diesel/pg/expression/

functions.rs

//! PostgreSQL specific functions

use super::expression_methods::InetOrCidr;
use crate::expression::functions::define_sql_function;
use crate::pg::expression::expression_methods::ArrayOrNullableArray;
use crate::pg::expression::expression_methods::CombinedAllNullableValue;
use crate::pg::expression::expression_methods::CombinedNullableValue;
use crate::pg::expression::expression_methods::JsonOrNullableJson;
use crate::pg::expression::expression_methods::JsonbOrNullableJsonb;
use crate::pg::expression::expression_methods::MaybeNullableValue;
use crate::pg::expression::expression_methods::MultirangeOrNullableMultirange;
use crate::pg::expression::expression_methods::MultirangeOrRangeMaybeNullable;
use crate::pg::expression::expression_methods::RangeOrNullableRange;
use crate::pg::expression::expression_methods::RecordOrNullableRecord;
use crate::pg::expression::expression_methods::TextArrayOrNullableTextArray;
use crate::sql_types::*;

define_sql_function! {
    /// Creates an abbreviated display format as text.
    #[cfg(feature = "postgres_backend")]
    fn abbrev<T: InetOrCidr + SingleValue>(addr: T) -> Text;
}
define_sql_function! {
    /// Computes the broadcast address for the address's network.
    #[cfg(feature = "postgres_backend")]
    fn broadcast<T: InetOrCidr + SingleValue>(addr: T) -> Inet;
}
define_sql_function! {
    /// Returns the address's family: 4 for IPv4, 6 for IPv6.
    #[cfg(feature = "postgres_backend")]
    fn family<T: InetOrCidr + SingleValue>(addr: T) -> Integer;
}
define_sql_function! {
    /// Returns the IP address as text, ignoring the netmask.
    #[cfg(feature = "postgres_backend")]
    fn host<T: InetOrCidr + SingleValue>(addr: T) -> Text;
}
define_sql_function! {
    /// Computes the host mask for the address's network.
    #[cfg(feature = "postgres_backend")]
    fn hostmask<T: InetOrCidr + SingleValue>(addr: T) -> Inet;
}
define_sql_function! {
    /// Computes the smallest network that includes both of the given networks.
    #[cfg(feature = "postgres_backend")]
    fn inet_merge<T: InetOrCidr + SingleValue, U: InetOrCidr + SingleValue>(a: T, b: U) -> Cidr;
}
define_sql_function! {
    /// Tests whether the addresses belong to the same IP family.
    #[cfg(feature = "postgres_backend")]
    fn inet_same_family<T: InetOrCidr + SingleValue, U: InetOrCidr + SingleValue>(a: T, b: U) -> Bool;
}
define_sql_function! {
    /// Returns the netmask length in bits.
    #[cfg(feature = "postgres_backend")]
    fn masklen<T: InetOrCidr + SingleValue>(addr: T) -> Integer;
}
define_sql_function! {
    /// Computes the network mask for the address's network.
    #[cfg(feature = "postgres_backend")]
    fn netmask<T: InetOrCidr + SingleValue>(addr: T) -> Inet;
}
define_sql_function! {
    /// Returns the network part of the address, zeroing out whatever is to the right of the
    /// netmask. (This is equivalent to casting the value to cidr.)
    #[cfg(feature = "postgres_backend")]
    fn network<T: InetOrCidr + SingleValue>(addr: T) -> Cidr;
}
define_sql_function! {
    /// Sets the netmask length for an inet or cidr value.
    /// For inet, the address part does not changes. For cidr, address bits to the right of the new
    /// netmask are set to zero.
    #[cfg(feature = "postgres_backend")]
    fn set_masklen<T: InetOrCidr + SingleValue>(addr: T, len: Integer) -> T;
}

define_sql_function! {
    /// Returns the lower bound of the range
    ///
    /// If the range is empty or has no lower bound, it returns NULL.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// # use diesel::pg::sql_types::{Range, Multirange};
    /// # use diesel::dsl::lower;
    /// #     use std::collections::Bound;
    /// #     use diesel::sql_types::{Nullable, Integer, Array};
    /// #     let connection = &mut establish_connection();
    /// let int = diesel::select(lower::<Range<_>,  _>(1..2)).get_result::<Option<i32>>(connection)?;
    /// assert_eq!(Some(1), int);
    ///
    /// let int = diesel::select(lower::<Range<_>, _>(..2)).get_result::<Option<i32>>(connection)?;
    /// assert_eq!(None, int);
    ///
    /// let int = diesel::select(lower::<Nullable<Range<_>>, _>(None::<std::ops::Range<i32>>)).get_result::<Option<i32>>(connection)?;
    /// assert_eq!(None, int);
    ///
    /// let int = diesel::select(lower::<Multirange<_>, _>(vec![5..7])).get_result::<Option<i32>>(connection)?;
    /// assert_eq!(Some(5), int);
    /// #     Ok(())
    /// # }
    /// ```
    #[cfg(feature = "postgres_backend")]
    fn lower<R: MultirangeOrRangeMaybeNullable + SingleValue>(range: R) -> Nullable<R::Inner>;
}

define_sql_function! {
    /// Returns the upper bound of the range
    ///
    /// If the range is empty or has no upper bound, it returns NULL.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// # use diesel::pg::sql_types::{Range, Multirange};
    /// # use diesel::dsl::upper;
    /// #     use std::collections::Bound;
    /// #     use diesel::sql_types::{Nullable, Integer, Array};
    /// #     let connection = &mut establish_connection();
    /// let int = diesel::select(upper::<Range<_>,  _>(1..2)).get_result::<Option<i32>>(connection)?;
    /// assert_eq!(Some(2), int);
    ///
    /// let int = diesel::select(upper::<Range<_>, _>(1..)).get_result::<Option<i32>>(connection)?;
    /// assert_eq!(None, int);
    ///
    /// let int = diesel::select(upper::<Nullable<Range<_>>, _>(None::<std::ops::Range<i32>>)).get_result::<Option<i32>>(connection)?;
    /// assert_eq!(None, int);
    ///
    /// let int = diesel::select(upper::<Multirange<_>, _>(vec![5..7])).get_result::<Option<i32>>(connection)?;
    /// assert_eq!(Some(7), int);
    /// #     Ok(())
    /// # }
    /// ```
    #[cfg(feature = "postgres_backend")]
    fn upper<R: MultirangeOrRangeMaybeNullable + SingleValue>(range: R) -> Nullable<R::Inner>;
}

define_sql_function! {
    /// Returns true if the range is empty
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// # use diesel::pg::sql_types::{Range, Multirange};
    /// # use diesel::dsl::isempty;
    /// #     use std::collections::Bound;
    /// #     use diesel::sql_types::{Nullable, Integer, Array};
    /// #     let connection = &mut establish_connection();
    /// let int = diesel::select(isempty::<Range<Integer>,  _>(1..5)).get_result::<bool>(connection)?;
    /// assert_eq!(false, int);
    ///
    /// let int = diesel::select(isempty::<Range<Integer>, _>(1..1)).get_result::<bool>(connection)?;
    /// assert_eq!(true, int);
    ///
    /// let int = diesel::select(isempty::<Nullable<Range<Integer>>, _>(None::<std::ops::Range<i32>>)).get_result::<Option<bool>>(connection)?;
    /// assert_eq!(None, int);
    ///
    /// let int = diesel::select(isempty::<Multirange<Integer>, _>(vec![5..7])).get_result::<bool>(connection)?;
    /// assert_eq!(false, int);
    /// #     Ok(())
    /// # }
    /// ```
    #[cfg(feature = "postgres_backend")]
    fn isempty<R: MultirangeOrRangeMaybeNullable + SingleValue + MaybeNullableValue<Bool>>(range: R) -> R::Out;
}

define_sql_function! {
    /// Returns true if the range's lower bound is inclusive
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// # use diesel::pg::sql_types::{Range, Multirange};
    /// # use diesel::dsl::lower_inc;
    /// #     use std::collections::Bound;
    /// #     use diesel::sql_types::{Nullable, Integer, Array};
    /// #     let connection = &mut establish_connection();
    /// let int = diesel::select(lower_inc::<Range<Integer>,  _>(1..5)).get_result::<bool>(connection)?;
    /// assert_eq!(true, int);
    ///
    /// let int = diesel::select(lower_inc::<Range<Integer>, _>(..5)).get_result::<bool>(connection)?;
    /// assert_eq!(false, int);
    ///
    /// let int = diesel::select(lower_inc::<Nullable<Range<Integer>>, _>(None::<std::ops::Range<i32>>)).get_result::<Option<bool>>(connection)?;
    /// assert_eq!(None, int);
    ///
    /// let int = diesel::select(lower_inc::<Multirange<Integer>, _>(vec![5..7])).get_result::<bool>(connection)?;
    /// assert_eq!(true, int);
    /// #     Ok(())
    /// # }
    /// ```
    #[cfg(feature = "postgres_backend")]
    fn lower_inc<R: MultirangeOrRangeMaybeNullable + SingleValue + MaybeNullableValue<Bool>>(range: R) -> R::Out;
}

define_sql_function! {
    /// Returns true if the range's upper bound is inclusive
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// # use diesel::pg::sql_types::{Range, Multirange};
    /// # use diesel::dsl::upper_inc;
    /// #     use std::collections::Bound;
    /// #     use diesel::sql_types::{Nullable, Integer, Array};
    /// #     let connection = &mut establish_connection();
    /// let int = diesel::select(upper_inc::<Range<Integer>,  _>(1..5)).get_result::<bool>(connection)?;
    /// assert_eq!(false, int);
    ///
    /// let int = diesel::select(upper_inc::<Nullable<Range<Integer>>, _>(None::<std::ops::Range<i32>>)).get_result::<Option<bool>>(connection)?;
    /// assert_eq!(None, int);
    ///
    /// let int = diesel::select(upper_inc::<Multirange<Integer>, _>(vec![5..7])).get_result::<bool>(connection)?;
    /// assert_eq!(false, int);
    /// #     Ok(())
    /// # }
    /// ```
    #[cfg(feature = "postgres_backend")]
    fn upper_inc<R: MultirangeOrRangeMaybeNullable + SingleValue + MaybeNullableValue<Bool>>(range: R) -> R::Out;
}

