Func

migration::sea_orm::sea_query::func

Struct Func 

pub struct Func;
Expand description

Function call helper.

Implementations§

§

impl Func

pub fn cust<T>(func: T) -> FunctionCall
where T: IntoIden,

Call a custom function.

§Examples
use sea_query::{tests_cfg::*, *};

struct MyFunction;

impl Iden for MyFunction {
    fn unquoted(&self, s: &mut dyn Write) {
        write!(s, "MY_FUNCTION").unwrap();
    }
}

let query = Query::select()
    .expr(Func::cust(MyFunction).arg("hello"))
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT MY_FUNCTION('hello')"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT MY_FUNCTION('hello')"#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT MY_FUNCTION('hello')"#
);

pub fn max<T>(expr: T) -> FunctionCall
where T: Into<SimpleExpr>,

Call MAX function.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::max(Expr::col((Char::Table, Char::SizeW))))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT MAX(`character`.`size_w`) FROM `character`"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT MAX("character"."size_w") FROM "character""#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT MAX("character"."size_w") FROM "character""#
);

pub fn min<T>(expr: T) -> FunctionCall
where T: Into<SimpleExpr>,

Call MIN function.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::min(Expr::col((Char::Table, Char::SizeH))))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT MIN(`character`.`size_h`) FROM `character`"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT MIN("character"."size_h") FROM "character""#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT MIN("character"."size_h") FROM "character""#
);

pub fn sum<T>(expr: T) -> FunctionCall
where T: Into<SimpleExpr>,

Call SUM function.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::sum(Expr::col((Char::Table, Char::SizeH))))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT SUM(`character`.`size_h`) FROM `character`"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT SUM("character"."size_h") FROM "character""#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT SUM("character"."size_h") FROM "character""#
);

pub fn avg<T>(expr: T) -> FunctionCall
where T: Into<SimpleExpr>,

Call AVG function.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::avg(Expr::col((Char::Table, Char::SizeH))))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT AVG(`character`.`size_h`) FROM `character`"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT AVG("character"."size_h") FROM "character""#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT AVG("character"."size_h") FROM "character""#
);

pub fn abs<T>(expr: T) -> FunctionCall
where T: Into<SimpleExpr>,

Call ABS function.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::abs(Expr::col((Char::Table, Char::SizeH))))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT ABS(`character`.`size_h`) FROM `character`"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT ABS("character"."size_h") FROM "character""#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT ABS("character"."size_h") FROM "character""#
);

pub fn count<T>(expr: T) -> FunctionCall
where T: Into<SimpleExpr>,

Call COUNT function.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::count(Expr::col((Char::Table, Char::Id))))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT COUNT(`character`.`id`) FROM `character`"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT COUNT("character"."id") FROM "character""#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT COUNT("character"."id") FROM "character""#
);

pub fn count_distinct<T>(expr: T) -> FunctionCall
where T: Into<SimpleExpr>,

Call COUNT function with the DISTINCT modifier.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::count_distinct(Expr::col((Char::Table, Char::Id))))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT COUNT(DISTINCT `character`.`id`) FROM `character`"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT COUNT(DISTINCT "character"."id") FROM "character""#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT COUNT(DISTINCT "character"."id") FROM "character""#
);

pub fn char_length<T>(expr: T) -> FunctionCall
where T: Into<SimpleExpr>,

Call CHAR_LENGTH function.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::char_length(Expr::col((Char::Table, Char::Character))))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT CHAR_LENGTH(`character`.`character`) FROM `character`"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT CHAR_LENGTH("character"."character") FROM "character""#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT LENGTH("character"."character") FROM "character""#
);

pub fn greatest<I>(args: I) -> FunctionCall
where I: IntoIterator<Item = SimpleExpr>,

Call GREATEST function.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::greatest([
        Expr::col(Char::SizeW).into(),
        Expr::col(Char::SizeH).into(),
    ]))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT GREATEST(`size_w`, `size_h`) FROM `character`"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT GREATEST("size_w", "size_h") FROM "character""#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT MAX("size_w", "size_h") FROM "character""#
);

pub fn least<I>(args: I) -> FunctionCall
where I: IntoIterator<Item = SimpleExpr>,

Call LEAST function.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::least([
        Expr::col(Char::SizeW).into(),
        Expr::col(Char::SizeH).into(),
    ]))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT LEAST(`size_w`, `size_h`) FROM `character`"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT LEAST("size_w", "size_h") FROM "character""#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT MIN("size_w", "size_h") FROM "character""#
);

pub fn if_null<A, B>(a: A, b: B) -> FunctionCall
where A: Into<SimpleExpr>, B: Into<SimpleExpr>,

Call IF NULL function.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::if_null(
        Expr::col(Char::SizeW),
        Expr::col(Char::SizeH),
    ))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT IFNULL(`size_w`, `size_h`) FROM `character`"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT COALESCE("size_w", "size_h") FROM "character""#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT IFNULL("size_w", "size_h") FROM "character""#
);

pub fn cast_as<V, I>(expr: V, iden: I) -> FunctionCall
where V: Into<SimpleExpr>, I: IntoIden,

