), context);
            }
        };

        template<class T>
        struct statement_serializer<alias_holder<T>, void> {
            using statement_type = alias_holder<T>;

            template<class Ctx>
            std::string operator()(const statement_type&, const Ctx&) {
                std::stringstream ss;
                ss << streaming_identifier(T::get());
                return ss.str();
            }
        };

        template<class T, class X>
        struct statement_serializer<match_t<T, X>, void> {
            using statement_type = match_t<T, X>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                auto& table = pick_table<T>(context.db_objects);
                std::stringstream ss;
                ss << streaming_identifier(table.name) << " MATCH " << serialize(statement.argument, context);
                return ss.str();
            }
        };

        template<char... C>
        struct statement_serializer<column_alias<C...>, void> {
            using statement_type = column_alias<C...>;

            template<class Ctx>
            std::string operator()(const statement_type&, const Ctx&) {
                std::stringstream ss;
                ss << streaming_identifier(statement_type::get());
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<T, match_if<is_upsert_clause, T>> {
            using statement_type = T;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << "ON CONFLICT";
                iterate_tuple(statement.target_args, [&ss, &context](auto& value) {
                    using value_type = std::decay_t<decltype(value)>;
                    auto needParenthesis = std::is_member_pointer<value_type>::value;
                    ss << ' ';
                    if(needParenthesis) {
                        ss << '(';
                    }
                    ss << serialize(value, context);
                    if(needParenthesis) {
                        ss << ')';
                    }
                });
                ss << ' ' << "DO";
                if(std::tuple_size<typename statement_type::actions_tuple>::value == 0) {
                    ss << " NOTHING";
                } else {
                    auto updateContext = context;
                    updateContext.use_parentheses = false;
                    ss << " UPDATE " << streaming_actions_tuple(statement.actions, updateContext);
                }
                return ss.str();
            }
        };

        template<class R, class S, class... Args>
        struct statement_serializer<built_in_function_t<R, S, Args...>, void> {
            using statement_type = built_in_function_t<R, S, Args...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << statement.serialize() << "(" << streaming_expressions_tuple(statement.args, context) << ")";
                return ss.str();
            }
        };

        template<class R, class S, class... Args>
        struct statement_serializer<built_in_aggregate_function_t<R, S, Args...>, void>
            : statement_serializer<built_in_function_t<R, S, Args...>, void> {};

        template<class F, class... CallArgs>
        struct statement_serializer<function_call<F, CallArgs...>, void> {
            using statement_type = function_call<F, CallArgs...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                stream_identifier(ss, "", statement.name(), "");
                ss << "(" << streaming_expressions_tuple(statement.callArgs, context) << ")";
                return ss.str();
            }
        };

        template<class T, class E>
        struct statement_serializer<as_t<T, E>, void> {
            using statement_type = as_t<T, E>;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                std::stringstream ss;
                ss << serialize(c.expression, context) + " AS " << streaming_identifier(alias_extractor<T>::extract());
                return ss.str();
            }
        };

        template<class T, class P>
        struct statement_serializer<alias_column_t<T, P>, void> {
            using statement_type = alias_column_t<T, P>;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                std::stringstream ss;
                if(!context.skip_table_name) {
                    ss << streaming_identifier(alias_extractor<T>::extract()) << ".";
                }
                auto newContext = context;
                newContext.skip_table_name = true;
                ss << serialize(c.column, newContext);
                return ss.str();
            }
        };

        template<class E>
        struct statement_serializer<
            E,
            std::enable_if_t<polyfill::disjunction<std::is_member_pointer<E>, is_column_pointer<E>>::value>> {
            using statement_type = E;

            template<class Ctx>
            std::string operator()(const statement_type& e, const Ctx& context) const {
                std::stringstream ss;
                if(auto* columnName = find_column_name(context.db_objects, e)) {
                    ss << streaming_identifier(
                        !context.skip_table_name ? lookup_table_name<table_type_of_t<E>>(context.db_objects) : "",
                        *columnName,
                        "");
                } else {
                    throw std::system_error{orm_error_code::column_not_found};
                }
                return ss.str();
            }
        };

        template<>
        struct statement_serializer<rank_t, void> {
            using statement_type = rank_t;

            template<class Ctx>
            serialize_result_type operator()(const statement_type& /*statement*/, const Ctx&) const {
                return "rank";
            }
        };

        template<>
        struct statement_serializer<rowid_t, void> {
            using statement_type = rowid_t;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx&) const {
                return static_cast<std::string>(statement);
            }
        };

        template<>
        struct statement_serializer<oid_t, void> {
            using statement_type = oid_t;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx&) const {
                return static_cast<std::string>(statement);
            }
        };

        template<>
        struct statement_serializer<_rowid_t, void> {
            using statement_type = _rowid_t;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx&) const {
                return static_cast<std::string>(statement);
            }
        };

        template<class O>
        struct statement_serializer<table_rowid_t<O>, void> {
            using statement_type = table_rowid_t<O>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                if(!context.skip_table_name) {
                    ss << streaming_identifier(lookup_table_name<O>(context.db_objects)) << ".";
                }
                ss << static_cast<std::string>(statement);
                return ss.str();
            }
        };

        template<class O>
        struct statement_serializer<table_oid_t<O>, void> {
            using statement_type = table_oid_t<O>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                if(!context.skip_table_name) {
                    ss << streaming_identifier(lookup_table_name<O>(context.db_objects)) << ".";
                }
                ss << static_cast<std::string>(statement);
                return ss.str();
            }
        };

        template<class O>
        struct statement_serializer<table__rowid_t<O>, void> {
            using statement_type = table__rowid_t<O>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                if(!context.skip_table_name) {
                    ss << streaming_identifier(lookup_table_name<O>(context.db_objects)) << ".";
                }
                ss << static_cast<std::string>(statement);
                return ss.str();
            }
        };

        template<class L, class R>
        struct statement_serializer<is_equal_with_table_t<L, R>, void> {
            using statement_type = is_equal_with_table_t<L, R>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                const auto tableName = lookup_table_name<L>(context.db_objects);
                ss << streaming_identifier(tableName);
                ss << " = ";
                ss << serialize(statement.rhs, context);
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<count_asterisk_t<T>, void> {
            using statement_type = count_asterisk_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type&, const Ctx& context) const {
                return serialize(count_asterisk_without_type{}, context);
            }
        };

        template<>
        struct statement_serializer<count_asterisk_without_type, void> {
            using statement_type = count_asterisk_without_type;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx&) const {
                std::stringstream ss;
                auto functionName = c.serialize();
                ss << functionName << "(*)";
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<distinct_t<T>, void> {
            using statement_type = distinct_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                std::stringstream ss;
                auto expr = serialize(c.value, context);
                ss << static_cast<std::string>(c) << "(" << expr << ")";
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<all_t<T>, void> {
            using statement_type = all_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                std::stringstream ss;
                auto expr = serialize(c.value, context);
                ss << static_cast<std::string>(c) << "(" << expr << ")";
                return ss.str();
            }
        };

        template<class T, class E>
        struct statement_serializer<cast_t<T, E>, void> {
            using statement_type = cast_t<T, E>;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                std::stringstream ss;
                ss << static_cast<std::string>(c) << " (";
                ss << serialize(c.expression, context) << " AS " << type_printer<T>().print() << ")";
                return ss.str();
            }
        };

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
#if SQLITE_VERSION_NUMBER >= 3035003
#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
        template<>
        struct statement_serializer<materialized_t, void> {
            using statement_type = materialized_t;

            template<class Ctx>
            std::string_view operator()(const statement_type& /*statement*/, const Ctx& /*context*/) const {
                return "MATERIALIZED";
            }
        };

        template<>
        struct statement_serializer<not_materialized_t, void> {
            using statement_type = not_materialized_t;

            template<class Ctx>
            std::string_view operator()(const statement_type& /*statement*/, const Ctx& /*context*/) const {
                return "NOT MATERIALIZED";
            }
        };
#endif
#endif

        template<class CTE>
        struct statement_serializer<CTE, match_specialization_of<CTE, common_table_expression>> {
            using statement_type = CTE;

            template<class Ctx>
            std::string operator()(const statement_type& cte, const Ctx& context) const {
                // A CTE always starts a new 'highest level' context
                Ctx cteContext = context;
                cteContext.use_parentheses = false;

                std::stringstream ss;
                ss << streaming_identifier(alias_extractor<cte_moniker_type_t<CTE>>::extract());
                {
                    std::vector<std::string> columnNames =
                        collect_cte_column_names(get_cte_driving_subselect(cte.subselect),
                                                 cte.explicitColumns,
                                                 context);
                    ss << '(' << streaming_identifiers(columnNames) << ')';
                }
                ss << " AS" << streaming_constraints_tuple(cte.hints, context) << " ("
                   << serialize(cte.subselect, cteContext) << ')';
                return ss.str();
            }
        };

        template<class With>
        struct statement_serializer<With, match_specialization_of<With, with_t>> {
            using statement_type = With;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                Ctx tupleContext = context;
                tupleContext.use_parentheses = false;

                std::stringstream ss;
                ss << "WITH";
                if(c.recursiveIndicated) {
                    ss << " RECURSIVE";
                }
                ss << " " << serialize(c.cte, tupleContext);
                ss << " " << serialize(c.expression, context);
                return ss.str();
            }
        };
#endif

        template<class T>
        struct statement_serializer<T, match_if<is_compound_operator, T>> {
            using statement_type = T;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                std::stringstream ss;
                ss << streaming_compound_expressions(c.compound, static_cast<std::string>(c), context);
                return ss.str();
            }
        };

        template<class R, class T, class E, class... Args>
        struct statement_serializer<simple_case_t<R, T, E, Args...>, void> {
            using statement_type = simple_case_t<R, T, E, Args...>;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                std::stringstream ss;
                ss << "CASE ";
                c.case_expression.apply([&ss, context](auto& c_) {
                    ss << serialize(c_, context) << " ";
                });
                iterate_tuple(c.args, [&ss, context](auto& pair) {
                    ss << "WHEN " << serialize(pair.first, context) << " ";
                    ss << "THEN " << serialize(pair.second, context) << " ";
                });
                c.else_expression.apply([&ss, context](auto& el) {
                    ss << "ELSE " << serialize(el, context) << " ";
                });
                ss << "END";
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<is_null_t<T>, void> {
            using statement_type = is_null_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                std::stringstream ss;
                ss << serialize(c.t, context) << " " << static_cast<std::string>(c);
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<is_not_null_t<T>, void> {
            using statement_type = is_not_null_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                std::stringstream ss;
                ss << serialize(c.t, context) << " " << static_cast<std::string>(c);
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<bitwise_not_t<T>, void> {
            using statement_type = bitwise_not_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << statement.serialize() << " ";
                auto cString = serialize(statement.argument, context);
                ss << " (" << cString << " )";
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<negated_condition_t<T>, void> {
            using statement_type = negated_condition_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                std::stringstream ss;
                ss << static_cast<std::string>(c) << " ";
                auto cString = serialize(c.c, context);
                ss << " (" << cString << " )";
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<
            T,
            std::enable_if_t<polyfill::disjunction<is_binary_condition<T>, is_binary_operator<T>>::value>> {
            using statement_type = T;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                // subqueries should always use parentheses in binary expressions
                auto subCtx = context;
                subCtx.use_parentheses = true;
                // parentheses for sub-trees to ensure the order of precedence
                constexpr bool parenthesizeLeft = is_binary_condition<left_type_t<statement_type>>::value ||
                                                  is_binary_operator<left_type_t<statement_type>>::value;
                constexpr bool parenthesizeRight = is_binary_condition<right_type_t<statement_type>>::value ||
                                                   is_binary_operator<right_type_t<statement_type>>::value;

                std::stringstream ss;
                if SQLITE_ORM_CONSTEXPR_IF(parenthesizeLeft) {
                    ss << "(";
                }
                ss << serialize(statement.lhs, subCtx);
                if SQLITE_ORM_CONSTEXPR_IF(parenthesizeLeft) {
                    ss << ")";
                }
                ss << " " << statement.serialize() << " ";
                if SQLITE_ORM_CONSTEXPR_IF(parenthesizeRight) {
                    ss << "(";
                }
                ss << serialize(statement.rhs, subCtx);
                if SQLITE_ORM_CONSTEXPR_IF(parenthesizeRight) {
                    ss << ")";
                }
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<named_collate<T>, void> {
            using statement_type = named_collate<T>;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                auto newContext = context;
                newContext.use_parentheses = false;
                auto res = serialize(c.expr, newContext);
                return res + " " + static_cast<std::string>(c);
            }
        };

        template<class T>
        struct statement_serializer<collate_t<T>, void> {
            using statement_type = collate_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                auto newContext = context;
                newContext.use_parentheses = false;
                auto res = serialize(c.expr, newContext);
                return res + " " + static_cast<std::string>(c);
            }
        };

        template<class L, class C>
        struct statement_serializer<
            dynamic_in_t<L, C>,
            std::enable_if_t<!polyfill::disjunction<polyfill::is_specialization_of<C, std::vector>,
                                                    polyfill::is_specialization_of<C, std::list>>::value>> {
            using statement_type = dynamic_in_t<L, C>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                auto leftString = serialize(statement.left, context);
                ss << leftString << " ";
                if(!statement.negative) {
                    ss << "IN";
                } else {
                    ss << "NOT IN";
                }
                ss << " ";
                if(is_compound_operator<C>::value) {
                    ss << '(';
                }
                auto newContext = context;
                newContext.use_parentheses = true;
                ss << serialize(statement.argument, newContext);
                if(is_compound_operator<C>::value) {
                    ss << ')';
                }
                return ss.str();
            }
        };

        template<class L, class C>
        struct statement_serializer<
            dynamic_in_t<L, C>,
            std::enable_if_t<polyfill::disjunction<polyfill::is_specialization_of<C, std::vector>,
                                                   polyfill::is_specialization_of<C, std::list>>::value>> {
            using statement_type = dynamic_in_t<L, C>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                auto leftString = serialize(statement.left, context);
                ss << leftString << " ";
                if(!statement.negative) {
                    ss << "IN";
                } else {
                    ss << "NOT IN";
                }
                ss << " (" << streaming_dynamic_expressions(statement.argument, context) << ")";
                return ss.str();
            }
        };

        template<class L, class... Args>
        struct statement_serializer<in_t<L, Args...>, void> {
            using statement_type = in_t<L, Args...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                auto leftString = serialize(statement.left, context);
                ss << leftString << " ";
                if(!statement.negative) {
                    ss << "IN";
                } else {
                    ss << "NOT IN";
                }
                ss << " ";
                using args_type = std::tuple<Args...>;
                constexpr bool theOnlySelect =
                    std::tuple_size<args_type>::value == 1 && is_select<std::tuple_element_t<0, args_type>>::value;
                if(!theOnlySelect) {
                    ss << "(";
                }
                ss << streaming_expressions_tuple(statement.argument, context);
                if(!theOnlySelect) {
                    ss << ")";
                }
                return ss.str();
            }
        };

        template<class A, class T, class E>
        struct statement_serializer<like_t<A, T, E>, void> {
            using statement_type = like_t<A, T, E>;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                std::stringstream ss;
                ss << serialize(c.arg, context) << " ";
                ss << static_cast<std::string>(c) << " ";
                ss << serialize(c.pattern, context);
                c.arg3.apply([&ss, &context](auto& value) {
                    ss << " ESCAPE " << serialize(value, context);
                });
                return ss.str();
            }
        };

        template<class A, class T>
        struct statement_serializer<glob_t<A, T>, void> {
            using statement_type = glob_t<A, T>;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                std::stringstream ss;
                ss << serialize(c.arg, context) << " ";
                ss << static_cast<std::string>(c) << " ";
                ss << serialize(c.pattern, context);
                return ss.str();
            }
        };

        template<class A, class T>
        struct statement_serializer<between_t<A, T>, void> {
            using statement_type = between_t<A, T>;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                std::stringstream ss;
                auto expr = serialize(c.expr, context);
                ss << expr << " " << static_cast<std::string>(c) << " ";
                ss << serialize(c.b1, context);
                ss << " AND ";
                ss << serialize(c.b2, context);
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<exists_t<T>, void> {
            using statement_type = exists_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                auto newContext = context;
                newContext.use_parentheses = true;
                ss << "EXISTS " << serialize(statement.expression, newContext);
                return ss.str();
            }
        };

        template<>
        struct statement_serializer<conflict_clause_t, void> {
            using statement_type = conflict_clause_t;

            template<class Ctx>
            serialize_result_type operator()(const statement_type& statement, const Ctx&) const {
                switch(statement) {
                    case conflict_clause_t::rollback:
                        return "ROLLBACK";
                    case conflict_clause_t::abort:
                        return "ABORT";
                    case conflict_clause_t::fail:
                        return "FAIL";
                    case conflict_clause_t::ignore:
                        return "IGNORE";
                    case conflict_clause_t::replace:
                        return "REPLACE";
                }
                return {};
            }
        };

        template<class PK>
        struct statement_serializer<primary_key_with_autoincrement<PK>, void> {
            using statement_type = primary_key_with_autoincrement<PK>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                return serialize(statement.as_base(), context) + " AUTOINCREMENT";
            }
        };

        template<>
        struct statement_serializer<null_t, void> {
            using statement_type = null_t;

            template<class Ctx>
            serialize_result_type operator()(const statement_type& /*statement*/, const Ctx& /*context*/) const {
                return "NULL";
            }
        };

        template<>
        struct statement_serializer<not_null_t, void> {
            using statement_type = not_null_t;

            template<class Ctx>
            serialize_result_type operator()(const statement_type& /*statement*/, const Ctx& /*context*/) const {
                return "NOT NULL";
            }
        };

        template<class... Cs>
        struct statement_serializer<primary_key_t<Cs...>, void> {
            using statement_type = primary_key_t<Cs...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << "PRIMARY KEY";
                switch(statement.options.asc_option) {
                    case statement_type::order_by::ascending:
                        ss << " ASC";
                        break;
                    case statement_type::order_by::descending:
                        ss << " DESC";
                        break;
                    default:
                        break;
                }
                if(statement.options.conflict_clause_is_on) {
                    ss << " ON CONFLICT " << serialize(statement.options.conflict_clause, context);
                }
                using columns_tuple = typename statement_type::columns_tuple;
                const size_t columnsCount = std::tuple_size<columns_tuple>::value;
                if(columnsCount) {
                    ss << "(" << streaming_mapped_columns_expressions(statement.columns, context) << ")";
                }
                return ss.str();
            }
        };

        template<class... Args>
        struct statement_serializer<unique_t<Args...>, void> {
            using statement_type = unique_t<Args...>;

            template<class Ctx>
            std::string operator()(const statement_type& c, const Ctx& context) const {
                std::stringstream ss;
                ss << static_cast<std::string>(c);
                using columns_tuple = typename statement_type::columns_tuple;
                const size_t columnsCount = std::tuple_size<columns_tuple>::value;
                if(columnsCount) {
                    ss << "(" << streaming_mapped_columns_expressions(c.columns, context) << ")";
                }
                return ss.str();
            }
        };

#if SQLITE_VERSION_NUMBER >= 3009000
        template<>
        struct statement_serializer<unindexed_t, void> {
            using statement_type = unindexed_t;

            template<class Ctx>
            serialize_result_type operator()(const statement_type& /*statement*/, const Ctx& /*context*/) const {
                return "UNINDEXED";
            }
        };

        template<class T>
        struct statement_serializer<prefix_t<T>, void> {
            using statement_type = prefix_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << "prefix=" << serialize(statement.value, context);
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<tokenize_t<T>, void> {
            using statement_type = tokenize_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << "tokenize = " << serialize(statement.value, context);
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<content_t<T>, void> {
            using statement_type = content_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << "content=" << serialize(statement.value, context);
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<table_content_t<T>, void> {
            using statement_type = table_content_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& /*statement*/, const Ctx& context) const {
                using mapped_type = typename statement_type::mapped_type;

                auto& table = pick_table<mapped_type>(context.db_objects);

                std::stringstream ss;
                ss << "content=" << streaming_identifier(table.name);
                return ss.str();
            }
        };
#endif

        template<>
        struct statement_serializer<collate_constraint_t, void> {
            using statement_type = collate_constraint_t;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx&) const {
                return static_cast<std::string>(statement);
            }
        };

        template<class T>
        struct statement_serializer<default_t<T>, void> {
            using statement_type = default_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                return static_cast<std::string>(statement) + " (" + serialize(statement.value, context) + ")";
            }
        };

