This might happen to anyone who are developing a code, there
might be chances that you accidentally dropped your code or accidentally
overwritten the code.
Oracle has provided various flashback features through which
you can recover your code.
Now let us see how to recover your code.
I have created a sample function as shown below.
CREATE OR REPLACE FUNCTION APPS.FLASHTEST
RETURN DATE
IS
result DATE;
BEGIN
result:=NULL;