Trait 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 + ?Sized> Expression for &'a T

type SqlType = <T as Expression>::SqlType

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

where (T0::SqlType,): TypedExpressionType,

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

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

where (T0::SqlType, T1::SqlType): TypedExpressionType,

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

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

where (T0::SqlType, T1::SqlType, T2::SqlType): TypedExpressionType,

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

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

where (T0::SqlType, T1::SqlType, T2::SqlType, T3::SqlType): TypedExpressionType,

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

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

where (T0::SqlType, T1::SqlType, T2::SqlType, T3::SqlType, T4::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: Expression, T1: Expression, T2: Expression, T3: Expression, T4: Expression, T5: Expression> Expression for (T0, T1, T2, T3, T4, T5)

where (T0::SqlType, T1::SqlType, T2::SqlType, T3::SqlType, T4::SqlType, T5::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: Expression, T1: Expression, T2: Expression, T3: Expression, T4: Expression, T5: Expression, T6: Expression> Expression for (T0, T1, T2, T3, T4, T5, T6)

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

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

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

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

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

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

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

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

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

where (T0::SqlType, T1::SqlType, T2::SqlType, T3::SqlType, T4::SqlType, T5::SqlType, T6::SqlType, T7::SqlType, T8::SqlType, T9::SqlType, T10::SqlType, T11::SqlType, T12::SqlType, T13::SqlType, T14::SqlType, T15::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 + ?Sized> Expression for Box<T>

type SqlType = <T as Expression>::SqlType

Implementors

impl Expression for now

type SqlType = Timestamp

impl Expression for today

type SqlType = Date

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::Target> + Expression,

type SqlType = <C as Expression>::SqlType

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

where ST: TypedExpressionType,

type SqlType = ST

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