#if SQLITE_VERSION_NUMBER >= 3006019
        template<class... Cs, class... Rs>
        struct statement_serializer<foreign_key_t<std::tuple<Cs...>, std::tuple<Rs...>>, void> {
            using statement_type = foreign_key_t<std::tuple<Cs...>, std::tuple<Rs...>>;

            template<class Ctx>
            std::string operator()(const statement_type& fk, const Ctx& context) const {
                std::stringstream ss;
                ss << "FOREIGN KEY(" << streaming_mapped_columns_expressions(fk.columns, context) << ") REFERENCES ";
                {
                    using references_type_t = typename std::decay_t<decltype(fk)>::references_type;
                    using first_reference_t = std::tuple_element_t<0, references_type_t>;
                    using first_reference_mapped_type = table_type_of_t<first_reference_t>;
                    auto refTableName = lookup_table_name<first_reference_mapped_type>(context.db_objects);
                    ss << streaming_identifier(refTableName);
                }
                ss << "(" << streaming_mapped_columns_expressions(fk.references, context) << ")";
                if(fk.on_update) {
                    ss << ' ' << static_cast<std::string>(fk.on_update) << " " << fk.on_update._action;
                }
                if(fk.on_delete) {
                    ss << ' ' << static_cast<std::string>(fk.on_delete) << " " << fk.on_delete._action;
                }
                return ss.str();
            }
        };
#endif

        template<class T>
        struct statement_serializer<check_t<T>, void> {
            using statement_type = check_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << "CHECK (" << serialize(statement.expression, context) << ")";
                return ss.str();
            }
        };
#if SQLITE_VERSION_NUMBER >= 3031000
        template<class T>
        struct statement_serializer<generated_always_t<T>, void> {
            using statement_type = generated_always_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                if(statement.full) {
                    ss << "GENERATED ALWAYS ";
                }
                ss << "AS (";
                ss << serialize(statement.expression, context) << ")";
                switch(statement.storage) {
                    case basic_generated_always::storage_type::not_specified:
                        //..
                        break;
                    case basic_generated_always::storage_type::virtual_:
                        ss << " VIRTUAL";
                        break;
                    case basic_generated_always::storage_type::stored:
                        ss << " STORED";
                        break;
                }
                return ss.str();
            }
        };
#endif
        template<class G, class S, class... Op>
        struct statement_serializer<column_t<G, S, Op...>, void> {
            using statement_type = column_t<G, S, Op...>;

            template<class Ctx>
            std::string operator()(const statement_type& column, const Ctx& context) const {
                std::stringstream ss;
                ss << streaming_identifier(column.name);
                if(!context.fts5_columns) {
                    ss << " " << type_printer<field_type_t<column_field<G, S>>>().print();
                }
                ss << streaming_column_constraints(
                    call_as_template_base<column_constraints>(polyfill::identity{})(column),
                    column.is_not_null(),
                    context);
                return ss.str();
            }
        };

        template<class T, class... Args>
        struct statement_serializer<remove_all_t<T, Args...>, void> {
            using statement_type = remove_all_t<T, Args...>;

            template<class Ctx>
            std::string operator()(const statement_type& rem, const Ctx& context) const {
                auto& table = pick_table<T>(context.db_objects);

                std::stringstream ss;
                ss << "DELETE FROM " << streaming_identifier(table.name)
                   << streaming_conditions_tuple(rem.conditions, context);
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<replace_t<T>, void> {
            using statement_type = replace_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                using object_type = expression_object_type_t<statement_type>;
                auto& table = pick_table<object_type>(context.db_objects);
                std::stringstream ss;
                ss << "REPLACE INTO " << streaming_identifier(table.name) << " ("
                   << streaming_non_generated_column_names(table) << ")"
                   << " VALUES ("
                   << streaming_field_values_excluding(check_if<is_generated_always>{},
                                                       empty_callable<std::false_type>,  //  don't exclude
                                                       context,
                                                       get_ref(statement.object))
                   << ")";
                return ss.str();
            }
        };

        template<class T, class... Cols>
        struct statement_serializer<insert_explicit<T, Cols...>, void> {
            using statement_type = insert_explicit<T, Cols...>;

            template<class Ctx>
            std::string operator()(const statement_type& ins, const Ctx& context) const {
                constexpr size_t colsCount = std::tuple_size<std::tuple<Cols...>>::value;
                static_assert(colsCount > 0, "Use insert or replace with 1 argument instead");
                using object_type = expression_object_type_t<statement_type>;
                auto& table = pick_table<object_type>(context.db_objects);
                std::stringstream ss;
                ss << "INSERT INTO " << streaming_identifier(table.name) << " ";
                ss << "(" << streaming_mapped_columns_expressions(ins.columns.columns, context) << ") "
                   << "VALUES (";
                iterate_tuple(ins.columns.columns,
                              [&ss, &context, &object = get_ref(ins.obj), first = true](auto& memberPointer) mutable {
                                  using member_pointer_type = std::decay_t<decltype(memberPointer)>;
                                  static_assert(!is_setter_v<member_pointer_type>,
                                                "Unable to use setter within insert explicit");

                                  constexpr std::array<const char*, 2> sep = {", ", ""};
                                  ss << sep[std::exchange(first, false)]
                                     << serialize(polyfill::invoke(memberPointer, object), context);
                              });
                ss << ")";
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<update_t<T>, void> {
            using statement_type = update_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                using object_type = expression_object_type_t<statement_type>;
                auto& table = pick_table<object_type>(context.db_objects);

                std::stringstream ss;
                ss << "UPDATE " << streaming_identifier(table.name) << " SET ";
                table.template for_each_column_excluding<mpl::disjunction_fn<is_primary_key, is_generated_always>>(
                    [&table, &ss, &context, &object = get_ref(statement.object), first = true](auto& column) mutable {
                        if(exists_in_composite_primary_key(table, column)) {
                            return;
                        }

                        constexpr std::array<const char*, 2> sep = {", ", ""};
                        ss << sep[std::exchange(first, false)] << streaming_identifier(column.name) << " = "
                           << serialize(polyfill::invoke(column.member_pointer, object), context);
                    });
                ss << " WHERE ";
                table.for_each_column(
                    [&table, &context, &ss, &object = get_ref(statement.object), first = true](auto& column) mutable {
                        if(!column.template is<is_primary_key>() && !exists_in_composite_primary_key(table, column)) {
                            return;
                        }

                        constexpr std::array<const char*, 2> sep = {" AND ", ""};
                        ss << sep[std::exchange(first, false)] << streaming_identifier(column.name) << " = "
                           << serialize(polyfill::invoke(column.member_pointer, object), context);
                    });
                return ss.str();
            }
        };

        template<class C>
        struct statement_serializer<dynamic_set_t<C>, void> {
            using statement_type = dynamic_set_t<C>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx&) const {
                std::stringstream ss;
                ss << "SET ";
                int index = 0;
                for(const dynamic_set_entry& entry: statement) {
                    if(index > 0) {
                        ss << ", ";
                    }
                    ss << entry.serialized_value;
                    ++index;
                }
                return ss.str();
            }
        };

        template<class... Args>
        struct statement_serializer<set_t<Args...>, void> {
            using statement_type = set_t<Args...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << "SET ";
                auto leftContext = context;
                leftContext.skip_table_name = true;
                iterate_tuple(statement.assigns, [&ss, &context, &leftContext, first = true](auto& value) mutable {
                    constexpr std::array<const char*, 2> sep = {", ", ""};
                    ss << sep[std::exchange(first, false)] << serialize(value.lhs, leftContext) << ' '
                       << value.serialize() << ' ' << serialize(value.rhs, context);
                });
                return ss.str();
            }
        };

        template<class Ctx, class... Args>
        std::set<std::pair<std::string, std::string>> collect_table_names(const set_t<Args...>& set, const Ctx& ctx) {
            auto collector = make_table_name_collector(ctx.db_objects);
            iterate_ast(set, collector);
            return std::move(collector.table_names);
        }

        template<class Ctx, class C>
        const std::set<std::pair<std::string, std::string>>& collect_table_names(const dynamic_set_t<C>& set,
                                                                                 const Ctx&) {
            return set.collector.table_names;
        }

        template<class Ctx, class T, satisfies<is_select, T> = true>
        std::set<std::pair<std::string, std::string>> collect_table_names(const T& sel, const Ctx& ctx) {
            auto collector = make_table_name_collector(ctx.db_objects);
            iterate_ast(sel.col, collector);
            iterate_ast(sel.conditions, collector);
            return std::move(collector.table_names);
        }

        template<class S, class... Wargs>
        struct statement_serializer<update_all_t<S, Wargs...>, void> {
            using statement_type = update_all_t<S, Wargs...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                const auto& tableNames = collect_table_names(statement.set, context);
                if(tableNames.empty()) {
                    throw std::system_error{orm_error_code::no_tables_specified};
                }
                const std::string& tableName = tableNames.begin()->first;

                std::stringstream ss;
                ss << "UPDATE " << streaming_identifier(tableName) << ' ' << serialize(statement.set, context)
                   << streaming_conditions_tuple(statement.conditions, context);
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<insert_t<T>, void> {
            using statement_type = insert_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                using object_type = expression_object_type_t<statement_type>;
                auto& table = pick_table<object_type>(context.db_objects);
                using is_without_rowid = typename std::decay_t<decltype(table)>::is_without_rowid;

                std::vector<std::reference_wrapper<const std::string>> columnNames;
                table.template for_each_column_excluding<
                    mpl::conjunction<mpl::not_<mpl::always<is_without_rowid>>,
                                     mpl::disjunction_fn<is_primary_key, is_generated_always>>>(
                    [&table, &columnNames](auto& column) {
                        if(exists_in_composite_primary_key(table, column)) {
                            return;
                        }

                        columnNames.push_back(cref(column.name));
                    });
                const size_t columnNamesCount = columnNames.size();

                std::stringstream ss;
                ss << "INSERT INTO " << streaming_identifier(table.name) << " ";
                if(columnNamesCount) {
                    ss << "(" << streaming_identifiers(columnNames) << ")";
                } else {
                    ss << "DEFAULT";
                }
                ss << " VALUES";
                if(columnNamesCount) {
                    ss << " ("
                       << streaming_field_values_excluding(
                              mpl::conjunction<mpl::not_<mpl::always<is_without_rowid>>,
                                               mpl::disjunction_fn<is_primary_key, is_generated_always>>{},
                              [&table](auto& column) {
                                  return exists_in_composite_primary_key(table, column);
                              },
                              context,
                              get_ref(statement.object))
                       << ")";
                }

                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<into_t<T>, void> {
            using statement_type = into_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type&, const Ctx& context) const {
                auto& table = pick_table<T>(context.db_objects);

                std::stringstream ss;
                ss << "INTO " << streaming_identifier(table.name);
                return ss.str();
            }
        };

        template<class C>
        struct statement_serializer<C, std::enable_if_t<polyfill::disjunction<is_columns<C>, is_struct<C>>::value>> {
            using statement_type = C;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                // subqueries should always use parentheses in column names
                auto subCtx = context;
                subCtx.use_parentheses = true;

                std::stringstream ss;
                if(context.use_parentheses) {
                    ss << '(';
                }
                ss << streaming_serialized(get_column_names(statement, subCtx));
                if(context.use_parentheses) {
                    ss << ')';
                }
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<
            T,
            std::enable_if_t<polyfill::disjunction<is_insert_raw<T>, is_replace_raw<T>>::value>> {
            using statement_type = T;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                if(is_insert_raw<T>::value) {
                    ss << "INSERT";
                } else {
                    ss << "REPLACE";
                }
                iterate_tuple(statement.args, [&context, &ss](auto& value) {
                    using value_type = std::decay_t<decltype(value)>;
                    ss << ' ';
                    if(is_columns<value_type>::value) {
                        auto newContext = context;
                        newContext.skip_table_name = true;
                        newContext.use_parentheses = true;
                        ss << serialize(value, newContext);
                    } else if(is_values<value_type>::value || is_select<value_type>::value) {
                        auto newContext = context;
                        newContext.use_parentheses = false;
                        ss << serialize(value, newContext);
                    } else {
                        ss << serialize(value, context);
                    }
                });
                return ss.str();
            }
        };

        template<class T, class... Ids>
        struct statement_serializer<remove_t<T, Ids...>, void> {
            using statement_type = remove_t<T, Ids...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                auto& table = pick_table<T>(context.db_objects);
                std::stringstream ss;
                ss << "DELETE FROM " << streaming_identifier(table.name) << " "
                   << "WHERE ";
                std::vector<std::string> idsStrings;
                idsStrings.reserve(std::tuple_size<typename statement_type::ids_type>::value);
                iterate_tuple(statement.ids, [&idsStrings, &context](auto& idValue) {
                    idsStrings.push_back(serialize(idValue, context));
                });
                table.for_each_primary_key_column([&table, &ss, &idsStrings, index = 0](auto& memberPointer) mutable {
                    auto* columnName = table.find_column_name(memberPointer);
                    if(!columnName) {
                        throw std::system_error{orm_error_code::column_not_found};
                    }

                    constexpr std::array<const char*, 2> sep = {" AND ", ""};
                    ss << sep[index == 0] << streaming_identifier(*columnName) << " = " << idsStrings[index];
                    ++index;
                });
                return ss.str();
            }
        };

        template<class It, class L, class O>
        struct statement_serializer<replace_range_t<It, L, O>, void> {
            using statement_type = replace_range_t<It, L, O>;

            template<class Ctx>
            std::string operator()(const statement_type& rep, const Ctx& context) const {
                using object_type = expression_object_type_t<statement_type>;
                auto& table = pick_table<object_type>(context.db_objects);

                std::stringstream ss;
                ss << "REPLACE INTO " << streaming_identifier(table.name) << " ("
                   << streaming_non_generated_column_names(table) << ")";
                const auto valuesCount = std::distance(rep.range.first, rep.range.second);
                const auto columnsCount = table.template count_of_columns_excluding<is_generated_always>();
                ss << " VALUES " << streaming_values_placeholders(columnsCount, valuesCount);
                return ss.str();
            }
        };

        template<class It, class L, class O>
        struct statement_serializer<insert_range_t<It, L, O>, void> {
            using statement_type = insert_range_t<It, L, O>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                using object_type = expression_object_type_t<statement_type>;
                auto& table = pick_table<object_type>(context.db_objects);
                using is_without_rowid = typename std::decay_t<decltype(table)>::is_without_rowid;

                std::vector<std::reference_wrapper<const std::string>> columnNames;
                table.template for_each_column_excluding<
                    mpl::conjunction<mpl::not_<mpl::always<is_without_rowid>>,
                                     mpl::disjunction_fn<is_primary_key, is_generated_always>>>(
                    [&table, &columnNames](auto& column) {
                        if(exists_in_composite_primary_key(table, column)) {
                            return;
                        }

                        columnNames.push_back(cref(column.name));
                    });
                const size_t valuesCount = std::distance(statement.range.first, statement.range.second);
                const size_t columnNamesCount = columnNames.size();

                std::stringstream ss;
                ss << "INSERT INTO " << streaming_identifier(table.name) << " ";
                if(columnNamesCount) {
                    ss << "(" << streaming_identifiers(columnNames) << ")";
                } else {
                    ss << "DEFAULT";
                }
                ss << " VALUES ";
                if(columnNamesCount) {
                    ss << streaming_values_placeholders(columnNamesCount, valuesCount);
                } else if(valuesCount != 1) {
                    throw std::system_error{orm_error_code::cannot_use_default_value};
                }
                return ss.str();
            }
        };

        template<class T, class Ctx>
        std::string serialize_get_all_impl(const T& getAll, const Ctx& context) {
            using table_type = type_t<T>;
            using mapped_type = mapped_type_proxy_t<table_type>;

            auto& table = pick_table<mapped_type>(context.db_objects);

            std::stringstream ss;
            ss << "SELECT " << streaming_table_column_names(table, alias_extractor<table_type>::as_qualifier(table))
               << " FROM " << streaming_identifier(table.name, alias_extractor<table_type>::as_alias())
               << streaming_conditions_tuple(getAll.conditions, context);
            return ss.str();
        }

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
        template<class T, class R, class... Args>
        struct statement_serializer<get_all_optional_t<T, R, Args...>, void> {
            using statement_type = get_all_optional_t<T, R, Args...>;

            template<class Ctx>
            std::string operator()(const statement_type& get, const Ctx& context) const {
                return serialize_get_all_impl(get, context);
            }
        };
#endif  //  SQLITE_ORM_OPTIONAL_SUPPORTED

        template<class T, class R, class... Args>
        struct statement_serializer<get_all_pointer_t<T, R, Args...>, void> {
            using statement_type = get_all_pointer_t<T, R, Args...>;

            template<class Ctx>
            std::string operator()(const statement_type& get, const Ctx& context) const {
                return serialize_get_all_impl(get, context);
            }
        };

        template<class T, class R, class... Args>
        struct statement_serializer<get_all_t<T, R, Args...>, void> {
            using statement_type = get_all_t<T, R, Args...>;

            template<class Ctx>
            std::string operator()(const statement_type& get, const Ctx& context) const {
                return serialize_get_all_impl(get, context);
            }
        };

        template<class T, class Ctx>
        std::string serialize_get_impl(const T&, const Ctx& context) {
            using primary_type = type_t<T>;
            auto& table = pick_table<primary_type>(context.db_objects);
            std::stringstream ss;
            ss << "SELECT " << streaming_table_column_names(table, std::string{}) << " FROM "
               << streaming_identifier(table.name) << " WHERE ";

            auto primaryKeyColumnNames = table.primary_key_column_names();
            if(primaryKeyColumnNames.empty()) {
                throw std::system_error{orm_error_code::table_has_no_primary_key_column};
            }

            for(size_t i = 0; i < primaryKeyColumnNames.size(); ++i) {
                if(i > 0) {
                    ss << " AND ";
                }
                ss << streaming_identifier(primaryKeyColumnNames[i]) << " = ?";
            }
            return ss.str();
        }

        template<class T, class... Ids>
        struct statement_serializer<get_t<T, Ids...>, void> {
            using statement_type = get_t<T, Ids...>;

            template<class Ctx>
            std::string operator()(const statement_type& get, const Ctx& context) const {
                return serialize_get_impl(get, context);
            }
        };

        template<class T, class... Ids>
        struct statement_serializer<get_pointer_t<T, Ids...>, void> {
            using statement_type = get_pointer_t<T, Ids...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                return serialize_get_impl(statement, context);
            }
        };

        template<>
        struct statement_serializer<conflict_action, void> {
            using statement_type = conflict_action;

            template<class Ctx>
            serialize_result_type operator()(const statement_type& statement, const Ctx&) const {
                switch(statement) {
                    case conflict_action::replace:
                        return "REPLACE";
                    case conflict_action::abort:
                        return "ABORT";
                    case conflict_action::fail:
                        return "FAIL";
                    case conflict_action::ignore:
                        return "IGNORE";
                    case conflict_action::rollback:
                        return "ROLLBACK";
                }
                return {};
            }
        };

        template<>
        struct statement_serializer<insert_constraint, void> {
            using statement_type = insert_constraint;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;

                ss << "OR " << serialize(statement.action, context);
                return ss.str();
            }
        };

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
        template<class T, class... Ids>
        struct statement_serializer<get_optional_t<T, Ids...>, void> {
            using statement_type = get_optional_t<T, Ids...>;

            template<class Ctx>
            std::string operator()(const statement_type& get, const Ctx& context) const {
                return serialize_get_impl(get, context);
            }
        };
#endif  //  SQLITE_ORM_OPTIONAL_SUPPORTED
        template<class T, class... Args>
        struct statement_serializer<select_t<T, Args...>, void> {
            using statement_type = select_t<T, Args...>;

            template<class Ctx>
            std::string operator()(const statement_type& sel, Ctx context) const {
                context.skip_table_name = false;
                // subqueries should always use parentheses in column names
                auto subCtx = context;
                subCtx.use_parentheses = true;

                std::stringstream ss;
                if(!is_compound_operator<T>::value) {
                    if(!sel.highest_level && context.use_parentheses) {
                        ss << "(";
                    }
                    ss << "SELECT ";
                }
                if(get_distinct(sel.col)) {
                    ss << static_cast<std::string>(distinct(0)) << " ";
                }
                ss << streaming_serialized(get_column_names(sel.col, subCtx));
                using conditions_tuple = typename statement_type::conditions_type;
                constexpr bool hasExplicitFrom = tuple_has<conditions_tuple, is_from>::value;
                if(!hasExplicitFrom) {
                    auto tableNames = collect_table_names(sel, context);
                    using joins_index_sequence = filter_tuple_sequence_t<conditions_tuple, is_constrained_join>;
                    // deduplicate table names of constrained join statements
                    iterate_tuple(sel.conditions, joins_index_sequence{}, [&tableNames, &context](auto& join) {
                        using original_join_type = typename std::decay_t<decltype(join)>::type;
                        using cross_join_type = mapped_type_proxy_t<original_join_type>;
                        std::pair<const std::string&, std::string> tableNameWithAlias{
                            lookup_table_name<cross_join_type>(context.db_objects),
                            alias_extractor<original_join_type>::as_alias()};
                        tableNames.erase(tableNameWithAlias);
                    });
                    if(!tableNames.empty() && !is_compound_operator<T>::value) {
                        ss << " FROM " << streaming_identifiers(tableNames);
                    }
                }
                ss << streaming_conditions_tuple(sel.conditions, context);
                if(!is_compound_operator<T>::value) {
                    if(!sel.highest_level && context.use_parentheses) {
                        ss << ")";
                    }
                }
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<indexed_column_t<T>, void> {
            using statement_type = indexed_column_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << serialize(statement.column_or_expression, context);
                if(!statement._collation_name.empty()) {
                    ss << " COLLATE " << statement._collation_name;
                }
                if(statement._order) {
                    switch(statement._order) {
                        case -1:
                            ss << " DESC";
                            break;
                        case 1:
                            ss << " ASC";
                            break;
                        default:
                            throw std::system_error{orm_error_code::incorrect_order};
                    }
                }
                return ss.str();
            }
        };