define_sql_function! {
    /// Returns true if the range's lower bound is unbounded
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// # use diesel::pg::sql_types::{Range, Multirange};
    /// # use diesel::dsl::lower_inf;
    /// #     use std::collections::Bound;
    /// #     use diesel::sql_types::{Nullable, Integer, Array};
    /// #     let connection = &mut establish_connection();
    /// let int = diesel::select(lower_inf::<Range<Integer>,  _>(1..5)).get_result::<bool>(connection)?;
    /// assert_eq!(false, int);
    ///
    /// let int = diesel::select(lower_inf::<Range<Integer>,  _>(..5)).get_result::<bool>(connection)?;
    /// assert_eq!(true, int);
    ///
    /// let int = diesel::select(lower_inf::<Nullable<Range<Integer>>, _>(None::<std::ops::Range<i32>>)).get_result::<Option<bool>>(connection)?;
    /// assert_eq!(None, int);
    ///
    /// let int = diesel::select(lower_inf::<Multirange<Integer>, _>(vec![5..7])).get_result::<bool>(connection)?;
    /// assert_eq!(false, int);
    /// #     Ok(())
    /// # }
    /// ```
    #[cfg(feature = "postgres_backend")]
    fn lower_inf<R: MultirangeOrRangeMaybeNullable + SingleValue + MaybeNullableValue<Bool>>(range: R) -> R::Out;
}

define_sql_function! {
    /// Returns true if the range's upper bound is unbounded
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// # use diesel::pg::sql_types::{Range, Multirange};
    /// # use diesel::dsl::upper_inf;
    /// #     use std::collections::Bound;
    /// #     use diesel::sql_types::{Nullable, Integer, Array};
    /// #     let connection = &mut establish_connection();
    /// let int = diesel::select(upper_inf::<Range<Integer>,  _>(1..5)).get_result::<bool>(connection)?;
    /// assert_eq!(false, int);
    ///
    /// let int = diesel::select(upper_inf::<Range<Integer>,  _>(1..)).get_result::<bool>(connection)?;
    /// assert_eq!(true, int);
    ///
    /// let int = diesel::select(upper_inf::<Nullable<Range<Integer>>, _>(None::<std::ops::Range<i32>>)).get_result::<Option<bool>>(connection)?;
    /// assert_eq!(None, int);
    ///
    /// let int = diesel::select(upper_inf::<Multirange<Integer>, _>(vec![5..7])).get_result::<bool>(connection)?;
    /// assert_eq!(false, int);
    /// #     Ok(())
    /// # }
    /// ```
    #[cfg(feature = "postgres_backend")]
    fn upper_inf<R: MultirangeOrRangeMaybeNullable + SingleValue + MaybeNullableValue<Bool>>(range: R) -> R::Out;
}

define_sql_function! {
    /// Returns the smallest range which includes both of the given ranges
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// # use diesel::pg::sql_types::{Range, Multirange};
    /// # use diesel::dsl::range_merge;
    /// #     use std::collections::Bound;
    /// #     use diesel::sql_types::{Nullable, Integer, Array};
    /// #     let connection = &mut establish_connection();
    /// let int = diesel::select(range_merge::<Range<Integer>, Range<_>,  _, _>(5..11, 10..)).get_result::<(Bound<i32>, Bound<i32>)>(connection)?;
    /// assert_eq!((Bound::Included(5), Bound::Unbounded), int);
    ///
    /// let int = diesel::select(range_merge::<Range<Integer>, Range<_>,  _, _>(1..3, 7..10)).get_result::<(Bound<i32>, Bound<i32>)>(connection)?;
    /// assert_eq!((Bound::Included(1), Bound::Excluded(10)), int);
    ///
    /// let int = diesel::select(range_merge::<Nullable<Range<Integer>>, Nullable<Range<_>>,  _, _>(None::<std::ops::Range<i32>>, 7..10)).get_result::<Option<(Bound<i32>, Bound<i32>)>>(connection)?;
    /// assert_eq!(None, int);
    ///
    /// let int = diesel::select(range_merge::<Nullable<Range<Integer>>, Nullable<Range<_>>,  _, _>(1..3, None::<std::ops::Range<i32>>)).get_result::<Option<(Bound<i32>, Bound<i32>)>>(connection)?;
    /// assert_eq!(None, int);
    /// #     Ok(())
    /// # }
    /// ```
    #[cfg(feature = "postgres_backend")]
    fn range_merge<R1: RangeOrNullableRange + SingleValue, R2: RangeOrNullableRange<Inner=R1::Inner> + SingleValue + CombinedNullableValue<R1, Range<R1::Inner>>>(lhs: R1, rhs: R2) -> R2::Out;
}

define_sql_function! {
    /// Returns the smallest range which includes all ranges in the multirange
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// # use diesel::pg::sql_types::{Range, Multirange};
    /// # use diesel::dsl::multirange_merge;
    /// #     use std::collections::Bound;
    /// #     use diesel::sql_types::{Nullable, Integer, Array};
    /// #     let connection = &mut establish_connection();
    /// let int = diesel::select(multirange_merge::<Multirange<Integer>, _>(vec![1..3, 7..10])).get_result::<(Bound<i32>, Bound<i32>)>(connection)?;
    /// assert_eq!((Bound::Included(1), Bound::Excluded(10)), int);
    ///
    /// let int = diesel::select(multirange_merge::<Nullable<Multirange<Integer>>, _>(None::<Vec<std::ops::Range<i32>>>)).get_result::<Option<(Bound<i32>, Bound<i32>)>>(connection)?;
    /// assert_eq!(None, int);
    /// #     Ok(())
    /// # }
    /// ```
    #[cfg(feature = "postgres_backend")]
    #[sql_name = "range_merge"]
    fn multirange_merge<R: MultirangeOrNullableMultirange + SingleValue>(multirange: R) -> R::Range;
}

define_sql_function! {
    /// Returns range of integer
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # table! {
    /// #     posts {
    /// #         id -> Integer,
    /// #         versions -> Int4range,
    /// #     }
    /// # }
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// #     use self::posts::dsl::*;
    /// #     use std::collections::Bound;
    /// #     let conn = &mut establish_connection();
    /// #     diesel::sql_query("DROP TABLE IF EXISTS posts").execute(conn).unwrap();
    /// #     diesel::sql_query("CREATE TABLE posts (id SERIAL PRIMARY KEY, versions INT4RANGE NOT NULL)").execute(conn).unwrap();
    /// #
    /// use diesel::dsl::int4range;
    /// use diesel::pg::sql_types::RangeBound;
    ///
    /// diesel::insert_into(posts)
    ///     .values(&[
    ///        versions.eq(int4range(Some(3), Some(5), RangeBound::LowerBoundInclusiveUpperBoundInclusive)),
    ///        versions.eq(int4range(None, Some(2), RangeBound::LowerBoundInclusiveUpperBoundExclusive)),
    ///     ]).execute(conn)?;
    ///
    /// let cool_posts = posts.select(versions)
    ///     .load::<(Bound<i32>, Bound<i32>)>(conn)?;
    /// assert_eq!(vec![
    ///          (Bound::Included(3), Bound::Excluded(6)), // Postgres cast this internally
    ///          (Bound::Unbounded, Bound::Excluded(2)),
    ///      ], cool_posts);
    /// #     Ok(())
    /// # }
    /// ```
    #[cfg(feature = "postgres_backend")]
    fn int4range(lower: Nullable<Integer>, upper: Nullable<Integer>, bound: RangeBoundEnum) -> Int4range;
}

define_sql_function! {
    /// Returns range of big ints
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # table! {
    /// #     posts {
    /// #         id -> Integer,
    /// #         versions -> Int8range,
    /// #     }
    /// # }
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// #     use self::posts::dsl::*;
    /// #     use std::collections::Bound;
    /// #     let conn = &mut establish_connection();
    /// #     diesel::sql_query("DROP TABLE IF EXISTS posts").execute(conn).unwrap();
    /// #     diesel::sql_query("CREATE TABLE posts (id SERIAL PRIMARY KEY, versions INT8RANGE NOT NULL)").execute(conn).unwrap();
    /// #
    /// use diesel::dsl::int8range;
    /// use diesel::pg::sql_types::RangeBound;
    ///
    /// diesel::insert_into(posts)
    ///     .values(&[
    ///        versions.eq(int8range(Some(3), Some(5), RangeBound::LowerBoundInclusiveUpperBoundInclusive)),
    ///        versions.eq(int8range(None, Some(2), RangeBound::LowerBoundInclusiveUpperBoundExclusive)),
    ///     ]).execute(conn)?;
    ///
    /// let cool_posts = posts.select(versions)
    ///     .load::<(Bound<i64>, Bound<i64>)>(conn)?;
    /// assert_eq!(vec![
    ///          (Bound::Included(3), Bound::Excluded(6)), // Postgres cast this internally
    ///          (Bound::Unbounded, Bound::Excluded(2)),
    ///      ], cool_posts);
    /// #     Ok(())
    /// # }
    /// ```
    #[cfg(feature = "postgres_backend")]
    fn int8range(lower: Nullable<BigInt>, upper: Nullable<BigInt>, bound: RangeBoundEnum) -> Int8range;
}

