Trait rocket_db_pools::diesel::prelude::Expression

pub trait Expression {
    type SqlType: TypedExpressionType;
}

Represents a typed fragment of SQL.

Apps should not need to implement this type directly, but it may be common to use this in where clauses. Libraries should consider using infix_operator! or postfix_operator! instead of implementing this directly.

Required Associated Types

type SqlType: TypedExpressionType

The type that this expression represents in SQL

Implementations on Foreign Types

impl<'a, T> Expression for &'a T

where T: Expression + ?Sized,

type SqlType = <T as Expression>::SqlType

impl<T0> Expression for (T0,)

where T0: Expression, (<T0 as Expression>::SqlType,): TypedExpressionType,

type SqlType = (<T0 as Expression>::SqlType,)

impl<T0, T1> Expression for (T0, T1)

where T0: Expression, T1: Expression, (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType): TypedExpressionType,

type SqlType = (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType)

impl<T0, T1, T2> Expression for (T0, T1, T2)

where T0: Expression, T1: Expression, T2: Expression, (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType): TypedExpressionType,

type SqlType = (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType)

impl<T0, T1, T2, T3> Expression for (T0, T1, T2, T3)

where T0: Expression, T1: Expression, T2: Expression, T3: Expression, (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType): TypedExpressionType,

type SqlType = (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType)

impl<T0, T1, T2, T3, T4> Expression for (T0, T1, T2, T3, T4)

where T0: Expression, T1: Expression, T2: Expression, T3: Expression, T4: Expression, (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType): TypedExpressionType,

type SqlType = (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType)

impl<T0, T1, T2, T3, T4, T5> Expression for (T0, T1, T2, T3, T4, T5)

where T0: Expression, T1: Expression, T2: Expression, T3: Expression, T4: Expression, T5: Expression, (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType): TypedExpressionType,

type SqlType = (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType)

impl<T0, T1, T2, T3, T4, T5, T6> Expression for (T0, T1, T2, T3, T4, T5, T6)

where T0: Expression, T1: Expression, T2: Expression, T3: Expression, T4: Expression, T5: Expression, T6: Expression, (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType): TypedExpressionType,

type SqlType = (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType)

impl<T0, T1, T2, T3, T4, T5, T6, T7> Expression for (T0, T1, T2, T3, T4, T5, T6, T7)

where T0: Expression, T1: Expression, T2: Expression, T3: Expression, T4: Expression, T5: Expression, T6: Expression, T7: Expression, (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType): TypedExpressionType,

type SqlType = (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType)

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8> Expression for (T0, T1, T2, T3, T4, T5, T6, T7, T8)

where T0: Expression, T1: Expression, T2: Expression, T3: Expression, T4: Expression, T5: Expression, T6: Expression, T7: Expression, T8: Expression, (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType, <T8 as Expression>::SqlType): TypedExpressionType,

type SqlType = (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType, <T8 as Expression>::SqlType)

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9> Expression for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9)

where T0: Expression, T1: Expression, T2: Expression, T3: Expression, T4: Expression, T5: Expression, T6: Expression, T7: Expression, T8: Expression, T9: Expression, (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType, <T8 as Expression>::SqlType, <T9 as Expression>::SqlType): TypedExpressionType,

type SqlType = (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType, <T8 as Expression>::SqlType, <T9 as Expression>::SqlType)

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> Expression for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10)

where T0: Expression, T1: Expression, T2: Expression, T3: Expression, T4: Expression, T5: Expression, T6: Expression, T7: Expression, T8: Expression, T9: Expression, T10: Expression, (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType, <T8 as Expression>::SqlType, <T9 as Expression>::SqlType, <T10 as Expression>::SqlType): TypedExpressionType,

type SqlType = (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType, <T8 as Expression>::SqlType, <T9 as Expression>::SqlType, <T10 as Expression>::SqlType)

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> Expression for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11)

where T0: Expression, T1: Expression, T2: Expression, T3: Expression, T4: Expression, T5: Expression, T6: Expression, T7: Expression, T8: Expression, T9: Expression, T10: Expression, T11: Expression, (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType, <T8 as Expression>::SqlType, <T9 as Expression>::SqlType, <T10 as Expression>::SqlType, <T11 as Expression>::SqlType): TypedExpressionType,

type SqlType = (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType, <T8 as Expression>::SqlType, <T9 as Expression>::SqlType, <T10 as Expression>::SqlType, <T11 as Expression>::SqlType)

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> Expression for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12)

where T0: Expression, T1: Expression, T2: Expression, T3: Expression, T4: Expression, T5: Expression, T6: Expression, T7: Expression, T8: Expression, T9: Expression, T10: Expression, T11: Expression, T12: Expression, (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType, <T8 as Expression>::SqlType, <T9 as Expression>::SqlType, <T10 as Expression>::SqlType, <T11 as Expression>::SqlType, <T12 as Expression>::SqlType): TypedExpressionType,

type SqlType = (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType, <T8 as Expression>::SqlType, <T9 as Expression>::SqlType, <T10 as Expression>::SqlType, <T11 as Expression>::SqlType, <T12 as Expression>::SqlType)

