pub struct star;
Expand description
Represents table_name.*
, which is sometimes needed for
efficient count queries. It cannot be used in place of
all_columns
, and has a SqlType
of ()
to prevent it
being used that way
Trait Implementations§
source§impl Expression for star
impl Expression for star
source§type SqlType = NotSelectable
type SqlType = NotSelectable
The type that this expression represents in SQL
source§impl<DB: Backend> QueryFragment<DB> for star
impl<DB: Backend> QueryFragment<DB> for star
source§fn walk_ast<'b>(
&'b self,
__diesel_internal_out: AstPass<'_, 'b, DB>,
) -> QueryResult<()>
fn walk_ast<'b>( &'b self, __diesel_internal_out: AstPass<'_, 'b, DB>, ) -> QueryResult<()>
Walk over this
QueryFragment
for all passes. Read moresource§fn to_sql(
&self,
out: &mut <DB as Backend>::QueryBuilder,
backend: &DB,
) -> Result<(), Error>
fn to_sql( &self, out: &mut <DB as Backend>::QueryBuilder, backend: &DB, ) -> Result<(), Error>
Converts this
QueryFragment
to its SQL representation. Read moresource§fn collect_binds<'b>(
&'b self,
out: &mut <DB as HasBindCollector<'b>>::BindCollector,
metadata_lookup: &mut <DB as TypeMetadata>::MetadataLookup,
backend: &'b DB,
) -> Result<(), Error>
fn collect_binds<'b>( &'b self, out: &mut <DB as HasBindCollector<'b>>::BindCollector, metadata_lookup: &mut <DB as TypeMetadata>::MetadataLookup, backend: &'b DB, ) -> Result<(), Error>
Serializes all bind parameters in this query. Read more
source§impl QueryId for star
impl QueryId for star
source§const HAS_STATIC_QUERY_ID: bool = true
const HAS_STATIC_QUERY_ID: bool = true
Can the SQL generated by
Self
be uniquely identified by its type? Read moresource§impl<__GB> ValidGrouping<__GB> for starwhere
(id, plant_id, x, y, size_x, size_y, rotation, add_date, remove_date, seed_id, is_area, notes, created_at, modified_at, created_by, modified_by, layer_id): ValidGrouping<__GB>,
impl<__GB> ValidGrouping<__GB> for starwhere
(id, plant_id, x, y, size_x, size_y, rotation, add_date, remove_date, seed_id, is_area, notes, created_at, modified_at, created_by, modified_by, layer_id): ValidGrouping<__GB>,
source§type IsAggregate = <(id, plant_id, x, y, size_x, size_y, rotation, add_date, remove_date, seed_id, is_area, notes, created_at, modified_at, created_by, modified_by, layer_id) as ValidGrouping<__GB>>::IsAggregate
type IsAggregate = <(id, plant_id, x, y, size_x, size_y, rotation, add_date, remove_date, seed_id, is_area, notes, created_at, modified_at, created_by, modified_by, layer_id) as ValidGrouping<__GB>>::IsAggregate
Is this expression aggregate? Read more
impl AppearsOnTable<table> for star
impl Copy for star
impl SelectableExpression<table> for star
Auto Trait Implementations§
impl Freeze for star
impl RefUnwindSafe for star
impl Send for star
impl Sync for star
impl Unpin for star
impl UnwindSafe for star
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
)source§impl<Conn, DB, T> ExecuteDsl<Conn, DB> for T
impl<Conn, DB, T> ExecuteDsl<Conn, DB> for T
source§fn execute<'conn, 'query>(
query: T,
conn: &'conn mut Conn,
) -> <Conn as AsyncConnection>::ExecuteFuture<'conn, 'query>where
T: 'query,
fn execute<'conn, 'query>(
query: T,
conn: &'conn mut Conn,
) -> <Conn as AsyncConnection>::ExecuteFuture<'conn, 'query>where
T: 'query,
Execute this command
source§impl<Conn, DB, T> ExecuteDsl<Conn, DB> for T
impl<Conn, DB, T> ExecuteDsl<Conn, DB> for T
source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§impl<T> IntoSql for T
impl<T> IntoSql for T
source§fn into_sql<T>(self) -> Self::Expression
fn into_sql<T>(self) -> Self::Expression
Convert
self
to an expression for Diesel’s query builder. Read moresource§fn as_sql<'a, T>(&'a self) -> <&'a Self as AsExpression<T>>::Expression
fn as_sql<'a, T>(&'a self) -> <&'a Self as AsExpression<T>>::Expression
Convert
&self
to an expression for Diesel’s query builder. Read moresource§impl<T> NullableExpressionMethods for Twhere
T: Expression,
impl<T> NullableExpressionMethods for Twhere
T: Expression,
source§fn nullable(self) -> Nullable<Self>
fn nullable(self) -> Nullable<Self>
Converts this potentially non-null expression into one which is treated
as nullable. This method has no impact on the generated SQL, and is only
used to allow certain comparisons that would otherwise fail to compile. Read more
source§fn assume_not_null(self) -> AssumeNotNull<Self>
fn assume_not_null(self) -> AssumeNotNull<Self>
Converts this potentially nullable expression into one which will be assumed
to be not-null. This method has no impact on the generated SQL, however it will
