Custom Extractor using FM for Delta Upload

Question

Hi,
I created a Custom Extractor using FM for Full Upload. The requirement now is that it should be able to handle Delta also.
I used the standard FM RSAX_BIW_GET_DATA_SIMPLE to create my Z FM.
Please suggest me the changes I have to make in this to be able to upload Delta also.
Thanks
Nageswara

Answer 1

Hi Mahesh,
You can selectively load from BI side (through Infopackage) and for that you should have those selection field defined as ranges in your FM.
As per my genius friend Sidharth Gupta:
FM RSAX_BIW_GET_DATA_SIMPLE is a funct. Mod having a simple interface in which I_UPDMODE is not used. Actually FM RSAX_BIW_GET_DATA_SIMPLE is used for a full update and uses an F2 extraction method. However through ABAP we can try to make it delta capable like below.
*Declare
DATA  I_UPDMODE.
Now to capture delta on AUDAT
       I_UPDMODE = u2018 u2018.
LOOP AT S_S_IF-T_SELECT INTO L_S_SELECT WHERE FIELDNM = 'AUDAT'.
            MOVE-CORRESPONDING L_S_SELECT TO L_R_AUDAT.
             I_UPDMODE = u2018 D u2019.
            APPEND L_R_AUDAT.
          ENDLOOP.
This code works however is not flexible as you do not use a CASE stmt on I_UPDMODE.
CASE stmt gives more flexibility which is used in FM RSAX_BIW_GET_DATA.
FM RSAX_BIW_GET_DATA is a funct. Mod having a complete interface in which I_UPDMODE is passed to funct mod during its call.FM RSAX_BIW_GET_DATA can be  used for all update types and uses an F1 extraction method. However after writing the funct mod the default extraction method is F2 in table ROOSOURCE which needs to b changed to F1 for ur mod to work.  This change from F2 to F1 can be done via test abap code.
Part two of that Article is yet to be published so wait for sometime or follow above mentioned approach.
Hope it helps.
Regards,
Ashish