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13> Expression for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13)

where T0: Expression, T1: Expression, T2: Expression, T3: Expression, T4: Expression, T5: Expression, T6: Expression, T7: Expression, T8: Expression, T9: Expression, T10: Expression, T11: Expression, T12: Expression, T13: Expression, (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType, <T8 as Expression>::SqlType, <T9 as Expression>::SqlType, <T10 as Expression>::SqlType, <T11 as Expression>::SqlType, <T12 as Expression>::SqlType, <T13 as Expression>::SqlType): TypedExpressionType,

type SqlType = (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType, <T8 as Expression>::SqlType, <T9 as Expression>::SqlType, <T10 as Expression>::SqlType, <T11 as Expression>::SqlType, <T12 as Expression>::SqlType, <T13 as Expression>::SqlType)

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14> Expression for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14)

where T0: Expression, T1: Expression, T2: Expression, T3: Expression, T4: Expression, T5: Expression, T6: Expression, T7: Expression, T8: Expression, T9: Expression, T10: Expression, T11: Expression, T12: Expression, T13: Expression, T14: Expression, (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType, <T8 as Expression>::SqlType, <T9 as Expression>::SqlType, <T10 as Expression>::SqlType, <T11 as Expression>::SqlType, <T12 as Expression>::SqlType, <T13 as Expression>::SqlType, <T14 as Expression>::SqlType): TypedExpressionType,

type SqlType = (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType, <T8 as Expression>::SqlType, <T9 as Expression>::SqlType, <T10 as Expression>::SqlType, <T11 as Expression>::SqlType, <T12 as Expression>::SqlType, <T13 as Expression>::SqlType, <T14 as Expression>::SqlType)

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15> Expression for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15)

where T0: Expression, T1: Expression, T2: Expression, T3: Expression, T4: Expression, T5: Expression, T6: Expression, T7: Expression, T8: Expression, T9: Expression, T10: Expression, T11: Expression, T12: Expression, T13: Expression, T14: Expression, T15: Expression, (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType, <T8 as Expression>::SqlType, <T9 as Expression>::SqlType, <T10 as Expression>::SqlType, <T11 as Expression>::SqlType, <T12 as Expression>::SqlType, <T13 as Expression>::SqlType, <T14 as Expression>::SqlType, <T15 as Expression>::SqlType): TypedExpressionType,

type SqlType = (<T0 as Expression>::SqlType, <T1 as Expression>::SqlType, <T2 as Expression>::SqlType, <T3 as Expression>::SqlType, <T4 as Expression>::SqlType, <T5 as Expression>::SqlType, <T6 as Expression>::SqlType, <T7 as Expression>::SqlType, <T8 as Expression>::SqlType, <T9 as Expression>::SqlType, <T10 as Expression>::SqlType, <T11 as Expression>::SqlType, <T12 as Expression>::SqlType, <T13 as Expression>::SqlType, <T14 as Expression>::SqlType, <T15 as Expression>::SqlType)

impl<T> Expression for Box<T>

where T: Expression + ?Sized,

type SqlType = <T as Expression>::SqlType

Implementors

impl Expression for now

type SqlType = Timestamp

impl Expression for today

type SqlType = Date

impl<L, R, ST> Expression for Concat<L, R>

where L: Expression<SqlType = ST>, R: Expression<SqlType = ST>, ST: SqlType + TypedExpressionType,

type SqlType = ST

impl<Query, Value> Expression for UncheckedBind<Query, Value>

where Query: Expression,

type SqlType = <Query as Expression>::SqlType

impl<S, C> Expression for AliasedField<S, C>

where S: AliasSource, C: Column<Table = <S as AliasSource>::Target> + Expression,

type SqlType = <C as Expression>::SqlType

impl<ST, I> Expression for Many<ST, I>

where ST: TypedExpressionType,

type SqlType = ST

impl<ST, T> Expression for SqlLiteral<ST, T>

where ST: TypedExpressionType,

type SqlType = ST

impl<T> Expression for Exists<T>

where Subselect<T, Bool>: Expression,

type SqlType = Bool

impl<T, U> Expression for In<T, U>

where T: Expression, U: Expression<SqlType = <T as Expression>::SqlType>,

type SqlType = Bool

impl<T, U> Expression for NotIn<T, U>

where T: Expression, U: Expression<SqlType = <T as Expression>::SqlType>,

type SqlType = Bool

impl<W, T> Expression for CaseWhen<CaseWhenConditionsLeaf<W, T>, NoElseExpression>

where W: Expression, <W as Expression>::SqlType: BoolOrNullableBool, T: Expression, <T as Expression>::SqlType: IntoNullable, <<T as Expression>::SqlType as IntoNullable>::Nullable: SqlType + TypedExpressionType,

type SqlType = <<T as Expression>::SqlType as IntoNullable>::Nullable

impl<W, T, E> Expression for CaseWhen<CaseWhenConditionsLeaf<W, T>, ElseExpression<E>>

where W: Expression, <W as Expression>::SqlType: BoolOrNullableBool, T: Expression,

type SqlType = <T as Expression>::SqlType

impl<W, T, Whens, E> Expression for CaseWhen<CaseWhenConditionsIntermediateNode<W, T, Whens>, E>

where CaseWhen<CaseWhenConditionsLeaf<W, T>, E>: Expression, CaseWhen<Whens, E>: Expression<SqlType = <CaseWhen<CaseWhenConditionsLeaf<W, T>, E> as Expression>::SqlType>,

type SqlType = <CaseWhen<CaseWhenConditionsLeaf<W, T>, E> as Expression>::SqlType