#if SQLITE_VERSION_NUMBER >= 3009000
        template<class... Cs>
        struct statement_serializer<using_fts5_t<Cs...>, void> {
            using statement_type = using_fts5_t<Cs...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << "USING FTS5(";
                auto subContext = context;
                subContext.fts5_columns = true;
                ss << streaming_expressions_tuple(statement.columns, subContext) << ")";
                return ss.str();
            }
        };
#endif

        template<class M>
        struct statement_serializer<virtual_table_t<M>, void> {
            using statement_type = virtual_table_t<M>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << "CREATE VIRTUAL TABLE IF NOT EXISTS ";
                ss << streaming_identifier(statement.name) << ' ';
                ss << serialize(statement.module_details, context);
                return ss.str();
            }
        };

        template<class T, class... Cols>
        struct statement_serializer<index_t<T, Cols...>, void> {
            using statement_type = index_t<T, Cols...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << "CREATE ";
                if(statement.unique) {
                    ss << "UNIQUE ";
                }
                using indexed_type = typename std::decay_t<decltype(statement)>::table_mapped_type;
                ss << "INDEX IF NOT EXISTS " << streaming_identifier(statement.name) << " ON "
                   << streaming_identifier(lookup_table_name<indexed_type>(context.db_objects));
                std::vector<std::string> columnNames;
                std::string whereString;
                iterate_tuple(statement.elements, [&columnNames, &context, &whereString](auto& value) {
                    using value_type = std::decay_t<decltype(value)>;
                    if(!is_where<value_type>::value) {
                        auto newContext = context;
                        newContext.use_parentheses = false;
                        auto whereString = serialize(value, newContext);
                        columnNames.push_back(std::move(whereString));
                    } else {
                        auto columnName = serialize(value, context);
                        whereString = std::move(columnName);
                    }
                });
                ss << " (" << streaming_serialized(columnNames) << ")";
                if(!whereString.empty()) {
                    ss << ' ' << whereString;
                }
                return ss.str();
            }
        };

        template<class From>
        struct statement_serializer<From, match_if<is_from, From>> {
            using statement_type = From;

            template<class Ctx>
            std::string operator()(const statement_type&, const Ctx& context) const {
                std::stringstream ss;
                ss << "FROM ";
                iterate_tuple<typename From::tuple_type>([&context, &ss, first = true](auto* dummyItem) mutable {
                    using table_type = std::remove_pointer_t<decltype(dummyItem)>;

                    constexpr std::array<const char*, 2> sep = {", ", ""};
                    ss << sep[std::exchange(first, false)]
                       << streaming_identifier(lookup_table_name<mapped_type_proxy_t<table_type>>(context.db_objects),
                                               alias_extractor<table_type>::as_alias());
                });
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<old_t<T>, void> {
            using statement_type = old_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << "OLD.";
                auto newContext = context;
                newContext.skip_table_name = true;
                ss << serialize(statement.expression, newContext);
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<new_t<T>, void> {
            using statement_type = new_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << "NEW.";
                auto newContext = context;
                newContext.skip_table_name = true;
                ss << serialize(statement.expression, newContext);
                return ss.str();
            }
        };

        template<>
        struct statement_serializer<raise_t, void> {
            using statement_type = raise_t;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                switch(statement.type) {
                    case raise_t::type_t::ignore:
                        return "RAISE(IGNORE)";

                    case raise_t::type_t::rollback:
                        return "RAISE(ROLLBACK, " + serialize(statement.message, context) + ")";

                    case raise_t::type_t::abort:
                        return "RAISE(ABORT, " + serialize(statement.message, context) + ")";

                    case raise_t::type_t::fail:
                        return "RAISE(FAIL, " + serialize(statement.message, context) + ")";
                }
                return {};
            }
        };

        template<>
        struct statement_serializer<trigger_timing, void> {
            using statement_type = trigger_timing;

            template<class Ctx>
            serialize_result_type operator()(const statement_type& statement, const Ctx&) const {
                switch(statement) {
                    case trigger_timing::trigger_before:
                        return "BEFORE";
                    case trigger_timing::trigger_after:
                        return "AFTER";
                    case trigger_timing::trigger_instead_of:
                        return "INSTEAD OF";
                }
                return {};
            }
        };

        template<>
        struct statement_serializer<trigger_type, void> {
            using statement_type = trigger_type;

            template<class Ctx>
            serialize_result_type operator()(const statement_type& statement, const Ctx&) const {
                switch(statement) {
                    case trigger_type::trigger_delete:
                        return "DELETE";
                    case trigger_type::trigger_insert:
                        return "INSERT";
                    case trigger_type::trigger_update:
                        return "UPDATE";
                }
                return {};
            }
        };

        template<>
        struct statement_serializer<trigger_type_base_t, void> {
            using statement_type = trigger_type_base_t;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;

                ss << serialize(statement.timing, context) << " " << serialize(statement.type, context);
                return ss.str();
            }
        };

        template<class... Cs>
        struct statement_serializer<trigger_update_type_t<Cs...>, void> {
            using statement_type = trigger_update_type_t<Cs...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;

                ss << serialize(statement.timing, context) << " UPDATE OF "
                   << streaming_mapped_columns_expressions(statement.columns, context);
                return ss.str();
            }
        };

        template<class T, class W, class Trigger>
        struct statement_serializer<trigger_base_t<T, W, Trigger>, void> {
            using statement_type = trigger_base_t<T, W, Trigger>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;

                ss << serialize(statement.type_base, context);
                ss << " ON " << streaming_identifier(lookup_table_name<T>(context.db_objects));
                if(statement.do_for_each_row) {
                    ss << " FOR EACH ROW";
                }
                statement.container_when.apply([&ss, &context](auto& value) {
                    ss << " WHEN " << serialize(value, context);
                });
                return ss.str();
            }
        };

        template<class... S>
        struct statement_serializer<trigger_t<S...>, void> {
            using statement_type = trigger_t<S...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << "CREATE ";

                ss << "TRIGGER IF NOT EXISTS " << streaming_identifier(statement.name) << " "
                   << serialize(statement.base, context);
                ss << " BEGIN ";
                iterate_tuple(statement.elements, [&ss, &context](auto& element) {
                    using element_type = std::decay_t<decltype(element)>;
                    if(is_select<element_type>::value) {
                        auto newContext = context;
                        newContext.use_parentheses = false;
                        ss << serialize(element, newContext);
                    } else {
                        ss << serialize(element, context);
                    }
                    ss << ";";
                });
                ss << " END";

                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<where_t<T>, void> {
            using statement_type = where_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                ss << statement.serialize() << " ";
                auto whereString = serialize(statement.expression, context);
                ss << '(' << whereString << ')';
                return ss.str();
            }
        };

        template<class O>
        struct statement_serializer<order_by_t<O>, void> {
            using statement_type = order_by_t<O>;

            template<class Ctx>
            std::string operator()(const statement_type& orderBy, const Ctx& context) const {
                std::stringstream ss;
                ss << static_cast<std::string>(orderBy) << " ";
                ss << serialize_order_by(orderBy, context);
                return ss.str();
            }
        };

        template<class C>
        struct statement_serializer<dynamic_order_by_t<C>, void> {
            using statement_type = dynamic_order_by_t<C>;

            template<class Ctx>
            std::string operator()(const statement_type& orderBy, const Ctx& context) const {
                return serialize_order_by(orderBy, context);
            }
        };

        template<class... Args>
        struct statement_serializer<multi_order_by_t<Args...>, void> {
            using statement_type = multi_order_by_t<Args...>;

            template<class Ctx>
            std::string operator()(const statement_type& orderBy, const Ctx& context) const {
                std::stringstream ss;
                ss << static_cast<std::string>(orderBy) << " " << streaming_expressions_tuple(orderBy.args, context);
                return ss.str();
            }
        };

        template<class Join>
        struct statement_serializer<
            Join,
            std::enable_if_t<polyfill::disjunction<polyfill::is_specialization_of<Join, cross_join_t>,
                                                   polyfill::is_specialization_of<Join, natural_join_t>>::value>> {
            using statement_type = Join;

            template<class Ctx>
            std::string operator()(const statement_type& join, const Ctx& context) const {
                std::stringstream ss;
                ss << static_cast<std::string>(join) << " "
                   << streaming_identifier(lookup_table_name<type_t<Join>>(context.db_objects));
                return ss.str();
            }
        };

        template<class Join>
        struct statement_serializer<Join, match_if<is_constrained_join, Join>> {
            using statement_type = Join;

            template<class Ctx>
            std::string operator()(const statement_type& join, const Ctx& context) const {
                std::stringstream ss;
                ss << static_cast<std::string>(join) << " "
                   << streaming_identifier(lookup_table_name<mapped_type_proxy_t<type_t<Join>>>(context.db_objects),
                                           alias_extractor<type_t<Join>>::as_alias())
                   << " " << serialize(join.constraint, context);
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<on_t<T>, void> {
            using statement_type = on_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& on, const Ctx& context) const {
                std::stringstream ss;
                auto newContext = context;
                newContext.skip_table_name = false;
                ss << static_cast<std::string>(on) << " " << serialize(on.arg, newContext) << " ";
                return ss.str();
            }
        };

        template<class T, class... Args>
        struct statement_serializer<group_by_with_having<T, Args...>, void> {
            using statement_type = group_by_with_having<T, Args...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                auto newContext = context;
                newContext.skip_table_name = false;
                ss << "GROUP BY " << streaming_expressions_tuple(statement.args, newContext) << " HAVING "
                   << serialize(statement.expression, context);
                return ss.str();
            }
        };

        template<class... Args>
        struct statement_serializer<group_by_t<Args...>, void> {
            using statement_type = group_by_t<Args...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                auto newContext = context;
                newContext.skip_table_name = false;
                ss << "GROUP BY " << streaming_expressions_tuple(statement.args, newContext);
                return ss.str();
            }
        };

        /**
         *  HO - has offset
         *  OI - offset is implicit
         */
        template<class T, bool HO, bool OI, class O>
        struct statement_serializer<limit_t<T, HO, OI, O>, void> {
            using statement_type = limit_t<T, HO, OI, O>;

            template<class Ctx>
            std::string operator()(const statement_type& limt, const Ctx& context) const {
                auto newContext = context;
                newContext.skip_table_name = false;
                std::stringstream ss;
                ss << static_cast<std::string>(limt) << " ";
                if(HO) {
                    if(OI) {
                        limt.off.apply([&newContext, &ss](auto& value) {
                            ss << serialize(value, newContext);
                        });
                        ss << ", ";
                        ss << serialize(limt.lim, newContext);
                    } else {
                        ss << serialize(limt.lim, newContext) << " OFFSET ";
                        limt.off.apply([&newContext, &ss](auto& value) {
                            ss << serialize(value, newContext);
                        });
                    }
                } else {
                    ss << serialize(limt.lim, newContext);
                }
                return ss.str();
            }
        };

        template<>
        struct statement_serializer<default_values_t, void> {
            using statement_type = default_values_t;

            template<class Ctx>
            serialize_result_type operator()(const statement_type&, const Ctx&) const {
                return "DEFAULT VALUES";
            }
        };

        template<class T, class M>
        struct statement_serializer<using_t<T, M>, void> {
            using statement_type = using_t<T, M>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                auto newContext = context;
                newContext.skip_table_name = true;
                return static_cast<std::string>(statement) + " (" + serialize(statement.column, newContext) + ")";
            }
        };

        template<class... Args>
        struct statement_serializer<std::tuple<Args...>, void> {
            using statement_type = std::tuple<Args...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                if(context.use_parentheses) {
                    ss << '(';
                }
                ss << streaming_expressions_tuple(statement, context);
                if(context.use_parentheses) {
                    ss << ')';
                }
                return ss.str();
            }
        };

        template<class... Args>
        struct statement_serializer<values_t<Args...>, void> {
            using statement_type = values_t<Args...>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                if(context.use_parentheses) {
                    ss << '(';
                }
                ss << "VALUES ";
                {
                    Ctx tupleContext = context;
                    tupleContext.use_parentheses = true;
                    ss << streaming_expressions_tuple(statement.tuple, tupleContext);
                }
                if(context.use_parentheses) {
                    ss << ')';
                }
                return ss.str();
            }
        };

        template<class T>
        struct statement_serializer<dynamic_values_t<T>, void> {
            using statement_type = dynamic_values_t<T>;

            template<class Ctx>
            std::string operator()(const statement_type& statement, const Ctx& context) const {
                std::stringstream ss;
                if(context.use_parentheses) {
                    ss << '(';
                }
                ss << "VALUES " << streaming_dynamic_expressions(statement.vector, context);
                if(context.use_parentheses) {
                    ss << ')';
                }
                return ss.str();
            }
        };
    }
}

// #include "serializer_context.h"

// #include "schema/triggers.h"

// #include "object_from_column_builder.h"

// #include "row_extractor.h"

// #include "schema/table.h"

// #include "schema/column.h"

// #include "schema/index.h"

// #include "cte_storage.h"

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
#include <type_traits>
#include <tuple>
#include <string>
#include <vector>
#endif

// #include "functional/cxx_universal.h"
//  ::size_t
// #include "tuple_helper/tuple_fy.h"

// #include "table_type_of.h"

// #include "column_result.h"

// #include "select_constraints.h"

// #include "schema/table.h"

// #include "alias.h"

// #include "cte_types.h"

// #include "cte_column_names_collector.h"

// #include "column_expression.h"

#include <type_traits>  //  std::enable_if, std::is_same, std::decay, std::is_arithmetic
#include <tuple>  //  std::tuple
#include <functional>  //  std::reference_wrapper

// #include "functional/cxx_type_traits_polyfill.h"

// #include "tuple_helper/tuple_transformer.h"

// #include "type_traits.h"

// #include "select_constraints.h"

// #include "alias.h"

// #include "storage_traits.h"

namespace sqlite_orm {

    namespace internal {

        template<class DBOs, class E, class SFINAE = void>
        struct column_expression_type;

        /**
         *  Obains the expressions that form the columns of a subselect statement.
         */
        template<class DBOs, class E>
        using column_expression_of_t = typename column_expression_type<DBOs, E>::type;

        /**
         *  Identity.
         */
        template<class DBOs, class E, class SFINAE>
        struct column_expression_type {
            using type = E;
        };

        /**
         *  Resolve column alias.
         *  as_t<Alias, E> -> as_t<Alias, ColExpr>
         */
        template<class DBOs, class As>
        struct column_expression_type<DBOs, As, match_specialization_of<As, as_t>> {
            using type = as_t<alias_type_t<As>, column_expression_of_t<DBOs, expression_type_t<As>>>;
        };

        /**
         *  Resolve reference wrapper.
         *  reference_wrapper<T> -> T&
         */
        template<class DBOs, class E>
        struct column_expression_type<DBOs, std::reference_wrapper<E>, void>
            : std::add_lvalue_reference<column_expression_of_t<DBOs, E>> {};

        // No CTE for object expression.
        template<class DBOs, class E>
        struct column_expression_type<DBOs, object_t<E>, void> {
            static_assert(polyfill::always_false_v<E>, "Selecting an object in a subselect is not allowed.");
        };

        /**
         *  Resolve all columns of a mapped object or CTE.
         *  asterisk_t<O> -> tuple<ColExpr...>
         */
        template<class DBOs, class E>
        struct column_expression_type<DBOs,
                                      asterisk_t<E>,
                                      std::enable_if_t<polyfill::disjunction<polyfill::negation<is_recordset_alias<E>>,
                                                                             is_cte_moniker<E>>::value>>
            : storage_traits::storage_mapped_column_expressions<DBOs, E> {};

        template<class A>
        struct add_column_alias {
            template<typename ColExpr>
            using apply_t = alias_column_t<A, ColExpr>;
        };
        /**
         *  Resolve all columns of an aliased object.
         *  asterisk_t<Alias> -> tuple<alias_column_t<Alias, ColExpr>...>
         */
        template<class DBOs, class A>
        struct column_expression_type<DBOs, asterisk_t<A>, match_if<is_table_alias, A>>
            : tuple_transformer<typename storage_traits::storage_mapped_column_expressions<DBOs, type_t<A>>::type,
                                add_column_alias<A>::template apply_t> {};

        /**
         *  Resolve multiple columns.
         *  columns_t<C...> -> tuple<ColExpr...>
         */
        template<class DBOs, class... Args>
        struct column_expression_type<DBOs, columns_t<Args...>, void> {
            using type = std::tuple<column_expression_of_t<DBOs, std::decay_t<Args>>...>;
        };

        /**
         *  Resolve multiple columns.
         *  struct_t<T, C...> -> tuple<ColExpr...>
         */
        template<class DBOs, class T, class... Args>
        struct column_expression_type<DBOs, struct_t<T, Args...>, void> {
            using type = std::tuple<column_expression_of_t<DBOs, std::decay_t<Args>>...>;
        };

        /**
         *  Resolve column(s) of subselect.
         *  select_t<E, Args...> -> ColExpr, tuple<ColExpr....>
         */
        template<class DBOs, class E, class... Args>
        struct column_expression_type<DBOs, select_t<E, Args...>> : column_expression_type<DBOs, E> {};
    }
}

// #include "storage_lookup.h"

namespace sqlite_orm {
    namespace internal {

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
        // F = field_type
        template<typename Moniker,
                 typename ExplicitColRefs,
                 typename Expression,
                 typename SubselectColRefs,
                 typename FinalColRefs,
                 typename F>
        struct create_cte_mapper {
            using type = subselect_mapper<Moniker, ExplicitColRefs, Expression, SubselectColRefs, FinalColRefs, F>;
        };

        // std::tuple<Fs...>
        template<typename Moniker,
                 typename ExplicitColRefs,
                 typename Expression,
                 typename SubselectColRefs,
                 typename FinalColRefs,
                 typename... Fs>
        struct create_cte_mapper<Moniker,
                                 ExplicitColRefs,
                                 Expression,
                                 SubselectColRefs,
                                 FinalColRefs,
                                 std::tuple<Fs...>> {
            using type = subselect_mapper<Moniker, ExplicitColRefs, Expression, SubselectColRefs, FinalColRefs, Fs...>;
        };

        template<typename Moniker,
                 typename ExplicitColRefs,
                 typename Expression,
                 typename SubselectColRefs,
                 typename FinalColRefs,
                 typename Result>
        using create_cte_mapper_t =
            typename create_cte_mapper<Moniker, ExplicitColRefs, Expression, SubselectColRefs, FinalColRefs, Result>::
                type;

        // aliased column expressions, explicit or implicitly numbered
        template<typename F, typename ColRef, satisfies_is_specialization_of<ColRef, alias_holder> = true>
        static auto make_cte_column(std::string name, const ColRef& /*finalColRef*/) {
            using object_type = aliased_field<type_t<ColRef>, F>;

            return sqlite_orm::make_column<>(std::move(name), &object_type::field);
        }

        // F O::*
        template<typename F, typename ColRef, satisfies<std::is_member_pointer, ColRef> = true>
        static auto make_cte_column(std::string name, const ColRef& finalColRef) {
            // using object_type = table_type_of_t<ColRef>;
            using column_type = column_t<ColRef, empty_setter>;

            return column_type{std::move(name), finalColRef, empty_setter{}};
        }

        /**
         *  Concatenate newly created tables with given DBOs, forming a new set of DBOs.
         */
        template<typename DBOs, size_t... Idx, typename... CTETables>
        auto db_objects_cat(const DBOs& dbObjects, std::index_sequence<Idx...>, CTETables&&... cteTables) {
            return std::tuple{std::forward<CTETables>(cteTables)..., get<Idx>(dbObjects)...};
        }

        /**
         *  Concatenate newly created tables with given DBOs, forming a new set of DBOs.
         */
        template<typename DBOs, typename... CTETables>
        auto db_objects_cat(const DBOs& dbObjects, CTETables&&... cteTables) {
            return db_objects_cat(dbObjects,
                                  std::make_index_sequence<std::tuple_size_v<DBOs>>{},
                                  std::forward<CTETables>(cteTables)...);
        }

        /**
         *  This function returns the expression contained in a subselect that is relevant for
         *  creating the definition of a CTE table.
         *  Because CTEs can recursively refer to themselves in a compound statement, parsing
         *  the whole compound statement would lead to compiler errors if a column_pointer<>
         *  can't be resolved. Therefore, at the time of building a CTE table, we are only
         *  interested in the column results of the left-most select expression.
         */
        template<class Select>
        decltype(auto) get_cte_driving_subselect(const Select& subSelect);

        /**
         *  Return given select expression.
         */
        template<class Select>
        decltype(auto) get_cte_driving_subselect(const Select& subSelect) {
            return subSelect;
        }

        /**
         *  Return left-most select expression of compound statement.
         */
        template<class Compound, class... Args, std::enable_if_t<is_compound_operator_v<Compound>, bool> = true>
        decltype(auto) get_cte_driving_subselect(const select_t<Compound, Args...>& subSelect) {
            return std::get<0>(subSelect.col.compound);
        }

        /**
         *  Return a tuple of member pointers of all columns
         */
        template<class C, size_t... Idx>
        auto get_table_columns_fields(const C& coldef, std::index_sequence<Idx...>) {
            return std::make_tuple(get<Idx>(coldef).member_pointer...);
        }

        // any expression -> numeric column alias
        template<class DBOs,
                 class E,
                 size_t Idx = 0,
                 std::enable_if_t<polyfill::negation_v<polyfill::is_specialization_of<E, std::tuple>>, bool> = true>
        auto extract_colref_expressions(const DBOs& /*dbObjects*/, const E& /*col*/, std::index_sequence<Idx> = {})
            -> std::tuple<alias_holder<decltype(n_to_colalias<Idx>())>> {
            return {};
        }

