Struct diesel::query_source::AliasedField

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pub struct AliasedField<S, F> { /* private fields */ }
Expand description

Represents an aliased field (column) within diesel’s query builder

See alias! for more details.

Trait Implementations§

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impl<S, F, __Rhs> Add<__Rhs> for AliasedField<S, F>
where Self: Expression, <Self as Expression>::SqlType: Add, <<Self as Expression>::SqlType as Add>::Rhs: SqlType + SingleValue, __Rhs: AsExpression<<<Self as Expression>::SqlType as Add>::Rhs>,

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type Output = Add<AliasedField<S, F>, <__Rhs as AsExpression<<<AliasedField<S, F> as Expression>::SqlType as Add>::Rhs>>::Expression>

The resulting type after applying the + operator.
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fn add(self, rhs: __Rhs) -> Self::Output

Performs the + operation. Read more
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impl<S: Clone, F: Clone> Clone for AliasedField<S, F>

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fn clone(&self) -> AliasedField<S, F>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<S: Debug, F: Debug> Debug for AliasedField<S, F>

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

Formats the value using the given formatter. Read more
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impl<S, F, __Rhs> Div<__Rhs> for AliasedField<S, F>
where Self: Expression, <Self as Expression>::SqlType: Div, <<Self as Expression>::SqlType as Div>::Rhs: SqlType + SingleValue, __Rhs: AsExpression<<<Self as Expression>::SqlType as Div>::Rhs>,

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type Output = Div<AliasedField<S, F>, <__Rhs as AsExpression<<<AliasedField<S, F> as Expression>::SqlType as Div>::Rhs>>::Expression>

The resulting type after applying the / operator.
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fn div(self, rhs: __Rhs) -> Self::Output

Performs the / operation. Read more
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impl<S, C> Expression for AliasedField<S, C>
where S: AliasSource, C: Column<Table = S::Target> + Expression,

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type SqlType = <C as Expression>::SqlType

The type that this expression represents in SQL
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impl<S, F, __Rhs> Mul<__Rhs> for AliasedField<S, F>
where Self: Expression, <Self as Expression>::SqlType: Mul, <<Self as Expression>::SqlType as Mul>::Rhs: SqlType + SingleValue, __Rhs: AsExpression<<<Self as Expression>::SqlType as Mul>::Rhs>,

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type Output = Mul<AliasedField<S, F>, <__Rhs as AsExpression<<<AliasedField<S, F> as Expression>::SqlType as Mul>::Rhs>>::Expression>

The resulting type after applying the * operator.
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fn mul(self, rhs: __Rhs) -> Self::Output

Performs the * operation. Read more
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impl<S, C, DB> QueryFragment<DB> for AliasedField<S, C>
where S: AliasSource, DB: Backend, C: Column<Table = S::Target>,

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

Walk over this QueryFragment for all passes. Read more
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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
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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
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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
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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?
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impl<S, C> QueryId for AliasedField<S, C>
where S: AliasSource + 'static, S::Target: 'static, C: Column<Table = S::Target> + 'static + QueryId,

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type QueryId = AliasedField<S, C>

A type which uniquely represents Self in a SQL query. Read more
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const HAS_STATIC_QUERY_ID: bool = <C as QueryId>::HAS_STATIC_QUERY_ID

Can the SQL generated by Self be uniquely identified by its type? Read more
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fn query_id() -> Option<TypeId>

Returns the type id of Self::QueryId if Self::HAS_STATIC_QUERY_ID. Returns None otherwise. Read more
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impl<S, F, __Rhs> Sub<__Rhs> for AliasedField<S, F>
where Self: Expression, <Self as Expression>::SqlType: Sub, <<Self as Expression>::SqlType as Sub>::Rhs: SqlType + SingleValue, __Rhs: AsExpression<<<Self as Expression>::SqlType as Sub>::Rhs>,

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type Output = Sub<AliasedField<S, F>, <__Rhs as AsExpression<<<AliasedField<S, F> as Expression>::SqlType as Sub>::Rhs>>::Expression>

The resulting type after applying the - operator.
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fn sub(self, rhs: __Rhs) -> Self::Output

Performs the - operation. Read more
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impl<S, C> ValidGrouping<()> for AliasedField<S, C>
where S: AliasSource, C: Column<Table = S::Target>,

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type IsAggregate = No

Is this expression aggregate? Read more
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impl<S, C1, C2> ValidGrouping<AliasedField<S, C1>> for AliasedField<S, C2>
where S: AliasSource, C1: Column<Table = S::Target>, C2: Column<Table = S::Target> + ValidGrouping<C1, IsAggregate = Yes>,

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type IsAggregate = Yes

Is this expression aggregate? Read more
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impl<QS, S, C> AppearsOnTable<QS> for AliasedField<S, C>
where S: AliasSource, QS: AppearsInFromClause<Alias<S>, Count = Once>, C: Column<Table = S::Target>,

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impl<S: Copy, F: Copy> Copy for AliasedField<S, F>

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impl<S, C> SelectableExpression<Alias<S>> for AliasedField<S, C>
where S: AliasSource, C: Column<Table = S::Target>, Self: AppearsOnTable<Alias<S>>,

Auto Trait Implementations§

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impl<S, F> Freeze for AliasedField<S, F>
where F: Freeze,

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impl<S, F> RefUnwindSafe for AliasedField<S, F>

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impl<S, F> Send for AliasedField<S, F>
where F: Send, S: Send,

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impl<S, F> Sync for AliasedField<S, F>
where F: Sync, S: Sync,

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impl<S, F> Unpin for AliasedField<S, F>
where F: Unpin, S: Unpin,

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impl<S, F> UnwindSafe for AliasedField<S, F>
where F: UnwindSafe, S: UnwindSafe,

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T, ST> AsExpression<ST> for T
where T: Expression<SqlType = ST>, ST: SqlType + TypedExpressionType,

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type Expression = T

The expression being returned
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fn as_expression(self) -> T

Perform the conversion
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<Conn, DB, T> ExecuteDsl<Conn, DB> for T
where Conn: Connection<Backend = DB>, DB: Backend, T: QueryFragment<DB> + QueryId,

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

Execute this command
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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impl<T> IntoSql for T

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fn into_sql<T>(self) -> AsExprOf<Self, T>

Convert self to an expression for Diesel’s query builder. Read more
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fn as_sql<'a, T>(&'a self) -> AsExprOf<&'a Self, T>

Convert &self to an expression for Diesel’s query builder. Read more
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impl<T> NullableExpressionMethods for T
where T: Expression,

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

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

Available on crate feature postgres_backend only.
Creates a PostgreSQL IS NOT DISTINCT FROM expression. Read more
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fn is_distinct_from<T>(self, other: T) -> IsDistinctFrom<Self, T>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>,

Available on crate feature postgres_backend only.
Creates a PostgreSQL IS DISTINCT FROM expression. Read more
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impl<T, DB> QueryFragmentForCachedStatement<DB> for T
where DB: Backend, <DB as Backend>::QueryBuilder: Default, T: QueryFragment<DB>,

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

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fn is<T>(self, other: T) -> Is<Self, T>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>,

Available on crate feature sqlite only.
Creates a Sqlite IS expression. Read more
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fn is_not<T>(self, other: T) -> IsNot<Self, T>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>,

Available on crate feature sqlite only.
Creates a Sqlite IS NOT expression. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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

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impl<T> MaybeSendSync for T