diesel::dsl::frame

Struct CurrentRow

pub struct CurrentRow;

Expand description

A CURRENT ROW frame bound

For the RANGE and GROUP frame mode this bound specifies that the current frame starts with the current rows first peer groups row. A peer group is defined as a set of rows with an equivalent ORDER BY ordering.

For the ROWS mode CURRENT ROW simply means the current row

This option can be used as frame start and end

Trait Implementations§

Source §

impl Clone for CurrentRow

Source §

fn clone(&self) -> CurrentRow

Returns a duplicate of the value. Read more

1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

Source §

impl Debug for CurrentRow

Source §

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Source §

impl<DB> QueryFragment<DB> for CurrentRow
where DB: Backend,

Source §

fn walk_ast<'b>(&'b self, pass: AstPass<'_, 'b, DB>) -> QueryResult<()>

Walk over this QueryFragment for all passes. Read more

Source §

fn to_sql(&self, out: &mut DB::QueryBuilder, backend: &DB) -> QueryResult<()>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Converts this QueryFragment to its SQL representation. Read more

Source §

fn collect_binds<'b>( &'b self, out: &mut DB::BindCollector<'b>, metadata_lookup: &mut DB::MetadataLookup, backend: &'b DB, ) -> QueryResult<()>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Serializes all bind parameters in this query. Read more

Source §

fn is_safe_to_cache_prepared(&self, backend: &DB) -> QueryResult<bool>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Is this query safe to store in the prepared statement cache? Read more

Source §

fn is_noop(&self, backend: &DB) -> QueryResult<bool>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Does walking this AST have any effect?

Source §

impl QueryId for CurrentRow

Source §

const HAS_STATIC_QUERY_ID: bool = true

Can the SQL generated by Self be uniquely identified by its type? Read more

Source §

type QueryId = CurrentRow

A type which uniquely represents Self in a SQL query. Read more

Source §

fn query_id() -> Option<TypeId>

Returns the type id of Self::QueryId if Self::HAS_STATIC_QUERY_ID. Returns None otherwise. Read more

Source §

impl Copy for CurrentRow

Source §

impl FrameClauseEndBound for CurrentRow

Source §

impl FrameClauseStartBound for CurrentRow

Auto Trait Implementations§

§

impl UnwindSafe for CurrentRow

Blanket Implementations§

Source §

impl<T> AggregateExpressionMethods for T

Source §

fn aggregate_distinct(self) -> AggregateDistinct<Self>
where Self: DistinctDsl,

DISTINCT modifier for aggregate functions Read more

Source §

fn aggregate_all(self) -> AggregateAll<Self>
where Self: AllDsl,

ALL modifier for aggregate functions Read more

Source §

fn aggregate_filter(self, f: P) -> AggregateFilter<Self, P>
where P: AsExpression<Bool>, Self: FilterDsl<P::Expression>,

Add an aggregate function filter Read more

Source §

fn aggregate_order<O>(self, o: O) -> AggregateOrder<Self, O>
where Self: OrderAggregateDsl<O>,

Add an aggregate function order Read more

Source §

impl<T> Any for T
where T: 'static + ?Sized,

Source §

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

Source §

impl<T> Borrow<T> for T
where T: ?Sized,

Source §

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

Source §

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source §

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

Source §

impl<T> CloneToUninit for T
where T: Clone,

Source §

unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

Source §

impl<T> Downcast for T
where T: Any,

Source §

fn into_any(self: Box<T>) -> Box<dyn Any>

Converts Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>, which can then be downcast into Box<dyn ConcreteType> where ConcreteType implements Trait.

Source §

fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Converts Rc<Trait> (where Trait: Downcast) to Rc<Any>, which can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.

Source §

fn as_any(&self) -> &(dyn Any + 'static)

Converts &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.

Source §

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Converts &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.

Source §

impl<T> DowncastSend for T
where T: Any + Send,

Source §

fn into_any_send(self: Box<T>) -> Box<dyn Any + Send>

Converts Box<Trait> (where Trait: DowncastSend) to Box<dyn Any + Send>, which can then be downcast into Box<ConcreteType> where ConcreteType implements Trait.

Source §

impl<T> DowncastSync for T
where T: Any + Send + Sync,

Source §

fn into_any_sync(self: Box<T>) -> Box<dyn Any + Sync + Send>

Converts Box<Trait> (where Trait: DowncastSync) to Box<dyn Any + Send + Sync>, which can then be downcast into Box<ConcreteType> where ConcreteType implements Trait.

Source §

fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send>

Converts Arc<Trait> (where Trait: DowncastSync) to Arc<Any>, which can then be downcast into Arc<ConcreteType> where ConcreteType implements Trait.