        // expression_t<>
        template<class DBOs, class E, size_t Idx = 0>
        auto
        extract_colref_expressions(const DBOs& dbObjects, const expression_t<E>& col, std::index_sequence<Idx> s = {}) {
            return extract_colref_expressions(dbObjects, col.value, s);
        }

        // F O::* (field/getter) -> field/getter
        template<class DBOs, class F, class O, size_t Idx = 0>
        auto extract_colref_expressions(const DBOs& /*dbObjects*/, F O::*col, std::index_sequence<Idx> = {}) {
            return std::make_tuple(col);
        }

        // as_t<> (aliased expression) -> alias_holder
        template<class DBOs, class A, class E, size_t Idx = 0>
        std::tuple<alias_holder<A>> extract_colref_expressions(const DBOs& /*dbObjects*/,
                                                               const as_t<A, E>& /*col*/,
                                                               std::index_sequence<Idx> = {}) {
            return {};
        }

        // alias_holder<> (colref) -> alias_holder
        template<class DBOs, class A, size_t Idx = 0>
        std::tuple<alias_holder<A>> extract_colref_expressions(const DBOs& /*dbObjects*/,
                                                               const alias_holder<A>& /*col*/,
                                                               std::index_sequence<Idx> = {}) {
            return {};
        }

        // column_pointer<>
        template<class DBOs, class Moniker, class F, size_t Idx = 0>
        auto extract_colref_expressions(const DBOs& dbObjects,
                                        const column_pointer<Moniker, F>& col,
                                        std::index_sequence<Idx> s = {}) {
            return extract_colref_expressions(dbObjects, col.field, s);
        }

        // column expression tuple
        template<class DBOs, class... Args, size_t... Idx>
        auto extract_colref_expressions(const DBOs& dbObjects,
                                        const std::tuple<Args...>& cols,
                                        std::index_sequence<Idx...>) {
            return std::tuple_cat(extract_colref_expressions(dbObjects, get<Idx>(cols), std::index_sequence<Idx>{})...);
        }

        // columns_t<>
        template<class DBOs, class... Args>
        auto extract_colref_expressions(const DBOs& dbObjects, const columns_t<Args...>& cols) {
            return extract_colref_expressions(dbObjects, cols.columns, std::index_sequence_for<Args...>{});
        }

        // asterisk_t<> -> fields
        template<class DBOs, class O>
        auto extract_colref_expressions(const DBOs& dbObjects, const asterisk_t<O>& /*col*/) {
            using table_type = storage_pick_table_t<O, DBOs>;
            using elements_t = typename table_type::elements_type;
            using column_idxs = filter_tuple_sequence_t<elements_t, is_column>;

            auto& table = pick_table<O>(dbObjects);
            return get_table_columns_fields(table.elements, column_idxs{});
        }

        template<class DBOs, class E, class... Args>
        void extract_colref_expressions(const DBOs& /*dbObjects*/, const select_t<E, Args...>& /*subSelect*/) = delete;

        template<class DBOs, class Compound, std::enable_if_t<is_compound_operator_v<Compound>, bool> = true>
        void extract_colref_expressions(const DBOs& /*dbObjects*/, const Compound& /*subSelect*/) = delete;

        /*
         *  Depending on ExplicitColRef's type returns either the explicit column reference
         *  or the expression's column reference otherwise.
         */
        template<typename DBOs, typename SubselectColRef, typename ExplicitColRef>
        auto determine_cte_colref(const DBOs& /*dbObjects*/,
                                  const SubselectColRef& subselectColRef,
                                  const ExplicitColRef& explicitColRef) {
            if constexpr(polyfill::is_specialization_of_v<ExplicitColRef, alias_holder>) {
                return explicitColRef;
            } else if constexpr(std::is_member_pointer<ExplicitColRef>::value) {
                return explicitColRef;
            } else if constexpr(std::is_base_of_v<column_identifier, ExplicitColRef>) {
                return explicitColRef.member_pointer;
            } else if constexpr(std::is_same_v<ExplicitColRef, std::string>) {
                return subselectColRef;
            } else if constexpr(std::is_same_v<ExplicitColRef, polyfill::remove_cvref_t<decltype(std::ignore)>>) {
                return subselectColRef;
            } else {
                static_assert(polyfill::always_false_v<ExplicitColRef>, "Invalid explicit column reference specified");
            }
        }

        template<typename DBOs, typename SubselectColRefs, typename ExplicitColRefs, size_t... Idx>
        auto determine_cte_colrefs([[maybe_unused]] const DBOs& dbObjects,
                                   const SubselectColRefs& subselectColRefs,
                                   [[maybe_unused]] const ExplicitColRefs& explicitColRefs,
                                   std::index_sequence<Idx...>) {
            if constexpr(std::tuple_size_v<ExplicitColRefs> != 0) {
                static_assert(
                    (!is_builtin_numeric_column_alias_v<
                         alias_holder_type_or_none_t<std::tuple_element_t<Idx, ExplicitColRefs>>> &&
                     ...),
                    "Numeric column aliases are reserved for referencing columns locally within a single CTE.");

                return std::tuple{
                    determine_cte_colref(dbObjects, get<Idx>(subselectColRefs), get<Idx>(explicitColRefs))...};
            } else {
                return subselectColRefs;
            }
        }

        template<typename Mapper, typename DBOs, typename ColRefs, size_t... CIs>
        auto make_cte_table_using_column_indices(const DBOs& /*dbObjects*/,
                                                 std::string tableName,
                                                 std::vector<std::string> columnNames,
                                                 const ColRefs& finalColRefs,
                                                 std::index_sequence<CIs...>) {
            return make_table<Mapper>(
                std::move(tableName),
                make_cte_column<std::tuple_element_t<CIs, typename Mapper::fields_type>>(std::move(columnNames.at(CIs)),
                                                                                         get<CIs>(finalColRefs))...);
        }

        template<typename DBOs, typename CTE>
        auto make_cte_table(const DBOs& dbObjects, const CTE& cte) {
            using cte_type = CTE;

            auto subSelect = get_cte_driving_subselect(cte.subselect);

            using subselect_type = decltype(subSelect);
            using column_results = column_result_of_t<DBOs, subselect_type>;
            using index_sequence = std::make_index_sequence<std::tuple_size_v<tuplify_t<column_results>>>;
            static_assert(cte_type::explicit_colref_count == 0 ||
                              cte_type::explicit_colref_count == index_sequence::size(),
                          "Number of explicit columns of common table expression doesn't match the number of columns "
                          "in the subselect.");

            std::string tableName = alias_extractor<cte_moniker_type_t<cte_type>>::extract();
            auto subselectColRefs = extract_colref_expressions(dbObjects, subSelect.col);
            const auto& finalColRefs =
                determine_cte_colrefs(dbObjects, subselectColRefs, cte.explicitColumns, index_sequence{});

            serializer_context context{dbObjects};
            std::vector<std::string> columnNames = collect_cte_column_names(subSelect, cte.explicitColumns, context);

            using mapper_type = create_cte_mapper_t<cte_moniker_type_t<cte_type>,
                                                    typename cte_type::explicit_colrefs_tuple,
                                                    column_expression_of_t<DBOs, subselect_type>,
                                                    decltype(subselectColRefs),
                                                    polyfill::remove_cvref_t<decltype(finalColRefs)>,
                                                    column_results>;
            return make_cte_table_using_column_indices<mapper_type>(dbObjects,
                                                                    std::move(tableName),
                                                                    std::move(columnNames),
                                                                    finalColRefs,
                                                                    index_sequence{});
        }

        template<typename DBOs, typename... CTEs, size_t Ii, size_t... In>
        decltype(auto) make_recursive_cte_db_objects(const DBOs& dbObjects,
                                                     const common_table_expressions<CTEs...>& cte,
                                                     std::index_sequence<Ii, In...>) {
            auto tbl = make_cte_table(dbObjects, get<Ii>(cte));

            if constexpr(sizeof...(In) > 0) {
                return make_recursive_cte_db_objects(
                    // Because CTEs can depend on their predecessor we recursively pass in a new set of DBOs
                    db_objects_cat(dbObjects, std::move(tbl)),
                    cte,
                    std::index_sequence<In...>{});
            } else {
                return db_objects_cat(dbObjects, std::move(tbl));
            }
        }

        /**
         *  Return new DBOs for CTE expressions.
         */
        template<class DBOs, class E, class... CTEs, satisfies<is_db_objects, DBOs> = true>
        decltype(auto) db_objects_for_expression(DBOs& dbObjects, const with_t<E, CTEs...>& e) {
            return make_recursive_cte_db_objects(dbObjects, e.cte, std::index_sequence_for<CTEs...>{});
        }
#endif
    }
}

// #include "util.h"

// #include "serializing_util.h"

namespace sqlite_orm {

    namespace internal {
        /*
         *  Implementation note: the technique of indirect expression testing is because
         *  of older compilers having problems with the detection of dependent templates [SQLITE_ORM_BROKEN_ALIAS_TEMPLATE_DEPENDENT_EXPR_SFINAE].
         *  It must also be a type that differs from those for `is_printable_v`, `is_bindable_v`.
         */
        template<class Binder>
        struct indirectly_test_preparable;

        template<class S, class E, class SFINAE = void>
        SQLITE_ORM_INLINE_VAR constexpr bool is_preparable_v = false;
        template<class S, class E>
        SQLITE_ORM_INLINE_VAR constexpr bool is_preparable_v<
            S,
            E,
            polyfill::void_t<indirectly_test_preparable<decltype(std::declval<S>().prepare(std::declval<E>()))>>> =
            true;

        /**
         *  Storage class itself. Create an instanse to use it as an interfacto to sqlite db by calling `make_storage`
         *  function.
         */
        template<class... DBO>
        struct storage_t : storage_base {
            using self = storage_t<DBO...>;
            using db_objects_type = db_objects_tuple<DBO...>;

            /**
             *  @param filename database filename.
             *  @param dbObjects db_objects_tuple
             */
            storage_t(std::string filename, db_objects_type dbObjects) :
                storage_base{std::move(filename), foreign_keys_count(dbObjects)}, db_objects{std::move(dbObjects)} {}

            storage_t(const storage_t&) = default;

          private:
            db_objects_type db_objects;

            /**
             *  Obtain a storage_t's const db_objects_tuple.
             *
             *  @note Historically, `serializer_context_builder` was declared friend, along with
             *  a few other library stock objects, in order to limit access to the db_objects_tuple.
             *  However, one could gain access to a storage_t's db_objects_tuple through
             *  `serializer_context_builder`, hence leading the whole friend declaration mambo-jumbo
             *  ad absurdum.
             *  Providing a free function is way better and cleaner.
             *
             *  Hence, friend was replaced by `obtain_db_objects()` and `pick_const_impl()`.
             */
            friend const db_objects_type& obtain_db_objects(const self& storage) noexcept {
                return storage.db_objects;
            }

            template<class Table>
            void create_table(sqlite3* db, const std::string& tableName, const Table& table) {
                // using table_type = std::decay_t<decltype(table)>;
                using context_t = serializer_context<db_objects_type>;

                context_t context{this->db_objects};
                statement_serializer<Table, void> serializer;
                std::string sql = serializer.serialize(table, context, tableName);
                perform_void_exec(db, std::move(sql));
            }

            /**
             *  Copies sourceTableName to another table with name: destinationTableName
             *  Performs INSERT INTO %destinationTableName% () SELECT %table.column_names% FROM %sourceTableName%
             */
            template<class Table>
            void copy_table(sqlite3* db,
                            const std::string& sourceTableName,
                            const std::string& destinationTableName,
                            const Table& table,
                            const std::vector<const table_xinfo*>& columnsToIgnore) const;

#if SQLITE_VERSION_NUMBER >= 3035000  //  DROP COLUMN feature exists (v3.35.0)
            void drop_column(sqlite3* db, const std::string& tableName, const std::string& columnName) {
                std::stringstream ss;
                ss << "ALTER TABLE " << streaming_identifier(tableName) << " DROP COLUMN "
                   << streaming_identifier(columnName) << std::flush;
                perform_void_exec(db, ss.str());
            }
#endif

            template<class Table>
            void drop_create_with_loss(sqlite3* db, const Table& table) {
                // eliminated all transaction handling
                this->drop_table_internal(db, table.name);
                this->create_table(db, table.name, table);
            }

            template<class Table>
            void backup_table(sqlite3* db, const Table& table, const std::vector<const table_xinfo*>& columnsToIgnore) {

                //  here we copy source table to another with a name with '_backup' suffix, but in case table with such
                //  a name already exists we append suffix 1, then 2, etc until we find a free name..
                auto backupTableName = table.name + "_backup";
                if(this->table_exists(db, backupTableName)) {
                    int suffix = 1;
                    do {
                        std::stringstream ss;
                        ss << suffix << std::flush;
                        auto anotherBackupTableName = backupTableName + ss.str();
                        if(!this->table_exists(db, anotherBackupTableName)) {
                            backupTableName = std::move(anotherBackupTableName);
                            break;
                        }
                        ++suffix;
                    } while(true);
                }
                this->create_table(db, backupTableName, table);

                this->copy_table(db, table.name, backupTableName, table, columnsToIgnore);

                this->drop_table_internal(db, table.name);

                this->rename_table(db, backupTableName, table.name);
            }

            template<class O>
            void assert_mapped_type() const {
                static_assert(tuple_has_type<db_objects_type, O, object_type_t>::value,
                              "type is not mapped to storage");
            }

            template<class O>
            void assert_updatable_type() const {
#if defined(SQLITE_ORM_FOLD_EXPRESSIONS_SUPPORTED)
                using Table = storage_pick_table_t<O, db_objects_type>;
                using elements_type = elements_type_t<Table>;
                using col_index_sequence = filter_tuple_sequence_t<elements_type, is_column>;
                using pk_index_sequence = filter_tuple_sequence_t<elements_type, is_primary_key>;
                using pkcol_index_sequence = col_index_sequence_with<elements_type, is_primary_key>;
                constexpr size_t dedicatedPrimaryKeyColumnsCount =
                    nested_tuple_size_for_t<columns_tuple_t, elements_type, pk_index_sequence>::value;

                constexpr size_t primaryKeyColumnsCount =
                    dedicatedPrimaryKeyColumnsCount + pkcol_index_sequence::size();
                constexpr ptrdiff_t nonPrimaryKeysColumnsCount = col_index_sequence::size() - primaryKeyColumnsCount;
                static_assert(primaryKeyColumnsCount > 0, "A table without primary keys cannot be updated");
                static_assert(
                    nonPrimaryKeysColumnsCount > 0,
                    "A table with only primary keys cannot be updated. You need at least 1 non-primary key column");
#endif
            }

            template<class O,
                     class Table = storage_pick_table_t<O, db_objects_type>,
                     std::enable_if_t<Table::is_without_rowid::value, bool> = true>
            void assert_insertable_type() const {}

            template<class O,
                     class Table = storage_pick_table_t<O, db_objects_type>,
                     std::enable_if_t<!Table::is_without_rowid::value, bool> = true>
            void assert_insertable_type() const {
                using elements_type = elements_type_t<Table>;
                using pkcol_index_sequence = col_index_sequence_with<elements_type, is_primary_key>;
                static_assert(
                    count_filtered_tuple<elements_type, is_primary_key_insertable, pkcol_index_sequence>::value <= 1,
                    "Attempting to execute 'insert' request into an noninsertable table was detected. "
                    "Insertable table cannot contain > 1 primary keys. Please use 'replace' instead of "
                    "'insert', or you can use 'insert' with explicit column listing.");
                static_assert(count_filtered_tuple<elements_type,
                                                   check_if_not<is_primary_key_insertable>::template fn,
                                                   pkcol_index_sequence>::value == 0,
                              "Attempting to execute 'insert' request into an noninsertable table was detected. "
                              "Insertable table cannot contain non-standard primary keys. Please use 'replace' instead "
                              "of 'insert', or you can use 'insert' with explicit column listing.");
            }

            template<class O>
            auto& get_table() const {
                return pick_table<O>(this->db_objects);
            }

            template<class O>
            auto& get_table() {
                return pick_table<O>(this->db_objects);
            }

          public:
            template<class T, class O = mapped_type_proxy_t<T>, class... Args>
            mapped_view<O, self, Args...> iterate(Args&&... args) {
                this->assert_mapped_type<O>();

                auto con = this->get_connection();
                return {*this, std::move(con), std::forward<Args>(args)...};
            }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
            template<orm_refers_to_table auto mapped, class... Args>
            auto iterate(Args&&... args) {
                return this->iterate<decltype(mapped)>(std::forward<Args>(args)...);
            }
#endif

#if defined(SQLITE_ORM_SENTINEL_BASED_FOR_SUPPORTED) && defined(SQLITE_ORM_DEFAULT_COMPARISONS_SUPPORTED)
            template<class Select>
#ifdef SQLITE_ORM_CONCEPTS_SUPPORTED
                requires(is_select_v<Select>)
#endif
            result_set_view<Select, db_objects_type> iterate(Select expression) {
                expression.highest_level = true;
                auto con = this->get_connection();
                return {this->db_objects, std::move(con), std::move(expression)};
            }

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
            template<class... CTEs, class E>
#ifdef SQLITE_ORM_CONCEPTS_SUPPORTED
                requires(is_select_v<E>)
#endif
            result_set_view<with_t<E, CTEs...>, db_objects_type> iterate(with_t<E, CTEs...> expression) {
                auto con = this->get_connection();
                return {this->db_objects, std::move(con), std::move(expression)};
            }
#endif
#endif

            /**
             * Delete from routine.
             * O is an object's type. Must be specified explicitly.
             * @param args optional conditions: `where`, `join` etc
             * @example: storage.remove_all<User>(); - DELETE FROM users
             * @example: storage.remove_all<User>(where(in(&User::id, {5, 6, 7}))); - DELETE FROM users WHERE id IN (5, 6, 7)
             */
            template<class O, class... Args>
            void remove_all(Args&&... args) {
                this->assert_mapped_type<O>();
                auto statement = this->prepare(sqlite_orm::remove_all<O>(std::forward<Args>(args)...));
                this->execute(statement);
            }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
            template<orm_table_reference auto table, class... Args>
            void remove_all(Args&&... args) {
                return this->remove_all<auto_decay_table_ref_t<table>>(std::forward<Args>(args)...);
            }
#endif

            /**
             *  Delete routine.
             *  O is an object's type. Must be specified explicitly.
             *  @param ids ids of object to be removed.
             */
            template<class O, class... Ids>
            void remove(Ids... ids) {
                this->assert_mapped_type<O>();
                auto statement = this->prepare(sqlite_orm::remove<O>(std::forward<Ids>(ids)...));
                this->execute(statement);
            }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
            template<orm_table_reference auto table, class... Ids>
            void remove(Ids... ids) {
                return this->remove<auto_decay_table_ref_t<table>>(std::forward<Ids>(ids)...);
            }
#endif

            /**
             *  Update routine. Sets all non primary key fields where primary key is equal.
             *  O is an object type. May be not specified explicitly cause it can be deduced by
             *      compiler from first parameter.
             *  @param o object to be updated.
             */
            template<class O>
            void update(const O& o) {
                this->assert_mapped_type<O>();
                auto statement = this->prepare(sqlite_orm::update(std::ref(o)));
                this->execute(statement);
            }

            template<class S, class... Wargs>
            void update_all(S set, Wargs... wh) {
                static_assert(internal::is_set<S>::value,
                              "first argument in update_all can be either set or dynamic_set");
                auto statement = this->prepare(sqlite_orm::update_all(std::move(set), std::forward<Wargs>(wh)...));
                this->execute(statement);
            }

          protected:
            template<class F, class O, class... Args>
            std::string group_concat_internal(F O::*m, std::unique_ptr<std::string> y, Args&&... args) {
                this->assert_mapped_type<O>();
                std::vector<std::string> rows;
                if(y) {
                    rows = this->select(sqlite_orm::group_concat(m, std::move(*y)), std::forward<Args>(args)...);
                } else {
                    rows = this->select(sqlite_orm::group_concat(m), std::forward<Args>(args)...);
                }
                if(!rows.empty()) {
                    return std::move(rows.front());
                } else {
                    return {};
                }
            }

          public:
            /**
             *  SELECT * routine.
             *  T is an explicitly specified object mapped to a storage or a table alias.
             *  R is an explicit return type. This type must have `push_back(O &&)` function. Defaults to `std::vector<O>`
             *  @return All objects of type O stored in database at the moment in `R`.
             *  @example: storage.get_all<User, std::list<User>>(); - SELECT * FROM users
             *  @example: storage.get_all<User, std::list<User>>(where(like(&User::name, "N%")), order_by(&User::id)); - SELECT * FROM users WHERE name LIKE 'N%' ORDER BY id
            */
            template<class T, class R = std::vector<mapped_type_proxy_t<T>>, class... Args>
            R get_all(Args&&... args) {
                this->assert_mapped_type<mapped_type_proxy_t<T>>();
                auto statement = this->prepare(sqlite_orm::get_all<T, R>(std::forward<Args>(args)...));
                return this->execute(statement);
            }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
            /**
             *  SELECT * routine.
             *  `mapped` is an explicitly specified table reference or table alias of an object to be extracted.
             *  `R` is the container return type, which must have a `R::push_back(O&&)` method, and defaults to `std::vector<O>`
             *  @return All objects stored in database.
             *  @example: storage.get_all<sqlite_schema, std::list<sqlite_master>>(); - SELECT sqlite_schema.* FROM sqlite_master AS sqlite_schema
            */
            template<orm_refers_to_table auto mapped,
                     class R = std::vector<mapped_type_proxy_t<decltype(mapped)>>,
                     class... Args>
            R get_all(Args&&... args) {
                this->assert_mapped_type<mapped_type_proxy_t<decltype(mapped)>>();
                auto statement = this->prepare(sqlite_orm::get_all<mapped, R>(std::forward<Args>(args)...));
                return this->execute(statement);
            }
#endif

