NAME¶

ALTER_OPERATOR - change the definition of an operator

SYNOPSIS¶

ALTER OPERATOR name ( { left_type | NONE } , right_type )


    OWNER TO { new_owner | CURRENT_ROLE | CURRENT_USER | SESSION_USER }
ALTER OPERATOR name ( { left_type | NONE } , right_type )


    SET SCHEMA new_schema
ALTER OPERATOR name ( { 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 use ALTER OPERATOR. To alter the owner, you must be able to SET ROLE to the new owning role, and that role must have CREATE 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¶

name

left_type

right_type

new_owner

new_schema

res_proc

join_proc

com_op

neg_op

HASHES

MERGES

NOTES¶

Refer to Section 36.14 and Section 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 the com_op to be the target operator. Likewise, ALTER OPERATOR SET NEGATOR will also set the negator of the neg_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 operator a @@ b for type text:

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

Change the restriction and join selectivity estimator functions of a custom operator a && b for type int[]:

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 no ALTER OPERATOR statement in the SQL standard.

SEE ALSO¶

CREATE OPERATOR (CREATE_OPERATOR(7)), DROP OPERATOR (DROP_OPERATOR(7))