[−][src]Trait diesel::expression::SelectableExpression

pub trait SelectableExpression<QS: ?Sized>: AppearsOnTable<QS> { }

Indicates that an expression can be selected from a source.

Columns will implement this for their table. Certain special types, like CountStar and Bound will implement this for all sources. Most compound expressions will implement this if each of their parts implement it.

Notably, columns will not implement this trait for the right side of a left join. To select a column or expression using a column from the right side of a left join, you must call .nullable() on it.

Implementations on Foreign Types

impl<T: ?Sized, QS> SelectableExpression<QS> for Box<T> where
    T: SelectableExpression<QS>,
    Box<T>: AppearsOnTable<QS>, 
[src]

impl<'a, T: ?Sized, QS> SelectableExpression<QS> for &'a T where
    T: SelectableExpression<QS>,
    &'a T: AppearsOnTable<QS>, 
[src]

impl<A, QS> SelectableExpression<QS> for (A,) where
    A: SelectableExpression<QS>,
    (A,): AppearsOnTable<QS>, 
[src]

impl<A, B, QS> SelectableExpression<QS> for (A, B) where
    A: SelectableExpression<QS>,
    B: SelectableExpression<QS>,
    (A, B): AppearsOnTable<QS>, 
[src]

impl<A, B, C, QS> SelectableExpression<QS> for (A, B, C) where
    A: SelectableExpression<QS>,
    B: SelectableExpression<QS>,
    C: SelectableExpression<QS>,
    (A, B, C): AppearsOnTable<QS>, 
[src]

impl<A, B, C, D, QS> SelectableExpression<QS> for (A, B, C, D) where
    A: SelectableExpression<QS>,
    B: SelectableExpression<QS>,
    C: SelectableExpression<QS>,
    D: SelectableExpression<QS>,
    (A, B, C, D): AppearsOnTable<QS>, 
[src]

impl<A, B, C, D, E, QS> SelectableExpression<QS> for (A, B, C, D, E) where
    A: SelectableExpression<QS>,
    B: SelectableExpression<QS>,
    C: SelectableExpression<QS>,
    D: SelectableExpression<QS>,
    E: SelectableExpression<QS>,
    (A, B, C, D, E): AppearsOnTable<QS>, 
[src]

impl<A, B, C, D, E, F, QS> SelectableExpression<QS> for (A, B, C, D, E, F) where
    A: SelectableExpression<QS>,
    B: SelectableExpression<QS>,
    C: SelectableExpression<QS>,
    D: SelectableExpression<QS>,
    E: SelectableExpression<QS>,
    F: SelectableExpression<QS>,
    (A, B, C, D, E, F): AppearsOnTable<QS>, 
[src]

impl<A, B, C, D, E, F, G, QS> SelectableExpression<QS> for (A, B, C, D, E, F, G) where
    A: SelectableExpression<QS>,
    B: SelectableExpression<QS>,
    C: SelectableExpression<QS>,
    D: SelectableExpression<QS>,
    E: SelectableExpression<QS>,
    F: SelectableExpression<QS>,
    G: SelectableExpression<QS>,
    (A, B, C, D, E, F, G): AppearsOnTable<QS>, 
[src]

impl<A, B, C, D, E, F, G, H, QS> SelectableExpression<QS> for (A, B, C, D, E, F, G, H) where
    A: SelectableExpression<QS>,
    B: SelectableExpression<QS>,
    C: SelectableExpression<QS>,
    D: SelectableExpression<QS>,
    E: SelectableExpression<QS>,
    F: SelectableExpression<QS>,
    G: SelectableExpression<QS>,
    H: SelectableExpression<QS>,
    (A, B, C, D, E, F, G, H): AppearsOnTable<QS>, 
[src]

impl<A, B, C, D, E, F, G, H, I, QS> SelectableExpression<QS> for (A, B, C, D, E, F, G, H, I) where
    A: SelectableExpression<QS>,
    B: SelectableExpression<QS>,
    C: SelectableExpression<QS>,
    D: SelectableExpression<QS>,
    E: SelectableExpression<QS>,
    F: SelectableExpression<QS>,
    G: SelectableExpression<QS>,
    H: SelectableExpression<QS>,
    I: SelectableExpression<QS>,
    (A, B, C, D, E, F, G, H, I): AppearsOnTable<QS>, 
[src]

impl<A, B, C, D, E, F, G, H, I, J, QS> SelectableExpression<QS> for (A, B, C, D, E, F, G, H, I, J) where
    A: SelectableExpression<QS>,
    B: SelectableExpression<QS>,
    C: SelectableExpression<QS>,
    D: SelectableExpression<QS>,
    E: SelectableExpression<QS>,
    F: SelectableExpression<QS>,
    G: SelectableExpression<QS>,
    H: SelectableExpression<QS>,
    I: SelectableExpression<QS>,
    J: SelectableExpression<QS>,
    (A, B, C, D, E, F, G, H, I, J): AppearsOnTable<QS>, 
[src]

