Invoice Recipt document for Purchase order

Question

Dear Gurus,
I have a requirement to extract Invoice Recipt Document number & Invoice date for every purchase order into BW.
I know that For purchase order details we used 2 datasources 1. ) 2LIS_02_SCL & 2.) 2LIS_02_ITM. Both the datasource do not have Material document number (BELNR) field. But these datasource read data from EKKO, EKPO & EKBE table and material document number field is availble in EKBE.
I also know that this field along with PO purchase order category (BEWTP)= 'Q' we can get the invoice document no. But I am not sure if we can enhance this 'Material document number' field to datsources 2LIS_02_SCL & 2LIS_02_ITM.
If we can, should the field be apended to both the datasource or can this requirement be facilitated by appending to any one of the datasource. Not sure about this. Can somebody help me or guide with how to proceed with this requirement.
Thanks in advance,
Sandeep.

Answer 1

Hi Sandeep,
I have not worked on this datasource but yes technically you can do it.
As I understand, 2LIS_02_SCL is for header details of PO and PO has one to one relationship with Material Doc number.
Therefore, if you requirement is to only bring in the header details for this Material doc, only enhance this datasource.
Append this field to the datasource, then write the customer exit for this datasource.
In this customer exit, you can write your code for deriving the Material doc number from EKBE based on the details available in e_t_data (for this datasource).
But, if your requirement is to fetch line item details as well, you need to append the other datasource as well. And by writing the exit you can again derive the details from the table.
Please note that the appended fields cannot be used to trigger any deltas, so if your requirement includes to trigger the delta if your material document changes, it cannot be done.
Hope this helps.