Trait diesel::query_builder::AsQuery

pub trait AsQuery {
    type SqlType;
    type Query: Query<SqlType = Self::SqlType>;

    fn as_query(self) -> Self::Query;
}

Types that can be converted into a complete, typed SQL query.

This is used internally to automatically add the right select clause when none is specified, or to automatically add RETURNING * in certain contexts.

A type which implements this trait is guaranteed to be valid for execution.

Required Associated Types

type SqlType

The SQL type of Self::Query

type Query: Query<SqlType = Self::SqlType>

What kind of query does this type represent?

Required Methods

fn as_query(self) -> Self::Query

Converts a type which semantically represents a SQL query into the actual query being executed. See the trait level docs for more.

Implementors

impl<S> AsQuery for Alias<S>where
    S: AliasSource,
    S::Target: AsQuery,
    Self: QuerySource,
    <Self as QuerySource>::DefaultSelection: ValidGrouping<()>,

type SqlType = <<Alias<S> as QuerySource>::DefaultSelection as Expression>::SqlType

type Query = SelectStatement<FromClause<Alias<S>>, DefaultSelectClause<FromClause<Alias<S>>>, NoDistinctClause, NoWhereClause, NoOrderClause, LimitOffsetClause<NoLimitClause, NoOffsetClause>, NoGroupByClause, NoHavingClause, NoLockingClause>

impl<T, U> AsQuery for DeleteStatement<T, U, NoReturningClause>where
    T: Table,
    T::AllColumns: SelectableExpression<T>,
    DeleteStatement<T, U, ReturningClause<T::AllColumns>>: Query,

type SqlType = <<DeleteStatement<T, U, NoReturningClause> as AsQuery>::Query as Query>::SqlType

type Query = DeleteStatement<T, U, ReturningClause<<T as Table>::AllColumns>>

impl<T, U, Op> AsQuery for InsertStatement<T, U, Op, NoReturningClause>where
    T: Table,
    InsertStatement<T, U, Op, ReturningClause<T::AllColumns>>: Query,

type SqlType = <<InsertStatement<T, U, Op, NoReturningClause> as AsQuery>::Query as Query>::SqlType

type Query = InsertStatement<T, U, Op, ReturningClause<<T as Table>::AllColumns>>

impl<T, U, V> AsQuery for UpdateStatement<T, U, V, NoReturningClause>where
    T: Table,
    UpdateStatement<T, U, V, ReturningClause<T::AllColumns>>: Query,
    T::AllColumns: ValidGrouping<()>,
    <T::AllColumns as ValidGrouping<()>>::IsAggregate: MixedAggregates<No, Output = No>,

type SqlType = <<UpdateStatement<T, U, V, NoReturningClause> as AsQuery>::Query as Query>::SqlType

type Query = UpdateStatement<T, U, V, ReturningClause<<T as Table>::AllColumns>>

impl<T: Query> AsQuery for T

type SqlType = <T as Query>::SqlType

type Query = T