DROP FUNCTION(7) PostgreSQL 9.6.6 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), and in turn all objects that depend on
those objects (see Section 5.13, "Dependency Tracking", in the
documentation).
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 9.6.6 2017 DROP FUNCTION(7)
PostgreSQL 9.6.6 - Generated Sat Dec 2 08:51:00 CST 2017