Struct diesel::query_builder::Only
source · [−]pub struct Only<S> { /* private fields */ }
postgres_backend
only.Expand description
Represents a query with an ONLY
clause.
Trait Implementations
sourceimpl<S> AsQuery for Only<S> where
S: Table + Clone,
<S as QuerySource>::DefaultSelection: ValidGrouping<()> + SelectableExpression<Only<S>>,
impl<S> AsQuery for Only<S> where
S: Table + Clone,
<S as QuerySource>::DefaultSelection: ValidGrouping<()> + SelectableExpression<Only<S>>,
type SqlType = <<Only<S> as QuerySource>::DefaultSelection as Expression>::SqlType
type SqlType = <<Only<S> as QuerySource>::DefaultSelection as Expression>::SqlType
The SQL type of Self::Query
sourceimpl<S> QueryId for Only<S> where
Self: 'static,
S: QueryId,
impl<S> QueryId for Only<S> where
Self: 'static,
S: QueryId,
sourceconst HAS_STATIC_QUERY_ID: bool = <S as QueryId>::HAS_STATIC_QUERY_ID
const HAS_STATIC_QUERY_ID: bool = <S as QueryId>::HAS_STATIC_QUERY_ID
Can the SQL generated by Self
be uniquely identified by its type? Read more
sourceimpl<S> QuerySource for Only<S> where
S: Table + Clone,
<S as QuerySource>::DefaultSelection: ValidGrouping<()> + SelectableExpression<Only<S>>,
impl<S> QuerySource for Only<S> where
S: Table + Clone,
<S as QuerySource>::DefaultSelection: ValidGrouping<()> + SelectableExpression<Only<S>>,
type FromClause = Only<S>
type FromClause = Only<S>
The type returned by from_clause
type DefaultSelection = <S as QuerySource>::DefaultSelection
type DefaultSelection = <S as QuerySource>::DefaultSelection
The type returned by default_selection
sourcefn from_clause(&self) -> Self::FromClause
fn from_clause(&self) -> Self::FromClause
The actual FROM
clause of this type. This is typically only called in
QueryFragment
implementations. Read more
sourcefn default_selection(&self) -> Self::DefaultSelection
fn default_selection(&self) -> Self::DefaultSelection
The default select clause of this type, which should be used if no
select clause was explicitly specified. This should always be a tuple of
all the desired columns, not star
Read more
sourceimpl<S> Table for Only<S> where
S: Table + Clone + AsQuery,
<S as Table>::PrimaryKey: SelectableExpression<Only<S>>,
<S as Table>::AllColumns: SelectableExpression<Only<S>>,
<S as QuerySource>::DefaultSelection: ValidGrouping<()> + SelectableExpression<Only<S>>,
impl<S> Table for Only<S> where
S: Table + Clone + AsQuery,
<S as Table>::PrimaryKey: SelectableExpression<Only<S>>,
<S as Table>::AllColumns: SelectableExpression<Only<S>>,
<S as QuerySource>::DefaultSelection: ValidGrouping<()> + SelectableExpression<Only<S>>,
type PrimaryKey = <S as Table>::PrimaryKey
type PrimaryKey = <S as Table>::PrimaryKey
The type returned by primary_key
type AllColumns = <S as Table>::AllColumns
type AllColumns = <S as Table>::AllColumns
The type returned by all_columns
sourcefn primary_key(&self) -> Self::PrimaryKey
fn primary_key(&self) -> Self::PrimaryKey
Returns the primary key of this table. Read more
sourcefn all_columns() -> Self::AllColumns
fn all_columns() -> Self::AllColumns
Returns a tuple of all columns belonging to this table.
