NAME

       ALTER_OPERATOR - change 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 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
           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
           existing selectivity estimator.

       join_proc
           The join selectivity estimator function for this operator; write NONE to remove
           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 (CREATE_OPERATOR(7)), DROP OPERATOR (DROP_OPERATOR(7))