Struct Excluded 

pub struct Excluded<C> { /* private fields */ }

Wraps a column to reference its value from the proposed insert row (the EXCLUDED row in ON CONFLICT DO UPDATE SET).

Trait Implementations

impl<C: Clone> Clone for Excluded<C>

fn clone(&self) -> Excluded<C>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<C: Copy> Copy for Excluded<C>

impl<C: Debug> Debug for Excluded<C>

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

Formats the value using the given formatter.

impl<'a, V, C> Expr<'a, V> for Excluded<C>

where V: SQLParam + 'a, C: Expr<'a, V> + SQLColumnInfo,

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

The SQL data type this expression evaluates to.

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

Whether this expression can be NULL.

type Aggregate = <C 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>

where Self: Sized,

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

impl<'a, V, C> ToSQL<'a, V> for Excluded<C>

where V: SQLParam + 'a, C: SQLColumnInfo,

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

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

where Self: Sized,

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.