impl<S: Copy> Copy for Only<S>
impl<S, T> JoinTo<T> for Only<S> where
S: JoinTo<T>,
T: Table,
S: Table,
Auto Trait Implementations
impl<S> RefUnwindSafe for Only<S> where
S: RefUnwindSafe,
impl<S> Send for Only<S> where
S: Send,
impl<S> Sync for Only<S> where
S: Sync,
impl<S> Unpin for Only<S> where
S: Unpin,
impl<S> UnwindSafe for Only<S> where
S: UnwindSafe,
Blanket Implementations
sourceimpl<T1, T2> AppearsInFromClause<T2> for T1 where
T1: TableNotEqual<T2> + Table,
T2: Table,
impl<T1, T2> AppearsInFromClause<T2> for T1 where
T1: TableNotEqual<T2> + Table,
T2: Table,
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<Conn, DB, T> ExecuteDsl<Conn, DB> for T where
Conn: Connection<Backend = DB>,
DB: Backend,
T: QueryFragment<DB, NotSpecialized> + QueryId,
impl<Conn, DB, T> ExecuteDsl<Conn, DB> for T where
Conn: Connection<Backend = DB>,
DB: Backend,
T: QueryFragment<DB, NotSpecialized> + QueryId,
sourceimpl<T> IntoSql for T
impl<T> IntoSql for T
sourcefn into_sql<T>(self) -> AsExprOf<Self, T> where
Self: AsExpression<T> + Sized,
T: SqlType + TypedExpressionType,
fn into_sql<T>(self) -> AsExprOf<Self, T> where
Self: AsExpression<T> + Sized,
T: SqlType + TypedExpressionType,
Convert self
to an expression for Diesel’s query builder. Read more
sourcefn as_sql<'a, T>(&'a self) -> AsExprOf<&'a Self, T> where
&'a Self: AsExpression<T>,
T: SqlType + TypedExpressionType,
fn as_sql<'a, T>(&'a self) -> AsExprOf<&'a Self, T> where
&'a Self: AsExpression<T>,
T: SqlType + TypedExpressionType,
Convert &self
to an expression for Diesel’s query builder. Read more
sourceimpl<T> QueryDsl for T where
T: Table,
impl<T> QueryDsl for T where
T: Table,
sourcefn distinct(self) -> Distinct<Self> where
Self: DistinctDsl,
fn distinct(self) -> Distinct<Self> where
Self: DistinctDsl,
Adds the DISTINCT
keyword to a query. Read more
sourcefn distinct_on<Expr>(self, expr: Expr) -> DistinctOn<Self, Expr> where
Self: DistinctOnDsl<Expr>,
fn distinct_on<Expr>(self, expr: Expr) -> DistinctOn<Self, Expr> where
Self: DistinctOnDsl<Expr>,
postgres
only.Adds the DISTINCT ON
clause to a query. Read more
sourcefn select<Selection>(self, selection: Selection) -> Select<Self, Selection> where
Selection: Expression,
Self: SelectDsl<Selection>,
fn select<Selection>(self, selection: Selection) -> Select<Self, Selection> where
Selection: Expression,
Self: SelectDsl<Selection>,
Adds a SELECT
clause to the query. Read more
sourcefn count(self) -> Select<Self, CountStar> where
Self: SelectDsl<CountStar>,
fn count(self) -> Select<Self, CountStar> where
Self: SelectDsl<CountStar>,
Get the count of a query. This is equivalent to .select(count_star())
Read more
sourcefn inner_join<Rhs>(self, rhs: Rhs) -> InnerJoin<Self, Rhs> where
Self: JoinWithImplicitOnClause<Rhs, Inner>,
fn inner_join<Rhs>(self, rhs: Rhs) -> InnerJoin<Self, Rhs> where
Self: JoinWithImplicitOnClause<Rhs, Inner>,
Join two tables using a SQL INNER JOIN
. Read more
sourcefn left_outer_join<Rhs>(self, rhs: Rhs) -> LeftJoin<Self, Rhs> where
Self: JoinWithImplicitOnClause<Rhs, LeftOuter>,
fn left_outer_join<Rhs>(self, rhs: Rhs) -> LeftJoin<Self, Rhs> where
