what is function group? Difference between function group
and FM?
- 8 Answers
- 31219 Views
- IBM, I also Faced
- E-Mail Answers
Answer Posted / srinivas kari
Function groups are containers for function modules. You cannot execute a function group. When you call a function module, the system loads the whole of its function group into the internal session of the calling program (if it has not already been loaded). For further information, refer to Organization of External Procedure Calls.
The following diagram shows the structure of a function group: The name of a function group, fgrpcan be up to 26 characters long. This is used by the system to create the components of the group (main program and corresponding include programs). When you create a function group or function module in the Function Builder , the main program and include programs are generated automatically.
This graphic is explained in the accompanying text
The main program SAPLfgrp contains nothing but the INCLUDE statements for the following include programs:
· LfgrpTOP. This contains the FUNCTION-POOL statement (equivalent for a function group of the REPORT or PROGRAMstatement) and global data declarations for the entire function group.
· LfgrpUXX. This contains further INCLUDEstatements for the include programs LfgrpU01, LfgrpU02,... These includes contain the actual function modules.
· The include programs LfgrpF01, LfgrpF02,... can contain the coding of subroutines that can be called with internal subroutine calls from all function modules of the group.
The creation of these INCLUDE programs is supported from the ABAP Workbench by forward navigation (for example creation of a subroutine include by double clicking on the name of a subroutine in a PERFORM statement within a function module).
You cannot declare a COMMON PART in a function group. Function groups have their own table work areas (TABLES). Function groups encapsulate data. In this respect, they are a precursor of ABAP Objects (see From Function Groups to Objects ).
All of the function modules in a function group can access the global data of the group. For this reason, you should place all function modules that use the same data in a single function group. For example, if you have a set of function modules that all use the same internal table, you could place them in a function group containing the table definition in its global data.
Function groups, like executable programs and module pools, can contain screens (selection screens and lists) as components. User input is processed either in dialog modules or in the corresponding event blocks in the main program of the function group. There are special include programs in which you can write this code. In this way, you can use function groups to encapsulate single screens or screen sequences.
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
Difference between user exit and badis?
How do you save data in bdc tables? : abap bdc
How did you transfer legacy data in the mid of the financial year (us) to the sap system? : sap abap hr
Explain pai and pbo.
What are the problems in processing batch input sessions?
The commands through which an abap/4 module can “branch to “ or “call” the next screen are?
What is the significance of the memory table ‘screen’?
How many structures can be created in a Ztable ?
stock transfer from one plant to another plant ? i want the total description.
Explain open dataset in sap abap?
In sap script how to print bar code in vertical manner
If I want to execute a bdc program only in background not in foreground is there any option for this? : abap bdc
Can we control the sequence in which multiple implementations of a multiple use BADI are called? If yes, how?
How can you display frames (horizontal and vertical lines) in lists?
How to display if the value entered contains records or not?