            /**
             *  SELECT * routine.
             *  O is an object type to be extracted. Must be specified explicitly.
             *  R is a container type. std::vector<std::unique_ptr<O>> is default
             *  @return All objects of type O as std::unique_ptr<O> stored in database at the moment.
             *  @example: storage.get_all_pointer<User, std::list<std::unique_ptr<User>>>(); - SELECT * FROM users
             *  @example: storage.get_all_pointer<User, std::list<std::unique_ptr<User>>>(where(length(&User::name) > 6)); - SELECT * FROM users WHERE LENGTH(name)  > 6
            */
            template<class O, class R = std::vector<std::unique_ptr<O>>, class... Args>
            auto get_all_pointer(Args&&... args) {
                this->assert_mapped_type<O>();
                auto statement = this->prepare(sqlite_orm::get_all_pointer<O, R>(std::forward<Args>(args)...));
                return this->execute(statement);
            }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
            template<orm_table_reference auto table,
                     class R = std::vector<std::unique_ptr<auto_decay_table_ref_t<table>>>,
                     class... Args>
            auto get_all_pointer(Args&&... args) {
                return this->get_all_pointer<auto_decay_table_ref_t<table>>(std::forward<Args>(args)...);
            }
#endif

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
            /**
             *  SELECT * routine.
             *  O is an object type to be extracted. Must be specified explicitly.
             *  R is a container type. std::vector<std::optional<O>> is default
             *  @return All objects of type O as std::optional<O> stored in database at the moment.
             *  @example: storage.get_all_optional<User, std::list<std::optional<O>>>(); - SELECT * FROM users
             *  @example: storage.get_all_optional<User, std::list<std::optional<O>>>(where(length(&User::name) > 6)); - SELECT * FROM users WHERE LENGTH(name)  > 6
            */
            template<class O, class R = std::vector<std::optional<O>>, class... Args>
            auto get_all_optional(Args&&... conditions) {
                this->assert_mapped_type<O>();
                auto statement = this->prepare(sqlite_orm::get_all_optional<O, R>(std::forward<Args>(conditions)...));
                return this->execute(statement);
            }
#endif

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
            template<orm_table_reference auto table,
                     class R = std::vector<std::optional<auto_decay_table_ref_t<table>>>,
                     class... Args>
            auto get_all_optional(Args&&... conditions) {
                return this->get_all_optional<auto_decay_table_ref_t<table>>(std::forward<Args>(conditions)...);
            }
#endif

            /**
             *  Select * by id routine.
             *  throws std::system_error{orm_error_code::not_found} if object not found with given
             * id. throws std::system_error with orm_error_category in case of db error. O is an object type to be
             * extracted. Must be specified explicitly.
             *  @return Object of type O where id is equal parameter passed or throws
             * `std::system_error{orm_error_code::not_found}` if there is no object with such id.
             */
            template<class O, class... Ids>
            O get(Ids... ids) {
                this->assert_mapped_type<O>();
                auto statement = this->prepare(sqlite_orm::get<O>(std::forward<Ids>(ids)...));
                return this->execute(statement);
            }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
            template<orm_table_reference auto table, class... Ids>
            auto get(Ids... ids) {
                return this->get<auto_decay_table_ref_t<table>>(std::forward<Ids>(ids)...);
            }
#endif

            /**
             *  The same as `get` function but doesn't throw an exception if noting found but returns std::unique_ptr
             * with null value. throws std::system_error in case of db error.
             */
            template<class O, class... Ids>
            std::unique_ptr<O> get_pointer(Ids... ids) {
                this->assert_mapped_type<O>();
                auto statement = this->prepare(sqlite_orm::get_pointer<O>(std::forward<Ids>(ids)...));
                return this->execute(statement);
            }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
            template<orm_table_reference auto table, class... Ids>
            auto get_pointer(Ids... ids) {
                return this->get_pointer<auto_decay_table_ref_t<table>>(std::forward<Ids>(ids)...);
            }
#endif

            /**
             * A previous version of get_pointer() that returns a shared_ptr
             * instead of a unique_ptr. New code should prefer get_pointer()
             * unless the data needs to be shared.
             *
             * @note
             * Most scenarios don't need shared ownership of data, so we should prefer
             * unique_ptr when possible. It's more efficient, doesn't require atomic
             * ops for a reference count (which can cause major slowdowns on
             * weakly-ordered platforms like ARM), and can be easily promoted to a
             * shared_ptr, exactly like we're doing here.
             * (Conversely, you _can't_ go from shared back to unique.)
             */
            template<class O, class... Ids>
            std::shared_ptr<O> get_no_throw(Ids... ids) {
                return std::shared_ptr<O>(this->get_pointer<O>(std::forward<Ids>(ids)...));
            }

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
            /**
             *  The same as `get` function but doesn't throw an exception if noting found but
             * returns an empty std::optional. throws std::system_error in case of db error.
             */
            template<class O, class... Ids>
            std::optional<O> get_optional(Ids... ids) {
                this->assert_mapped_type<O>();
                auto statement = this->prepare(sqlite_orm::get_optional<O>(std::forward<Ids>(ids)...));
                return this->execute(statement);
            }
#endif  // SQLITE_ORM_OPTIONAL_SUPPORTED

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
            template<orm_table_reference auto table, class... Ids>
            auto get_optional(Ids... ids) {
                return this->get_optional<auto_decay_table_ref_t<table>>(std::forward<Ids>(ids)...);
            }
#endif

            /**
             *  SELECT COUNT(*) https://www.sqlite.org/lang_aggfunc.html#count
             *  @return Number of O object in table.
             */
            template<class O, class... Args>
            int count(Args&&... args) {
                using R = mapped_type_proxy_t<O>;
                this->assert_mapped_type<R>();
                auto rows = this->select(sqlite_orm::count<R>(), std::forward<Args>(args)...);
                if(!rows.empty()) {
                    return rows.front();
                } else {
                    return 0;
                }
            }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
            template<orm_refers_to_table auto mapped, class... Args>
            int count(Args&&... args) {
                return this->count<auto_decay_table_ref_t<mapped>>(std::forward<Args>(args)...);
            }
#endif

            /**
             *  SELECT COUNT(X) https://www.sqlite.org/lang_aggfunc.html#count
             *  @param m member pointer to class mapped to the storage.
             *  @return count of `m` values from database.
             */
            template<class F,
                     class... Args,
                     std::enable_if_t<polyfill::disjunction<std::is_member_pointer<F>, is_column_pointer<F>>::value,
                                      bool> = true>
            int count(F field, Args&&... args) {
                this->assert_mapped_type<table_type_of_t<F>>();
                auto rows = this->select(sqlite_orm::count(std::move(field)), std::forward<Args>(args)...);
                if(!rows.empty()) {
                    return rows.front();
                } else {
                    return 0;
                }
            }

            /**
             *  AVG(X) query.   https://www.sqlite.org/lang_aggfunc.html#avg
             *  @param m is a class member pointer (the same you passed into make_column).
             *  @return average value from database.
             */
            template<class F,
                     class... Args,
                     std::enable_if_t<polyfill::disjunction<std::is_member_pointer<F>, is_column_pointer<F>>::value,
                                      bool> = true>
            double avg(F field, Args&&... args) {
                this->assert_mapped_type<table_type_of_t<F>>();
                auto rows = this->select(sqlite_orm::avg(std::move(field)), std::forward<Args>(args)...);
                if(!rows.empty()) {
                    return rows.front();
                } else {
                    return 0;
                }
            }

            template<class F,
                     std::enable_if_t<polyfill::disjunction<std::is_member_pointer<F>, is_column_pointer<F>>::value,
                                      bool> = true>
            std::string group_concat(F field) {
                return this->group_concat_internal(std::move(field), {});
            }

            /**
             *  GROUP_CONCAT(X) query.  https://www.sqlite.org/lang_aggfunc.html#groupconcat
             *  @param m is a class member pointer (the same you passed into make_column).
             *  @return group_concat query result.
             */
            template<class F,
                     class... Args,
                     class Tuple = std::tuple<Args...>,
                     std::enable_if_t<std::tuple_size<Tuple>::value >= 1, bool> = true,
                     std::enable_if_t<polyfill::disjunction<std::is_member_pointer<F>, is_column_pointer<F>>::value,
                                      bool> = true>
            std::string group_concat(F field, Args&&... args) {
                return this->group_concat_internal(std::move(field), {}, std::forward<Args>(args)...);
            }

            /**
             *  GROUP_CONCAT(X, Y) query.   https://www.sqlite.org/lang_aggfunc.html#groupconcat
             *  @param m is a class member pointer (the same you passed into make_column).
             *  @return group_concat query result.
             */
            template<class F,
                     class... Args,
                     std::enable_if_t<polyfill::disjunction<std::is_member_pointer<F>, is_column_pointer<F>>::value,
                                      bool> = true>
            std::string group_concat(F field, std::string y, Args&&... args) {
                return this->group_concat_internal(std::move(field),
                                                   std::make_unique<std::string>(std::move(y)),
                                                   std::forward<Args>(args)...);
            }

            template<class F,
                     class... Args,
                     std::enable_if_t<polyfill::disjunction<std::is_member_pointer<F>, is_column_pointer<F>>::value,
                                      bool> = true>
            std::string group_concat(F field, const char* y, Args&&... args) {
                std::unique_ptr<std::string> str;
                if(y) {
                    str = std::make_unique<std::string>(y);
                } else {
                    str = std::make_unique<std::string>();
                }
                return this->group_concat_internal(std::move(field), std::move(str), std::forward<Args>(args)...);
            }

            /**
             *  MAX(x) query.
             *  @param m is a class member pointer (the same you passed into make_column).
             *  @return std::unique_ptr with max value or null if sqlite engine returned null.
             */
            template<class F,
                     class... Args,
                     class R = column_result_of_t<db_objects_type, F>,
                     std::enable_if_t<polyfill::disjunction<std::is_member_pointer<F>, is_column_pointer<F>>::value,
                                      bool> = true>
            std::unique_ptr<R> max(F field, Args&&... args) {
                this->assert_mapped_type<table_type_of_t<F>>();
                auto rows = this->select(sqlite_orm::max(std::move(field)), std::forward<Args>(args)...);
                if(!rows.empty()) {
                    return std::move(rows.front());
                } else {
                    return {};
                }
            }

            /**
             *  MIN(x) query.
             *  @param m is a class member pointer (the same you passed into make_column).
             *  @return std::unique_ptr with min value or null if sqlite engine returned null.
             */
            template<class F,
                     class... Args,
                     class R = column_result_of_t<db_objects_type, F>,
                     std::enable_if_t<polyfill::disjunction<std::is_member_pointer<F>, is_column_pointer<F>>::value,
                                      bool> = true>
            std::unique_ptr<R> min(F field, Args&&... args) {
                this->assert_mapped_type<table_type_of_t<F>>();
                auto rows = this->select(sqlite_orm::min(std::move(field)), std::forward<Args>(args)...);
                if(!rows.empty()) {
                    return std::move(rows.front());
                } else {
                    return {};
                }
            }

            /**
             *  SUM(x) query.
             *  @param m is a class member pointer (the same you passed into make_column).
             *  @return std::unique_ptr with sum value or null if sqlite engine returned null.
             */
            template<class F,
                     class... Args,
                     class R = column_result_of_t<db_objects_type, F>,
                     std::enable_if_t<polyfill::disjunction<std::is_member_pointer<F>, is_column_pointer<F>>::value,
                                      bool> = true>
            std::unique_ptr<R> sum(F field, Args&&... args) {
                this->assert_mapped_type<table_type_of_t<F>>();
                std::vector<std::unique_ptr<double>> rows =
                    this->select(sqlite_orm::sum(std::move(field)), std::forward<Args>(args)...);
                if(!rows.empty()) {
                    if(rows.front()) {
                        return std::make_unique<R>(std::move(*rows.front()));
                    } else {
                        return {};
                    }
                } else {
                    return {};
                }
            }

            /**
             *  TOTAL(x) query.
             *  @param m is a class member pointer (the same you passed into make_column).
             *  @return total value (the same as SUM but not nullable. More details here
             * https://www.sqlite.org/lang_aggfunc.html)
             */
            template<class F,
                     class... Args,
                     std::enable_if_t<polyfill::disjunction<std::is_member_pointer<F>, is_column_pointer<F>>::value,
                                      bool> = true>
            double total(F field, Args&&... args) {
                this->assert_mapped_type<table_type_of_t<F>>();
                auto rows = this->select(sqlite_orm::total(std::move(field)), std::forward<Args>(args)...);
                if(!rows.empty()) {
                    return std::move(rows.front());
                } else {
                    return {};
                }
            }

            /**
             *  Select a single column into std::vector<T> or multiple columns into std::vector<std::tuple<...>>.
             *  For a single column use `auto rows = storage.select(&User::id, where(...));
             *  For multicolumns use `auto rows = storage.select(columns(&User::id, &User::name), where(...));
             */
            template<class T, class... Args>
            auto select(T m, Args... args) {
                static_assert(!is_compound_operator_v<T> || sizeof...(Args) == 0,
                              "Cannot use args with a compound operator");
                auto statement = this->prepare(sqlite_orm::select(std::move(m), std::forward<Args>(args)...));
                return this->execute(statement);
            }

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
            /**
             *  Using a CTE, select a single column into std::vector<T> or multiple columns into std::vector<std::tuple<...>>.
             */
            template<class CTE, class E>
            auto with(CTE cte, E expression) {
                auto statement = this->prepare(sqlite_orm::with(std::move(cte), std::move(expression)));
                return this->execute(statement);
            }

            /**
             *  Using a CTE, select a single column into std::vector<T> or multiple columns into std::vector<std::tuple<...>>.
             */
            template<class... CTEs, class E>
            auto with(common_table_expressions<CTEs...> cte, E expression) {
                auto statement = this->prepare(sqlite_orm::with(std::move(cte), std::move(expression)));
                return this->execute(statement);
            }

            /**
             *  Using a CTE, select a single column into std::vector<T> or multiple columns into std::vector<std::tuple<...>>.
             */
            template<class CTE, class E>
            auto with_recursive(CTE cte, E expression) {
                auto statement = this->prepare(sqlite_orm::with_recursive(std::move(cte), std::move(expression)));
                return this->execute(statement);
            }

            /**
             *  Using a CTE, select a single column into std::vector<T> or multiple columns into std::vector<std::tuple<...>>.
             */
            template<class... CTEs, class E>
            auto with_recursive(common_table_expressions<CTEs...> cte, E expression) {
                auto statement = this->prepare(sqlite_orm::with_recursive(std::move(cte), std::move(expression)));
                return this->execute(statement);
            }
#endif

            template<class T, satisfies<is_prepared_statement, T> = true>
            std::string dump(const T& preparedStatement, bool parametrized = true) const {
                return this->dump_highest_level(preparedStatement.expression, parametrized);
            }

            template<class E,
                     class Ex = polyfill::remove_cvref_t<E>,
                     std::enable_if_t<!is_prepared_statement<Ex>::value && !is_mapped<db_objects_type, Ex>::value,
                                      bool> = true>
            std::string dump(E&& expression, bool parametrized = false) const {
                static_assert(is_preparable_v<self, Ex>, "Expression must be a high-level statement");

                decltype(auto) e2 = static_if<is_select<Ex>::value>(
                    [](auto expression) -> auto {
                        expression.highest_level = true;
                        return expression;
                    },
                    [](const auto& expression) -> decltype(auto) {
                        return (expression);
                    })(std::forward<E>(expression));
                return this->dump_highest_level(e2, parametrized);
            }

            /**
             *  Returns a string representation of object of a class mapped to the storage.
             *  Type of string has json-like style.
             */
            template<class O, satisfies<is_mapped, db_objects_type, O> = true>
            std::string dump(const O& object) const {
                auto& table = this->get_table<O>();
                std::stringstream ss;
                ss << "{ ";
                table.for_each_column([&ss, &object, first = true](auto& column) mutable {
                    using column_type = std::decay_t<decltype(column)>;
                    using field_type = typename column_type::field_type;
                    constexpr std::array<const char*, 2> sep = {", ", ""};

                    ss << sep[std::exchange(first, false)] << column.name << " : '"
                       << field_printer<field_type>{}(polyfill::invoke(column.member_pointer, object)) << "'";
                });
                ss << " }";
                return ss.str();
            }

            /**
             *  This is REPLACE (INSERT OR REPLACE) function.
             *  Also if you need to insert value with knows id you should
             *  also you this function instead of insert cause inserts ignores
             *  id and creates own one.
             */
            template<class O>
            void replace(const O& o) {
                this->assert_mapped_type<O>();
                auto statement = this->prepare(sqlite_orm::replace(std::ref(o)));
                this->execute(statement);
            }

            template<class It, class Projection = polyfill::identity>
            void replace_range(It from, It to, Projection project = {}) {
                using O = std::decay_t<decltype(polyfill::invoke(project, *from))>;
                this->assert_mapped_type<O>();
                if(from == to) {
                    return;
                }

                auto statement =
                    this->prepare(sqlite_orm::replace_range(std::move(from), std::move(to), std::move(project)));
                this->execute(statement);
            }

            template<class O, class It, class Projection = polyfill::identity>
            void replace_range(It from, It to, Projection project = {}) {
                this->assert_mapped_type<O>();
                if(from == to) {
                    return;
                }

                auto statement =
                    this->prepare(sqlite_orm::replace_range<O>(std::move(from), std::move(to), std::move(project)));
                this->execute(statement);
            }

            template<class O, class... Cols>
            int insert(const O& o, columns_t<Cols...> cols) {
                static_assert(cols.count > 0, "Use insert or replace with 1 argument instead");
                this->assert_mapped_type<O>();
                auto statement = this->prepare(sqlite_orm::insert(std::ref(o), std::move(cols)));
                return int(this->execute(statement));
            }

            /**
             *  Insert routine. Inserts object with all non primary key fields in passed object. Id of passed
             *  object doesn't matter.
             *  @return id of just created object.
             */
            template<class O>
            int insert(const O& o) {
                this->assert_mapped_type<O>();
                this->assert_insertable_type<O>();
                auto statement = this->prepare(sqlite_orm::insert(std::ref(o)));
                return int(this->execute(statement));
            }

            /**
             *  Raw insert routine. Use this if `insert` with object does not fit you. This insert is designed to be able
             *  to call any type of `INSERT` query with no limitations.
             *  @example
             *  ```sql
             *  INSERT INTO users (id, name) VALUES(5, 'Little Mix')
             *  ```
             *  will be
             *  ```c++
             *  storage.insert(into<User>, columns(&User::id, &User::name), values(std::make_tuple(5, "Little Mix")));
             *  ```
             *  One more example:
             *  ```sql
             *  INSERT INTO singers (name) VALUES ('Sofia Reyes')('Kungs')
             *  ```
             *  will be
             *  ```c++
             *  storage.insert(into<Singer>(), columns(&Singer::name), values(std::make_tuple("Sofia Reyes"), std::make_tuple("Kungs")));
             *  ```
             *  One can use `default_values` to add `DEFAULT VALUES` modifier:
             *  ```sql
             *  INSERT INTO users DEFAULT VALUES
             *  ```
             *  will be
             *  ```c++
             *  storage.insert(into<Singer>(), default_values());
             *  ```
             *  Also one can use `INSERT OR ABORT`/`INSERT OR FAIL`/`INSERT OR IGNORE`/`INSERT OR REPLACE`/`INSERT ROLLBACK`:
             *  ```c++
             *  storage.insert(or_ignore(), into<Singer>(), columns(&Singer::name), values(std::make_tuple("Sofia Reyes"), std::make_tuple("Kungs")));
             *  storage.insert(or_rollback(), into<Singer>(), default_values());
             *  storage.insert(or_abort(), into<User>, columns(&User::id, &User::name), values(std::make_tuple(5, "Little Mix")));
             *  ```
             */
            template<class... Args>
            void insert(Args... args) {
                auto statement = this->prepare(sqlite_orm::insert(std::forward<Args>(args)...));
                this->execute(statement);
            }

