Hi swaminathan,
EXITS : they are for the purpose
of calling customer abap code,
from standard transaction,
at specific points (eg. while showing
default values on screen, while saving,
while validations, etc)
1. Previously there were only user-exits.
2. Then came the concept of customer-exits.
3.
user exits were nothing but
subroutines
FORM/PERFORM
called from standard programs.
4. The FORM defintion was placed inside
an empty include file.
5. So It was called EVERYTIME.
and we need to MODIFY/REPAIR the
standard include .
6. Then it came with concept of customer-exit
7. It consists of calling a FUNCTION MODULE,
which is called only if
the user-exit is ACTIVATED (other wise not called)
In this case, the code in put inside
a pre-defined Z include.
*----
8. Functionality of both is same, howerver
we can note the following important differences
a) Customer exit is called only if activated.
(hence, it does not waste resources)
b) in customer exit, REPAIR does not happen
to the standard include.
regards,
amit m.
Bluesky
