Trait diesel::query_dsl::methods::DistinctDsl

pub trait DistinctDsl {
    type Output;

    // Required method
    fn distinct(self) -> Distinct<Self>;
}

The distinct method

This trait should not be relied on directly by most apps. Its behavior is provided by QueryDsl. However, you may need a where clause on this trait to call distinct from generic code.

Required Associated Types

type Output

The type returned by .distinct

Required Methods

fn distinct(self) -> Distinct<Self>

See the trait documentation.

Implementors

impl<'a, ST, QS, DB, GB> DistinctDsl for BoxedSelectStatement<'a, ST, QS, DB, GB>

where DB: Backend, DistinctClause: QueryFragment<DB>,

type Output = BoxedSelectStatement<'a, ST, QS, DB, GB>

impl<ST, F, S, D, W, O, LOf, G, H> DistinctDsl for SelectStatement<F, S, D, W, O, LOf, G, H>

where Self: SelectQuery<SqlType = ST>, SelectStatement<F, S, DistinctClause, W, O, LOf, G, H>: SelectQuery<SqlType = ST>,

type Output = SelectStatement<F, S, DistinctClause, W, O, LOf, G, H>

impl<T> DistinctDsl for T

where T: Table + AsQuery<Query = SelectStatement<FromClause<T>>>, T::DefaultSelection: Expression<SqlType = T::SqlType> + ValidGrouping<()>, T::SqlType: TypedExpressionType,

type Output = <SelectStatement<FromClause<T>> as DistinctDsl>::Output