Enum ReferentialAction 

pub enum ReferentialAction {
    NoAction {
        meta: Meta,
    },
    Restrict {
        meta: Meta,
    },
    Cascade {
        meta: Meta,
    },
    SetNull {
        columns: ThinVec<Ident>,
        meta: Meta,
    },
    SetDefault {
        columns: ThinVec<Ident>,
        meta: Meta,
    },
}

A foreign-key <referential action>: what a delete (ON DELETE) or update (ON UPDATE) of the referenced row does to the referencing rows.

SetNull/SetDefault carry the optional PostgreSQL column list (SET NULL (col, ...)), which restricts the action to a subset of the referencing columns; the grammar accepts the list only on ON DELETE, so it is always empty for an ON UPDATE action and for the bare keyword forms. Each variant carries meta because the action is a span-bearing node — the SET NULL (col) form references spanned Idents — mirroring IdentityOption.

Variants

NoAction

NO ACTION — reject the change if references remain (deferrable).

Fields

meta: Meta

Source location and node identity.

Restrict

RESTRICT — reject the change immediately if references remain.

Fields

meta: Meta

Source location and node identity.

Cascade

CASCADE — propagate the delete/update to the referencing rows.

Fields

meta: Meta

Source location and node identity.

SetNull

SET NULL — null out the referencing columns (optionally a subset).

Fields

columns: ThinVec<Ident>

Columns in source order.

meta: Meta

Source location and node identity.

SetDefault

SET DEFAULT — reset the referencing columns to their defaults.

Fields

columns: ThinVec<Ident>

Columns in source order.

meta: Meta

Source location and node identity.

Trait Implementations

impl Clone for ReferentialAction

fn clone(&self) -> ReferentialAction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ReferentialAction

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ReferentialAction

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ReferentialAction

impl Hash for ReferentialAction

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 ReferentialAction

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

Equality operator ==.

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

Inequality operator !=.

impl Render for ReferentialAction

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 ReferentialAction

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Spanned for ReferentialAction

fn span(&self) -> Span

Return the span for this value.

impl StructuralPartialEq for ReferentialAction