Enum ReturnTarget 

pub enum ReturnTarget {
    New,
    Old,
    Null,
    Expr(Expr),
}

Variants

New

RETURN NEW; — for BEFORE triggers, this is the row that actually gets written (possibly with NEW.col mutations applied). For AFTER triggers, the return value is ignored.

Old

RETURN OLD; — pass-through. For BEFORE DELETE this lets the delete proceed; for BEFORE UPDATE / INSERT it’s equivalent to dropping the write.

Null

RETURN NULL; — for BEFORE triggers, skips the write entirely. For AFTER, the return value is ignored.

Expr(Expr)

RETURN <expr>; — non-row return shape; reserved for the scalar UDF surface in v7.12.5+. Executor errors when used inside a trigger function.

Trait Implementations

impl Clone for ReturnTarget

fn clone(&self) -> ReturnTarget

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ReturnTarget

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

Formats the value using the given formatter.

impl PartialEq for ReturnTarget

fn eq(&self, other: &ReturnTarget) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ReturnTarget