Hi,
Check if the fields that fulfill your request exist as part of Standard data source ? If there are no fields then follow the below steps.
- First Append the fields that you want to enhance from BSEG table to the data source extract structure.
- implement ABAP logic in CMOD to populate the values to the enhanced fields
- RSA6 --> edit data source --> Unhide the enhanced fields and save.
Regards
KP