drop_function(7) - phpMan

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 execute this command the
       user must be the owner of the function. The argument types to the function must be  speci-
       fied,  since  several different functions can exist with the same name and different argu-
       ment 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 arguments 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 actually pay any  atten-
              tion  to argument names, since only the argument 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 trig-
              gers).

       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_function(l)]



SQL - Language Statements                   2011-09-22                            DROP FUNCTION()

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