define_sql_function! {
    /// Returns range of numeric values
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # table! {
    /// #     posts {
    /// #         id -> Integer,
    /// #         versions -> Numrange,
    /// #     }
    /// # }
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "numeric")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "numeric")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use self::posts::dsl::*;
    /// #     use std::collections::Bound;
    /// #     let conn = &mut establish_connection();
    /// #     diesel::sql_query("DROP TABLE IF EXISTS posts").execute(conn).unwrap();
    /// #     diesel::sql_query("CREATE TABLE posts (id SERIAL PRIMARY KEY, versions NUMRANGE NOT NULL)").execute(conn).unwrap();
    /// #
    /// # use bigdecimal::BigDecimal;
    /// use diesel::dsl::numrange;
    /// use diesel::pg::sql_types::RangeBound;
    ///
    /// diesel::insert_into(posts)
    ///     .values(&[
    ///        versions.eq(numrange(Some(BigDecimal::from(3)), Some(BigDecimal::from(5)), RangeBound::LowerBoundInclusiveUpperBoundInclusive)),
    ///        versions.eq(numrange(None, Some(BigDecimal::from(2)), RangeBound::LowerBoundInclusiveUpperBoundExclusive)),
    ///     ]).execute(conn)?;
    ///
    /// let cool_posts = posts.select(versions)
    ///     .load::<(Bound<BigDecimal>, Bound<BigDecimal>)>(conn)?;
    /// assert_eq!(vec![
    ///          (Bound::Included(BigDecimal::from(3)), Bound::Included(BigDecimal::from(5))),
    ///          (Bound::Unbounded, Bound::Excluded(BigDecimal::from(2))),
    ///      ], cool_posts);
    /// #     Ok(())
    /// # }
    /// ```
    #[cfg(feature = "postgres_backend")]
    fn numrange(lower: Nullable<Numeric>, upper: Nullable<Numeric>, bound: RangeBoundEnum) -> Numrange;
}

define_sql_function! {
    /// Returns range of timestamps without timezone
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # table! {
    /// #     posts {
    /// #         id -> Integer,
    /// #         versions -> Tsrange,
    /// #     }
    /// # }
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "time")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "time")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use self::posts::dsl::*;
    /// #     use std::collections::Bound;
    /// #     let conn = &mut establish_connection();
    /// #     diesel::sql_query("DROP TABLE IF EXISTS posts").execute(conn).unwrap();
    /// #     diesel::sql_query("CREATE TABLE posts (id SERIAL PRIMARY KEY, versions TSRANGE NOT NULL)").execute(conn).unwrap();
    /// #
    /// use diesel::dsl::tsrange;
    /// use diesel::pg::sql_types::RangeBound;
    /// use time::{PrimitiveDateTime, macros::datetime};
    ///
    /// diesel::insert_into(posts)
    ///     .values(&[
    ///        versions.eq(tsrange(Some(datetime!(2020-01-01 0:00)), Some(datetime!(2021-01-01 0:00)), RangeBound::LowerBoundInclusiveUpperBoundInclusive)),
    ///        versions.eq(tsrange(None, Some(datetime!(2020-01-01 0:00)), RangeBound::LowerBoundInclusiveUpperBoundExclusive)),
    ///     ]).execute(conn)?;
    ///
    /// let cool_posts = posts.select(versions)
    ///     .load::<(Bound<PrimitiveDateTime>, Bound<PrimitiveDateTime>)>(conn)?;
    /// assert_eq!(vec![
    ///          (Bound::Included(datetime!(2020-01-01 0:00)), Bound::Included(datetime!(2021-01-01 0:00))),
    ///          (Bound::Unbounded, Bound::Excluded(datetime!(2020-01-01 0:00))),
    ///      ], cool_posts);
    /// #     Ok(())
    /// # }
    /// ```
    #[cfg(feature = "postgres_backend")]
    fn tsrange(lower: Nullable<Timestamp>, upper: Nullable<Timestamp>, bound: RangeBoundEnum) -> Tsrange;
}

define_sql_function! {
    /// Returns range of timestamps with timezone
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # table! {
    /// #     posts {
    /// #         id -> Integer,
    /// #         versions -> Tstzrange,
    /// #     }
    /// # }
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "time")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "time")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use self::posts::dsl::*;
    /// #     use std::collections::Bound;
    /// #     let conn = &mut establish_connection();
    /// #     diesel::sql_query("DROP TABLE IF EXISTS posts").execute(conn).unwrap();
    /// #     diesel::sql_query("CREATE TABLE posts (id SERIAL PRIMARY KEY, versions TSTZRANGE NOT NULL)").execute(conn).unwrap();
    /// #
    /// use diesel::dsl::tstzrange;
    /// use diesel::pg::sql_types::RangeBound;
    /// use time::{OffsetDateTime, macros::datetime};
    ///
    /// diesel::insert_into(posts)
    ///     .values(&[
    ///        versions.eq(tstzrange(Some(datetime!(2020-01-01 0:00 UTC)), Some(datetime!(2021-01-01 0:00 -3)), RangeBound::LowerBoundInclusiveUpperBoundInclusive)),
    ///        versions.eq(tstzrange(None, Some(datetime!(2020-01-01 0:00 +2)), RangeBound::LowerBoundInclusiveUpperBoundExclusive)),
    ///     ]).execute(conn)?;
    ///
    /// let cool_posts = posts.select(versions)
    ///     .load::<(Bound<OffsetDateTime>, Bound<OffsetDateTime>)>(conn)?;
    /// assert_eq!(vec![
    ///          (Bound::Included(datetime!(2020-01-01 0:00 UTC)), Bound::Included(datetime!(2021-01-01 0:00 -3))),
    ///          (Bound::Unbounded, Bound::Excluded(datetime!(2020-01-01 0:00 +2))),
    ///      ], cool_posts);
    /// #     Ok(())
    /// # }
    /// ```
    #[cfg(feature = "postgres_backend")]
    fn tstzrange(lower: Nullable<Timestamptz>, upper: Nullable<Timestamptz>, bound: RangeBoundEnum) -> Tstzrange;
}

