Struct diesel::pg::DistinctOnClause
source · pub struct DistinctOnClause<T>(/* private fields */);
Available on crate feature
postgres_backend
only.Expand description
Represents DISTINCT ON (...)
Trait Implementations§
source§impl<T: Clone> Clone for DistinctOnClause<T>
impl<T: Clone> Clone for DistinctOnClause<T>
source§fn clone(&self) -> DistinctOnClause<T>
fn clone(&self) -> DistinctOnClause<T>
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl<T: Debug> Debug for DistinctOnClause<T>
impl<T: Debug> Debug for DistinctOnClause<T>
source§impl<T> QueryFragment<Pg> for DistinctOnClause<T>where
T: QueryFragment<Pg>,
impl<T> QueryFragment<Pg> for DistinctOnClause<T>where
T: QueryFragment<Pg>,
source§fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, Pg>) -> QueryResult<()>
fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, Pg>) -> QueryResult<()>
Walk over this
QueryFragment
for all passes. Read moresource§fn to_sql(&self, out: &mut DB::QueryBuilder, backend: &DB) -> QueryResult<()>
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 moresource§fn collect_binds<'b>(
&'b self,
out: &mut DB::BindCollector<'b>,
metadata_lookup: &mut DB::MetadataLookup,
backend: &'b DB,
) -> QueryResult<()>
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>
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§impl<T: QueryId> QueryId for DistinctOnClause<T>
impl<T: QueryId> QueryId for DistinctOnClause<T>
impl<T: Copy> Copy for DistinctOnClause<T>
Auto Trait Implementations§
impl<T> Freeze for DistinctOnClause<T>where
T: Freeze,
impl<T> RefUnwindSafe for DistinctOnClause<T>where
T: RefUnwindSafe,
impl<T> Send for DistinctOnClause<T>where
T: Send,
impl<T> Sync for DistinctOnClause<T>where
T: Sync,
impl<T> Unpin for DistinctOnClause<T>where
T: Unpin,
impl<T> UnwindSafe for DistinctOnClause<T>where
T: UnwindSafe,
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
🔬This is a nightly-only experimental API. (
clone_to_uninit
)