Source §

impl<Conn, DB, T> ExecuteDsl<Conn, DB> for T
where Conn: Connection<Backend = DB>, DB: Backend, T: QueryFragment<DB> + QueryId,

Source §

fn execute(query: T, conn: &mut Conn) -> Result<usize, Error>

Execute this command

Source §

impl<T> From<T> for T

Source §

fn from(t: T) -> T

Returns the argument unchanged.

Source §

impl<T, U> Into for T
where U: From<T>,

Source §

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Source §

impl<T> IntoSql for T

Source §

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

Source §

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

Source §

impl<T, DB> QueryFragmentForCachedStatement<DB> for T
where DB: Backend, <DB as Backend>::QueryBuilder: Default, T: QueryFragment<DB>,

Source §

fn construct_sql(&self, backend: &DB) -> Result<String, Error>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Convert the query fragment into a SQL string for the given backend

Source §

fn is_safe_to_cache_prepared(&self, backend: &DB) -> Result<bool, Error>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Check whether it’s safe to cache the query

Source §

impl<T> ToOwned for T
where T: Clone,

Source §

type Owned = T

The resulting type after obtaining ownership.

Source §

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

Source §

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

Source §

impl<T, U> TryFrom for T
where U: Into<T>,

Source §

type Error = Infallible

The type returned in the event of a conversion error.

Source §

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

Source §

impl<T, U> TryInto for T
where U: TryFrom<T>,

Source §

type Error = >::Error

The type returned in the event of a conversion error.

Source §

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Source §

impl<T> WindowExpressionMethods for T

Source §

fn over(self) -> Over<Self>
where Self: OverDsl,

Turn a function call into a window function call Read more

Source §

fn window_filter(self, f: P) -> WindowFilter<Self, P>
where P: AsExpression<Bool>, Self: FilterDsl<P::Expression>,

Add a filter to the current window function Read more

Source §

fn partition_by<E>(self, expr: E) -> PartitionBy<Self, E>
where Self: PartitionByDsl<E>,

Add a partition clause to the current window function Read more

Source §

fn window_order<E>(self, expr: E) -> WindowOrder<Self, E>
where Self: OrderWindowDsl<E>,

Add a order clause to the current window function Read more

Source §

fn frame_by<E>(self, expr: E) -> FrameBy<Self, E>
where Self: FrameDsl<E>,

Add a frame clause to the current window function Read more

Source §

CurrentRow

Struct CurrentRow Copy item path

Trait Implementations§

impl Clone for CurrentRow

fn clone(&self) -> CurrentRow

fn clone_from(&mut self, source: &Self)

impl Debug for CurrentRow

fn fmt(&self, f: &mut Formatter<'_>) -> Result

impl<DB> QueryFragment<DB> for CurrentRowwhere DB: Backend,

fn walk_ast<'b>(&'b self, pass: AstPass<'_, 'b, DB>) -> QueryResult<()>

fn to_sql(&self, out: &mut DB::QueryBuilder, backend: &DB) -> QueryResult<()>

fn collect_binds<'b>( &'b self, out: &mut DB::BindCollector<'b>, metadata_lookup: &mut DB::MetadataLookup, backend: &'b DB, ) -> QueryResult<()>

fn is_safe_to_cache_prepared(&self, backend: &DB) -> QueryResult<bool>

fn is_noop(&self, backend: &DB) -> QueryResult<bool>

impl QueryId for CurrentRow

const HAS_STATIC_QUERY_ID: bool = true

type QueryId = CurrentRow

fn query_id() -> Option<TypeId>

impl Copy for CurrentRow

impl FrameClauseEndBound for CurrentRow

impl FrameClauseStartBound for CurrentRow

Auto Trait Implementations§

impl Freeze for CurrentRow

impl RefUnwindSafe for CurrentRow

impl Send for CurrentRow

impl Sync for CurrentRow

impl Unpin for CurrentRow

impl UnwindSafe for CurrentRow

Blanket Implementations§

impl<T> AggregateExpressionMethods for T

fn aggregate_distinct(self) -> AggregateDistinct<Self>where Self: DistinctDsl,

fn aggregate_all(self) -> AggregateAll<Self>where Self: AllDsl,

fn aggregate_filter<P>(self, f: P) -> AggregateFilter<Self, P>where P: AsExpression<Bool>, Self: FilterDsl<P::Expression>,

fn aggregate_order<O>(self, o: O) -> AggregateOrder<Self, O>where Self: OrderAggregateDsl<O>,

impl<T> Any for Twhere T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for Twhere T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> CloneToUninit for Twhere T: Clone,

unsafe fn clone_to_uninit(&self, dest: *mut u8)

impl<T> Downcast for Twhere T: Any,

fn into_any(self: Box<T>) -> Box<dyn Any>

fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

fn as_any(&self) -> &(dyn Any + 'static)

