05-04-2013
hi atul,
where did you take your exam and how much did you pay?
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LEARN ABOUT CENTOS
drop_function
DROP
FUNCTION(7) PostgreSQL 9.2.7 Documentation DROP FUNCTION(7)
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 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: IN, OUT, INOUT, or VARIADIC. 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, INOUT, and VARIADIC arguments.
argname
The name of an argument. Note that DROP FUNCTION does not actually pay any attention 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 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_FUNCTION(7))
PostgreSQL 9.2.7 2014-02-17 DROP FUNCTION(7)