Enum ForeignKeyMatch 

pub enum ForeignKeyMatch {
    Full,
    Partial,
    Simple,
}

The MATCH mode of a foreign key, governing how a composite key containing NULLs matches. A bare REFERENCES omits it; PostgreSQL reports the omitted form as SIMPLE. A leaf vocabulary enum (no meta): like DropBehavior it holds no spanned children, so its span lives on the owning ForeignKeyRef.

Variants

Full

MATCH FULL — a partially-null referencing key is rejected.

Partial

MATCH PARTIAL — reserved by the standard; unimplemented by most engines.

Simple

MATCH SIMPLE — the default; a null in any referencing column skips the check.

Trait Implementations

impl Clone for ForeignKeyMatch

fn clone(&self) -> ForeignKeyMatch

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ForeignKeyMatch

impl Debug for ForeignKeyMatch

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ForeignKeyMatch

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ForeignKeyMatch

impl Hash for ForeignKeyMatch

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ForeignKeyMatch

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

Equality operator ==.

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

Inequality operator !=.

impl Render for ForeignKeyMatch

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

Return the render for this value.

fn operand_binding_power(&self) -> Option<BindingPower>

The binding power this node contributes when it appears as an operand, or None (the default) for a self-delimiting node — an atom, call, or constructor — that never needs parentheses.

impl Serialize for ForeignKeyMatch

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ForeignKeyMatch