Struct ColumnConstraint 

pub struct ColumnConstraint<X: Extension = NoExt> {
    pub name: Option<Ident>,
    pub option: ColumnOption<X>,
    pub conflict: Option<ConflictResolution>,
    pub characteristics: Option<Box<ConstraintCharacteristics>>,
    pub meta: Meta,
}

An SQL column constraint.

Fields

name: Option<Ident>

Name referenced by this syntax.

option: ColumnOption<X>

Optional option for this syntax.

conflict: Option<ConflictResolution>

The SQLite ON CONFLICT <resolution> clause attached to this constraint — a INTEGER UNIQUE ON CONFLICT REPLACE. Modelled on the constraint wrapper (like characteristics) rather than on the individual ColumnOption variants because the conflict clause qualifies a constraint (SQLite admits it after NOT NULL / UNIQUE / PRIMARY KEY / CHECK), and the parser only reads it after one of those. None when unwritten. Gated for acceptance by ColumnDefinitionSyntax::column_conflict_resolution_clause; off elsewhere, where ON CONFLICT on a column constraint is a clean parse error.

characteristics: Option<Box<ConstraintCharacteristics>>

The trailing DEFERRABLE/INITIALLY characteristics, when written. Modelled on the constraint wrapper rather than on ColumnOption::References because the SQL characteristic qualifies a constraint generally (unique / primary key / foreign key), not the reference clause specifically. Boxed because it is a cold, rarely written clause: the common column constraint then pays only a null pointer, keeping this warm node lean (the box/inline budget).

meta: Meta

Source location and node identity.

Trait Implementations

impl<X: Clone + Extension> Clone for ColumnConstraint<X>

fn clone(&self) -> ColumnConstraint<X>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<X: Debug + Extension> Debug for ColumnConstraint<X>

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

Formats the value using the given formatter.

impl<'de, X> Deserialize<'de> for ColumnConstraint<X>

where X: Deserialize<'de> + Extension,

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<X: Eq + Extension> Eq for ColumnConstraint<X>

impl<X: Hash + Extension> Hash for ColumnConstraint<X>

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<X: PartialEq + Extension> PartialEq for ColumnConstraint<X>

fn eq(&self, other: &ColumnConstraint<X>) -> bool

Equality operator ==.

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

Inequality operator !=.

impl<X: Extension + Render> Render for ColumnConstraint<X>

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<X> Serialize for ColumnConstraint<X>

where X: Serialize + Extension,

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<X: Extension> Spanned for ColumnConstraint<X>

fn span(&self) -> Span

Return the span for this value.

impl<X: PartialEq + Extension> StructuralPartialEq for ColumnConstraint<X>