DROP FUNCTION() 		 SQL Commands		       DROP FUNCTION()



NAME
       DROP FUNCTION - remove a function


SYNOPSIS
       DROP FUNCTION [ IF EXISTS ] name ( [ [ argmode ] [ argname ] argtype [, ...] ] )
	   [ CASCADE | RESTRICT ]


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

PARAMETERS
       IF EXISTS
	      Do not throw an error if the function does not exist.  A	notice
	      is issued in this case.

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

       argmode
	      The mode of an argument: either IN, OUT, or INOUT.  If  omitted,
	      the  default  is	IN.  Note that DROP FUNCTION does not actually
	      pay any attention to OUT arguments, since only the  input  argu-
	      ments are needed to determine the function's identity.  So it is
	      sufficient to list the IN and INOUT arguments.

       argname
	      The name of an argument.	Note that DROP FUNCTION does not actu-
	      ally  pay  any attention to argument names, since only the argu-
	      ment data types are needed to determine the function's identity.

       argtype
	      The data type(s) of the function's arguments (optionally schema-
	      qualified), if any.

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

       RESTRICT
	      Refuse to drop the function if any objects depend on it. This is
	      the default.

EXAMPLES
       This command removes the square root function:

       DROP FUNCTION sqrt(integer);


COMPATIBILITY
       A DROP FUNCTION statement is defined in the SQL standard, but it is not
       compatible with this command.

SEE ALSO
       CREATE	FUNCTION  [create_function(7)],  ALTER	FUNCTION  [alter_func-
       tion(l)]



SQL - Language Statements	  2010-03-12		       DROP FUNCTION()