Name
DROP FUNCTION
-- Removes a user-defined C function
Synopsis
DROP FUNCTION name ( [ type [, ...] ] )
Inputs
- name
The name of an existing function.
- type
The type of function 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 references to an existing C
function. To execute this command the user must be the
owner of the function. The input argument types to the
function must be specified, as only the function with the
given name and argument types will be removed.
Notes
Refer to
CREATE FUNCTION
for information on creating aggregate functions.
No checks are made to ensure that types, operators or access
methods that rely on the function have been removed first.
Usage
This command removes the square root function:
DROP FUNCTION sqrt(int4);
Compatibility
SQL92
DROP FUNCTION
is a Postgres language extension.
SQL/PSM
SQL/PSM is a proposed standard to enable function extensibility.
The SQL/PSM DROP FUNCTION statement has the following syntax:
DROP [ SPECIFIC ] FUNCTION name { RESTRICT | CASCADE }