define_sql_function! {
    /// Returns range of dates
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # table! {
    /// #     posts {
    /// #         id -> Integer,
    /// #         versions -> Daterange,
    /// #     }
    /// # }
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "time")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "time")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use self::posts::dsl::*;
    /// #     use std::collections::Bound;
    /// #     let conn = &mut establish_connection();
    /// #     diesel::sql_query("DROP TABLE IF EXISTS posts").execute(conn).unwrap();
    /// #     diesel::sql_query("CREATE TABLE posts (id SERIAL PRIMARY KEY, versions DATERANGE NOT NULL)").execute(conn).unwrap();
    /// #
    /// use diesel::dsl::daterange;
    /// use diesel::pg::sql_types::RangeBound;
    /// use time::{Date, macros::date};
    ///
    /// diesel::insert_into(posts)
    ///     .values(&[
    ///        versions.eq(daterange(Some(date!(2020-01-01)), Some(date!(2021-01-01)), RangeBound::LowerBoundInclusiveUpperBoundInclusive)),
    ///        versions.eq(daterange(None, Some(date!(2020-01-01)), RangeBound::LowerBoundInclusiveUpperBoundExclusive)),
    ///     ]).execute(conn)?;
    ///
    /// let cool_posts = posts.select(versions)
    ///     .load::<(Bound<Date>, Bound<Date>)>(conn)?;
    /// assert_eq!(vec![
    ///          (Bound::Included(date!(2020-01-01)), Bound::Excluded(date!(2021-01-02))),
    ///          (Bound::Unbounded, Bound::Excluded(date!(2020-01-01))),
    ///      ], cool_posts);
    /// #     Ok(())
    /// # }
    /// ```
    #[cfg(feature = "postgres_backend")]
    fn daterange(lower: Nullable<Date>, upper: Nullable<Date>, bound: RangeBoundEnum) -> Daterange;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Append an element to the end of an array
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::array_append;
    /// #     use diesel::sql_types::{Nullable, Integer, Array};
    /// #     let connection = &mut establish_connection();
    /// let ints = diesel::select(array_append::<Array<_>, Integer, _, _>(vec![1, 2], 3))
    ///     .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(vec![1, 2, 3], ints);
    ///
    /// let ints = diesel::select(array_append::<Array<_>, Nullable<Integer>, _, _>(vec![Some(1), Some(2)], None::<i32>))
    ///     .get_result::<Vec<Option<i32>>>(connection)?;
    /// assert_eq!(vec![Some(1), Some(2), None], ints);
    ///
    /// let ints = diesel::select(array_append::<Nullable<Array<_>>, Integer, _, _>(None::<Vec<i32>>, 3))
    ///     .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(vec![3], ints);
    ///
    /// let ints = diesel::select(array_append::<Nullable<Array<_>>, Nullable<Integer>, _, _>(None::<Vec<i32>>, None::<i32>))
    ///     .get_result::<Vec<Option<i32>>>(connection)?;
    /// assert_eq!(vec![None], ints);
    /// #     Ok(())
    /// # }
    /// ```
    fn array_append<Arr: ArrayOrNullableArray<Inner=T> + SingleValue, T: SingleValue>(a: Arr, e: T) -> Array<T>;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Replace all occurrences of an element in an array with a given element
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::array_replace;
    /// #     use diesel::sql_types::{Nullable, Integer, Array};
    /// #     let connection = &mut establish_connection();
    /// let ints = diesel::select(array_replace::<Array<_>, Integer, _, _, _>(vec![1, 2, 5, 4], 5, 3))
    ///     .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(vec![1, 2, 3, 4], ints);
    ///
    /// let ints = diesel::select(array_replace::<Array<_>, Nullable<Integer>, _, _, _>(vec![Some(1), Some(2), Some(3)], Some(3), None::<i32>))
    ///     .get_result::<Vec<Option<i32>>>(connection)?;
    /// assert_eq!(vec![Some(1), Some(2), None], ints);
    ///
    /// let ints = diesel::select(array_replace::<Nullable<Array<_>>, Integer, _, _, _>(None::<Vec<i32>>, 1, 2))
    ///     .get_result::<Option<Vec<i32>>>(connection)?;
    ///
    /// let ints = diesel::select(array_replace::<Nullable<Array<_>>, Nullable<Integer>, _, _, _>(None::<Vec<i32>>, None::<i32>, Some(1)))
    ///     .get_result::<Option<Vec<Option<i32>>>>(connection)?;
    /// assert_eq!(None, ints);
    /// #    Ok(())
    /// # }
    /// ```
    fn array_replace<Arr: ArrayOrNullableArray<Inner=T> + SingleValue, T: SingleValue>(a: Arr, e: T, r: T) -> Arr;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Returns a text representation of the array's dimensions
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main(){
    /// #    run_test().unwrap();
    /// # }
    /// # fn run_test()->QueryResult<()>{
    /// #   use diesel::dsl::array_dims;
    /// #   use diesel::sql_types::{Nullable,Array,Integer};
    /// #   let connection = &mut establish_connection();
    ///
    /// let dims = diesel::select(array_dims::<Array<Integer>,_>(vec![1,2]))
    ///     .get_result::<String>(connection)?;
    /// assert!(String::from("[1:2]").eq(&dims));
    ///
    /// let dims = diesel::select(array_dims::<Array<Nullable<Integer>>,_>(vec![None::<i32>,Some(2)]))
    ///     .get_result::<String>(connection)?;
    /// assert!(String::from("[1:2]").eq(&dims));
    ///
    /// let dims = diesel::select(array_dims::<Array<Nullable<Integer>>,_>(vec![None::<i32>]))
    ///     .get_result::<String>(connection)?;
    /// assert!(String::from("[1:1]").eq(&dims));
    /// # Ok(())
    /// # }
    ///
    fn array_dims<Arr:ArrayOrNullableArray<> + SingleValue>(arr:Arr) -> Text;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Prepends an element to the beginning of an array
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::array_prepend;
    /// #     use diesel::sql_types::{Nullable, Integer, Array};
    /// #     let connection = &mut establish_connection();
    /// let ints = diesel::select(array_prepend::<Integer, Array<_>, _, _>(3, vec![1, 2]))
    ///     .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(vec![3, 1, 2], ints);
    ///
    /// let ints = diesel::select(array_prepend::<Nullable<Integer>, Array<_>, _, _>(None::<i32>, vec![Some(1), Some(2)]))
    ///     .get_result::<Vec<Option<i32>>>(connection)?;
    /// assert_eq!(vec![None, Some(1), Some(2)], ints);
    ///
    /// let ints = diesel::select(array_prepend::<Integer, Nullable<Array<_>>, _, _>(3, None::<Vec<i32>>))
    ///     .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(vec![3], ints);
    ///
    /// let ints = diesel::select(array_prepend::<Nullable<Integer>, Nullable<Array<_>>, _, _>(None::<i32>, None::<Vec<i32>>))
    ///     .get_result::<Vec<Option<i32>>>(connection)?;
    /// assert_eq!(vec![None], ints);
    /// #     Ok(())
    /// # }
    /// ```
    fn array_prepend<T: SingleValue, Arr: ArrayOrNullableArray<Inner=T> + SingleValue>(e: T, a: Arr) -> Array<T>;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Removes all elements equal to the given value from the array
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::array_remove;
    /// #     use diesel::sql_types::{Nullable, Integer, Array};
    /// #     let connection = &mut establish_connection();
    /// let ints = diesel::select(array_remove::<Array<_>, Integer, _, _>(vec![1, 2, 3, 2], 2))
    ///     .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(vec![1, 3], ints);
    ///
    /// let ints = diesel::select(array_remove::<Array<_>, Nullable<Integer>, _, _>(vec![None, Some(1), Some(2), None, Some(4)], None::<i32>))
    ///     .get_result::<Vec<Option<i32>>>(connection)?;
    /// assert_eq!(vec![Some(1), Some(2), Some(4)], ints);
    ///
    /// let ints = diesel::select(array_remove::<Nullable<Array<_>>, Nullable<Integer>, _, _>(None::<Vec<i32>>, None::<i32>))
    ///     .get_result::<Option<Vec<Option<i32>>>>(connection)?;
    /// assert_eq!(None, ints);
    /// #     Ok(())
    /// # }
    /// ```
    fn array_remove<Arr: ArrayOrNullableArray<Inner=T> + SingleValue, T: SingleValue>(a: Arr, e: T) -> Arr;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Converts each array element to its text representation and concatenates those elements
    /// separated by the delimiter string. If `null_string` is provided and is not `NULL`, then `NULL`
    /// array entries are represented by that string; otherwise, they are omitted.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::array_to_string_with_null_string;
    /// #     use diesel::sql_types::{Nullable, Text, Array};
    /// #     let connection = &mut establish_connection();
    ///
    /// // Example with `NULL` representation as a string
    /// let result: String = diesel::select(array_to_string_with_null_string::<Array<Nullable<Text>>, _, _, _>(
    ///     vec![Some("first"), None::<&str>, Some("third")], ",", "NULL"))
    ///     .get_result(connection)?;
    /// assert_eq!(result, "first,NULL,third");
    ///
    /// // Example without any `NULL` values
    /// let result: String = diesel::select(array_to_string_with_null_string::<Array<Nullable<Text>>, _, _, _>(
    ///     vec![Some("first"), Some("second")], ",", "NULL"))
    ///     .get_result(connection)?;
    /// assert_eq!(result, "first,second");
    ///
    /// // Example with all `NULL` values
    /// let result: String = diesel::select(array_to_string_with_null_string::<Array<Nullable<Text>>, _, _, _>(
    ///     vec![None::<&str>, None::<&str>], ",", "NULL"))
    ///     .get_result(connection)?;
    /// assert_eq!(result, "NULL,NULL");
    ///
    /// #     Ok(())
    /// # }
    /// ```
    #[sql_name = "array_to_string"]
    fn array_to_string_with_null_string<Arr: ArrayOrNullableArray + SingleValue>(
        array: Arr, del: Text, null: Text
    ) -> Text;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Converts each array element to its text representation and concatenates those elements
    /// separated by the delimiter string. `NULL` entries are omitted in this variant.
    /// See [array_to_string_with_null_string] for a variant with that argument.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::array_to_string;
    /// #     use diesel::sql_types::{Text, Array, Nullable};
    /// #     let connection = &mut establish_connection();
    ///
    /// // Example with non-null values
    /// let result: String = diesel::select(array_to_string::<Array<Nullable<Text>>, _, _>(
    ///     vec![Some("first"), Some("second")], ","))
    ///     .get_result(connection)?;
    /// assert_eq!(result, "first,second");
    ///
    /// // Example with `NULL` values (omitted in the result)
    /// let result: String = diesel::select(array_to_string::<Array<Nullable<Text>>, _, _>(
    ///     vec![Some("first"), None::<&str>, Some("third")], ","))
    ///     .get_result(connection)?;
    /// assert_eq!(result, "first,third");
    ///
    /// // Example with only `NULL` values (empty result)
    /// let result: String = diesel::select(array_to_string::<Array<Nullable<Text>>, _, _>(
    ///     vec![None::<&str>, None::<&str>], ","))
    ///     .get_result(connection)?;
    /// assert_eq!(result, "");
    ///
    /// #     Ok(())
    /// # }
    /// ```
    fn array_to_string<Arr: ArrayOrNullableArray + SingleValue>(
        array: Arr, del: Text
    ) -> Text;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Returns the total number of elements in the array, or 0 if the array is empty.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main(){
    /// #    run_test().unwrap();
    /// # }
    /// # fn run_test()->QueryResult<()>{
    /// #   use diesel::dsl::cardinality;
    /// #   use diesel::sql_types::{Nullable,Array,Integer};
    /// #   let connection = &mut establish_connection();
    ///
    /// let array_cardinality = diesel::select(cardinality::<Array<Integer>, _>(vec![1, 2, 3, 4]))
    ///     .get_result::<i32>(connection)?;
    /// assert_eq!(4, array_cardinality);
    ///
    /// let array_cardinality = diesel::select(cardinality::<Array<Nullable<Integer>>, _>(vec![Some(1), Some(2), Some(3)]))
    ///     .get_result::<i32>(connection)?;
    /// assert_eq!(3, array_cardinality);
    ///
    /// let array_cardinality = diesel::select(cardinality::<Array<Integer>, _>(Vec::<i32>::new()))
    ///     .get_result::<i32>(connection)?;
    /// assert_eq!(0, array_cardinality);
    ///
    /// let array_cardinality = diesel::select(cardinality::<Nullable<Array<Integer>>, _>(None::<Vec<i32>>))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(None, array_cardinality);
    /// # Ok(())
    /// # }
    ///
    fn cardinality<Arr:ArrayOrNullableArray + SingleValue + MaybeNullableValue<Integer>>(a: Arr) -> Arr::Out;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Trims an array by removing the last n elements. If the array is multidimensional, only the first dimension is trimmed.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main(){
    /// #    run_test().unwrap();
    /// # }
    /// # fn run_test()->QueryResult<()>{
    /// #   use diesel::dsl::trim_array;
    /// #   use diesel::sql_types::{Nullable,Array,Integer};
    /// #   let connection = &mut establish_connection();
    ///
    /// let trimmed_array = diesel::select(trim_array::<Array<Integer>, _, _>(vec![1, 2, 3, 4], 3))
    ///     .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(vec![1], trimmed_array);
    ///
    /// let trimmed_array = diesel::select(trim_array::<Array<Nullable<Integer>>, _, _>(vec![Some(1), Some(2), Some(3)], 1))
    ///     .get_result::<Vec<Option<i32>>>(connection)?;
    /// assert_eq!(vec![Some(1), Some(2)], trimmed_array);
    ///
    /// let trimmed_array = diesel::select(trim_array::<Array<Integer>, _, _>(Vec::<i32>::new(), 0))
    ///     .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(Vec::<i32>::new(), trimmed_array);
    ///
    /// let trimmed_array = diesel::select(trim_array::<Nullable<Array<Integer>>, _, _>(None::<Vec<i32>>, 0))
    ///     .get_result::<Option<Vec<i32>>>(connection)?;
    /// assert_eq!(None, trimmed_array);
    ///
    /// let trimmed_array = diesel::select(trim_array::<Nullable<Array<Integer>>, _, _>(None::<Vec<i32>>, 1))
    ///     .get_result::<Option<Vec<i32>>>(connection)?;
    /// assert_eq!(None, trimmed_array);
    /// # Ok(())
    /// # }
    ///
    fn trim_array<Arr:ArrayOrNullableArray + SingleValue>(a: Arr, n: Integer) -> Arr;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Concatenates two arrays
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::array_cat;
    /// #     use diesel::sql_types::{Integer, Array, Nullable};
    /// #     let connection = &mut establish_connection();
    /// let result = diesel::select(array_cat::<Array<Integer>, _, _>(vec![1, 2], vec![3, 4]))
    ///     .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(vec![1, 2, 3, 4], result);
    ///
    /// let nullable_result = diesel::select(array_cat::<Nullable<Array<Integer>>, _, _>(
    ///     None::<Vec<i32>>,
    ///     None::<Vec<i32>>
    /// )).get_result::<Option<Vec<i32>>>(connection)?;
    /// assert_eq!(None, nullable_result);
    /// #     Ok(())
    /// # }
    /// ```
    fn array_cat<Arr: ArrayOrNullableArray + SingleValue>(a: Arr, b: Arr) -> Arr;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Returns the length of the requested array
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::array_length;
    /// #     use diesel::sql_types::{Integer, Array, Nullable};
    /// #     let connection = &mut establish_connection();
    /// let result = diesel::select(array_length::<Array<Integer>, _, _>(vec![1, 2, 3], 1))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(Some(3), result);
    ///
    /// let result = diesel::select(array_length::<Array<Integer>, _, _>(vec![1, 2, 3], 2))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(None, result);
    ///
    /// let result = diesel::select(array_length::<Nullable<Array<Integer>>, _, _>(None::<Vec<i32>>, 1))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(None, result);
    /// #     Ok(())
    /// # }
    /// ```
    fn array_length<Arr: ArrayOrNullableArray + SingleValue>(array: Arr, dimension: Integer) -> Nullable<Integer>;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Returns an array initialized with supplied value and dimensions,
    /// optionally with lower bounds other than 1. This function omits the optional
    /// lower bound argument. See [array_fill_with_lower_bound] for that.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main(){
    /// #    run_test().unwrap();
    /// # }
    /// # fn run_test()->QueryResult<()>{
    /// #   use diesel::dsl::array_fill;
    /// #   use diesel::sql_types::{Nullable,Array,Integer,Text};
    /// #   let connection = &mut establish_connection();
    ///
    /// let array = diesel::select(array_fill::<Integer,_,_>(2,vec![2]))
    /// .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(vec![2,2],array);
    ///
    /// let array = diesel::select(array_fill::<Text,_,_>(String::from("abc"),vec![3]))
    /// .get_result::<Vec<String>>(connection)?;
    /// assert_eq!(vec!["abc","abc","abc"],array);
    ///
    /// let array = diesel::select(array_fill::<Nullable<Integer>,_,_>(Some(4),vec![3]))
    /// .get_result::<Vec<Option<i32>>>(connection)?;
    /// assert_eq!(vec![Some(4),Some(4),Some(4)],array);
    ///
    /// let array = diesel::select(array_fill::<Nullable<Integer>,_,_>(None::<i32>,vec![3]))
    /// .get_result::<Vec<Option<i32>>>(connection)?;
    /// assert_eq!(vec![None::<i32>,None::<i32>,None::<i32>],array);
    /// # Ok(())
    /// # }
    ///
    fn array_fill<E:SingleValue>(value: E, dim: Array<Integer>) -> Array<E>;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Returns an array initialized with supplied value and dimensions,
    /// with lower bounds other than 1
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main(){
    /// #    run_test().unwrap();
    /// # }
    /// # fn run_test()->QueryResult<()>{
    /// #   use diesel::dsl::array_fill_with_lower_bound;
    /// #   use diesel::sql_types::{Nullable,Array,Integer,Text};
    /// #   let connection = &mut establish_connection();
    ///
    /// let array = diesel::select(array_fill_with_lower_bound::<Integer,_,_,_>(2,vec![2],vec![2]))
    /// .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(vec![2,2],array);
    ///
    /// let array = diesel::select(array_fill_with_lower_bound::<Text,_,_,_>(String::from("abc"),vec![3],vec![3]))
    /// .get_result::<Vec<String>>(connection)?;
    /// assert_eq!(vec!["abc","abc","abc"],array);
    ///
    /// let array = diesel::select(array_fill_with_lower_bound::<Nullable<Integer>,_,_,_>(Some(4),vec![3],vec![3]))
    /// .get_result::<Vec<Option<i32>>>(connection)?;
    /// assert_eq!(vec![Some(4),Some(4),Some(4)],array);
    ///
    /// let array = diesel::select(array_fill_with_lower_bound::<Nullable<Integer>,_,_,_>(None::<i32>,vec![3],vec![3]))
    /// .get_result::<Vec<Option<i32>>>(connection)?;
    /// assert_eq!(vec![None::<i32>,None::<i32>,None::<i32>],array);
    /// # Ok(())
    /// # }
    ///
    #[sql_name = "array_fill"]
    fn array_fill_with_lower_bound<E:SingleValue>(value: E, dim: Array<Integer>, lower_bound: Array<Integer>) -> Array<E>;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Returns the lower bound of the requested array
    ///
    /// This function returns null for dimensions that do not exist
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::array_lower;
    /// #     use diesel::sql_types::{Integer, Array};
    /// #     let connection = &mut establish_connection();
    /// let result = diesel::select(array_lower::<Array<Integer>, _, _>(vec![1, 2, 3], 1))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(Some(1), result);
    ///
    /// // the array has only one dimension
    /// let result = diesel::select(array_lower::<Array<Integer>, _, _>(vec![1, 2, 3], 2))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(None, result);
    /// #     Ok(())
    /// # }
    /// ```
    fn array_lower<Arr: ArrayOrNullableArray + SingleValue>(array: Arr, dimension: Integer) -> Nullable<Integer>;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Returns the subscript of the first occurrence of the second argument in the array, or NULL if it's not present.
    /// If the third argument is given, the search begins at that subscript. This function omits the third argument.
    /// See [array_position_with_subscript].
    ///
    /// The array must be one-dimensional. Comparisons are done using IS NOT DISTINCT FROM semantics,
    /// so it is possible to search for NULL.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main(){
    /// #    run_test().unwrap();
    /// # }
    /// # fn run_test()->QueryResult<()>{
    /// #   use diesel::dsl::array_position;
    /// #   use diesel::sql_types::{Nullable,Array,Integer};
    /// #   let connection = &mut establish_connection();
    ///
    /// let pos = diesel::select(array_position::<Array<_>, Integer, _, _>(vec![1, 2, 3, 4], 3))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(Some(3), pos);
    ///
    /// let pos = diesel::select(array_position::<Array<_>, Integer, _, _>(vec![1, 2, 3, 4], 5))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(None::<i32>, pos);
