redhat man page for drop_operator_class

DROP OPERATOR 
CLASS(7)						   SQL Commands 					    DROP OPERATOR CLASS(7)

NAME
       DROP OPERATOR CLASS - remove a user-defined operator class

SYNOPSIS
       DROP OPERATOR CLASS name USING access_method [ CASCADE | RESTRICT ]

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

       access_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 there are any dependent objects.  This is the default.

   OUTPUTS
       DROP OPERATOR CLASS
	      The message returned if the command is successful.

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 [create_operator_class(7)] 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.

COMPATIBILITY
   SQL92
       There is no DROP OPERATOR CLASS in SQL92.

SQL - Language Statements					    2002-11-22						    DROP OPERATOR CLASS(7)