ABAP code to enhance a standard data source

Question

Hi BW experts,
I am a novice in BW and I need to append a standard datasource <b>0DAT_SRC</b> with a field <b>FLD1</b> from table <b>TABL1</b>.Extract structure: <b>EX0001</b>.
Can anybody please suggest how this can be done?I guess it requires some ABAP coding to be done in the conversion exits.
<b><i>Many,many thanks in advance!!</i></b>

Answer 1

Following are the steps to enhance Standard Data source.
1. goto tc RSA6.
2. Select the Data Source which you want to enhance.
3. Select display Data Source (Ctr+f2)
4. Double click on the Extract structure.
5. click on the Append Structure.
6. Add the required fieds starting with ZZ*.
7. Avtivate the Append Structure.
To populate the data into this field you must have a project created to access the FM 'EXIT_SAPLRSAP_001'.
to Create Project code goto tcode: CMOD
1. Enter the Project name and click on create
2. go to components select the required function module.
EXIT_SAPLRSAP_001 for Transactional DS (RSR000
EXIT_SAPLRSAP_002 for Master DS
Goto SE37 and enter the Respective Function module (ex . EXIT_SAPLRSAP_001) and click on the include zxxxxx. then write the code to populate the extra fields added to the DS.
Sample code:
CASE i_datasource.
WHEN '2LIS_11_VAITM'.
loop at c_t_data into work_ar.
do some selections, some calculations ....
append work_ar to c_t_data. " add a new record
modify c_t_data from wa. " change the existing record
endloop.
endcase.