    ///
    /// let pos = diesel::select(array_position::<Array<_>, Nullable<Integer>, _, _>(
    ///     vec![1, 2, 3, 4], None::<i32>))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(None::<i32>, pos);
    ///
    /// let pos = diesel::select(array_position::<Array<_>, Nullable<Integer>, _, _>(
    ///     vec![None::<i32>, Some(1), Some(2), Some(3)], None::<i32>))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(Some(1), pos);
    ///
    /// let dims = diesel::select(array_position::<Nullable<Array<Integer>>, Integer, _, _>(None::<Vec<i32>>, 1))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(None, dims);
    ///
    /// # Ok(())
    /// # }
    ///
    fn array_position<Arr: ArrayOrNullableArray<Inner = E> + SingleValue, E: SingleValue>(
        a: Arr,
        elem: E,
    ) -> Nullable<Integer>;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Returns the subscript of the first occurrence of the second argument in the array,
    /// or NULL if it's not present, beginning at the subscript given as the third argument.
    ///
    /// The array must be one-dimensional.
    /// Comparisons are done using IS NOT DISTINCT FROM semantics,
    /// so it is possible to search for NULL.
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main(){
    /// #    run_test().unwrap();
    /// # }
    /// # fn run_test()->QueryResult<()>{
    /// #   use diesel::dsl::array_position_with_subscript;
    /// #   use diesel::sql_types::{Nullable,Array,Integer};
    /// #   let connection = &mut establish_connection();
    ///
    /// let pos = diesel::select(array_position_with_subscript::<Array<_>, Integer, _, _, _>(
    ///     vec![1, 2, 3, 4], 3, 2))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(Some(3), pos);
    ///
    /// let pos = diesel::select(array_position_with_subscript::<Array<_>, Integer, _, _, _>(
    ///     vec![1, 2, 3, 4], 1, 2))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(None::<i32>, pos);
    ///
    /// let pos = diesel::select(array_position_with_subscript::<Array<_>, Nullable<Integer>, _, _, _>(
    ///     vec![None::<i32>, Some(1), Some(2), Some(3)], None::<i32>, 1))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(Some(1), pos);
    ///
    /// let pos = diesel::select(array_position_with_subscript::<Array<_>, Nullable<Integer>, _, _, _>(
    ///     vec![None::<i32>, Some(1), Some(2), Some(3)], None::<i32>, 2))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(None::<i32>, pos);
    /// # Ok(())
    /// # }
    ///
    #[sql_name = "array_position"]
    fn array_position_with_subscript<
        Arr: ArrayOrNullableArray<Inner = E> + SingleValue,
        E: SingleValue,
    >(
        a: Arr,
        elem: E,
        subscript: Integer,
    ) -> Nullable<Integer>;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Returns an array of the subscripts of all occurrences of the second argument in the
    /// array given as first argument.
    ///
    /// The array must be one-dimensional. Comparisons are done using IS NOT DISTINCT FROM semantics,
    /// so it is possible to search for NULL.
    /// NULL is returned only if the array is NULL; if the value is not found in the array, an empty array is returned.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main(){
    /// #    run_test().unwrap();
    /// # }
    /// # fn run_test()->QueryResult<()>{
    /// #   use diesel::dsl::array_positions;
    /// #   use diesel::sql_types::{Nullable,Array,Integer};
    /// #   let connection = &mut establish_connection();
    ///
    /// let pos = diesel::select(array_positions::<Array<_>, Integer, _, _>(vec![1, 1, 2, 1], 1))
    ///     .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(vec![1,2,4], pos);
    ///
    /// let pos = diesel::select(array_positions::<Array<_>, Integer, _, _>(vec![1, 2, 3, 4], 5))
    ///     .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(Vec::<i32>::new(), pos);
    ///
    /// let pos = diesel::select(array_positions::<Array<_>, Nullable<Integer>, _, _>(
    ///     vec![None::<i32>, Some(2), Some(3), None::<i32>], None::<i32>))
    ///     .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(vec![1,4], pos);
    ///
    /// let pos = diesel::select(array_positions::<Nullable<Array<_>>, Integer, _, _>(
    ///     None::<Vec<i32>>, 1))
    ///     .get_result::<Option<Vec<i32>>>(connection)?;
    /// assert_eq!(None::<Vec<i32>>, pos);
    /// # Ok(())
    /// # }
    ///
    fn array_positions<Arr: ArrayOrNullableArray<Inner = E> + SingleValue + MaybeNullableValue<Array<Integer>>, E: SingleValue>(
        a: Arr,
        elem: E,
    ) -> Arr::Out;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Returns the number of dimensions of the array
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::array_ndims;
    /// #     use diesel::sql_types::{Nullable, Array, Integer};
    /// #     let connection = &mut establish_connection();
    ///
    ///  // diesel currently only supports 1D arrays
    /// let dims = diesel::select(array_ndims::<Array<Integer>, _>(vec![1, 2]))
    ///     .get_result::<i32>(connection)?;
    /// assert_eq!(1, dims);
    ///
    /// let dims = diesel::select(array_ndims::<Nullable<Array<Integer>>, _>(None::<Vec<i32>>))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(None, dims);
    ///
    /// #     Ok(())
    /// # }
    /// ```
    fn array_ndims<Arr: ArrayOrNullableArray + SingleValue + MaybeNullableValue<Integer>>(arr: Arr) -> Arr::Out;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Returns the upper bound of the requested array
    ///
    /// This function returns null for dimensions that do not exist
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::array_upper;
    /// #     use diesel::sql_types::{Integer, Array};
    /// #     let connection = &mut establish_connection();
    /// let result = diesel::select(array_upper::<Array<Integer>, _, _>(vec![1, 2, 3], 1))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(Some(3), result);
    ///
    /// // the array has only one dimension
    /// let result = diesel::select(array_upper::<Array<Integer>, _, _>(vec![1, 2, 3], 2))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert_eq!(None, result);
    /// #     Ok(())
    /// # }
    /// ```
    fn array_upper<Arr: ArrayOrNullableArray + SingleValue>(array: Arr, dimension: Integer) -> Nullable<Integer>;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Randomly shuffles the first dimension of the array.
    ///
    /// # Example
    ///
    // This function requires postgres >= 16.0
    // which we cannot expect to be widely used at the
    // point of writing this comment, so we skip running this test
    /// ```rust,no_run
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::array_shuffle;
    /// #     use diesel::sql_types::{Array, Integer};
    /// #     let connection = &mut establish_connection();
    /// let shuffled = diesel::select(array_shuffle::<Array<Integer>, _>(vec![1, 2, 3, 4, 5]))
    ///     .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(5, shuffled.len());
    /// assert_eq!(shuffled.iter().sum::<i32>(), 15);
    /// #     Ok(())
    /// # }
    /// ```
    fn array_shuffle<Arr: ArrayOrNullableArray + SingleValue>(array: Arr) -> Arr;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Returns an array of n items randomly selected from array.
    /// n may not exceed the length of the array.
    ///
    /// # Example
    ///
    // This function requires postgres >= 16.0
    // which we cannot expect to be widely used at the
    // point of writing this comment, so we skip running this test
    /// ```rust,no_run
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::array_sample;
    /// #     use diesel::sql_types::{Array, Integer, Nullable};
    /// #     let connection = &mut establish_connection();
    ///
    /// let vec = vec![1,2,3,4,5];
    /// let sampled = diesel::select(array_sample::<Array<Integer>, _, _>(vec.clone(),3))
    ///     .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(3, sampled.len());
    /// assert!(sampled.iter().all(|x| vec.contains(x)));
    ///
    /// let vec: Vec<i32> = Vec::new();
    /// let sampled = diesel::select(array_sample::<Array<Integer>, _, _>(vec,0))
    ///     .get_result::<Vec<i32>>(connection)?;
    /// assert_eq!(0, sampled.len());
    ///
    /// let sampled = diesel::select(array_sample::<Nullable<Array<Integer>>, _, _>(None::<Vec<i32>>,1))
    ///     .get_result::<Option<Vec<i32>>>(connection)?;
    /// assert!(sampled.is_none());
    /// #     Ok(())
    /// # }
    /// ```
    fn array_sample<Arr: ArrayOrNullableArray + SingleValue>(array: Arr, n: Integer) -> Arr;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Converts any Array to json.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::array_to_json;
    /// #     use diesel::sql_types::{Array, Integer, Text, Nullable};
    /// #     use serde_json::Value;
    /// #     let connection = &mut establish_connection();
    /// let json = diesel::select(array_to_json::<Array<Integer>, _>(vec![1, 2, 3, 4, 5]))
    ///                 .get_result::<Value>(connection)?;
    /// let expected:Value = serde_json::json!([1, 2, 3, 4, 5]);
    /// assert_eq!(expected,json);
    /// let json = diesel::select(array_to_json::<Array<Text>,_>(vec!["hello","world","John","Doe"]))
    ///                 .get_result::<Value>(connection)?;
    /// let expected:Value = serde_json::json!(["hello","world","John","Doe"]);
    /// assert_eq!(expected,json);
    /// let empty:Vec<String> = Vec::new();
    /// let json = diesel::select(array_to_json::<Array<Nullable<Text>>,_>(empty))
    ///                 .get_result::<Value>(connection)?;
    /// assert_eq!(serde_json::json!([]),json);
    /// let json = diesel::select(array_to_json::<Nullable<Array<Integer>>, _>(None::<Vec<i32>>))
    ///     .get_result::<Option<Value>>(connection)?;
    /// assert_eq!(None, json);
    /// #     Ok(())
    /// # }
    /// ```
    fn array_to_json<Arr: ArrayOrNullableArray + MaybeNullableValue<Json>>(
        array: Arr,
    ) -> Arr::Out;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Converts any SQL value to json
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::to_json;
    /// #     use serde_json::{json, Value};
    /// #     use diesel::sql_types::{Integer, Array, Json, Text, Nullable};
    /// #     let connection = &mut establish_connection();
    /// let result = diesel::select(to_json::<Integer, _>(1))
    ///     .get_result::<Value>(connection)?;
    ///
    /// assert_eq!(json!(1), result);
    ///
    /// let result = diesel::select(to_json::<Array<Text>, _>(vec!["abc", "xyz"]))
    ///     .get_result::<Value>(connection)?;
    ///
    /// assert_eq!(json!(["abc", "xyz"]), result);
    ///
    /// let result = diesel::select(to_json::<Array<Nullable<Text>>, _>(Vec::<String>::new()))
    ///     .get_result::<Value>(connection)?;
    ///
    /// assert_eq!(json!([]), result);
    ///
    /// let result = diesel::select(to_json::<Nullable<Text>, _>(None::<String>))
    ///     .get_result::<Option<Value>>(connection)?;
    ///
    /// assert!(result.is_none());
    ///
    /// #     Ok(())
    /// # }
    /// ```
    fn to_json<E: MaybeNullableValue<Json>>(e: E) -> E::Out;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Converts any SQL value to jsonb
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::to_jsonb;
    /// #     use serde_json::{json, Value};
    /// #     use diesel::sql_types::{Integer, Array, Jsonb, Text, Nullable};
    /// #     let connection = &mut establish_connection();
    /// let result = diesel::select(to_jsonb::<Integer, _>(1))
    ///     .get_result::<Value>(connection)?;
    ///
    /// assert_eq!(json!(1), result);
    ///
    /// let result = diesel::select(to_jsonb::<Array<Text>, _>(vec!["abc", "def"]))
    ///     .get_result::<Value>(connection)?;
    ///
    /// assert_eq!(json!(["abc", "def"]), result);
    ///
    /// let result = diesel::select(to_jsonb::<Array<Nullable<Text>>, _>(Vec::<String>::new()))
    ///     .get_result::<Value>(connection)?;
    ///
    /// assert_eq!(json!([]), result);
    ///
    /// let result = diesel::select(to_jsonb::<Nullable<Text>, _>(None::<String>))
    ///     .get_result::<Option<Value>>(connection)?;
    ///
    /// assert!(result.is_none());
    ///
    /// #     Ok(())
    /// # }
    /// ```
    fn to_jsonb<E: MaybeNullableValue<Jsonb>>(e: E) -> E::Out;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Builds a JSON object out of a text array. The array must have an even number of members,
    /// in which case they are taken as alternating key/value pairs
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::json_object;
    /// #     use diesel::sql_types::{Array, Json, Nullable, Text};
    /// #     use serde_json::Value;
    /// #     let connection = &mut establish_connection();
    /// let json = diesel::select(json_object::<Array<Text>,_>(vec!["hello","world"]))
    ///                 .get_result::<Value>(connection)?;
    /// let expected:Value = serde_json::json!({"hello":"world"});
    /// assert_eq!(expected,json);
    ///
    /// let json = diesel::select(json_object::<Array<Text>,_>(vec!["hello","world","John","Doe"]))
    ///                 .get_result::<Value>(connection)?;
    /// let expected:Value = serde_json::json!({"hello":"world","John":"Doe"});
    /// assert_eq!(expected,json);
    ///
    /// let json = diesel::select(json_object::<Array<Text>,_>(vec!["hello","world","John"]))
    ///                 .get_result::<Value>(connection);
    /// assert!(json.is_err());
    ///
    /// let empty:Vec<String> = Vec::new();
    /// let json = diesel::select(json_object::<Array<Nullable<Text>>,_>(empty))
    ///                 .get_result::<Value>(connection);
    /// assert!(json.is_err());
    ///
    /// #     Ok(())
    /// # }
    /// ```
    fn json_object<Arr: TextArrayOrNullableTextArray + MaybeNullableValue<Json>>(
        text_array: Arr,
    ) -> Arr::Out;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// This form of json_object takes keys and values pairwise from two separate arrays.
    /// In all other respects it is identical to the one-argument form.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::json_object_with_keys_and_values;
    /// #     use diesel::sql_types::{Array, Json, Nullable, Text};
    /// #     use serde_json::Value;
    /// #     let connection = &mut establish_connection();
    /// let json = diesel::select(json_object_with_keys_and_values::<Array<Text>, Array<Text>, _, _>(
    ///             vec!["hello","John"],vec!["world","Doe"]))
    ///             .get_result::<Value>(connection)?;
    /// let expected:Value = serde_json::json!({"hello":"world","John":"Doe"});
    /// assert_eq!(expected,json);
    ///
    /// let json = diesel::select(json_object_with_keys_and_values::<Nullable<Array<Text>>, Nullable<Array<Text>>, _, _>(
    ///             Some(vec!["hello","John"]), None::<Vec<String>>))
    ///             .get_result::<Option<Value>>(connection)?;
    /// assert_eq!(None::<Value>,json);
    ///
    /// let empty: Vec<String> = Vec::new();
    /// let json = diesel::select(json_object_with_keys_and_values::<Array<Text>, Array<Text>, _, _>(
    ///             vec!["hello","John"], empty))
    ///             .get_result::<Value>(connection);
    /// assert!(json.is_err());
    ///
    /// #     Ok(())
    /// # }
    /// ```
    #[sql_name = "json_object"]
    fn json_object_with_keys_and_values<
        Arr1: TextArrayOrNullableTextArray + SingleValue,
        Arr2: TextArrayOrNullableTextArray + CombinedNullableValue<Arr1, Json>,
    >(
        keys: Arr1,
        values: Arr2,
    ) -> Arr2::Out;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Returns the type of the top-level json value as a text-string
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::json_typeof;
    /// #     use serde_json::{json, Value};
    /// #     use diesel::sql_types::{Json, Nullable};
    /// #     let connection = &mut establish_connection();
    /// let result = diesel::select(json_typeof::<Json, _>(json!({"a": "b", "c": 1})))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!("object".to_string(), result);
    ///
    /// let result = diesel::select(json_typeof::<Json, _>(json!([1,2,3])))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!("array".to_string(), result);
    ///
    /// let result = diesel::select(json_typeof::<Json, _>(json!("abc")))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!("string".to_string(), result);
    ///
    /// let result = diesel::select(json_typeof::<Json, _>(json!(-123.4)))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!("number".to_string(), result);
    ///
    /// let result = diesel::select(json_typeof::<Json, _>(json!(true)))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!("boolean".to_string(), result);
    ///
    /// let result = diesel::select(json_typeof::<Json, _>(json!(null)))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!("null".to_string(), result);
    ///
    /// let result = diesel::select(json_typeof::<Nullable<Json>, _>(None::<Value>))
    ///     .get_result::<Option<String>>(connection)?;
    ///
    /// assert!(result.is_none());
    /// #     Ok(())
    /// # }
    /// ```
    fn json_typeof<E: JsonOrNullableJson + SingleValue + MaybeNullableValue<Text>>(e: E) -> E::Out;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Returns the type of the top-level jsonb value as a text-string
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::jsonb_typeof;
    /// #     use serde_json::{json, Value};
    /// #     use diesel::sql_types::{Jsonb, Nullable};
    /// #     let connection = &mut establish_connection();
    /// let result = diesel::select(jsonb_typeof::<Jsonb, _>(json!({"a": "b", "c": 1})))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!("object".to_string(), result);
    ///
    /// let result = diesel::select(jsonb_typeof::<Jsonb, _>(json!([1,2,3])))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!("array".to_string(), result);
    ///
    /// let result = diesel::select(jsonb_typeof::<Jsonb, _>(json!("abc")))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!("string".to_string(), result);
    ///
    /// let result = diesel::select(jsonb_typeof::<Jsonb, _>(json!(-123.4)))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!("number".to_string(), result);
    ///
    /// let result = diesel::select(jsonb_typeof::<Jsonb, _>(json!(true)))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!("boolean".to_string(), result);
    ///
    /// let result = diesel::select(jsonb_typeof::<Jsonb, _>(json!(null)))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!("null".to_string(), result);
    ///
    /// let result = diesel::select(jsonb_typeof::<Nullable<Jsonb>, _>(None::<Value>))
    ///     .get_result::<Option<String>>(connection)?;
    ///
    /// assert!(result.is_none());
    /// #     Ok(())
    /// # }
    /// ```
    fn jsonb_typeof<E: JsonbOrNullableJsonb + SingleValue + MaybeNullableValue<Text>>(e: E) -> E::Out;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Converts the given json value to pretty-printed, indented text
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::jsonb_pretty;
    /// #     use serde_json::{json, Value};
    /// #     use diesel::sql_types::{Jsonb, Nullable};
    /// #     let connection = &mut establish_connection();
    /// let result = diesel::select(jsonb_pretty::<Jsonb, _>(json!([{"f1":1,"f2":null},2,null,3])))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!(r#"[
    ///     {
    ///         "f1": 1,
    ///         "f2": null
    ///     },
    ///     2,
    ///     null,
    ///     3
    /// ]"#, result);
    ///
    /// let result = diesel::select(jsonb_pretty::<Jsonb, _>(json!({"a": 1, "b": "cd"})))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!(r#"{
    ///     "a": 1,
    ///     "b": "cd"
    /// }"#, result);
    ///
    /// let result = diesel::select(jsonb_pretty::<Jsonb, _>(json!("abc")))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!(r#""abc""#, result);
    ///
    /// let result = diesel::select(jsonb_pretty::<Jsonb, _>(json!(22)))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!(r#"22"#, result);
    ///
    /// let result = diesel::select(jsonb_pretty::<Jsonb, _>(json!(false)))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!(r#"false"#, result);
    ///
    /// let result = diesel::select(jsonb_pretty::<Jsonb, _>(json!(null)))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!(r#"null"#, result);
    ///
    /// let result = diesel::select(jsonb_pretty::<Jsonb, _>(json!({})))
    ///     .get_result::<String>(connection)?;
    ///
    /// assert_eq!(r#"{
    /// }"#, result);
    ///
    /// let result = diesel::select(jsonb_pretty::<Nullable<Jsonb>, _>(None::<Value>))
    ///     .get_result::<Option<String>>(connection)?;
    ///
    /// assert!(result.is_none());
    /// #     Ok(())
    /// # }
    /// ```
    fn jsonb_pretty<E: JsonbOrNullableJsonb + SingleValue + MaybeNullableValue<Text>>(e: E) -> E::Out;
}

