migration

Struct Func

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pub struct Func;
Expand description

Function call helper.

Implementations§

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impl Func

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pub fn cust<T>(func: T) -> Expr
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 FmtWrite) {
        write!(s, "MY_FUNCTION").unwrap();
    }
}

let query = Query::select()
    .expr(Func::cust(MyFunction).args(vec![Expr::val("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')"#
);
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pub fn max<T>(expr: T) -> SimpleExpr
where T: Into<SimpleExpr>,

Call MAX function.

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

let query = Query::select()
    .expr(Func::max(Expr::tbl(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""#
);
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pub fn min<T>(expr: T) -> SimpleExpr
where T: Into<SimpleExpr>,

Call MIN function.

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

let query = Query::select()
    .expr(Func::min(Expr::tbl(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""#
);
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pub fn sum<T>(expr: T) -> SimpleExpr
where T: Into<SimpleExpr>,

Call SUM function.

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

let query = Query::select()
    .expr(Func::sum(Expr::tbl(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""#
);
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pub fn avg<T>(expr: T) -> SimpleExpr
where T: Into<SimpleExpr>,

Call AVG function.

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

let query = Query::select()
    .expr(Func::avg(Expr::tbl(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""#
);
Source

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

Call ABS function.

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

let query = Query::select()
    .expr(Func::abs(Expr::tbl(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""#
);
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pub fn count<T>(expr: T) -> SimpleExpr
where T: Into<SimpleExpr>,

Call COUNT function.

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

let query = Query::select()
    .expr(Func::count(Expr::tbl(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""#
);
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pub fn char_length<T>(expr: T) -> SimpleExpr
where T: Into<SimpleExpr>,

Call CHAR_LENGTH function.

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

let query = Query::select()
    .expr(Func::char_length(Expr::tbl(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""#
);
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pub fn if_null<A, B>(a: A, b: B) -> SimpleExpr
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""#
);
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pub fn cast_as<V, I>(value: V, iden: I) -> SimpleExpr
where V: Into<Value>, I: IntoIden,

Call CAST function with a custom type.

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

let query = Query::select()
    .expr(Func::cast_as("hello", Alias::new("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)"#
);
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pub fn coalesce<I, T>(args: I) -> SimpleExpr
where T: Into<SimpleExpr>, I: IntoIterator<Item = T>,

Call COALESCE function.

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

let query = Query::select()
    .expr(Func::coalesce([
        Expr::col(Char::SizeW),
        Expr::col(Char::SizeH),
        Expr::val(12),
    ]))
    .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""#
);
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pub fn lower<T>(expr: T) -> SimpleExpr
where T: Into<SimpleExpr>,

Call LOWER function.

§Examples
use sea_query::tests_cfg::Character::Character;
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""#
);
Source

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

Call UPPER function.

§Examples
use sea_query::tests_cfg::Character::Character;
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""#
);
Source

pub fn current_timestamp() -> SimpleExpr

Call CURRENT_TIMESTAMP function.

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

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

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

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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const fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Func

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl Freeze for Func

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impl RefUnwindSafe for Func

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impl Send for Func

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impl Sync for Func

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impl Unpin for Func

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impl UnwindSafe for Func

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

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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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> ErasedDestructor for T
where T: 'static,