Struct diesel::query_builder::Only
source · pub struct Only<S> { /* private fields */ }Available on crate feature
postgres_backend only.Expand description
Represents a query with an ONLY clause.
Trait Implementations§
source§impl<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§type Query = SelectStatement<FromClause<Only<S>>, DefaultSelectClause<FromClause<Only<S>>>, NoDistinctClause, NoWhereClause, NoOrderClause, LimitOffsetClause<NoLimitClause, NoOffsetClause>, NoGroupByClause, NoHavingClause, NoLockingClause>
type Query = SelectStatement<FromClause<Only<S>>, DefaultSelectClause<FromClause<Only<S>>>, NoDistinctClause, NoWhereClause, NoOrderClause, LimitOffsetClause<NoLimitClause, NoOffsetClause>, NoGroupByClause, NoHavingClause, NoLockingClause>
What kind of query does this type represent?
source§impl<S> QueryId for Only<S>where
Self: 'static,
S: QueryId,
impl<S> QueryId for Only<S>where Self: 'static, S: QueryId,
source§const 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 moresource§impl<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_selectionsource§fn 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.source§fn 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
starsource§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>>,
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_columnssource§fn primary_key(&self) -> Self::PrimaryKey
fn primary_key(&self) -> Self::PrimaryKey
Returns the primary key of this table. Read more
source§fn 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> + Table, T: 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§
source§impl<T1, T2> AppearsInFromClause<T2> for T1where
T1: TableNotEqual<T2> + Table,
T2: Table,
impl<T1, T2> AppearsInFromClause<T2> for T1where T1: TableNotEqual<T2> + Table, T2: Table,
source§impl<Conn, DB, T> ExecuteDsl<Conn, DB> for Twhere
Conn: Connection<Backend = DB>,
DB: Backend,
T: QueryFragment<DB, NotSpecialized> + QueryId,
impl<Conn, DB, T> ExecuteDsl<Conn, DB> for Twhere Conn: Connection<Backend = DB>, DB: Backend, T: QueryFragment<DB, NotSpecialized> + QueryId,
source§impl<T> IntoSql for T
impl<T> IntoSql for T
source§fn 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 moresource§fn 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 moresource§impl<T> QueryDsl for Twhere
T: Table,
impl<T> QueryDsl for Twhere T: Table,
source§fn distinct(self) -> Distinct<Self>where
Self: DistinctDsl,
fn distinct(self) -> Distinct<Self>where Self: DistinctDsl,
Adds the
DISTINCT keyword to a query. Read moresource§fn 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>,
Available on crate feature
postgres only.Adds the
DISTINCT ON clause to a query. Read moresource§fn 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 moresource§fn 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 moresource§fn 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 moresource§fn 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 moresource§fn 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.source§fn 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 moresource§fn 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>,
source§fn 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
source§fn 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
source§fn 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
ordersource§fn 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 moresource§fn 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
source§fn 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
source§fn 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 moresource§fn 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 moresource§fn 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 moresource§fn 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 moreAdds
FOR SHARE to the end of the select statement. Read moreAdds
FOR KEY SHARE to the end of the select statement. Read moresource§fn skip_locked(self) -> SkipLocked<Self>where
Self: ModifyLockDsl<SkipLocked>,
fn skip_locked(self) -> SkipLocked<Self>where Self: ModifyLockDsl<SkipLocked>,
source§fn no_wait(self) -> NoWait<Self>where
Self: ModifyLockDsl<NoWait>,
fn no_wait(self) -> NoWait<Self>where Self: ModifyLockDsl<NoWait>,
source§fn 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
source§fn 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
source§fn 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
source§impl<T, Conn> RunQueryDsl<Conn> for Twhere
T: Table,
impl<T, Conn> RunQueryDsl<Conn> for Twhere T: Table,
source§fn 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
source§fn 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>,
source§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,
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,
source§fn 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
source§fn 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