A R J U N . L E A R N R E A L T I M E S C E N A R I O S D O N E B Y M E

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A B A P & W E B D Y N P R O A B A P @ A R J U N IGROWSOFT

Function modules A Function module is a sub program which contains a piece of abap code which is used for

specific functionality or a task.

Function modules contains importing and exporting parameters

Function modules also contains Exceptions to raise Error messages

Function modules can be tested independently

Function modules can be debugged independently

Function modules are mainly used for global modularization i.e., once a function module is

created it can be used by multiple program throughout SAP.

Function Group:

It is a Group or container of function modules

Whenever we create a function module, it must be saved under a group called as

function group.

Diff Function modules in a function group can share global data.(TOP include prog)

There are two ways to create a function group.

1. From Tcode SE80

2. From Tcode SE37 click on Menu Go to Function groupscreate group

STEPS TO CREATE A FUNCTION GROUP:

Go to SE80

Give the function group name as ZFGRP

Press enter

Click on yes button

Function Group will be created

Whenever a function Group is created, by default a main program and to include programs will be

created

Ex: SAPL < Function Group Name> Main group

Ex: L< function grp name> Top Include prgs

L< function grp name> UXX Include prgs

Note: Always the function group should be activated immediately

A R J U N . L E A R N R E A L T I M E S C E N A R I O S D O N E B Y M E

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A B A P & W E B D Y N P R O A B A P @ A R J U N IGROWSOFT

Components of a Function Module:

1. Import Input to a fmod are called as Importing parameter

2. Export Output from a fmod are called as exporting

3. Changing A variable/wa which acts as Imports/ Export are called as changing parameters

4. Tables Internal tables as Input & output are called as table parameters

5. Exception Are used to catch certain type of errors

6. Source code Contain the ABAP code for a FMOD

Note: TABLES PARAMETERS are OBSOLETE in SAP

They are no longer used in SAP

So we create a table type which act as internal table

We create table types in SE11

Table types are used in advanced ABAP, i.e., OOABAP. We will discuss in OO ABAP.