Module diesel::dsl[−][src]

Expand description

Includes various helper types and bare functions which are named too generically to be included in prelude, but are often used when using Diesel.

Re-exports

pub use crate::pg::expression::dsl::*;

Structs

now

Represents the SQL CURRENT_TIMESTAMP constant. This is equivalent to the NOW() function on backends that support it.

today

Represents the SQL CURRENT_DATE constant.

Functions

avg

Represents a SQL AVG function. This function can only take types which are Foldable.

count

Creates a SQL COUNT expression

count_distinct

Creates a SQL COUNT(DISTINCT ...) expression

count_star

Creates a SQL COUNT(*) expression

date

Represents the SQL DATE function. The argument should be a Timestamp expression, and the return value will be an expression of type Date.

delete

Creates a DELETE statement.

exists

Creates a SQL EXISTS expression.

insert_into

Creates an INSERT statement for the target table.

insert_or_ignore_into

Creates an INSERT [OR] IGNORE statement.

max

Represents a SQL MAX function. This function can only take types which are ordered.

min

Represents a SQL MIN function. This function can only take types which are ordered.

not

Creates a SQL NOT expression

replace_into

Creates a REPLACE statement.

select

Creates a bare select statement, with no from clause. Primarily used for testing diesel itself, but likely useful for third party crates as well. The given expressions must be selectable from anywhere.

sql

Use literal SQL in the query builder.

sql_query

Construct a full SQL query using raw SQL.

sum

Represents a SQL SUM function. This function can only take types which are Foldable.

update

Creates an UPDATE statement.

Type Definitions

And

The return type of lhs.and(rhs)

AndNet

The return type of lsh.and(rhs)

ArrayContains

The return type of lhs.contains(rhs) for array expressions

AsExpr

The type of Item when converted to an expression with the same type as TargetExpr

AsExprOf

The type of Item when converted to an expression of Type

Asc

The return type of expr.asc()

AssumeNotNull

The return type of expr.assume_not_null()

AtTimeZone

The return type of expr.at_time_zone(tz)

BareSelect

Represents the return type of diesel::select(selection)

Between

The return type of lhs.between(lower, upper)

Concat

The return type of lhs.concat(rhs)

ContainsNet

The return type of lsh.contains(rhs)

ContainsNetLoose

The return type of lsh.contains_or_eq(rhs)

Desc

The return type of expr.desc()

DifferenceNet

The return type of lsh.diff(rhs)

Distinct

Represents the return type of .distinct()

DistinctOn

Represents the return type of .distinct_on(expr)

Eq

The return type of lhs.eq(rhs)

EqAny

The return type of lhs.eq_any(rhs)

Escape

The return type of lhs.escape('x')

Except

Represents the return type of .except(rhs)

ExceptAll

Represents the return type of .except_all(rhs)

Filter

Represents the return type of .filter(predicate)

Find

Represents the return type of .find(pk)

FindBy

Represents the return type of .filter(lhs.eq(rhs))

ForKeyShare

Represents the return type of .for_key_share()

ForNoKeyUpdate

Represents the return type of .for_no_key_update()

ForShare

Represents the return type of .for_share()

ForUpdate

Represents the return type of .for_update()

GroupBy

Represents the return type of .group_by(expr)

Gt

The return type of lhs.gt(rhs)

GtEq

The return type of lhs.ge(rhs)

Having

Represents the return type of .having(predicate)

ILike

The return type of lhs.ilike(rhs)

InnerJoin

Represents the return type of .inner_join(rhs)

InnerJoinOn

Represents the return type of .inner_join(rhs.on(on))

InnerJoinQuerySource

A query source representing the inner join between two tables. For example, for the inner join between three tables that implement JoinTo: InnerJoinQuerySource<InnerJoinQuerySource<table1, table2>, table3> Which conveniently lets you omit the exact join condition.

Intersect

Represents the return type of .intersect(rhs)

IntersectAll

Represents the return type of .intersect_all(rhs)

IntoBoxed

Represents the return type of .into_boxed::<'a, DB>()

Is

The return type of lhs.is(rhs).

IsContainedBy

The return type of lhs.is_contained_by(rhs)

IsContainedByNet

The return type of lsh.is_contained_by(rhs)

IsContainedByNetLoose

The return type of lsh.is_contained_by_or_eq(rhs)

IsDistinctFrom

The return type of lhs.is_distinct_from(rhs)

IsNot

The return type of lhs.is_not(rhs).

IsNotDistinctFrom

The return type of lhs.is_not_distinct_from(rhs)

IsNotNull

The return type of expr.is_not_null()

IsNull

The return type of expr.is_null()

LeftJoin

Represents the return type of .left_join(rhs)

LeftJoinOn

Represents the return type of .left_join(rhs.on(on))

LeftJoinQuerySource

A query source representing the left outer join between two tables. For example, for the left join between three tables that implement JoinTo: LeftJoinQuerySource<LeftJoinQuerySource<table1, table2>, table3> Which conveniently lets you omit the exact join condition.

Like

The return type of lhs.like(rhs)

Limit

Represents the return type of .limit()

Lt

The return type of lhs.lt(rhs)

LtEq

The return type of lhs.le(rhs)

NeAny

The return type of lhs.ne_all(rhs)

NoWait

Represents the return type of .no_wait()