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ALTER OPERATOR

ALTER OPERATOR — change the definition of an operator

Synopsis

ALTER OPERATORname ( {left_type | NONE } ,right_type )    OWNER TO {new_owner | CURRENT_ROLE | CURRENT_USER | SESSION_USER }ALTER OPERATORname ( {left_type | NONE } ,right_type )    SET SCHEMAnew_schemaALTER OPERATORname ( {left_type | NONE } ,right_type )    SET ( {  RESTRICT = {res_proc | NONE }           | JOIN = {join_proc | NONE }           | COMMUTATOR =com_op           | NEGATOR =neg_op           | HASHES           | MERGES          } [, ... ] )

Description

ALTER OPERATOR changes the definition of an operator.

You must own the operator to useALTER OPERATOR. To alter the owner, you must be able toSET ROLE to the new owning role, and that role must haveCREATE privilege on the operator's schema. (These restrictions enforce that altering the owner doesn't do anything you couldn't do by dropping and recreating the operator. However, a superuser can alter ownership of any operator anyway.)

Parameters

Notes

Refer toSection 36.14 andSection 36.15 for further information.

Since commutators come in pairs that are commutators of each other,ALTER OPERATOR SET COMMUTATOR will also set the commutator of thecom_op to be the target operator. Likewise,ALTER OPERATOR SET NEGATOR will also set the negator of theneg_op to be the target operator. Therefore, you must own the commutator or negator operator as well as the target operator.

Examples

Change the owner of a custom operatora @@ b for typetext:

ALTER OPERATOR @@ (text, text) OWNER TO joe;

Change the restriction and join selectivity estimator functions of a custom operatora && b for typeint[]:

ALTER OPERATOR && (int[], int[]) SET (RESTRICT = _int_contsel, JOIN = _int_contjoinsel);

Mark the&& operator as being its own commutator:

ALTER OPERATOR && (int[], int[]) SET (COMMUTATOR = &&);

Compatibility

There is noALTER OPERATOR statement in the SQL standard.

See Also