impl<A, B, C, D, E, F, G, H, I, J, K, QS> SelectableExpression<QS> for (A, B, C, D, E, F, G, H, I, J, K) where
    A: SelectableExpression<QS>,
    B: SelectableExpression<QS>,
    C: SelectableExpression<QS>,
    D: SelectableExpression<QS>,
    E: SelectableExpression<QS>,
    F: SelectableExpression<QS>,
    G: SelectableExpression<QS>,
    H: SelectableExpression<QS>,
    I: SelectableExpression<QS>,
    J: SelectableExpression<QS>,
    K: SelectableExpression<QS>,
    (A, B, C, D, E, F, G, H, I, J, K): AppearsOnTable<QS>, 
[src]

impl<A, B, C, D, E, F, G, H, I, J, K, L, QS> SelectableExpression<QS> for (A, B, C, D, E, F, G, H, I, J, K, L) where
    A: SelectableExpression<QS>,
    B: SelectableExpression<QS>,
    C: SelectableExpression<QS>,
    D: SelectableExpression<QS>,
    E: SelectableExpression<QS>,
    F: SelectableExpression<QS>,
    G: SelectableExpression<QS>,
    H: SelectableExpression<QS>,
    I: SelectableExpression<QS>,
    J: SelectableExpression<QS>,
    K: SelectableExpression<QS>,
    L: SelectableExpression<QS>,
    (A, B, C, D, E, F, G, H, I, J, K, L): AppearsOnTable<QS>, 
[src]

impl<A, B, C, D, E, F, G, H, I, J, K, L, M, QS> SelectableExpression<QS> for (A, B, C, D, E, F, G, H, I, J, K, L, M) where
    A: SelectableExpression<QS>,
    B: SelectableExpression<QS>,
    C: SelectableExpression<QS>,
    D: SelectableExpression<QS>,
    E: SelectableExpression<QS>,
    F: SelectableExpression<QS>,
    G: SelectableExpression<QS>,
    H: SelectableExpression<QS>,
    I: SelectableExpression<QS>,
    J: SelectableExpression<QS>,
    K: SelectableExpression<QS>,
    L: SelectableExpression<QS>,
    M: SelectableExpression<QS>,
    (A, B, C, D, E, F, G, H, I, J, K, L, M): AppearsOnTable<QS>, 
[src]

impl<A, B, C, D, E, F, G, H, I, J, K, L, M, N, QS> SelectableExpression<QS> for (A, B, C, D, E, F, G, H, I, J, K, L, M, N) where
    A: SelectableExpression<QS>,
    B: SelectableExpression<QS>,
    C: SelectableExpression<QS>,
    D: SelectableExpression<QS>,
    E: SelectableExpression<QS>,
    F: SelectableExpression<QS>,
    G: SelectableExpression<QS>,
    H: SelectableExpression<QS>,
    I: SelectableExpression<QS>,
    J: SelectableExpression<QS>,
    K: SelectableExpression<QS>,
    L: SelectableExpression<QS>,
    M: SelectableExpression<QS>,
    N: SelectableExpression<QS>,
    (A, B, C, D, E, F, G, H, I, J, K, L, M, N): AppearsOnTable<QS>, 
[src]

impl<A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, QS> SelectableExpression<QS> for (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O) where
    A: SelectableExpression<QS>,
    B: SelectableExpression<QS>,
    C: SelectableExpression<QS>,
    D: SelectableExpression<QS>,
    E: SelectableExpression<QS>,
    F: SelectableExpression<QS>,
    G: SelectableExpression<QS>,
    H: SelectableExpression<QS>,
    I: SelectableExpression<QS>,
    J: SelectableExpression<QS>,
    K: SelectableExpression<QS>,
    L: SelectableExpression<QS>,
    M: SelectableExpression<QS>,
    N: SelectableExpression<QS>,
    O: SelectableExpression<QS>,
    (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O): AppearsOnTable<QS>, 
[src]

impl<A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, QS> SelectableExpression<QS> for (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P) where
    A: SelectableExpression<QS>,
    B: SelectableExpression<QS>,
    C: SelectableExpression<QS>,
    D: SelectableExpression<QS>,
    E: SelectableExpression<QS>,
    F: SelectableExpression<QS>,
    G: SelectableExpression<QS>,
    H: SelectableExpression<QS>,
    I: SelectableExpression<QS>,
    J: SelectableExpression<QS>,
    K: SelectableExpression<QS>,
    L: SelectableExpression<QS>,
    M: SelectableExpression<QS>,
    N: SelectableExpression<QS>,
    O: SelectableExpression<QS>,
    P: SelectableExpression<QS>,
    (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P): AppearsOnTable<QS>, 
[src]

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Implementors

impl<QS> SelectableExpression<QS> for now where
    now: AppearsOnTable<QS>, 
[src]

impl<QS, Query, Value> SelectableExpression<QS> for UncheckedBind<Query, Value> where
    Self: AppearsOnTable<QS>, 
[src]

impl<QS, ST, T> SelectableExpression<QS> for SqlLiteral<ST, T>
[src]

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