Struct Constraint 

pub struct Constraint {

    pub oid: u32,
    pub name: String,
    pub namespace: u32,
    pub kind: ConKind,
    pub relation: u32,
    pub domain: u32,
    pub keys: Vec<i16>,
    pub index: u32,
    pub deferrable: bool,
    pub deferred: bool,
    pub validated: bool,
    pub enforced: bool,
    pub no_inherit: bool,
    pub local: bool,
    pub inhcount: i16,
    pub parent: u32,
    pub expr: Option<String>,
    pub foreign: Option<ForeignKey>,
}

A constraint, one row of pg_constraint.

Fields

oid: u32

The OID.

name: String

The name.

namespace: u32

The OID of the schema.

kind: ConKind

The kind.

relation: u32

The OID of the relation, or 0 for a constraint of a domain.

domain: u32

contypid: the OID of the domain of a domain constraint, else 0.

keys: Vec<i16>

The constrained columns, conkey.

index: u32

The OID of the index of a primary key, a unique constraint or a foreign key, else 0.

deferrable: bool

condeferrable.

deferred: bool

condeferred.

validated: bool

convalidated.

enforced: bool

conenforced: false for a check constraint or a foreign key that is NOT ENFORCED. Writes do not check such a constraint.

no_inherit: bool

connoinherit.

local: bool

conislocal: false for a constraint that only a parent table gives.

inhcount: i16

coninhcount: the number of parent tables that give the constraint.

parent: u32

conparentid: the constraint of the parent table that a constraint of a partition comes from, or 0.

expr: Option<String>

The expression of a check constraint, in the form of the analyzer.

foreign: Option<ForeignKey>

The facts of a foreign key.

Trait Implementations

impl Clone for Constraint

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Constraint

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

Formats the value using the given formatter.

impl Eq for Constraint

impl PartialEq for Constraint

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Constraint