define_sql_function! {
    /// Deletes all object fields that have null values from the given JSON value, recursively.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::json_strip_nulls;
    /// #     use diesel::sql_types::{Json, Nullable};
    /// #     use serde_json::{json, Value};
    /// #     let connection = &mut establish_connection();
    ///
    /// let result = diesel::select(json_strip_nulls::<Json, _>(json!({"hello": null})))
    ///     .get_result::<Value>(connection)?;
    /// let expected: Value = json!({});
    /// assert_eq!(result, expected);
    ///
    /// let result = diesel::select(json_strip_nulls::<Json, _>(json!([{"f1":1, "f2":null}, 2, null, 3])))
    ///     .get_result::<Value>(connection)?;
    /// let expected: Value = json!([{"f1":1}, 2, null, 3]);
    /// assert_eq!(result, expected);
    ///
    /// let result = diesel::select(json_strip_nulls::<Nullable<Json>, _>(None::<Value>))
    ///     .get_result::<Option<Value>>(connection)?;
    /// assert!(result.is_none());
    ///
    /// let result = diesel::select(json_strip_nulls::<Json, _>(json!(null)))
    ///     .get_result::<Value>(connection)?;
    /// let expected = json!(null);
    /// assert_eq!(result, expected);
    ///
    ///
    /// #     Ok(())
    /// # }
    /// ```
    fn json_strip_nulls<E: JsonOrNullableJson + SingleValue>(json: E) -> E;
}

