DROP FUNCTION
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.