-- column_constraint, table_constraint: CONSTRAINT, NOT NULL, NULL, CHECK ( .. ) NO INHERIT, DEFAULT .., EXCLUDE USING .. ( .. WITH .. ) .. WHERE ( .. ), GENERATED ALWAYS AS IDENTITY, GENERATED ALWAYS AS IDENTITY ( .. ), GENERATED BY DEFAULT AS IDENTITY, UNIQUE .., UNIQUE ( .. ), PRIMARY KEY .., PRIMARY KEY ( .. ), REFERENCES, REFERENCES .. ( .. ), MATCH FULL, MATCH PARTIAL, MATCH SIMPLE, ON DELETE .., ON UPDATE .., DEFERRABLE, NOT DEFERRABLE, INITIALLY DEFERRED, INITIALLY IMMEDIATE, FOREIGN KEY ( .. ) REFERENCES, USING INDEX bar, INCLUDE ( .. ), WITH ( .. ), USING INDEX TABLESPACE;