Answer / malli.gontla

USER EXITS are FORMS and are called by SAP standard programs
using PERFORM.

CUSTOMER EXITS are FUNCTIONS so they are called using CALL
FUNCTION (or more exactly CALL CUSTOMER FUNCTION).

Inside the form (user exit) you can read and change almost
any global data from host program.
Inside a function (customer exit) you can only acces your
import/export/changing/tables parameters.

User exits are more flexible because you have more
information to use in your code but on the other hand , it
is very easy to manipulate erroneously global data and lead
the standard program to a dump or even to make database
inconsistent.
Customer exits are more restrictive but you are sure any
change you can make to any parameters will never lead to
inconsistency

User-exit doesn’t have any classification.
In customer-exit we have function-module exit , screen exit
, menu exit.


User exits are Basically designed For SD module.
Costomer exits Are available for MM,SD,FI,HR…..Basically
designed for all modules.

diff b/w user exit and badi

In user exits we go by general method for enhancements
while BADIs we use objects (oops concepts)
methods for enhancement


UserExits r used for adding additional functionality to the
existing SAP standard transactions.Using UserExits we can
add additional functionality standard SAP functionality
without making any changes to the original code.BADI is a
standardized interface for ABAP sources that enables
partners and customers to enhance SAP-delivered programs in
their namespace.

Answer / kamala

User exit - A user exit is a three character code that
instructs the system to access a program during system
processing.
SXX: S is for standard exits that are delivered by SAP.
XX represents the 2-digit exit number.
UXX: U is for user exits that are defined by the user. XX
represents the 2-digit exit number
Customer exit - The R/3 enhancement concept allows you to
add your own functionality to SAP’s standard business
applications without having to modify the original
applications. SAP creates customer exits for specific
programs, screens, and menus within standard R/3
applications. These exits do not contain any functionality.
Instead, the customer exits act as hooks. You can hang your
own add-on functionality onto these hooks.

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