DROP OPERATOR — remove an operator
DROP OPERATORname( {lefttype| NONE } , {righttype| NONE } ) [ CASCADE | RESTRICT ]
DROP OPERATOR drops an existing operator from
the database system. To execute this command you must be the owner
of the operator.
nameThe name (optionally schema-qualified) of an existing operator.
lefttype The data type of the operator's left operand; write
NONE if the operator has no left operand.
righttype The data type of the operator's right operand; write
NONE if the operator has no right operand.
CASCADEAutomatically drop objects that depend on the operator.
RESTRICTRefuse to drop the operator if any objects depend on it. This is the default.