Call CAST function with a custom type.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::cast_as("hello", "MyType"))
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT CAST('hello' AS MyType)"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT CAST('hello' AS MyType)"#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT CAST('hello' AS MyType)"#
);

pub fn cast_as_quoted<V, I>(expr: V, iden: I, q: Quote) -> FunctionCall
where V: Into<SimpleExpr>, I: IntoIden,

Call CAST function with a case-sensitive custom type.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::cast_as_quoted("hello", "MyType", '"'.into()))
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT CAST('hello' AS "MyType")"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT CAST('hello' AS "MyType")"#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT CAST('hello' AS "MyType")"#
);

pub fn coalesce<I>(args: I) -> FunctionCall
where I: IntoIterator<Item = SimpleExpr>,

Call COALESCE function.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::coalesce([
        Expr::col(Char::SizeW).into(),
        Expr::col(Char::SizeH).into(),
        Expr::val(12).into(),
    ]))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT COALESCE(`size_w`, `size_h`, 12) FROM `character`"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT COALESCE("size_w", "size_h", 12) FROM "character""#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT COALESCE("size_w", "size_h", 12) FROM "character""#
);

pub fn lower<T>(expr: T) -> FunctionCall
where T: Into<SimpleExpr>,

Call LOWER function.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::lower(Expr::col(Char::Character)))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT LOWER(`character`) FROM `character`"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT LOWER("character") FROM "character""#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT LOWER("character") FROM "character""#
);
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .column(Font::Id)
    .from(Font::Table)
    .and_where(Func::lower(Expr::col(Font::Name)).eq("abc".trim().to_lowercase()))
    .take();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    "SELECT `id` FROM `font` WHERE LOWER(`name`) = 'abc'"
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT "id" FROM "font" WHERE LOWER("name") = 'abc'"#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT "id" FROM "font" WHERE LOWER("name") = 'abc'"#
);

pub fn upper<T>(expr: T) -> FunctionCall
where T: Into<SimpleExpr>,

Call UPPER function.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::upper(Expr::col(Char::Character)))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT UPPER(`character`) FROM `character`"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT UPPER("character") FROM "character""#
);
assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT UPPER("character") FROM "character""#
);

pub fn bit_and<T>(expr: T) -> FunctionCall
where T: Into<SimpleExpr>,

Call BIT_AND function, this is not supported on SQLite.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::bit_and(Expr::col(Char::FontSize)))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT BIT_AND(`font_size`) FROM `character`"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT BIT_AND("font_size") FROM "character""#
);

pub fn bit_or<T>(expr: T) -> FunctionCall
where T: Into<SimpleExpr>,

Call BIT_OR function, this is not supported on SQLite.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::bit_or(Expr::col(Char::FontSize)))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT BIT_OR(`font_size`) FROM `character`"#
);
assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT BIT_OR("font_size") FROM "character""#
);

pub fn round<A>(expr: A) -> FunctionCall
where A: Into<SimpleExpr>,

Call ROUND function.

§Examples
use sea_query::tests_cfg::Character::Character;
use sea_query::{tests_cfg::*, *};

let query = Query::select().expr(Func::round(5.654)).to_owned();

assert_eq!(query.to_string(MysqlQueryBuilder), r#"SELECT ROUND(5.654)"#);

assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT ROUND(5.654)"#
);

assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT ROUND(5.654)"#
);

pub fn round_with_precision<A, B>(a: A, b: B) -> FunctionCall
where A: Into<SimpleExpr>, B: Into<SimpleExpr>,

Call ROUND function with the precision.

§Examples
use sea_query::tests_cfg::Character::Character;
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::round_with_precision(5.654, 2))
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT ROUND(5.654, 2)"#
);

assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT ROUND(5.654, 2)"#
);

assert_eq!(
    query.to_string(SqliteQueryBuilder),
    r#"SELECT ROUND(5.654, 2)"#
);

pub fn random() -> FunctionCall

Call RANDOM function.

§Examples
use sea_query::tests_cfg::Character::Character;
use sea_query::{tests_cfg::*, *};

let query = Query::select().expr(Func::random()).to_owned();

assert_eq!(query.to_string(MysqlQueryBuilder), r#"SELECT RAND()"#);

assert_eq!(query.to_string(PostgresQueryBuilder), r#"SELECT RANDOM()"#);

assert_eq!(query.to_string(SqliteQueryBuilder), r#"SELECT RANDOM()"#);

pub fn md5<T>(expr: T) -> FunctionCall
where T: Into<SimpleExpr>,

Call MD5 function, this is only available in Postgres and MySQL.

§Examples
use sea_query::{tests_cfg::*, *};

let query = Query::select()
    .expr(Func::md5(Expr::col((Char::Table, Char::Character))))
    .from(Char::Table)
    .to_owned();

assert_eq!(
    query.to_string(MysqlQueryBuilder),
    r#"SELECT MD5(`character`.`character`) FROM `character`"#
);

assert_eq!(
    query.to_string(PostgresQueryBuilder),
    r#"SELECT MD5("character"."character") FROM "character""#
);

Trait Implementations§

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impl Clone for Func

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fn clone(&self) -> Func

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more

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impl UnwindSafe for Func

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Immutably borrows from an owned value. Read more
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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