Enhancing 0MATERIAL_ATTR?Writing Start routine in Transfr rules in BW side?

Question

Hi All,
I got a requirement of enhancing the 0MATERIAL_ATTR extract structure with 10 fields.
The logic is written in R3 extraction User exit ZXRSAU02 for populating the data from MARA table.
In the BW side also, the corresponding objects created & mapped in Communication & Transfer structure, the update rules also activated for 0MATERIAL_ATTR.
Details:
The DS is: 0MATERIAL_ATTR
ES is: BIW_MARA_S
Table is: MARA
Enhanced fields in ES are: like ZR, ZR1, ZR2 to ZR9.
BW Objects created are: like ZB, ZB1, ZB2 to ZB9.
I need help in writing start routine in transfer rules:
The below logic needs to be included in the start routine -
--->" If the following fields in extractor are all blank then populate them all with the value in ZR, ZR1, ZR2 to ZR9.
---> If the above are not all blank then don't modify. These will update as per the Transfer rules."
Please help in writing the code for the Logic mentioned above.
Thanks in Advance.

Answer 1

Hi,
as suggested you can do this in ZXRSAU02 or in the start routine
In the start routine
data wa_datapak type TRANSFER_STRUCTURE .
data l_tabix like sy-tabix.
loop at datapak into wa_datapak .
l_tabix = sy-tabix .
if wa_datapak-zr is initial or wa_datapak-zr1 is initial -
wa_datapak-zr9 is initial .
clear  : wa_datapak-zr. -- clear : wa_datapak-zr9 .
modify datapack from wa_datapack index l_tabix.
endloop.
hope this helps
PV