            /**
             *  Raw replace statement creation routine. Use this if `replace` with object does not fit you. This replace is designed to be able
             *  to call any type of `REPLACE` query with no limitations. Actually this is the same query as raw insert except `OR...` option existance.
             *  @example
             *  ```sql
             *  REPLACE INTO users (id, name) VALUES(5, 'Little Mix')
             *  ```
             *  will be
             *  ```c++
             *  storage.prepare(replace(into<User>, columns(&User::id, &User::name), values(std::make_tuple(5, "Little Mix"))));
             *  ```
             *  One more example:
             *  ```sql
             *  REPLACE INTO singers (name) VALUES ('Sofia Reyes')('Kungs')
             *  ```
             *  will be
             *  ```c++
             *  storage.prepare(replace(into<Singer>(), columns(&Singer::name), values(std::make_tuple("Sofia Reyes"), std::make_tuple("Kungs"))));
             *  ```
             *  One can use `default_values` to add `DEFAULT VALUES` modifier:
             *  ```sql
             *  REPLACE INTO users DEFAULT VALUES
             *  ```
             *  will be
             *  ```c++
             *  storage.prepare(replace(into<Singer>(), default_values()));
             *  ```
             */
            template<class... Args>
            void replace(Args... args) {
                auto statement = this->prepare(sqlite_orm::replace(std::forward<Args>(args)...));
                this->execute(statement);
            }

            template<class It, class Projection = polyfill::identity>
            void insert_range(It from, It to, Projection project = {}) {
                using O = std::decay_t<decltype(polyfill::invoke(std::declval<Projection>(), *std::declval<It>()))>;
                this->assert_mapped_type<O>();
                this->assert_insertable_type<O>();
                if(from == to) {
                    return;
                }
                auto statement =
                    this->prepare(sqlite_orm::insert_range(std::move(from), std::move(to), std::move(project)));
                this->execute(statement);
            }

            template<class O, class It, class Projection = polyfill::identity>
            void insert_range(It from, It to, Projection project = {}) {
                this->assert_mapped_type<O>();
                this->assert_insertable_type<O>();
                if(from == to) {
                    return;
                }
                auto statement =
                    this->prepare(sqlite_orm::insert_range<O>(std::move(from), std::move(to), std::move(project)));
                this->execute(statement);
            }

            /**
             * Change table name inside storage's schema info. This function does not
             * affect database
             */
            template<class O>
            void rename_table(std::string name) {
                this->assert_mapped_type<O>();
                auto& table = this->get_table<O>();
                table.name = std::move(name);
            }

            using storage_base::rename_table;

            /**
             * Get table's name stored in storage's schema info. This function does not call
             * any SQLite queries
             */
            template<class O>
            const std::string& tablename() const {
                this->assert_mapped_type<O>();
                auto& table = this->get_table<O>();
                return table.name;
            }

            template<class F, class O>
            [[deprecated("Use the more accurately named function `find_column_name()`")]] const std::string*
            column_name(F O::*memberPointer) const {
                return internal::find_column_name(this->db_objects, memberPointer);
            }

            template<class F, class O>
            const std::string* find_column_name(F O::*memberPointer) const {
                return internal::find_column_name(this->db_objects, memberPointer);
            }

          protected:
            template<class M>
            sync_schema_result schema_status(const virtual_table_t<M>&, sqlite3*, bool, bool*) {
                return sync_schema_result::already_in_sync;
            }

            template<class T, class... S>
            sync_schema_result schema_status(const trigger_t<T, S...>&, sqlite3*, bool, bool*) {
                return sync_schema_result::already_in_sync;
            }

            template<class... Cols>
            sync_schema_result schema_status(const index_t<Cols...>&, sqlite3*, bool, bool*) {
                return sync_schema_result::already_in_sync;
            }

            template<class T, bool WithoutRowId, class... Cs>
            sync_schema_result schema_status(const table_t<T, WithoutRowId, Cs...>& table,
                                             sqlite3* db,
                                             bool preserve,
                                             bool* attempt_to_preserve) {
                if(attempt_to_preserve) {
                    *attempt_to_preserve = true;
                }

                auto dbTableInfo = this->pragma.table_xinfo(table.name);
                auto res = sync_schema_result::already_in_sync;

                //  first let's see if table with such name exists..
                auto gottaCreateTable = !this->table_exists(db, table.name);
                if(!gottaCreateTable) {

                    //  get table info provided in `make_table` call..
                    auto storageTableInfo = table.get_table_info();

                    //  this vector will contain pointers to columns that gotta be added..
                    std::vector<const table_xinfo*> columnsToAdd;

                    if(calculate_remove_add_columns(columnsToAdd, storageTableInfo, dbTableInfo)) {
                        gottaCreateTable = true;
                    }

                    if(!gottaCreateTable) {  //  if all storage columns are equal to actual db columns but there are
                        //  excess columns at the db..
                        if(!dbTableInfo.empty()) {
                            // extra table columns than storage columns
                            if(!preserve) {
#if SQLITE_VERSION_NUMBER >= 3035000  //  DROP COLUMN feature exists (v3.35.0)
                                res = sync_schema_result::old_columns_removed;
#else
                                gottaCreateTable = true;
#endif
                            } else {
                                res = sync_schema_result::old_columns_removed;
                            }
                        }
                    }
                    if(gottaCreateTable) {
                        res = sync_schema_result::dropped_and_recreated;
                    } else {
                        if(!columnsToAdd.empty()) {
                            // extra storage columns than table columns
                            for(const table_xinfo* colInfo: columnsToAdd) {
                                const basic_generated_always::storage_type* generatedStorageType =
                                    table.find_column_generated_storage_type(colInfo->name);
                                if(generatedStorageType) {
                                    if(*generatedStorageType == basic_generated_always::storage_type::stored) {
                                        gottaCreateTable = true;
                                        break;
                                    }
                                    //  fallback cause VIRTUAL can be added
                                } else {
                                    if(colInfo->notnull && colInfo->dflt_value.empty()) {
                                        gottaCreateTable = true;
                                        // no matter if preserve is true or false, there is no way to preserve data, so we wont try!
                                        if(attempt_to_preserve) {
                                            *attempt_to_preserve = false;
                                        };
                                        break;
                                    }
                                }
                            }
                            if(!gottaCreateTable) {
                                if(res == sync_schema_result::old_columns_removed) {
                                    res = sync_schema_result::new_columns_added_and_old_columns_removed;
                                } else {
                                    res = sync_schema_result::new_columns_added;
                                }
                            } else {
                                res = sync_schema_result::dropped_and_recreated;
                            }
                        } else {
                            if(res != sync_schema_result::old_columns_removed) {
                                res = sync_schema_result::already_in_sync;
                            }
                        }
                    }
                } else {
                    res = sync_schema_result::new_table_created;
                }
                return res;
            }

            template<class M>
            sync_schema_result sync_table(const virtual_table_t<M>& virtualTable, sqlite3* db, bool) {
                auto res = sync_schema_result::already_in_sync;
                using context_t = serializer_context<db_objects_type>;
                context_t context{this->db_objects};
                auto query = serialize(virtualTable, context);
                perform_void_exec(db, query);
                return res;
            }

            template<class... Cols>
            sync_schema_result sync_table(const index_t<Cols...>& index, sqlite3* db, bool) {
                auto res = sync_schema_result::already_in_sync;
                using context_t = serializer_context<db_objects_type>;
                context_t context{this->db_objects};
                auto query = serialize(index, context);
                perform_void_exec(db, query);
                return res;
            }

            template<class... Cols>
            sync_schema_result sync_table(const trigger_t<Cols...>& trigger, sqlite3* db, bool) {
                auto res = sync_schema_result::already_in_sync;  // TODO Change accordingly
                using context_t = serializer_context<db_objects_type>;
                context_t context{this->db_objects};
                auto query = serialize(trigger, context);
                perform_void_exec(db, query);
                return res;
            }

            template<class Table, satisfies<is_table, Table> = true>
            sync_schema_result sync_table(const Table& table, sqlite3* db, bool preserve);

            template<class C>
            void add_column(sqlite3* db, const std::string& tableName, const C& column) const {
                using context_t = serializer_context<db_objects_type>;

                context_t context{this->db_objects};
                std::stringstream ss;
                ss << "ALTER TABLE " << streaming_identifier(tableName) << " ADD COLUMN " << serialize(column, context)
                   << std::flush;
                perform_void_exec(db, ss.str());
            }

            template<class ColResult, class S>
            auto execute_select(const S& statement) {
                sqlite3_stmt* stmt = reset_stmt(statement.stmt);

                iterate_ast(statement.expression, conditional_binder{stmt});

                using R = decltype(make_row_extractor<ColResult>(this->db_objects).extract(nullptr, 0));
                std::vector<R> res;
                perform_steps(
                    stmt,
                    [rowExtractor = make_row_extractor<ColResult>(this->db_objects), &res](sqlite3_stmt* stmt) {
                        res.push_back(rowExtractor.extract(stmt, 0));
                    });
                res.shrink_to_fit();
                return res;
            }

            template<class E>
            std::string dump_highest_level(E&& expression, bool parametrized) const {
                const auto& exprDBOs = db_objects_for_expression(this->db_objects, expression);
                using context_t = serializer_context<polyfill::remove_cvref_t<decltype(exprDBOs)>>;
                context_t context{exprDBOs};
                context.replace_bindable_with_question = parametrized;
                // just like prepare_impl()
                context.skip_table_name = false;
                return serialize(expression, context);
            }

            template<typename S>
            prepared_statement_t<S> prepare_impl(S statement) {
                const auto& exprDBOs = db_objects_for_expression(this->db_objects, statement);
                using context_t = serializer_context<polyfill::remove_cvref_t<decltype(exprDBOs)>>;
                context_t context{exprDBOs};
                context.skip_table_name = false;
                context.replace_bindable_with_question = true;

                auto con = this->get_connection();
                std::string sql = serialize(statement, context);
                sqlite3_stmt* stmt = prepare_stmt(con.get(), std::move(sql));
                return prepared_statement_t<S>{std::forward<S>(statement), stmt, con};
            }

          public:
            /**
             *  This is a cute function used to replace migration up/down functionality.
             *  It performs check storage schema with actual db schema and:
             *  * if there are excess tables exist in db they are ignored (not dropped)
             *  * every table from storage is compared with it's db analog and
             *      * if table doesn't exist it is being created
             *      * if table exists its colums are being compared with table_info from db and
             *          * if there are columns in db that do not exist in storage (excess) table will be dropped and
             * recreated
             *          * if there are columns in storage that do not exist in db they will be added using `ALTER TABLE
             * ... ADD COLUMN ...' command
             *          * if there is any column existing in both db and storage but differs by any of
             * properties/constraints (pk, notnull, dflt_value) table will be dropped and recreated. Be aware that
             * `sync_schema` doesn't guarantee that data will not be dropped. It guarantees only that it will make db
             * schema the same as you specified in `make_storage` function call. A good point is that if you have no db
             * file at all it will be created and all tables also will be created with exact tables and columns you
             * specified in `make_storage`, `make_table` and `make_column` calls. The best practice is to call this
             * function right after storage creation.
             *  @param preserve affects function's behaviour in case it is needed to remove a column. If it is `false`
             * so table will be dropped if there is column to remove if SQLite version is < 3.35.0 and remove column if SQLite version >= 3.35.0,
             * if `true` -  table is being copied into another table, dropped and copied table is renamed with source table name.
             * Warning: sync_schema doesn't check foreign keys cause it is unable to do so in sqlite3. If you know how to get foreign key info please
             * submit an issue https://github.com/fnc12/sqlite_orm/issues
             *  @return std::map with std::string key equal table name and `sync_schema_result` as value.
             * `sync_schema_result` is a enum value that stores table state after syncing a schema. `sync_schema_result`
             * can be printed out on std::ostream with `operator<<`.
             */
            std::map<std::string, sync_schema_result> sync_schema(bool preserve = false) {
                auto con = this->get_connection();
                std::map<std::string, sync_schema_result> result;
                iterate_tuple<true>(this->db_objects, [this, db = con.get(), preserve, &result](auto& schemaObject) {
                    sync_schema_result status = this->sync_table(schemaObject, db, preserve);
                    result.emplace(schemaObject.name, status);
                });
                return result;
            }

            /**
             *  This function returns the same map that `sync_schema` returns but it
             *  doesn't perform `sync_schema` actually - just simulates it in case you want to know
             *  what will happen if you sync your schema.
             */
            std::map<std::string, sync_schema_result> sync_schema_simulate(bool preserve = false) {
                auto con = this->get_connection();
                std::map<std::string, sync_schema_result> result;
                iterate_tuple<true>(this->db_objects, [this, db = con.get(), preserve, &result](auto& schemaObject) {
                    sync_schema_result status = this->schema_status(schemaObject, db, preserve, nullptr);
                    result.emplace(schemaObject.name, status);
                });
                return result;
            }

            using storage_base::table_exists;  // now that it is in storage_base make it into overload set

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
            template<class... CTEs,
                     class E,
                     std::enable_if_t<polyfill::disjunction_v<is_select<E>, is_insert_raw<E>>, bool> = true>
            prepared_statement_t<with_t<E, CTEs...>> prepare(with_t<E, CTEs...> sel) {
                return this->prepare_impl<with_t<E, CTEs...>>(std::move(sel));
            }
#endif

            template<class T, class... Args>
            prepared_statement_t<select_t<T, Args...>> prepare(select_t<T, Args...> statement) {
                statement.highest_level = true;
                return this->prepare_impl(std::move(statement));
            }

            template<class T, class... Args>
            prepared_statement_t<get_all_t<T, Args...>> prepare(get_all_t<T, Args...> statement) {
                return this->prepare_impl(std::move(statement));
            }

            template<class T, class... Args>
            prepared_statement_t<get_all_pointer_t<T, Args...>> prepare(get_all_pointer_t<T, Args...> statement) {
                return this->prepare_impl(std::move(statement));
            }

            template<class... Args>
            prepared_statement_t<replace_raw_t<Args...>> prepare(replace_raw_t<Args...> statement) {
                return this->prepare_impl(std::move(statement));
            }

            template<class... Args>
            prepared_statement_t<insert_raw_t<Args...>> prepare(insert_raw_t<Args...> statement) {
                return this->prepare_impl(std::move(statement));
            }

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
            template<class T, class R, class... Args>
            prepared_statement_t<get_all_optional_t<T, R, Args...>>
            prepare(get_all_optional_t<T, R, Args...> statement) {
                return this->prepare_impl(std::move(statement));
            }
#endif  // SQLITE_ORM_OPTIONAL_SUPPORTED

            template<class S, class... Wargs>
            prepared_statement_t<update_all_t<S, Wargs...>> prepare(update_all_t<S, Wargs...> statement) {
                return this->prepare_impl(std::move(statement));
            }

            template<class T, class... Args>
            prepared_statement_t<remove_all_t<T, Args...>> prepare(remove_all_t<T, Args...> statement) {
                return this->prepare_impl(std::move(statement));
            }

            template<class T, class... Ids>
            prepared_statement_t<get_t<T, Ids...>> prepare(get_t<T, Ids...> statement) {
                return this->prepare_impl(std::move(statement));
            }

            template<class T, class... Ids>
            prepared_statement_t<get_pointer_t<T, Ids...>> prepare(get_pointer_t<T, Ids...> statement) {
                return this->prepare_impl(std::move(statement));
            }

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
            template<class T, class... Ids>
            prepared_statement_t<get_optional_t<T, Ids...>> prepare(get_optional_t<T, Ids...> statement) {
                return this->prepare_impl(std::move(statement));
            }
#endif  // SQLITE_ORM_OPTIONAL_SUPPORTED

            template<class T>
            prepared_statement_t<update_t<T>> prepare(update_t<T> statement) {
                using object_type = expression_object_type_t<decltype(statement)>;
                this->assert_mapped_type<object_type>();
                this->assert_updatable_type<object_type>();
                return this->prepare_impl(std::move(statement));
            }

            template<class T, class... Ids>
            prepared_statement_t<remove_t<T, Ids...>> prepare(remove_t<T, Ids...> statement) {
                using object_type = expression_object_type_t<decltype(statement)>;
                this->assert_mapped_type<object_type>();
                return this->prepare_impl(std::move(statement));
            }

            template<class T>
            prepared_statement_t<insert_t<T>> prepare(insert_t<T> statement) {
                using object_type = expression_object_type_t<decltype(statement)>;
                this->assert_mapped_type<object_type>();
                this->assert_insertable_type<object_type>();
                return this->prepare_impl(std::move(statement));
            }

            template<class T>
            prepared_statement_t<replace_t<T>> prepare(replace_t<T> statement) {
                using object_type = expression_object_type_t<decltype(statement)>;
                this->assert_mapped_type<object_type>();
                return this->prepare_impl(std::move(statement));
            }

            template<class E, satisfies<is_insert_range, E> = true>
            prepared_statement_t<E> prepare(E statement) {
                using object_type = expression_object_type_t<decltype(statement)>;
                this->assert_mapped_type<object_type>();
                this->assert_insertable_type<object_type>();
                return this->prepare_impl(std::move(statement));
            }

            template<class E, satisfies<is_replace_range, E> = true>
            prepared_statement_t<E> prepare(E statement) {
                using object_type = expression_object_type_t<decltype(statement)>;
                this->assert_mapped_type<object_type>();
                return this->prepare_impl(std::move(statement));
            }

            template<class T, class... Cols>
            prepared_statement_t<insert_explicit<T, Cols...>> prepare(insert_explicit<T, Cols...> statement) {
                using object_type = expression_object_type_t<decltype(statement)>;
                this->assert_mapped_type<object_type>();
                return this->prepare_impl(std::move(statement));
            }

            template<class... Args>
            void execute(const prepared_statement_t<replace_raw_t<Args...>>& statement) {
                sqlite3_stmt* stmt = reset_stmt(statement.stmt);
                iterate_ast(statement.expression, conditional_binder{stmt});
                perform_step(stmt);
            }

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
            template<class... CTEs, class E, satisfies<is_insert_raw, E> = true>
            void execute(const prepared_statement_t<with_t<E, CTEs...>>& statement) {
                sqlite3_stmt* stmt = reset_stmt(statement.stmt);
                iterate_ast(statement.expression, conditional_binder{stmt});
                perform_step(stmt);
            }
#endif

            template<class... Args>
            void execute(const prepared_statement_t<insert_raw_t<Args...>>& statement) {
                sqlite3_stmt* stmt = reset_stmt(statement.stmt);
                iterate_ast(statement.expression, conditional_binder{stmt});
                perform_step(stmt);
            }

            template<class T, class... Cols>
            int64 execute(const prepared_statement_t<insert_explicit<T, Cols...>>& statement) {
                using object_type = statement_object_type_t<decltype(statement)>;

                sqlite3_stmt* stmt = reset_stmt(statement.stmt);

                tuple_value_binder{stmt}(
                    statement.expression.columns.columns,
                    [&table = this->get_table<object_type>(), &object = statement.expression.obj](auto& memberPointer) {
                        return table.object_field_value(object, memberPointer);
                    });
                perform_step(stmt);
                return sqlite3_last_insert_rowid(sqlite3_db_handle(stmt));
            }

            template<class T,
                     std::enable_if_t<polyfill::disjunction<is_replace<T>, is_replace_range<T>>::value, bool> = true>
            void execute(const prepared_statement_t<T>& statement) {
                using object_type = statement_object_type_t<decltype(statement)>;

                sqlite3_stmt* stmt = reset_stmt(statement.stmt);

                auto processObject = [&table = this->get_table<object_type>(),
                                      bindValue = field_value_binder{stmt}](auto& object) mutable {
                    table.template for_each_column_excluding<is_generated_always>(
                        call_as_template_base<column_field>([&bindValue, &object](auto& column) {
                            bindValue(polyfill::invoke(column.member_pointer, object));
                        }));
                };

                static_if<is_replace_range<T>::value>(
                    [&processObject](auto& expression) {
#if __cpp_lib_ranges >= 201911L
                        std::ranges::for_each(expression.range.first,
                                              expression.range.second,
                                              std::ref(processObject),
                                              std::ref(expression.transformer));
#else
                        auto& transformer = expression.transformer;
                        std::for_each(expression.range.first,
                                      expression.range.second,
                                      [&processObject, &transformer](auto& item) {
                                          const object_type& object = polyfill::invoke(transformer, item);
                                          processObject(object);
                                      });
#endif
                    },
                    [&processObject](auto& expression) {
                        const object_type& o = get_object(expression);
                        processObject(o);
                    })(statement.expression);

                perform_step(stmt);
            }

            template<class T,
                     std::enable_if_t<polyfill::disjunction<is_insert<T>, is_insert_range<T>>::value, bool> = true>
            int64 execute(const prepared_statement_t<T>& statement) {
                using object_type = statement_object_type_t<decltype(statement)>;

                sqlite3_stmt* stmt = reset_stmt(statement.stmt);

                auto processObject = [&table = this->get_table<object_type>(),
                                      bindValue = field_value_binder{stmt}](auto& object) mutable {
                    using is_without_rowid = typename std::decay_t<decltype(table)>::is_without_rowid;
                    table.template for_each_column_excluding<
                        mpl::conjunction<mpl::not_<mpl::always<is_without_rowid>>,
                                         mpl::disjunction_fn<is_primary_key, is_generated_always>>>(
                        call_as_template_base<column_field>([&table, &bindValue, &object](auto& column) {
                            if(!exists_in_composite_primary_key(table, column)) {
                                bindValue(polyfill::invoke(column.member_pointer, object));
                            }
                        }));
                };

                static_if<is_insert_range<T>::value>(
                    [&processObject](auto& expression) {
#if __cpp_lib_ranges >= 201911L
                        std::ranges::for_each(expression.range.first,
                                              expression.range.second,
                                              std::ref(processObject),
                                              std::ref(expression.transformer));
#else
                        auto& transformer = expression.transformer;
                        std::for_each(expression.range.first,
                                      expression.range.second,
                                      [&processObject, &transformer](auto& item) {
                                          const object_type& object = polyfill::invoke(transformer, item);
                                          processObject(object);
                                      });
#endif
                    },
                    [&processObject](auto& expression) {
                        const object_type& o = get_object(expression);
                        processObject(o);
                    })(statement.expression);

                perform_step(stmt);
                return sqlite3_last_insert_rowid(sqlite3_db_handle(stmt));
            }

            template<class T, class... Ids>
            void execute(const prepared_statement_t<remove_t<T, Ids...>>& statement) {
                sqlite3_stmt* stmt = reset_stmt(statement.stmt);
                iterate_ast(statement.expression.ids, conditional_binder{stmt});
                perform_step(stmt);
            }

            template<class T>
            void execute(const prepared_statement_t<update_t<T>>& statement) {
                using object_type = statement_object_type_t<decltype(statement)>;

                sqlite3_stmt* stmt = reset_stmt(statement.stmt);
                auto& table = this->get_table<object_type>();

                field_value_binder bindValue{stmt};
                auto& object = get_object(statement.expression);
                table.template for_each_column_excluding<mpl::disjunction_fn<is_primary_key, is_generated_always>>(
                    call_as_template_base<column_field>([&table, &bindValue, &object](auto& column) {
                        if(!exists_in_composite_primary_key(table, column)) {
                            bindValue(polyfill::invoke(column.member_pointer, object));
                        }
                    }));
                table.for_each_column([&table, &bindValue, &object](auto& column) {
                    if(column.template is<is_primary_key>() || exists_in_composite_primary_key(table, column)) {
                        bindValue(polyfill::invoke(column.member_pointer, object));
                    }
                });
                perform_step(stmt);
            }

            template<class T, class... Ids>
            std::unique_ptr<T> execute(const prepared_statement_t<get_pointer_t<T, Ids...>>& statement) {
                sqlite3_stmt* stmt = reset_stmt(statement.stmt);

                iterate_ast(statement.expression.ids, conditional_binder{stmt});

                std::unique_ptr<T> res;
                perform_step(stmt, [&table = this->get_table<T>(), &res](sqlite3_stmt* stmt) {
                    res = std::make_unique<T>();
                    object_from_column_builder<T> builder{*res, stmt};
                    table.for_each_column(builder);
                });
                return res;
            }