define_sql_function! {
    /// Deletes all object fields that have null values from the given JSON value, recursively.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::jsonb_strip_nulls;
    /// #     use diesel::sql_types::{Jsonb, Nullable};
    /// #     use serde_json::{json, Value};
    /// #     let connection = &mut establish_connection();
    ///
    /// let result = diesel::select(jsonb_strip_nulls::<Jsonb, _>(json!({"hello": null})))
    ///     .get_result::<Value>(connection)?;
    /// let expected: Value = json!({});
    /// assert_eq!(result, expected);
    ///
    /// let result = diesel::select(jsonb_strip_nulls::<Jsonb, _>(json!([{"f1":1, "f2":null}, 2, null, 3])))
    ///     .get_result::<Value>(connection)?;
    /// let expected: Value = json!([{"f1":1}, 2, null, 3]);
    /// assert_eq!(result, expected);
    ///
    /// let result = diesel::select(jsonb_strip_nulls::<Nullable<Jsonb>, _>(None::<Value>))
    ///     .get_result::<Option<Value>>(connection)?;
    /// assert!(result.is_none());
    ///
    /// let result = diesel::select(jsonb_strip_nulls::<Jsonb, _>(json!(null)))
    ///     .get_result::<Value>(connection)?;
    /// let expected = json!(null);
    /// assert_eq!(result, expected);
    ///
    ///
    ///
    /// #     Ok(())
    /// # }
    /// ```
    fn jsonb_strip_nulls<E: JsonbOrNullableJsonb + SingleValue>(jsonb: E) -> E;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Returns the number of elements in the top-level JSON array
    ///
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::json_array_length;
    /// #     use serde_json::{json, Value};
    /// #     use diesel::sql_types::{Integer, Json, Nullable};
    /// #     let connection = &mut establish_connection();
    ///
    /// let result = diesel::select(json_array_length::<Json, _>(json!([1, 2, 3])))
    ///     .get_result::<i32>(connection)?;
    /// assert_eq!(result, 3);
    ///
    /// let result = diesel::select(json_array_length::<Json, _>(json!([])))
    ///     .get_result::<i32>(connection)?;
    /// assert_eq!(result, 0);
    ///
    /// let result = diesel::select(json_array_length::<Nullable<Json>, _>(None::<Value>))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert!(result.is_none());
    ///
    ///
    ///
    /// #     Ok(())
    /// # }
    /// ```

