Changes the definition of an operator.

Synopsis

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

ALTER OPERATOR <name> ( {<left_type> | NONE} , {<right_type> | NONE} ) 
    SET SCHEMA <new_schema>

ALTER OPERATOR name ( { <left_type> | NONE } , { <right_type> | NONE } )
    SET ( {  RESTRICT = { <res_proc> | NONE }
           | JOIN = { <join_proc> | NONE }
         } [, ... ] )

Description

ALTER OPERATOR changes the definition of an operator.

You must own the operator to use ALTER OPERATOR. To alter the owner, you must also be a direct or indirect member of the new owning role, and that role must have CREATE privilege on the operator's schema. (These restrictions enforce that altering the owner does not do anything you could not do by dropping and recreating the operator. However, a superuser can alter ownership of any operator anyway.)

You must be a superuser to set a RESTRICT or JOIN estimator function that isn't one of the built-in selectivity estimators.

Parameters

name

The name (optionally schema-qualified) of an existing operator.

left_type

The data type of the operator's left operand; write NONE if the operator has no left operand.

right_type

The data type of the operator's right operand; write NONE if the operator has no right operand.

new_owner

The new owner of the operator.

new_schema

The new schema for the operator.

res_proc

The restriction selectivity estimator function for this operator; write NONE to remove the existing selectivity estimator.

join_proc

The join selectivity estimator function for this operator; write NONE to remove the existing selectivity estimator.

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 && (_int4, _int4) SET (RESTRICT = _int_contsel, JOIN = _int_contjoinsel);

Compatibility

There is no ALTER OPERATOR statement in the SQL standard.

See Also

CREATE OPERATOR, DROP OPERATOR

Parent topic: SQL Commands