Struct backend::schema::users::columns::star

source · 
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 Clone for star

source§

fn clone(&self) -> star

Returns a copy 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 star

source§

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

Formats the value using the given formatter. Read more
source§

impl Expression for star

§

type SqlType = NotSelectable

The type that this expression represents in SQL
source§

impl<DB: Backend> QueryFragment<DB> for star
where <table as QuerySource>::FromClause: QueryFragment<DB>,

source§

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

Walk over this QueryFragment for all passes. Read more
source§

fn to_sql( &self, out: &mut <DB as Backend>::QueryBuilder, backend: &DB, ) -> Result<(), Error>

Converts this QueryFragment to its SQL representation. Read more
source§

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§

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

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

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

Does walking this AST have any effect?
source§

impl QueryId for star

§

type QueryId = star

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

const HAS_STATIC_QUERY_ID: bool = true

Can the SQL generated by Self be uniquely identified by its type? 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<__GB> ValidGrouping<__GB> for star
where (id, salutation, title, country, phone, website, organization, experience, membership, member_years, member_since, permacoins): ValidGrouping<__GB>,

§

type IsAggregate = <(id, salutation, title, country, phone, website, organization, experience, membership, member_years, member_since, permacoins) as ValidGrouping<__GB>>::IsAggregate

Is this expression aggregate? Read more
source§

impl AppearsOnTable<table> for star

source§

impl Copy for star

source§

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> 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: Copy,

source§

unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
source§

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

source§

default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
source§

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

source§

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
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> Instrument for T

source§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
source§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

impl<T, U> Into<U> 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> IntoEither for T

source§

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 more
source§

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

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 more
source§

impl<T> IntoSql for T

source§

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

Convert self to an expression for Diesel’s query builder. Read more
source§

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

Convert &self to an expression for Diesel’s query builder. Read more
source§

impl<T> NullableExpressionMethods for T
where T: Expression,

source§

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>

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 more
source§

impl<T> Paginate for T

source§

fn paginate(self, page: Option<i32>) -> PaginatedQuery<T>

Return a paginated version of a query for a specific page number.
source§

impl<T> PgExpressionMethods for T
where T: Expression,

source§

fn is_not_distinct_from<T>( self, other: T, ) -> Grouped<IsNotDistinctFrom<Self, <T as AsExpression<Self::SqlType>>::Expression>>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>,

Creates a PostgreSQL IS NOT DISTINCT FROM expression. Read more
source§

fn is_distinct_from<T>( self, other: T, ) -> Grouped<IsDistinctFrom<Self, <T as AsExpression<Self::SqlType>>::Expression>>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>,

Creates a PostgreSQL IS DISTINCT FROM expression. Read more
source§

impl<T> PgTrgmExpressionMethods for T
where T: Expression,

source§

fn fuzzy<U>(self, right: U) -> PgTrgmFuzzy<Self, U::Expression>
where Self::SqlType: SqlType, U: AsExpression<Self::SqlType>,

Fuzzy search. Uses the pg_trgm % operator. Read more
source§

impl<T, Conn> RunQueryDsl<Conn> for T

source§

fn execute<'conn, 'query>( self, conn: &'conn mut Conn, ) -> <Conn as AsyncConnection>::ExecuteFuture<'conn, 'query>
where Conn: AsyncConnection + Send, Self: ExecuteDsl<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>>>
where U: Send, Conn: AsyncConnection, Self: LoadQuery<'query, Conn, U> + 'query,

Executes the given query, returning a Vec with the returned rows. Read more
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,

Executes the given query, returning a Stream with the returned rows. Read more
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>>>
where U: Send + 'conn, Conn: AsyncConnection, Self: LoadQuery<'query, Conn, U> + 'query,

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>>>
where U: Send, Conn: AsyncConnection, Self: LoadQuery<'query, Conn, U> + 'query,

Runs the command, returning an Vec with the affected rows. Read more
source§

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>>>
where U: Send + 'conn, Conn: AsyncConnection, Self: LimitDsl, Self::Output: LoadQuery<'query, Conn, U> + Send + 'query,

Attempts to load a single record. Read more
source§

impl<T> Same for T

§

type Output = T

Should always be Self
source§

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

§

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

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

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

Performs the conversion.
source§

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

§

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

The type returned in the event of a conversion error.
source§

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

Performs the conversion.
source§

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

source§

fn vzip(self) -> V

source§

impl<T> WithSubscriber for T

source§

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

impl<T> NonAggregate for T
where T: ValidGrouping<()>, <T as ValidGrouping<()>>::IsAggregate: MixedAggregates<No, Output = No>,