Self: JoinWithImplicitOnClause<Rhs, LeftOuter>,
Join two tables using a SQL LEFT OUTER JOIN
. Read more
sourcefn left_join<Rhs>(self, rhs: Rhs) -> LeftJoin<Self, Rhs> where
Self: JoinWithImplicitOnClause<Rhs, LeftOuter>,
fn left_join<Rhs>(self, rhs: Rhs) -> LeftJoin<Self, Rhs> where
Self: JoinWithImplicitOnClause<Rhs, LeftOuter>,
Alias for left_outer_join
. Read more
sourcefn filter<Predicate>(self, predicate: Predicate) -> Filter<Self, Predicate> where
Self: FilterDsl<Predicate>,
fn filter<Predicate>(self, predicate: Predicate) -> Filter<Self, Predicate> where
Self: FilterDsl<Predicate>,
Adds to the WHERE
clause of a query. Read more
sourcefn or_filter<Predicate>(self, predicate: Predicate) -> OrFilter<Self, Predicate> where
Self: OrFilterDsl<Predicate>,
fn or_filter<Predicate>(self, predicate: Predicate) -> OrFilter<Self, Predicate> where
Self: OrFilterDsl<Predicate>,
Adds to the WHERE
clause of a query using OR
Read more
sourcefn find<PK>(self, id: PK) -> Find<Self, PK> where
Self: FindDsl<PK>,
fn find<PK>(self, id: PK) -> Find<Self, PK> where
Self: FindDsl<PK>,
Attempts to find a single record from the given table by primary key. Read more
sourcefn order<Expr>(self, expr: Expr) -> Order<Self, Expr> where
Expr: Expression,
Self: OrderDsl<Expr>,
fn order<Expr>(self, expr: Expr) -> Order<Self, Expr> where
Expr: Expression,
Self: OrderDsl<Expr>,
Sets the order clause of a query. Read more
sourcefn order_by<Expr>(self, expr: Expr) -> Order<Self, Expr> where
Expr: Expression,
Self: OrderDsl<Expr>,
fn order_by<Expr>(self, expr: Expr) -> Order<Self, Expr> where
Expr: Expression,
Self: OrderDsl<Expr>,
Alias for order
sourcefn then_order_by<Order>(self, order: Order) -> ThenOrderBy<Self, Order> where
Self: ThenOrderDsl<Order>,
fn then_order_by<Order>(self, order: Order) -> ThenOrderBy<Self, Order> where
Self: ThenOrderDsl<Order>,
Appends to the ORDER BY
clause of this SQL query. Read more
sourcefn limit(self, limit: i64) -> Limit<Self> where
Self: LimitDsl,
fn limit(self, limit: i64) -> Limit<Self> where
Self: LimitDsl,
Sets the limit clause of the query. Read more
sourcefn offset(self, offset: i64) -> Offset<Self> where
Self: OffsetDsl,
fn offset(self, offset: i64) -> Offset<Self> where
Self: OffsetDsl,
Sets the offset clause of the query. Read more
sourcefn group_by<GB>(self, group_by: GB) -> GroupBy<Self, GB> where
GB: Expression,
Self: GroupByDsl<GB>,
fn group_by<GB>(self, group_by: GB) -> GroupBy<Self, GB> where
GB: Expression,
Self: GroupByDsl<GB>,
Sets the group by
clause of a query. Read more
sourcefn having<Predicate>(self, predicate: Predicate) -> Having<Self, Predicate> where
Self: HavingDsl<Predicate>,
fn having<Predicate>(self, predicate: Predicate) -> Having<Self, Predicate> where
Self: HavingDsl<Predicate>,
Adds to the HAVING
clause of a query. Read more
sourcefn for_update(self) -> ForUpdate<Self> where
Self: LockingDsl<ForUpdate>,
fn for_update(self) -> ForUpdate<Self> where
Self: LockingDsl<ForUpdate>,
Adds FOR UPDATE
to the end of the select statement. Read more
sourcefn for_no_key_update(self) -> ForNoKeyUpdate<Self> where
