Struct AliasedExpr 

pub struct AliasedExpr<E> { /* private fields */ }

An expression aliased with AS "name".

Preserves the original expression’s type information (ExprValueType, Expr, etc.) so that aliased columns in SELECT tuples still infer the correct row type.

Trait Implementations

impl<E: Clone> Clone for AliasedExpr<E>

fn clone(&self) -> AliasedExpr<E>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<E: Copy> Copy for AliasedExpr<E>

impl<E: Debug> Debug for AliasedExpr<E>

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

Formats the value using the given formatter.

impl<'a, V, E> Expr<'a, V> for AliasedExpr<E>

where V: SQLParam + 'a, E: Expr<'a, V>,

type SQLType = <E as Expr<'a, V>>::SQLType

The SQL data type this expression evaluates to.

type Nullable = <E as Expr<'a, V>>::Nullable

Whether this expression can be NULL.

type Aggregate = <E as Expr<'a, V>>::Aggregate

Whether this is an aggregate (COUNT, SUM) or scalar expression.

fn to_expr_sql(&self) -> SQL<'a, V>

Render this value as a scalar expression by reference.

fn into_expr_sql(self) -> SQL<'a, V>

Render this value as a scalar expression, consuming it when useful.

impl<E: ExprValueType> ExprValueType for AliasedExpr<E>

type ValueType = <E as ExprValueType>::ValueType

impl<E: GroupByIdentity> GroupByIdentity for AliasedExpr<E>

type Identity = <E as GroupByIdentity>::Identity

impl<E: HasAggStatus> HasAggStatus for AliasedExpr<E>

type Status = <E as HasAggStatus>::Status

impl<E> IntoSelectTarget for AliasedExpr<E>

where E: ExprValueType,

type Marker = SelectCols<(AliasedExpr<E>,)>

impl<'a, V, E> ToSQL<'a, V> for AliasedExpr<E>

where V: SQLParam + 'a, E: ToSQL<'a, V>,

fn to_sql(&self) -> SQL<'a, V>

fn into_sql(self) -> SQL<'a, V>

Consume self and return SQL without cloning. Default delegates to to_sql() (which clones). Types that own their SQL (like SQL and SQLExpr) override this to avoid the clone.