Different ways to Datasource Enhancement

Question

I know DS enhancement can be done through ABAP Statement CASE,ENDCASE,WHEN. I came to know that this is old technique to enhance the datasource as it makes the code quite messy if several developers work on the same code.
I came across one document on SDN where we create a new program for each datasource which is independent from other enhancement.
I just want to know how this program works and the difference between this technique and old technique as i have limited ABAP knowledge.
What are the exact challenges that we come across when we use CASE,ENDCASE,WHEN statements.
Edited by: Murali K on Jun 1, 2010 6:31 AM

Answer 1

Hi Murli,
1) Datasource enhancement previously was done using CMOD Still many organizatins continue with this approach.
Here you can get option to write code for your appended field in ur Standard datsource where you can write select statements etc.
2) Now SAP is recommending to Write Codes using BADI .this approach helps to maintain individual implementations for each data source enhancement
This methods advantage over previous CMOD method is that ,in CMOD a single include will contain all the ABAP coding (this will create problem in marinating the versions for developers).specially while you are transporting the CMOD code to test and prod systems.
With the new BADI method you can avoid this problem as individual implementations can be transported independently without creating conflicts.
Thanks and Regards
Arun