enable you to attempt deserialization of the returned value in a non-
Option
. Read moresource§impl<T> PgExpressionMethods for Twhere
T: Expression,
impl<T> PgExpressionMethods for Twhere
T: Expression,
source§fn is_not_distinct_from<T>(
self,
other: T,
) -> Grouped<IsNotDistinctFrom<Self, <T as AsExpression<Self::SqlType>>::Expression>>
fn is_not_distinct_from<T>( self, other: T, ) -> Grouped<IsNotDistinctFrom<Self, <T as AsExpression<Self::SqlType>>::Expression>>
Creates a PostgreSQL
IS NOT DISTINCT FROM
expression. Read moresource§fn is_distinct_from<T>(
self,
other: T,
) -> Grouped<IsDistinctFrom<Self, <T as AsExpression<Self::SqlType>>::Expression>>
fn is_distinct_from<T>( self, other: T, ) -> Grouped<IsDistinctFrom<Self, <T as AsExpression<Self::SqlType>>::Expression>>
Creates a PostgreSQL
IS DISTINCT FROM
expression. Read moresource§impl<T> PgTrgmExpressionMethods for Twhere
T: Expression,
impl<T> PgTrgmExpressionMethods for Twhere
T: Expression,
source§fn fuzzy<U>(self, right: U) -> PgTrgmFuzzy<Self, U::Expression>
fn fuzzy<U>(self, right: U) -> PgTrgmFuzzy<Self, U::Expression>
source§impl<T, Conn> RunQueryDsl<Conn> for T
impl<T, Conn> RunQueryDsl<Conn> for T
source§fn execute<'conn, 'query>(
self,
conn: &'conn mut Conn,
) -> <Conn as AsyncConnection>::ExecuteFuture<'conn, 'query>
fn execute<'conn, 'query>( self, conn: &'conn mut Conn, ) -> <Conn as AsyncConnection>::ExecuteFuture<'conn, 'query>
Executes the given command, returning the number of rows affected. Read more
source§fn load<'query, 'conn, U>(
self,
conn: &'conn mut Conn,
) -> AndThen<Self::LoadFuture<'conn>, TryCollect<Self::Stream<'conn>, Vec<U>>, fn(_: Self::Stream<'conn>) -> TryCollect<Self::Stream<'conn>, Vec<U>>>
fn load<'query, 'conn, U>( self, conn: &'conn mut Conn, ) -> AndThen<Self::LoadFuture<'conn>, TryCollect<Self::Stream<'conn>, Vec<U>>, fn(_: Self::Stream<'conn>) -> TryCollect<Self::Stream<'conn>, Vec<U>>>
source§fn load_stream<'conn, 'query, U>(
self,
conn: &'conn mut Conn,
) -> Self::LoadFuture<'conn>where
Conn: AsyncConnection,
U: 'conn,
Self: LoadQuery<'query, Conn, U> + 'query,
fn load_stream<'conn, 'query, U>(
self,
conn: &'conn mut Conn,
) -> Self::LoadFuture<'conn>where
Conn: AsyncConnection,
U: 'conn,
Self: LoadQuery<'query, Conn, U> + 'query,
source§fn get_result<'query, 'conn, U>(
self,
conn: &'conn mut Conn,
) -> AndThen<Self::LoadFuture<'conn>, Map<StreamFuture<Pin<Box<Self::Stream<'conn>>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<Self::Stream<'conn>>>)) -> Result<U, Error>>, fn(_: Self::Stream<'conn>) -> Map<StreamFuture<Pin<Box<Self::Stream<'conn>>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<Self::Stream<'conn>>>)) -> Result<U, Error>>>
fn get_result<'query, 'conn, U>( self, conn: &'conn mut Conn, ) -> AndThen<Self::LoadFuture<'conn>, Map<StreamFuture<Pin<Box<Self::Stream<'conn>>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<Self::Stream<'conn>>>)) -> Result<U, Error>>, fn(_: Self::Stream<'conn>) -> Map<StreamFuture<Pin<Box<Self::Stream<'conn>>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<Self::Stream<'conn>>>)) -> Result<U, Error>>>
Runs the command, and returns the affected row. Read more
source§fn get_results<'query, 'conn, U>(
self,
conn: &'conn mut Conn,
) -> AndThen<Self::LoadFuture<'conn>, TryCollect<Self::Stream<'conn>, Vec<U>>, fn(_: Self::Stream<'conn>) -> TryCollect<Self::Stream<'conn>, Vec<U>>>
fn get_results<'query, 'conn, U>( self, conn: &'conn mut Conn, ) -> AndThen<Self::LoadFuture<'conn>, TryCollect<Self::Stream<'conn>, Vec<U>>, fn(_: Self::Stream<'conn>) -> TryCollect<Self::Stream<'conn>, Vec<U>>>
Runs the command, returning an
Vec
with the affected rows. Read moresource§fn first<'query, 'conn, U>(
self,
conn: &'conn mut Conn,
) -> AndThen<<Self::Output as LoadQuery<'query, Conn, U>>::LoadFuture<'conn>, Map<StreamFuture<Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>>>)) -> Result<U, Error>>, fn(_: <Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>) -> Map<StreamFuture<Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>>>)) -> Result<U, Error>>>
fn first<'query, 'conn, U>( self, conn: &'conn mut Conn, ) -> AndThen<<Self::Output as LoadQuery<'query, Conn, U>>::LoadFuture<'conn>, Map<StreamFuture<Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>>>)) -> Result<U, Error>>, fn(_: <Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>) -> Map<StreamFuture<Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>>>)) -> Result<U, Error>>>
Attempts to load a single record. Read more