Description
  
   DROP OPERATOR CLASS drops an existing operator class
   from the database.
   To execute this command you must be the owner of the operator class.
  
    Notes
   
    The DROP OPERATOR CLASS statement is a 
    PostgreSQL
    language extension.
   
    Refer to
    CREATE OPERATOR CLASS
    for information on how to create operator classes.
   
   Usage
  
   Remove B-tree operator class widget_ops:
   
DROP OPERATOR CLASS widget_ops USING btree;
   
   This command will not execute if there are any existing indexes
   that use the operator class.  Add CASCADE to drop
   such indexes along with the operator class.