Struct diesel::expression::Concat

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#[non_exhaustive]
pub struct Concat<L, R> { pub left: L, pub right: R, }
Expand description

This type represents a string concat operator

Fields (Non-exhaustive)§

This struct is marked as non-exhaustive
Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.
§left: L

The left side expression of the operator

§right: R

The right side expression of the operator

Trait Implementations§

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impl<L, R, __Rhs> Add<__Rhs> for Concat<L, R>
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<Concat<L, R>, <__Rhs as AsExpression<<<Concat<L, R> 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<L: Clone, R: Clone> Clone for Concat<L, R>

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fn clone(&self) -> Concat<L, R>

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<L: Debug, R: Debug> Debug for Concat<L, R>

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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<L, R, __Rhs> Div<__Rhs> for Concat<L, R>
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<Concat<L, R>, <__Rhs as AsExpression<<<Concat<L, R> 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<L, R, ST> Expression for Concat<L, R>
where L: Expression<SqlType = ST>, R: Expression<SqlType = ST>, ST: SqlType + TypedExpressionType,

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type SqlType = ST

The type that this expression represents in SQL
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impl<L, R, __Rhs> Mul<__Rhs> for Concat<L, R>
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<Concat<L, R>, <__Rhs as AsExpression<<<Concat<L, R> 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<L, R, DB> QueryFragment<DB> for Concat<L, R>
where DB: Backend, Self: QueryFragment<DB, DB::ConcatClause>,

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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<()>

Converts this QueryFragment to its SQL representation. Read more
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fn collect_binds<'b>( &'b self, out: &mut <DB as HasBindCollector<'b>>::BindCollector, metadata_lookup: &mut DB::MetadataLookup, backend: &'b DB, ) -> QueryResult<()>

Serializes all bind parameters in this query. Read more
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fn is_safe_to_cache_prepared(&self, backend: &DB) -> QueryResult<bool>

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>

Does walking this AST have any effect?
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impl<L, R, DB> QueryFragment<DB, ConcatWithPipesClause> for Concat<L, R>
where L: QueryFragment<DB>, R: QueryFragment<DB>, DB: Backend + SqlDialect<ConcatClause = ConcatWithPipesClause>,

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fn walk_ast<'b>(&'b self, out: 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<()>

Converts this QueryFragment to its SQL representation. Read more
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fn collect_binds<'b>( &'b self, out: &mut <DB as HasBindCollector<'b>>::BindCollector, metadata_lookup: &mut DB::MetadataLookup, backend: &'b DB, ) -> QueryResult<()>

Serializes all bind parameters in this query. Read more
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fn is_safe_to_cache_prepared(&self, backend: &DB) -> QueryResult<bool>

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>

Does walking this AST have any effect?
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impl<L: QueryId, R: QueryId> QueryId for Concat<L, R>

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type QueryId = Concat<<L as QueryId>::QueryId, <R as QueryId>::QueryId>

A type which uniquely represents Self in a SQL query. Read more
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const HAS_STATIC_QUERY_ID: bool = _

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<L, R, __Rhs> Sub<__Rhs> for Concat<L, R>
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<Concat<L, R>, <__Rhs as AsExpression<<<Concat<L, R> 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<L, R, __GroupByClause> ValidGrouping<__GroupByClause> for Concat<L, R>
where L: ValidGrouping<__GroupByClause>, R: ValidGrouping<__GroupByClause>, L::IsAggregate: MixedAggregates<R::IsAggregate>,

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type IsAggregate = <<L as ValidGrouping<__GroupByClause>>::IsAggregate as MixedAggregates<<R as ValidGrouping<__GroupByClause>>::IsAggregate>>::Output

Is this expression aggregate? Read more
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impl<L, R, QS> AppearsOnTable<QS> for Concat<L, R>
where Concat<L, R>: Expression, L: AppearsOnTable<QS>, R: AppearsOnTable<QS>,

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impl<L: Copy, R: Copy> Copy for Concat<L, R>

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impl<L, R, QS> SelectableExpression<QS> for Concat<L, R>

Auto Trait Implementations§

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impl<L, R> Freeze for Concat<L, R>
where L: Freeze, R: Freeze,

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impl<L, R> RefUnwindSafe for Concat<L, R>

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impl<L, R> Send for Concat<L, R>
where L: Send, R: Send,

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impl<L, R> Sync for Concat<L, R>
where L: Sync, R: Sync,

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impl<L, R> Unpin for Concat<L, R>
where L: Unpin, R: Unpin,

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impl<L, R> UnwindSafe for Concat<L, R>
where L: UnwindSafe, R: 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<T> CloneToUninit for T
where T: Copy,

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

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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
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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>,

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>,

Creates a PostgreSQL IS DISTINCT FROM 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.