Self: LockingDsl<ForNoKeyUpdate>,
fn for_no_key_update(self) -> ForNoKeyUpdate<Self> where
Self: LockingDsl<ForNoKeyUpdate>,
Adds FOR NO KEY UPDATE
to the end of the select statement. Read more
Adds FOR SHARE
to the end of the select statement. Read more
Adds FOR KEY SHARE
to the end of the select statement. Read more
sourcefn skip_locked(self) -> SkipLocked<Self> where
Self: ModifyLockDsl<SkipLocked>,
fn skip_locked(self) -> SkipLocked<Self> where
Self: ModifyLockDsl<SkipLocked>,
Adds SKIP LOCKED
to the end of a FOR UPDATE
clause. Read more
sourcefn no_wait(self) -> NoWait<Self> where
Self: ModifyLockDsl<NoWait>,
fn no_wait(self) -> NoWait<Self> where
Self: ModifyLockDsl<NoWait>,
Adds NOWAIT
to the end of a FOR UPDATE
clause. Read more
sourcefn into_boxed<'a, DB>(self) -> IntoBoxed<'a, Self, DB> where
DB: Backend,
Self: BoxedDsl<'a, DB>,
fn into_boxed<'a, DB>(self) -> IntoBoxed<'a, Self, DB> where
DB: Backend,
Self: BoxedDsl<'a, DB>,
Boxes the pieces of a query into a single type. Read more
sourcefn single_value(self) -> SingleValue<Self> where
Self: SingleValueDsl,
fn single_value(self) -> SingleValue<Self> where
Self: SingleValueDsl,
Wraps this select statement in parenthesis, allowing it to be used as an expression. Read more
sourcefn nullable(self) -> NullableSelect<Self> where
Self: SelectNullableDsl,
fn nullable(self) -> NullableSelect<Self> where
Self: SelectNullableDsl,
Coerce the SQL type of the select clause to it’s nullable equivalent. Read more
sourceimpl<T, Conn> RunQueryDsl<Conn> for T where
T: Table,
impl<T, Conn> RunQueryDsl<Conn> for T where
T: Table,
sourcefn execute(self, conn: &mut Conn) -> QueryResult<usize> where
Conn: Connection,
Self: ExecuteDsl<Conn>,
fn execute(self, conn: &mut Conn) -> QueryResult<usize> where
Conn: Connection,
Self: ExecuteDsl<Conn>,
Executes the given command, returning the number of rows affected. Read more
sourcefn load<'query, U>(self, conn: &mut Conn) -> QueryResult<Vec<U>> where
Self: LoadQuery<'query, Conn, U>,
fn load<'query, U>(self, conn: &mut Conn) -> QueryResult<Vec<U>> where
Self: LoadQuery<'query, Conn, U>,
sourcefn load_iter<'conn, 'query: 'conn, U, B>(
self,
conn: &'conn mut Conn
) -> QueryResult<LoadIter<'conn, 'query, Self, Conn, U, B>> where
U: 'conn,
Self: LoadQuery<'query, Conn, U, B> + 'conn,
fn load_iter<'conn, 'query: 'conn, U, B>(
self,
conn: &'conn mut Conn
) -> QueryResult<LoadIter<'conn, 'query, Self, Conn, U, B>> where
U: 'conn,
Self: LoadQuery<'query, Conn, U, B> + 'conn,
sourcefn get_result<'query, U>(self, conn: &mut Conn) -> QueryResult<U> where
Self: LoadQuery<'query, Conn, U>,
fn get_result<'query, U>(self, conn: &mut Conn) -> QueryResult<U> where
Self: LoadQuery<'query, Conn, U>,
Runs the command, and returns the affected row. Read more
sourcefn get_results<'query, U>(self, conn: &mut Conn) -> QueryResult<Vec<U>> where
Self: LoadQuery<'query, Conn, U>,
fn get_results<'query, U>(self, conn: &mut Conn) -> QueryResult<Vec<U>> where
Self: LoadQuery<'query, Conn, U>,
Runs the command, returning an Vec
with the affected rows. Read more