DROP OPERATOR CLASS SQL - Language Statements DROP OPERATOR CLASS remove an operator class DROP OPERATOR CLASS DROP OPERATOR CLASS [ IF EXISTS ] name USING index_method [ CASCADE | RESTRICT ] DROP OPERATOR CLASS drops an existing operator class. To execute this command you must be the owner of the operator class. IF EXISTS Do not throw an error if the operator class does not exist. A notice is issued in this case. name The name (optionally schema-qualified) of an existing operator class. index_method The name of the index access method the operator class is for. CASCADE Automatically drop objects that depend on the operator class. RESTRICT Refuse to drop the operator class if any objects depend on it. This is the default. Remove the B-tree operator class widget_ops: DROP OPERATOR CLASS widget_ops USING btree; This command will not succeed if there are any existing indexes that use the operator class. Add CASCADE to drop such indexes along with the operator class. There is no DROP OPERATOR CLASS statement in the SQL standard.