Trait diesel::prelude::SelectDsl [−] [src]

pub trait SelectDsl<Selection: Expression> {
    type Output: Query<SqlType=Selection::SqlType>;
    fn select(self, selection: Selection) -> Self::Output;
}

Sets the select clause of a query. If there was already a select clause, it will be overridden. The expression passed to select must actually be valid for the query (only contains columns from the target table, doesn't mix aggregate + non-aggregate expressions, etc).

Associated Types

`type Output: Query<SqlType=Selection::SqlType>`

Required Methods

`fn select(self, selection: Selection) -> Self::Output`

Implementors

impl<T, Selection> SelectDsl<Selection> for T where Selection: Expression, T: QuerySource + AsQuery, T::Query: SelectDsl<Selection>