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
            template<class T, class... Ids>
            std::optional<T> execute(const prepared_statement_t<get_optional_t<T, Ids...>>& statement) {
                sqlite3_stmt* stmt = reset_stmt(statement.stmt);

                iterate_ast(statement.expression.ids, conditional_binder{stmt});

                std::optional<T> res;
                perform_step(stmt, [&table = this->get_table<T>(), &res](sqlite3_stmt* stmt) {
                    object_from_column_builder<T> builder{res.emplace(), stmt};
                    table.for_each_column(builder);
                });
                return res;
            }
#endif  // SQLITE_ORM_OPTIONAL_SUPPORTED

            template<class T, class... Ids>
            T execute(const prepared_statement_t<get_t<T, Ids...>>& statement) {
                sqlite3_stmt* stmt = reset_stmt(statement.stmt);

                iterate_ast(statement.expression.ids, conditional_binder{stmt});

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
                std::optional<T> res;
                perform_step(stmt, [&table = this->get_table<T>(), &res](sqlite3_stmt* stmt) {
                    object_from_column_builder<T> builder{res.emplace(), stmt};
                    table.for_each_column(builder);
                });
                if(!res.has_value()) {
                    throw std::system_error{orm_error_code::not_found};
                }
                return std::move(res).value();
#else
                auto& table = this->get_table<T>();
                auto stepRes = sqlite3_step(stmt);
                switch(stepRes) {
                    case SQLITE_ROW: {
                        T res;
                        object_from_column_builder<T> builder{res, stmt};
                        table.for_each_column(builder);
                        return res;
                    } break;
                    case SQLITE_DONE: {
                        throw std::system_error{orm_error_code::not_found};
                    } break;
                    default: {
                        throw_translated_sqlite_error(stmt);
                    }
                }
#endif
            }

            template<class T, class... Args>
            void execute(const prepared_statement_t<remove_all_t<T, Args...>>& statement) {
                sqlite3_stmt* stmt = reset_stmt(statement.stmt);
                iterate_ast(statement.expression.conditions, conditional_binder{stmt});
                perform_step(stmt);
            }

            template<class S, class... Wargs>
            void execute(const prepared_statement_t<update_all_t<S, Wargs...>>& statement) {
                sqlite3_stmt* stmt = reset_stmt(statement.stmt);
                conditional_binder bindNode{stmt};
                iterate_ast(statement.expression.set, bindNode);
                iterate_ast(statement.expression.conditions, bindNode);
                perform_step(stmt);
            }

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
            template<class... CTEs, class T, class... Args>
            auto execute(const prepared_statement_t<with_t<select_t<T, Args...>, CTEs...>>& statement) {
                using ExprDBOs = decltype(db_objects_for_expression(this->db_objects, statement.expression));
                // note: it is enough to only use the 'expression DBOs' at compile-time to determine the column results;
                // because we cannot select objects/structs from a CTE, passing the permanently defined DBOs are enough.
                using ColResult = column_result_of_t<ExprDBOs, T>;
                return this->execute_select<ColResult>(statement);
            }
#endif

            template<class T, class... Args>
            auto execute(const prepared_statement_t<select_t<T, Args...>>& statement) {
                using ColResult = column_result_of_t<db_objects_type, T>;
                return this->execute_select<ColResult>(statement);
            }

            template<class T, class R, class... Args, class O = mapped_type_proxy_t<T>>
            R execute(const prepared_statement_t<get_all_t<T, R, Args...>>& statement) {
                sqlite3_stmt* stmt = reset_stmt(statement.stmt);

                iterate_ast(statement.expression, conditional_binder{stmt});

                R res;
                perform_steps(stmt, [&table = this->get_table<O>(), &res](sqlite3_stmt* stmt) {
                    O obj;
                    object_from_column_builder<O> builder{obj, stmt};
                    table.for_each_column(builder);
                    res.push_back(std::move(obj));
                });
#ifdef SQLITE_ORM_IF_CONSTEXPR_SUPPORTED
                if constexpr(polyfill::is_specialization_of_v<R, std::vector>) {
                    res.shrink_to_fit();
                }
#endif
                return res;
            }

            template<class T, class R, class... Args>
            R execute(const prepared_statement_t<get_all_pointer_t<T, R, Args...>>& statement) {
                sqlite3_stmt* stmt = reset_stmt(statement.stmt);

                iterate_ast(statement.expression, conditional_binder{stmt});

                R res;
                perform_steps(stmt, [&table = this->get_table<T>(), &res](sqlite3_stmt* stmt) {
                    auto obj = std::make_unique<T>();
                    object_from_column_builder<T> builder{*obj, stmt};
                    table.for_each_column(builder);
                    res.push_back(std::move(obj));
                });
#ifdef SQLITE_ORM_IF_CONSTEXPR_SUPPORTED
                if constexpr(polyfill::is_specialization_of_v<R, std::vector>) {
                    res.shrink_to_fit();
                }
#endif
                return res;
            }

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
            template<class T, class R, class... Args>
            R execute(const prepared_statement_t<get_all_optional_t<T, R, Args...>>& statement) {
                sqlite3_stmt* stmt = reset_stmt(statement.stmt);

                iterate_ast(statement.expression, conditional_binder{stmt});

                R res;
                perform_steps(stmt, [&table = this->get_table<T>(), &res](sqlite3_stmt* stmt) {
                    auto obj = std::make_optional<T>();
                    object_from_column_builder<T> builder{*obj, stmt};
                    table.for_each_column(builder);
                    res.push_back(std::move(obj));
                });
#ifdef SQLITE_ORM_IF_CONSTEXPR_SUPPORTED
                if constexpr(polyfill::is_specialization_of_v<R, std::vector>) {
                    res.shrink_to_fit();
                }
#endif
                return res;
            }
#endif  // SQLITE_ORM_OPTIONAL_SUPPORTED
        };  // struct storage_t
    }

    /*
     *  Factory function for a storage, from a database file and a bunch of database object definitions.
     */
    template<class... DBO>
    internal::storage_t<DBO...> make_storage(std::string filename, DBO... dbObjects) {
        return {std::move(filename), internal::db_objects_tuple<DBO...>{std::forward<DBO>(dbObjects)...}};
    }

    /**
     *  sqlite3_threadsafe() interface.
     */
    inline int threadsafe() {
        return sqlite3_threadsafe();
    }
}
#pragma once

#include <type_traits>  //  std::is_same, std::remove_reference, std::remove_cvref
#include <tuple>  //  std::get

// #include "functional/cxx_universal.h"
//  ::size_t
// #include "functional/cxx_type_traits_polyfill.h"

// #include "functional/static_magic.h"

// #include "type_traits.h"

// #include "prepared_statement.h"

// #include "ast_iterator.h"

// #include "node_tuple.h"

#include <type_traits>  //  std::enable_if
#include <tuple>  //  std::tuple
#include <utility>  //  std::pair
#include <functional>  //  std::reference_wrapper
// #include "functional/cxx_optional.h"

// #include "functional/cxx_type_traits_polyfill.h"

// #include "tuple_helper/tuple_filter.h"

// #include "type_traits.h"

// #include "conditions.h"

// #include "operators.h"

// #include "select_constraints.h"

// #include "prepared_statement.h"

// #include "optional_container.h"

// #include "core_functions.h"

// #include "function.h"

// #include "ast/excluded.h"

// #include "ast/upsert_clause.h"

// #include "ast/where.h"

// #include "ast/into.h"

// #include "ast/group_by.h"

// #include "ast/match.h"

namespace sqlite_orm {
    namespace internal {

        template<class T, class SFINAE = void>
        struct node_tuple {
            using type = std::tuple<T>;
        };

        template<class T>
        using node_tuple_t = typename node_tuple<T>::type;

        /*
         *   Node tuple for several types.
         */
        template<class... T>
        using node_tuple_for = conc_tuple<typename node_tuple<T>::type...>;

        template<>
        struct node_tuple<void, void> {
            using type = std::tuple<>;
        };

        template<class T>
        struct node_tuple<std::reference_wrapper<T>, void> : node_tuple<T> {};

        template<class... Args>
        struct node_tuple<std::tuple<Args...>, void> : node_tuple_for<Args...> {};

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
        template<class T>
        struct node_tuple<as_optional_t<T>, void> : node_tuple<T> {};
#endif  //  SQLITE_ORM_OPTIONAL_SUPPORTED

        template<class... Args>
        struct node_tuple<group_by_t<Args...>, void> : node_tuple_for<Args...> {};

        template<class T, class... Args>
        struct node_tuple<group_by_with_having<T, Args...>, void> : node_tuple_for<Args..., T> {};

#if SQLITE_VERSION_NUMBER >= 3024000
        template<class Targets, class Actions>
        struct node_tuple<upsert_clause<Targets, Actions>, void> : node_tuple<Actions> {};
#endif

        template<class... Args>
        struct node_tuple<set_t<Args...>, void> : node_tuple_for<Args...> {};

        template<class T, class X, class Y, class Z>
        struct node_tuple<highlight_t<T, X, Y, Z>, void> : node_tuple_for<X, Y, Z> {};

        template<class T>
        struct node_tuple<excluded_t<T>, void> : node_tuple<T> {};

        template<class C>
        struct node_tuple<where_t<C>, void> : node_tuple<C> {};

        template<class T, class X>
        struct node_tuple<match_t<T, X>, void> : node_tuple<X> {};

        /**
         *  Column alias
         */
        template<class A>
        struct node_tuple<alias_holder<A>, void> : node_tuple<void> {};

        /**
         *  Column alias
         */
        template<char... C>
        struct node_tuple<column_alias<C...>, void> : node_tuple<void> {};

        /**
         *  Literal
         */
        template<class T>
        struct node_tuple<literal_holder<T>, void> : node_tuple<void> {};

        template<class E>
        struct node_tuple<order_by_t<E>, void> : node_tuple<E> {};

        template<class L, class R>
        struct node_tuple<is_equal_with_table_t<L, R>, void> : node_tuple<R> {};

        template<class T>
        struct node_tuple<T, match_if<is_binary_condition, T>> : node_tuple_for<left_type_t<T>, right_type_t<T>> {};

        template<class T>
        struct node_tuple<T, match_if<is_binary_operator, T>> : node_tuple_for<left_type_t<T>, right_type_t<T>> {};

        template<class... Args>
        struct node_tuple<columns_t<Args...>, void> : node_tuple_for<Args...> {};

        template<class T, class... Args>
        struct node_tuple<struct_t<T, Args...>, void> : node_tuple_for<Args...> {};

        template<class L, class A>
        struct node_tuple<dynamic_in_t<L, A>, void> : node_tuple_for<L, A> {};

        template<class L, class... Args>
        struct node_tuple<in_t<L, Args...>, void> : node_tuple_for<L, Args...> {};

        template<class T>
        struct node_tuple<T, match_if<is_compound_operator, T>> : node_tuple<typename T::expressions_tuple> {};

#if(SQLITE_VERSION_NUMBER >= 3008003) && defined(SQLITE_ORM_WITH_CTE)
        template<class CTE>
        struct node_tuple<CTE, match_specialization_of<CTE, common_table_expression>>
            : node_tuple<typename CTE::expression_type> {};

        template<class With>
        struct node_tuple<With, match_specialization_of<With, with_t>>
            : node_tuple_for<typename With::cte_type, typename With::expression_type> {};
#endif

        template<class T, class... Args>
        struct node_tuple<select_t<T, Args...>, void> : node_tuple_for<T, Args...> {};

        template<class... Args>
        struct node_tuple<insert_raw_t<Args...>, void> : node_tuple_for<Args...> {};

        template<class... Args>
        struct node_tuple<replace_raw_t<Args...>, void> : node_tuple_for<Args...> {};

        template<class T>
        struct node_tuple<into_t<T>, void> : node_tuple<void> {};

        template<class... Args>
        struct node_tuple<values_t<Args...>, void> : node_tuple_for<Args...> {};

        template<class T, class R, class... Args>
        struct node_tuple<get_all_t<T, R, Args...>, void> : node_tuple_for<Args...> {};

        template<class T, class... Args>
        struct node_tuple<get_all_pointer_t<T, Args...>, void> : node_tuple_for<Args...> {};

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
        template<class T, class... Args>
        struct node_tuple<get_all_optional_t<T, Args...>, void> : node_tuple_for<Args...> {};
#endif  // SQLITE_ORM_OPTIONAL_SUPPORTED

        template<class... Args, class... Wargs>
        struct node_tuple<update_all_t<set_t<Args...>, Wargs...>, void> : node_tuple_for<Args..., Wargs...> {};

        template<class T, class... Args>
        struct node_tuple<remove_all_t<T, Args...>, void> : node_tuple_for<Args...> {};

        template<class T, class E>
        struct node_tuple<cast_t<T, E>, void> : node_tuple<E> {};

        template<class T>
        struct node_tuple<exists_t<T>, void> : node_tuple<T> {};

        template<class T>
        struct node_tuple<optional_container<T>, void> : node_tuple<T> {};

        template<class A, class T, class E>
        struct node_tuple<like_t<A, T, E>, void> : node_tuple_for<A, T, E> {};

        template<class A, class T>
        struct node_tuple<glob_t<A, T>, void> : node_tuple_for<A, T> {};

        template<class A, class T>
        struct node_tuple<between_t<A, T>, void> : node_tuple_for<A, T, T> {};

        template<class T>
        struct node_tuple<named_collate<T>, void> : node_tuple<T> {};

        template<class T>
        struct node_tuple<is_null_t<T>, void> : node_tuple<T> {};

        template<class T>
        struct node_tuple<is_not_null_t<T>, void> : node_tuple<T> {};

        template<class C>
        struct node_tuple<negated_condition_t<C>, void> : node_tuple<C> {};

        template<class R, class S, class... Args>
        struct node_tuple<built_in_function_t<R, S, Args...>, void> : node_tuple_for<Args...> {};

        template<class R, class S, class... Args>
        struct node_tuple<built_in_aggregate_function_t<R, S, Args...>, void> : node_tuple_for<Args...> {};

        template<class F, class W>
        struct node_tuple<filtered_aggregate_function<F, W>, void> : node_tuple_for<F, W> {};

        template<class F, class... Args>
        struct node_tuple<function_call<F, Args...>, void> : node_tuple_for<Args...> {};

        template<class T, class O>
        struct node_tuple<left_join_t<T, O>, void> : node_tuple<O> {};

        template<class T>
        struct node_tuple<on_t<T>, void> : node_tuple<T> {};

        // note: not strictly necessary as there's no binding support for USING;
        // we provide it nevertheless, in line with on_t.
        template<class T, class M>
        struct node_tuple<using_t<T, M>, void> : node_tuple<column_pointer<T, M>> {};

        template<class T, class O>
        struct node_tuple<join_t<T, O>, void> : node_tuple<O> {};

        template<class T, class O>
        struct node_tuple<left_outer_join_t<T, O>, void> : node_tuple<O> {};

        template<class T, class O>
        struct node_tuple<inner_join_t<T, O>, void> : node_tuple<O> {};

        template<class R, class T, class E, class... Args>
        struct node_tuple<simple_case_t<R, T, E, Args...>, void> : node_tuple_for<T, Args..., E> {};

        template<class L, class R>
        struct node_tuple<std::pair<L, R>, void> : node_tuple_for<L, R> {};

        template<class T, class E>
        struct node_tuple<as_t<T, E>, void> : node_tuple<E> {};

        template<class T>
        struct node_tuple<limit_t<T, false, false, void>, void> : node_tuple<T> {};

        template<class T, class O>
        struct node_tuple<limit_t<T, true, false, O>, void> : node_tuple_for<T, O> {};

        template<class T, class O>
        struct node_tuple<limit_t<T, true, true, O>, void> : node_tuple_for<O, T> {};
    }
}

// #include "expression_object_type.h"

namespace sqlite_orm {

    template<int N, class It, class L, class O>
    auto& get(internal::prepared_statement_t<internal::insert_range_t<It, L, O>>& statement) {
        return std::get<N>(statement.expression.range);
    }

    template<int N, class It, class L, class O>
    const auto& get(const internal::prepared_statement_t<internal::insert_range_t<It, L, O>>& statement) {
        return std::get<N>(statement.expression.range);
    }

    template<int N, class It, class L, class O>
    auto& get(internal::prepared_statement_t<internal::replace_range_t<It, L, O>>& statement) {
        return std::get<N>(statement.expression.range);
    }

    template<int N, class It, class L, class O>
    const auto& get(const internal::prepared_statement_t<internal::replace_range_t<It, L, O>>& statement) {
        return std::get<N>(statement.expression.range);
    }

    template<int N, class T, class... Ids>
    auto& get(internal::prepared_statement_t<internal::get_t<T, Ids...>>& statement) {
        return internal::get_ref(std::get<N>(statement.expression.ids));
    }

    template<int N, class T, class... Ids>
    const auto& get(const internal::prepared_statement_t<internal::get_t<T, Ids...>>& statement) {
        return internal::get_ref(std::get<N>(statement.expression.ids));
    }

    template<int N, class T, class... Ids>
    auto& get(internal::prepared_statement_t<internal::get_pointer_t<T, Ids...>>& statement) {
        return internal::get_ref(std::get<N>(statement.expression.ids));
    }

    template<int N, class T, class... Ids>
    const auto& get(const internal::prepared_statement_t<internal::get_pointer_t<T, Ids...>>& statement) {
        return internal::get_ref(std::get<N>(statement.expression.ids));
    }