    fn json_array_length<E: JsonOrNullableJson + MaybeNullableValue<Integer>>(json: E) -> E::Out;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Returns the number of elements in the top-level JSON array
    ///
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::jsonb_array_length;
    /// #     use serde_json::{json, Value};
    /// #     use diesel::sql_types::{Integer, Jsonb, Nullable};
    /// #     let connection = &mut establish_connection();
    ///
    /// let result = diesel::select(jsonb_array_length::<Jsonb, _>(json!([1, 2, 3])))
    ///     .get_result::<i32>(connection)?;
    /// assert_eq!(result, 3);
    ///
    /// let result = diesel::select(jsonb_array_length::<Jsonb, _>(json!([])))
    ///     .get_result::<i32>(connection)?;
    /// assert_eq!(result, 0);
    ///
    /// let result = diesel::select(jsonb_array_length::<Nullable<Jsonb>, _>(None::<Value>))
    ///     .get_result::<Option<i32>>(connection)?;
    /// assert!(result.is_none());
    ///
    ///
    ///
    /// #     Ok(())
    /// # }
    /// ```

    fn jsonb_array_length<E: JsonbOrNullableJsonb + MaybeNullableValue<Integer>>(jsonb: E) -> E::Out;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// Builds a JSON object out of a text array. The array must have an even number of members,
    /// in which case they are taken as alternating key/value pairs. This function also has a form that
    /// that takes keys and values as separate text array arguments.
    /// See [jsonb_object_with_keys_and_values]
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::jsonb_object;
    /// #     use diesel::sql_types::{Array, Json, Nullable, Text};
    /// #     use serde_json::Value;
    /// #     let connection = &mut establish_connection();
    /// let jsonb = diesel::select(jsonb_object::<Array<Text>,_>(vec!["hello","world"]))
    ///                 .get_result::<Value>(connection)?;
    /// let expected:Value = serde_json::json!({"hello":"world"});
    /// assert_eq!(expected, jsonb);
    ///
    /// let jsonb = diesel::select(jsonb_object::<Array<Text>, _>(vec!["hello","world","John","Doe"]))
    ///                 .get_result::<Value>(connection)?;
    /// let expected:Value = serde_json::json!({"hello": "world","John": "Doe"});
    /// assert_eq!(expected, jsonb);
    ///
    /// let jsonb = diesel::select(jsonb_object::<Nullable<Array<Text>>, _>(None::<Vec<String>>))
    ///                 .get_result::<Option<Value>>(connection)?;
    /// assert!(jsonb.is_none());
    ///
    /// let empty:Vec<String> = Vec::new();
    /// let jsonb = diesel::select(jsonb_object::<Array<Nullable<Text>>,_>(empty))
    ///                 .get_result::<Value>(connection)?;
    /// let expected = serde_json::json!({});
    /// assert_eq!(expected, jsonb);
    ///
    /// let jsonb = diesel::select(jsonb_object::<Array<Text>, _>(vec!["hello","world","John"]))
    ///                 .get_result::<Value>(connection);
    /// assert!(jsonb.is_err());
    ///
    ///
    /// #     Ok(())
    /// # }
    /// ```
    fn jsonb_object<Arr: TextArrayOrNullableTextArray + MaybeNullableValue<Jsonb>>(
        text_array: Arr,
    ) -> Arr::Out;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// This form of jsonb_object takes keys and values pairwise from two separate arrays.
    /// In all other respects it is identical to the one-argument form.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::jsonb_object_with_keys_and_values;
    /// #     use diesel::sql_types::{Array, Nullable, Text};
    /// #     use serde_json::Value;
    /// #     let connection = &mut establish_connection();
    /// let jsonb = diesel::select(jsonb_object_with_keys_and_values::<Array<Text>, Array<Text>, _, _>(
    ///             vec!["hello","John"],vec!["world","Doe"]))
    ///             .get_result::<Value>(connection)?;
    /// let expected:Value = serde_json::json!({"hello":"world","John":"Doe"});
    /// assert_eq!(expected, jsonb);
    ///
    /// let jsonb = diesel::select(jsonb_object_with_keys_and_values::<Nullable<Array<Text>>, Nullable<Array<Text>>, _, _>(
    ///             Some(vec!["hello","John"]),None::<Vec<String>>))
    ///             .get_result::<Option<Value>>(connection)?;
    /// assert_eq!(None::<Value>,jsonb);
    ///
    /// let empty: Vec<String> = Vec::new();
    /// let jsonb = diesel::select(jsonb_object_with_keys_and_values::<Array<Text>, Array<Text>, _, _>(
    ///             vec!["hello","John"],empty))
    ///             .get_result::<Value>(connection);
    /// assert!(jsonb.is_err());
    ///
    /// #     Ok(())
    /// # }
    /// ```
    #[sql_name = "jsonb_object"]
    fn jsonb_object_with_keys_and_values<
        Arr1: TextArrayOrNullableTextArray + SingleValue,
        Arr2: TextArrayOrNullableTextArray + CombinedNullableValue<Arr1, Jsonb>
    >(
        keys: Arr1,
        values: Arr2
    ) -> Arr2::Out;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// This function `row_to_json` takes a Record type as an input and converts it to JSON.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::row_to_json;
    /// #     use diesel::dsl::sql;
    /// #     use diesel::sql_types::{Record, Text, Integer};
    /// #     use serde_json::Value;
    /// #     let connection = &mut establish_connection();
    ///
    /// let json_value = diesel::select(row_to_json(sql::<Record<(Text, Integer)>>(
    ///     "ROW('John', 30)"
    /// )))
    /// .get_result::<Value>(connection)?;
    /// let expected: Value = serde_json::json!({
    ///     "f1": "John",
    ///     "f2": 30
    /// });
    /// assert_eq!(expected, json_value);
    ///
    /// let json_value = diesel::select(row_to_json(sql::<Record<()>>("ROW()")))
    /// .get_result::<Value>(connection)?;
    /// let expected: Value = serde_json::json!({});
    /// assert_eq!(expected, json_value);
    ///
    /// #    Ok(())
    /// # }
    /// ```
    #[sql_name = "row_to_json"]
    fn row_to_json<R: RecordOrNullableRecord + MaybeNullableValue<Json>>(record: R) -> R::Out;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// This function `json_populate_record` takes a Record base and Json as an input and converts it to top-level
    /// JSON object to a row having the composite type of the base argument.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::json_populate_record;
    /// #     use diesel::dsl::sql;
    /// #     use diesel::sql_types::{Record, Text, Integer, Json};
    /// #     use serde_json::Value;
    /// #     let connection = &mut establish_connection();
    ///
    /// let expected: Value = serde_json::json!({
    ///     "f1": "Alice",
    ///     "f2": 16
    /// });
    /// let record: (String, i32) = diesel::select(json_populate_record::<Record<(Text, Integer)>, Json, _, _>(
    ///         sql::<Record<(Text, Integer)>>("ROW('John', 30)"),
    ///         expected
    /// )).get_result(connection)?;
    /// assert_eq!(record, ("Alice".to_string(), 16));
    ///
    /// let expected: Value = serde_json::json!({});
    /// let record: (String, i32) = diesel::select(json_populate_record::<Record<(Text, Integer)>, Json, _, _>(
    ///         sql::<Record<(Text, Integer)>>("ROW('John', 30)"),
    ///         expected
    /// )).get_result(connection)?;
    /// assert_eq!(record, ("John".to_string(), 30));
    ///
    /// let expected: Value = serde_json::json!({
    ///     "f1": "Alice"
    /// });
    /// let record: (String, i32) = diesel::select(json_populate_record::<Record<(Text, Integer)>, Json, _, _>(
    ///         sql::<Record<(Text, Integer)>>("ROW('John', 30)"),
    ///         expected
    /// )).get_result(connection)?;
    /// assert_eq!(record, ("Alice".to_string(), 30));
    ///
    /// #    Ok(())
    /// # }
    /// ```
    #[sql_name = "json_populate_record"]
    fn json_populate_record<
        B: RecordOrNullableRecord + SingleValue,
        J: JsonOrNullableJson + CombinedAllNullableValue<Json, B>
    >(base: B, from_json: J) -> J::Out;
}

#[cfg(feature = "postgres_backend")]
define_sql_function! {
    /// This function `jsonb_populate_record` takes a Record base and Jsonb as an input and converts it to top-level
    /// JSON object to a row having the composite type of the base argument.
    ///
    /// # Example
    ///
    /// ```rust
    /// # include!("../../doctest_setup.rs");
    /// #
    /// # fn main() {
    /// #     #[cfg(feature = "serde_json")]
    /// #     run_test().unwrap();
    /// # }
    /// #
    /// # #[cfg(feature = "serde_json")]
    /// # fn run_test() -> QueryResult<()> {
    /// #     use diesel::dsl::jsonb_populate_record;
    /// #     use diesel::dsl::sql;
    /// #     use diesel::sql_types::{Record, Text, Integer, Jsonb};
    /// #     use serde_json::Value;
    /// #     let connection = &mut establish_connection();
    ///
    /// let expected: Value = serde_json::json!({
    ///     "f1": "Alice",
    ///     "f2": 16
    /// });
    /// let record: (String, i32) = diesel::select(jsonb_populate_record::<Record<(Text, Integer)>, Jsonb, _, _>(
    ///         sql::<Record<(Text, Integer)>>("ROW('John', 30)"),
    ///         expected
    /// )).get_result(connection)?;
    /// assert_eq!(record, ("Alice".to_string(), 16));
    ///
    /// let expected: Value = serde_json::json!({});
    /// let record: (String, i32) = diesel::select(jsonb_populate_record::<Record<(Text, Integer)>, Jsonb, _, _>(
    ///         sql::<Record<(Text, Integer)>>("ROW('John', 30)"),
    ///         expected
    /// )).get_result(connection)?;
    /// assert_eq!(record, ("John".to_string(), 30));
    ///
    /// let expected: Value = serde_json::json!({
    ///     "f2": 42,
    /// });
    /// let record: (String, i32) = diesel::select(jsonb_populate_record::<Record<(Text, Integer)>, Jsonb, _, _>(
    ///         sql::<Record<(Text, Integer)>>("ROW('John', 30)"),
    ///         expected
    /// )).get_result(connection)?;
    /// assert_eq!(record, ("John".to_string(), 42));
    ///
    /// #    Ok(())
    /// # }
    /// ```
    #[sql_name = "jsonb_populate_record"]
    fn jsonb_populate_record<
        B: RecordOrNullableRecord + SingleValue,
        J: JsonbOrNullableJsonb + CombinedAllNullableValue<Jsonb, B>
    >(base: B, from_json: J) -> J::Out;
}