redhat man page for drop_function

DROP 
FUNCTION(7)						   SQL Commands 						  DROP FUNCTION(7)

NAME
       DROP FUNCTION - remove a user-defined function

SYNOPSIS
       DROP FUNCTION name ( [ type [, ...] ] ) [ CASCADE | RESTRICT ]

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

       type   The type of a parameter of the function.

       CASCADE
	      Automatically drop objects that depend on the function (such as operators or triggers).

       RESTRICT
	      Refuse to drop the function if there are any dependent objects.  This is the default.

   OUTPUTS
       DROP FUNCTION
	      Message returned if the command completes successfully.

       WARNING: RemoveFunction: Function "name" ("types") does not exist
	      This message is given if the function specified does not exist in the current database.

DESCRIPTION
       DROP  FUNCTION  will remove the definition of an existing function. To execute this command the user must be the owner of the function. The
       input argument types to the function must be specified, since several different functions may exist with the same name and different  argu-
       ment lists.

NOTES
       Refer to CREATE FUNCTION [create_function(7)] for information on creating functions.

EXAMPLES
       This command removes the square root function:

       DROP FUNCTION sqrt(integer);

COMPATIBILITY
       A DROP FUNCTION statement is defined in SQL99. One of its syntax forms is similar to PostgreSQL's.

SEE ALSO
       CREATE FUNCTION [create_function(7)]

SQL - Language Statements					    2002-11-22							  DROP FUNCTION(7)