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

impl<T> DowncastSend for Twhere T: Any + Send,

fn into_any_send(self: Box<T>) -> Box<dyn Any + Send>

impl<T> DowncastSync for Twhere T: Any + Send + Sync,

fn into_any_sync(self: Box<T>) -> Box<dyn Any + Sync + Send>

fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send>

impl<Conn, DB, T> ExecuteDsl<Conn, DB> for Twhere Conn: Connection<Backend = DB>, DB: Backend, T: QueryFragment<DB> + QueryId,

fn execute(query: T, conn: &mut Conn) -> Result<usize, Error>

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for Twhere U: From<T>,

fn into(self) -> U

impl<T> IntoSql for T

fn into_sql<T>(self) -> AsExprOf<Self, T>where Self: AsExpression<T> + Sized, T: SqlType + TypedExpressionType,

fn as_sql<'a, T>(&'a self) -> AsExprOf<&'a Self, T>where &'a Self: AsExpression<T>, T: SqlType + TypedExpressionType,

impl<T, DB> QueryFragmentForCachedStatement<DB> for Twhere DB: Backend, <DB as Backend>::QueryBuilder: Default, T: QueryFragment<DB>,

fn construct_sql(&self, backend: &DB) -> Result<String, Error>

fn is_safe_to_cache_prepared(&self, backend: &DB) -> Result<bool, Error>

impl<T> ToOwned for Twhere T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<T> WindowExpressionMethods for T

fn over(self) -> Over<Self>where Self: OverDsl,

fn window_filter<P>(self, f: P) -> WindowFilter<Self, P>where P: AsExpression<Bool>, Self: FilterDsl<P::Expression>,

fn partition_by<E>(self, expr: E) -> PartitionBy<Self, E>where Self: PartitionByDsl<E>,

fn window_order<E>(self, expr: E) -> WindowOrder<Self, E>where Self: OrderWindowDsl<E>,

fn frame_by<E>(self, expr: E) -> FrameBy<Self, E>where Self: FrameDsl<E>,

Struct CurrentRow

impl<DB> QueryFragment<DB> for CurrentRow
where DB: Backend,

fn aggregate_distinct(self) -> AggregateDistinct<Self>
where Self: DistinctDsl,

fn aggregate_all(self) -> AggregateAll<Self>
where Self: AllDsl,

fn aggregate_filter<P>(self, f: P) -> AggregateFilter<Self, P>
where P: AsExpression<Bool>, Self: FilterDsl<P::Expression>,

fn aggregate_order<O>(self, o: O) -> AggregateOrder<Self, O>
where Self: OrderAggregateDsl<O>,

impl<T> Any for T
where T: 'static + ?Sized,

impl<T> Borrow<T> for T
where T: ?Sized,

impl<T> BorrowMut<T> for T
where T: ?Sized,

impl<T> CloneToUninit for T
where T: Clone,

impl<T> Downcast for T
where T: Any,

impl<T> DowncastSend for T
where T: Any + Send,

impl<T> DowncastSync for T
where T: Any + Send + Sync,

impl<Conn, DB, T> ExecuteDsl<Conn, DB> for T
where Conn: Connection<Backend = DB>, DB: Backend, T: QueryFragment<DB> + QueryId,

impl<T, U> Into<U> for T
where U: From<T>,

fn into_sql<T>(self) -> AsExprOf<Self, T>
where Self: AsExpression<T> + Sized, T: SqlType + TypedExpressionType,

fn as_sql<'a, T>(&'a self) -> AsExprOf<&'a Self, T>
where &'a Self: AsExpression<T>, T: SqlType + TypedExpressionType,

impl<T, DB> QueryFragmentForCachedStatement<DB> for T
where DB: Backend, <DB as Backend>::QueryBuilder: Default, T: QueryFragment<DB>,

impl<T> ToOwned for T
where T: Clone,

impl<T, U> TryFrom<U> for T
where U: Into<T>,

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

fn over(self) -> Over<Self>
where Self: OverDsl,

fn window_filter<P>(self, f: P) -> WindowFilter<Self, P>
where P: AsExpression<Bool>, Self: FilterDsl<P::Expression>,

fn partition_by<E>(self, expr: E) -> PartitionBy<Self, E>
where Self: PartitionByDsl<E>,

fn window_order<E>(self, expr: E) -> WindowOrder<Self, E>
where Self: OrderWindowDsl<E>,

fn frame_by<E>(self, expr: E) -> FrameBy<Self, E>
where Self: FrameDsl<E>,

impl<T> ErasedDestructor for T
where T: 'static,