#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
    template<int N, class T, class... Ids>
    auto& get(internal::prepared_statement_t<internal::get_optional_t<T, Ids...>>& statement) {
        return internal::get_ref(std::get<N>(statement.expression.ids));
    }

    template<int N, class T, class... Ids>
    const auto& get(const internal::prepared_statement_t<internal::get_optional_t<T, Ids...>>& statement) {
        return internal::get_ref(std::get<N>(statement.expression.ids));
    }
#endif  // SQLITE_ORM_OPTIONAL_SUPPORTED

    template<int N, class T, class... Ids>
    auto& get(internal::prepared_statement_t<internal::remove_t<T, Ids...>>& statement) {
        return internal::get_ref(std::get<N>(statement.expression.ids));
    }

    template<int N, class T, class... Ids>
    const auto& get(const internal::prepared_statement_t<internal::remove_t<T, Ids...>>& statement) {
        return internal::get_ref(std::get<N>(statement.expression.ids));
    }

    template<int N, class T>
    auto& get(internal::prepared_statement_t<internal::update_t<T>>& statement) {
        static_assert(N == 0, "get<> works only with 0 argument for update statement");
        return internal::get_ref(statement.expression.object);
    }

    template<int N, class T>
    const auto& get(const internal::prepared_statement_t<internal::update_t<T>>& statement) {
        static_assert(N == 0, "get<> works only with 0 argument for update statement");
        return internal::get_ref(statement.expression.object);
    }

    template<int N, class T, class... Cols>
    auto& get(internal::prepared_statement_t<internal::insert_explicit<T, Cols...>>& statement) {
        static_assert(N == 0, "get<> works only with 0 argument for insert statement");
        return internal::get_ref(statement.expression.obj);
    }

    template<int N, class T, class... Cols>
    const auto& get(const internal::prepared_statement_t<internal::insert_explicit<T, Cols...>>& statement) {
        static_assert(N == 0, "get<> works only with 0 argument for insert statement");
        return internal::get_ref(statement.expression.obj);
    }

    template<int N, class T>
    auto& get(internal::prepared_statement_t<internal::replace_t<T>>& statement) {
        static_assert(N == 0, "get<> works only with 0 argument for replace statement");
        return internal::get_ref(statement.expression.object);
    }

    template<int N, class T>
    const auto& get(const internal::prepared_statement_t<internal::replace_t<T>>& statement) {
        static_assert(N == 0, "get<> works only with 0 argument for replace statement");
        return internal::get_ref(statement.expression.object);
    }

    template<int N, class T>
    auto& get(internal::prepared_statement_t<internal::insert_t<T>>& statement) {
        static_assert(N == 0, "get<> works only with 0 argument for insert statement");
        return internal::get_ref(statement.expression.object);
    }

    template<int N, class T>
    const auto& get(const internal::prepared_statement_t<internal::insert_t<T>>& statement) {
        static_assert(N == 0, "get<> works only with 0 argument for insert statement");
        return internal::get_ref(statement.expression.object);
    }

    template<int N, class T>
    const auto& get(const internal::prepared_statement_t<T>& statement) {
        using statement_type = polyfill::remove_cvref_t<decltype(statement)>;
        using expression_type = internal::expression_type_t<statement_type>;
        using node_tuple = internal::node_tuple_t<expression_type>;
        using bind_tuple = internal::bindable_filter_t<node_tuple>;
        using result_type = std::tuple_element_t<static_cast<size_t>(N), bind_tuple>;
        const result_type* result = nullptr;
        internal::iterate_ast(statement.expression, [&result, index = -1](auto& node) mutable {
            using node_type = polyfill::remove_cvref_t<decltype(node)>;
            if(internal::is_bindable<node_type>::value) {
                ++index;
            }
            if(index == N) {
                internal::call_if_constexpr<std::is_same<result_type, node_type>::value>(
                    [](auto& r, auto& n) {
                        r = &n;
                    },
                    result,
                    node);
            }
        });
        return internal::get_ref(*result);
    }

    template<int N, class T>
    auto& get(internal::prepared_statement_t<T>& statement) {
        using statement_type = std::remove_reference_t<decltype(statement)>;
        using expression_type = internal::expression_type_t<statement_type>;
        using node_tuple = internal::node_tuple_t<expression_type>;
        using bind_tuple = internal::bindable_filter_t<node_tuple>;
        using result_type = std::tuple_element_t<static_cast<size_t>(N), bind_tuple>;
        result_type* result = nullptr;

        internal::iterate_ast(statement.expression, [&result, index = -1](auto& node) mutable {
            using node_type = polyfill::remove_cvref_t<decltype(node)>;
            if(internal::is_bindable<node_type>::value) {
                ++index;
            }
            if(index == N) {
                internal::call_if_constexpr<std::is_same<result_type, node_type>::value>(
                    [](auto& r, auto& n) {
                        r = const_cast<std::remove_reference_t<decltype(r)>>(&n);
                    },
                    result,
                    node);
            }
        });
        return internal::get_ref(*result);
    }
}
#pragma once

/*
 *  Note: This feature needs constexpr variables with external linkage.
 *  which can be achieved before C++17's inline variables, but differs from compiler to compiler.
 *  Hence we make it only available for compilers supporting inline variables.
 */

#if SQLITE_VERSION_NUMBER >= 3020000
#ifdef SQLITE_ORM_INLINE_VARIABLES_SUPPORTED
#include <utility>  //  std::move
#ifndef SQLITE_ORM_WITH_CPP20_ALIASES
#include <type_traits>  //  std::integral_constant
#endif
#endif
#endif

// #include "pointer_value.h"

#if SQLITE_VERSION_NUMBER >= 3020000
#ifdef SQLITE_ORM_INLINE_VARIABLES_SUPPORTED
namespace sqlite_orm {

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    inline constexpr orm_pointer_type auto carray_pointer_tag = "carray"_pointer_type;
    // [Deprecation notice] This type is deprecated and will be removed in v1.10. Use the inline variable `carray_pointer_tag` instead.
    using carray_pvt [[deprecated]] = decltype("carray"_pointer_type);

    template<typename P>
    using carray_pointer_arg = pointer_arg_t<P, carray_pointer_tag>;
    template<typename P, typename D>
    using carray_pointer_binding = pointer_binding_t<P, carray_pointer_tag, D>;
    template<typename P>
    using static_carray_pointer_binding = static_pointer_binding_t<P, carray_pointer_tag>;

    /**
     *  Wrap a pointer of type 'carray' and its deleter function for binding it to a statement.
     *  
     *  Unless the deleter yields a nullptr 'xDestroy' function the ownership of the pointed-to-object
     *  is transferred to the pointer binding, which will delete it through
     *  the deleter when the statement finishes.
     */
    template<class P, class D>
    carray_pointer_binding<P, D> bind_carray_pointer(P* p, D d) noexcept {
        return bind_pointer<carray_pointer_tag>(p, std::move(d));
    }

    template<class P>
    static_carray_pointer_binding<P> bind_carray_pointer_statically(P* p) noexcept {
        return bind_pointer_statically<carray_pointer_tag>(p);
    }

    /**
     *  Wrap a pointer of type 'carray' for binding it to a statement.
     *  
     *  Note: 'Static' means that ownership of the pointed-to-object won't be transferred
     *  and sqlite assumes the object pointed to is valid throughout the lifetime of a statement.
     */
    template<class P, class D>
    [[deprecated("Use the better named function `bind_carray_pointer(...)`")]] carray_pointer_binding<P, D>
    bindable_carray_pointer(P* p, D d) noexcept {
        return bind_pointer<carray_pointer_tag>(p, std::move(d));
    }

    template<class P>
    [[deprecated(
        "Use the better named function `bind_carray_pointer_statically(...)` ")]] static_carray_pointer_binding<P>
    statically_bindable_carray_pointer(P* p) noexcept {
        return bind_pointer_statically<carray_pointer_tag>(p);
    }
#else
    inline constexpr const char carray_pointer_name[] = "carray";
    using carray_pointer_type = std::integral_constant<const char*, carray_pointer_name>;
    // [Deprecation notice] This type is deprecated and will be removed in v1.10. Use the alias type `carray_pointer_type` instead.
    using carray_pvt [[deprecated]] = carray_pointer_type;

    template<typename P>
    using carray_pointer_arg = pointer_arg<P, carray_pointer_type>;
    template<typename P, typename D>
    using carray_pointer_binding = pointer_binding<P, carray_pointer_type, D>;
    template<typename P>
    using static_carray_pointer_binding = static_pointer_binding<P, carray_pointer_type>;

    /**
     *  Wrap a pointer of type 'carray' and its deleter function for binding it to a statement.
     *  
     *  Unless the deleter yields a nullptr 'xDestroy' function the ownership of the pointed-to-object
     *  is transferred to the pointer binding, which will delete it through
     *  the deleter when the statement finishes.
     */
    template<class P, class D>
    carray_pointer_binding<P, D> bind_carray_pointer(P* p, D d) noexcept {
        return bind_pointer<carray_pointer_type>(p, std::move(d));
    }

    /**
     *  Wrap a pointer of type 'carray' for binding it to a statement.
     *  
     *  Note: 'Static' means that ownership of the pointed-to-object won't be transferred
     *  and sqlite assumes the object pointed to is valid throughout the lifetime of a statement.
     */
    template<class P>
    static_carray_pointer_binding<P> bind_carray_pointer_statically(P* p) noexcept {
        return bind_pointer_statically<carray_pointer_type>(p);
    }

    template<class P, class D>
    [[deprecated("Use the better named function `bind_carray_pointer(...)`")]] carray_pointer_binding<P, D>
    bindable_carray_pointer(P* p, D d) noexcept {
        return bind_carray_pointer(p, std::move(d));
    }

    template<class P>
    [[deprecated(
        "Use the better named function `bind_carray_pointer_statically(...)` ")]] static_carray_pointer_binding<P>
    statically_bindable_carray_pointer(P* p) noexcept {
        return bind_carray_pointer_statically(p);
    }
#endif

    /**
     *  Base for a generalized form of the 'remember' SQL function that is a pass-through for values
     *  (it returns its argument unchanged using move semantics) but also saves the
     *  value that is passed through into a bound variable.
     */
    template<typename P>
    struct note_value_fn {
        P operator()(P&& value, carray_pointer_arg<P> pv) const {
            if(P* observer = pv) {
                *observer = value;
            }
            return std::move(value);
        }
    };

    /**
     *  remember(V, $PTR) extension function https://sqlite.org/src/file/ext/misc/remember.c
     */
    struct remember_fn : note_value_fn<int64> {
        static constexpr const char* name() {
            return "remember";
        }
    };
}
#endif
#endif
#pragma once

#include <string>  //  std::string

// #include "schema/column.h"

// #include "schema/table.h"

// #include "column_pointer.h"

// #include "alias.h"

namespace sqlite_orm {
    /** 
     *  SQLite's "schema table" that stores the schema for a database.
     *  
     *  @note Despite the fact that the schema table was renamed from "sqlite_master" to "sqlite_schema" in SQLite 3.33.0
     *  the renaming process was more like keeping the previous name "sqlite_master" and attaching an internal alias "sqlite_schema".
     *  One can infer this fact from the following SQL statement:
     *  It qualifies the set of columns, but bails out with error "no such table: sqlite_schema": `SELECT sqlite_schema.* from sqlite_schema`.
     *  Hence we keep its previous table name `sqlite_master`, and provide `sqlite_schema` as a table alias in sqlite_orm.
     */
    struct sqlite_master {
        std::string type;
        std::string name;
        std::string tbl_name;
        int rootpage = 0;
        std::string sql;

#ifdef SQLITE_ORM_DEFAULT_COMPARISONS_SUPPORTED
        friend bool operator==(const sqlite_master&, const sqlite_master&) = default;
#endif
    };

    inline auto make_sqlite_schema_table() {
        return make_table("sqlite_master",
                          make_column("type", &sqlite_master::type),
                          make_column("name", &sqlite_master::name),
                          make_column("tbl_name", &sqlite_master::tbl_name),
                          make_column("rootpage", &sqlite_master::rootpage),
                          make_column("sql", &sqlite_master::sql));
    }

#ifdef SQLITE_ORM_WITH_CPP20_ALIASES
    inline constexpr orm_table_reference auto sqlite_master_table = c<sqlite_master>();
    inline constexpr orm_table_alias auto sqlite_schema = "sqlite_schema"_alias.for_<sqlite_master>();
#endif
}
#pragma once

#ifdef SQLITE_ENABLE_DBSTAT_VTAB
#include <string>  //  std::string
#endif

// #include "../schema/column.h"

// #include "../schema/table.h"

namespace sqlite_orm {
#ifdef SQLITE_ENABLE_DBSTAT_VTAB
    struct dbstat {
        std::string name;
        std::string path;
        int pageno = 0;
        std::string pagetype;
        int ncell = 0;
        int payload = 0;
        int unused = 0;
        int mx_payload = 0;
        int pgoffset = 0;
        int pgsize = 0;
    };

    inline auto make_dbstat_table() {
        return make_table("dbstat",
                          make_column("name", &dbstat::name),
                          make_column("path", &dbstat::path),
                          make_column("pageno", &dbstat::pageno),
                          make_column("pagetype", &dbstat::pagetype),
                          make_column("ncell", &dbstat::ncell),
                          make_column("payload", &dbstat::payload),
                          make_column("unused", &dbstat::unused),
                          make_column("mx_payload", &dbstat::mx_payload),
                          make_column("pgoffset", &dbstat::pgoffset),
                          make_column("pgsize", &dbstat::pgsize));
    }
#endif  //  SQLITE_ENABLE_DBSTAT_VTAB
}
/** @file Mainly existing to disentangle implementation details from circular and cross dependencies
 *  (e.g. column_t -> default_value_extractor -> serializer_context -> db_objects_tuple -> table_t -> column_t)
 *  this file is also used to provide definitions of interface methods 'hitting the database'.
 */
#pragma once

// #include "implementations/column_definitions.h"
/** @file Mainly existing to disentangle implementation details from circular and cross dependencies
 *  (e.g. column_t -> default_value_extractor -> serializer_context -> db_objects_tuple -> table_t -> column_t)
 *  this file is also used to provide definitions of interface methods 'hitting the database'.
 */

#include <memory>  //  std::make_unique

// #include "../functional/static_magic.h"

// #include "../tuple_helper/tuple_traits.h"

// #include "../default_value_extractor.h"

// #include "../schema/column.h"

namespace sqlite_orm {
    namespace internal {

        template<class... Op>
        std::unique_ptr<std::string> column_constraints<Op...>::default_value() const {
            static constexpr size_t default_op_index = find_tuple_template<constraints_type, default_t>::value;

            std::unique_ptr<std::string> value;
            call_if_constexpr<default_op_index != std::tuple_size<constraints_type>::value>(
                [&value](auto& constraints) {
                    value =
                        std::make_unique<std::string>(serialize_default_value(std::get<default_op_index>(constraints)));
                },
                this->constraints);
            return value;
        }

    }
}

// #include "implementations/table_definitions.h"
/** @file Mainly existing to disentangle implementation details from circular and cross dependencies
 *  (e.g. column_t -> default_value_extractor -> serializer_context -> db_objects_tuple -> table_t -> column_t)
 *  this file is also used to provide definitions of interface methods 'hitting the database'.
 */

#include <type_traits>  //  std::decay_t
#include <utility>  //  std::move
#include <algorithm>  //  std::find_if, std::ranges::find

// #include "../functional/cxx_universal.h"
//  ::size_t
// #include "../type_printer.h"

// #include "../schema/column.h"

// #include "../schema/table.h"

namespace sqlite_orm {
    namespace internal {

        template<class T, bool WithoutRowId, class... Cs>
        std::vector<table_xinfo> table_t<T, WithoutRowId, Cs...>::get_table_info() const {
            std::vector<table_xinfo> res;
            res.reserve(filter_tuple_sequence_t<elements_type, is_column>::size());
            this->for_each_column([&res](auto& column) {
                using field_type = field_type_t<std::decay_t<decltype(column)>>;
                std::string dft;
                if(auto d = column.default_value()) {
                    dft = std::move(*d);
                }
                res.emplace_back(-1,
                                 column.name,
                                 type_printer<field_type>().print(),
                                 column.is_not_null(),
                                 std::move(dft),
                                 column.template is<is_primary_key>(),
                                 column.template is<is_generated_always>());
            });
            auto compositeKeyColumnNames = this->composite_key_columns_names();
            for(size_t i = 0; i < compositeKeyColumnNames.size(); ++i) {
                const std::string& columnName = compositeKeyColumnNames[i];
#if __cpp_lib_ranges >= 201911L
                auto it = std::ranges::find(res, columnName, &table_xinfo::name);
#else
                auto it = std::find_if(res.begin(), res.end(), [&columnName](const table_xinfo& ti) {
                    return ti.name == columnName;
                });
#endif
                if(it != res.end()) {
                    it->pk = static_cast<int>(i + 1);
                }
            }
            return res;
        }

    }
}

// #include "implementations/storage_definitions.h"
/** @file Mainly existing to disentangle implementation details from circular and cross dependencies
 *  this file is also used to separate implementation details from the main header file,
 *  e.g. usage of the dbstat table.
 */

#include <type_traits>  //  std::is_same
#include <sstream>
#include <functional>  //  std::reference_wrapper, std::cref
#include <algorithm>  //  std::find_if, std::ranges::find

// #include "../sqlite_schema_table.h"

// #include "../eponymous_vtabs/dbstat.h"

// #include "../type_traits.h"

// #include "../util.h"

// #include "../serializing_util.h"

// #include "../storage.h"

namespace sqlite_orm {
    namespace internal {

        template<class... DBO>
        template<class Table, satisfies<is_table, Table>>
        sync_schema_result storage_t<DBO...>::sync_table(const Table& table, sqlite3* db, bool preserve) {
            if(std::is_same<object_type_t<Table>, sqlite_master>::value) {
                return sync_schema_result::already_in_sync;
            }
#ifdef SQLITE_ENABLE_DBSTAT_VTAB
            if(std::is_same<object_type_t<Table>, dbstat>::value) {
                return sync_schema_result::already_in_sync;
            }
#endif  //  SQLITE_ENABLE_DBSTAT_VTAB
            auto res = sync_schema_result::already_in_sync;
            bool attempt_to_preserve = true;

            auto schema_stat = this->schema_status(table, db, preserve, &attempt_to_preserve);
            if(schema_stat != sync_schema_result::already_in_sync) {
                if(schema_stat == sync_schema_result::new_table_created) {
                    this->create_table(db, table.name, table);
                    res = sync_schema_result::new_table_created;
                } else {
                    if(schema_stat == sync_schema_result::old_columns_removed ||
                       schema_stat == sync_schema_result::new_columns_added ||
                       schema_stat == sync_schema_result::new_columns_added_and_old_columns_removed) {

                        //  get table info provided in `make_table` call..
                        auto storageTableInfo = table.get_table_info();

                        //  now get current table info from db using `PRAGMA table_xinfo` query..
                        auto dbTableInfo = this->pragma.table_xinfo(table.name);  // should include generated columns

                        //  this vector will contain pointers to columns that gotta be added..
                        std::vector<const table_xinfo*> columnsToAdd;

                        this->calculate_remove_add_columns(columnsToAdd, storageTableInfo, dbTableInfo);

                        if(schema_stat == sync_schema_result::old_columns_removed) {
#if SQLITE_VERSION_NUMBER >= 3035000  //  DROP COLUMN feature exists (v3.35.0)
                            for(auto& tableInfo: dbTableInfo) {
                                this->drop_column(db, table.name, tableInfo.name);
                            }
                            res = sync_schema_result::old_columns_removed;
#else
                            //  extra table columns than storage columns
                            this->backup_table(db, table, {});
                            res = sync_schema_result::old_columns_removed;
#endif
                        }

                        if(schema_stat == sync_schema_result::new_columns_added) {
                            for(const table_xinfo* colInfo: columnsToAdd) {
                                table.for_each_column([this, colInfo, &tableName = table.name, db](auto& column) {
                                    if(column.name != colInfo->name) {
                                        return;
                                    }
                                    this->add_column(db, tableName, column);
                                });
                            }
                            res = sync_schema_result::new_columns_added;
                        }

                        if(schema_stat == sync_schema_result::new_columns_added_and_old_columns_removed) {

                            auto storageTableInfo = table.get_table_info();
                            this->add_generated_cols(columnsToAdd, storageTableInfo);

                            // remove extra columns and generated columns
                            this->backup_table(db, table, columnsToAdd);
                            res = sync_schema_result::new_columns_added_and_old_columns_removed;
                        }
                    } else if(schema_stat == sync_schema_result::dropped_and_recreated) {
                        //  now get current table info from db using `PRAGMA table_xinfo` query..
                        auto dbTableInfo = this->pragma.table_xinfo(table.name);  // should include generated columns
                        auto storageTableInfo = table.get_table_info();

                        //  this vector will contain pointers to columns that gotta be added..
                        std::vector<const table_xinfo*> columnsToAdd;

                        this->calculate_remove_add_columns(columnsToAdd, storageTableInfo, dbTableInfo);

                        this->add_generated_cols(columnsToAdd, storageTableInfo);

                        if(preserve && attempt_to_preserve) {
                            this->backup_table(db, table, columnsToAdd);
                        } else {
                            this->drop_create_with_loss(db, table);
                        }
                        res = schema_stat;
                    }
                }
            }
            return res;
        }

        template<class... DBO>
        template<class Table>
        void storage_t<DBO...>::copy_table(
            sqlite3* db,
            const std::string& sourceTableName,
            const std::string& destinationTableName,
            const Table& table,
            const std::vector<const table_xinfo*>& columnsToIgnore) const {  // must ignore generated columns
            std::vector<std::reference_wrapper<const std::string>> columnNames;
            columnNames.reserve(table.template count_of<is_column>());
            table.for_each_column([&columnNames, &columnsToIgnore](const column_identifier& column) {
                auto& columnName = column.name;
#if __cpp_lib_ranges >= 201911L
                auto columnToIgnoreIt = std::ranges::find(columnsToIgnore, columnName, &table_xinfo::name);
#else
                auto columnToIgnoreIt = std::find_if(columnsToIgnore.begin(),
                                                     columnsToIgnore.end(),
                                                     [&columnName](const table_xinfo* tableInfo) {
                                                         return columnName == tableInfo->name;
                                                     });
#endif
                if(columnToIgnoreIt == columnsToIgnore.end()) {
                    columnNames.push_back(cref(columnName));
                }
            });

            std::stringstream ss;
            ss << "INSERT INTO " << streaming_identifier(destinationTableName) << " ("
               << streaming_identifiers(columnNames) << ") "
               << "SELECT " << streaming_identifiers(columnNames) << " FROM " << streaming_identifier(sourceTableName)
               << std::flush;
            perform_void_exec(db, ss.str());
        }
    }
}

#pragma once

#if defined(_MSC_VER)
__pragma(pop_macro("max"))
__pragma(pop_macro("min"))
#endif  // defined(_MSC_VER)