Maintaining the mapping information and writing update routine to populate

Question

Hi,
Its my requriment to get the transactional data from r/3, here in the transaction data i will get the data in following format
(for example)
Material no.   Sales value    quantity ..
M001              100           2
M002              200           4
M003              150           3
now my requirement is to take the quantity per material number and multiply it with a factor called as SBU factor
.. my problem is that this SBU factor is not maintained in r/3 means the mapping information of material no. with its relative SBU factor is not maintained. So i thought of two option as this mapping is fixed means it will not changed so we can maintain in bw system through 1) one time upload of flat file or
2) maintaning a table in BW with mapping
so users agreed to give the mapping information as follows
Material no.    SBU factor
M001              5
M002              10
M003              7
now while uplading the transational data i need to take the SBU factor per material that is maintained through flat file or table and multiply it with quantity and store it quantity.
for example(the result i need in cube)
material no.   sales value    quantity(quantity * SBU)
M001             100           2*5=10
M002             200           4*10=40
M003             150           3*7=21
so i can do this at two level at transfer rules or update rules.
I need following clarification
1) shall i load the mapping information through flat file or maintain it in table?
2) If i will do the transformation at update rules so wht routine (start or update) should i write to get the SBU factor per material and do transformations
If possible send the sample routine.
Pls reply ASAP.
Thanks
Saleem.

Answer 1

Hi Saleem,
Nimesh is right..Do the multiplication in the Update rules.
If the data for this SBU factor is less and is always fixed, you can go for one time upload, else set up a RFC Call to load this data to BW from R/3 if no datasource for the same exist.
Else you can also maintain a table in BW, in which one time upload could be done by writing an ABAP, or manually. And then you can provide authorizsation to add more values to it, so that the table can be maintained.
And then in Update rules, use the table for look up and get the SBU Factor per material.
Some thing like
Select * from the <ODS table or Table name> into <internal table>
Loop at Data_Package.
Read table <internal table> for all values in Data_Package where internal table-Material = Data_package-MAterial.
If sy-subrc = 0.
Sales Value = Sales Value * internal table-SBU Factor.
ENDIF.
MODIFY DATA_PACKAGE.
ENDLOOP.
You might need to make more changes to this code as required.
Assign points if useful
Regards
Rohit