Name
DROP FUNCTION
-- remove a user-defined function
Synopsis
DROP FUNCTION name ( [ type [, ...] ] )
Inputs
- name
The name of an existing function.
- type
The type of the function's parameters.
Outputs
- DROP
Message returned if the command completes successfully.
- NOTICE 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 argument lists.
Notes
Refer to
CREATE FUNCTION
for information on creating functions.
No checks are made to ensure that types, operators, access
methods, or triggers that rely on the function have been removed first.
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:
DROP FUNCTION name (arg, ...) { RESTRICT | CASCADE }
where CASCADE specifies dropping all objects that
depend on the function and RESTRICT refuses to
drop the function if dependent objects exist.