Hi Sonam,
Update rules specify how the data (key figures, time characteristics, characteristics) is updated into the InfoProvider from the communication structure of an InfoSource.
You use routines to define complex update rules for a key figure or characteristic.Start routines are used in Transfer rules and update rules, this abap code is executed before starting the load and used in scenarios where we want to perform some operations on all the data example deleting some records before processing records in Update rules or transfer rules.
Example Scenarios can be :
1. You need to delete a selected number of records within the data package based upon a particular pattern that the records being loaded have.
2. Populate a field based upon values of other fields being passed in the load process.
3. Derive an additional field for the target record structure
Hope this helps.
Revert back for any Queries.
Regards
Hemant Khemani
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