Hi,
We are trying to do data transformation using SDI flowgraphs and we are looking for some inputs to handle some use cases in the right way.
1. How to handle conditional transformations? If a column in Source table has value 'a' then the value in target table should be 1 and if the value is 'b' the value in target should be 2, etc. Basically we are not sure on how to handle where we have to have transformations based in if-else or case statements.
2. If we have to join multiple tables, is there any difference in using multiple join nodes instead of adding multiple tables to a single join node? Will both will be optimized by Hana of will there be any performance difference? What happens behind the scenes for both of these scenarios?
3. How to handle record level error logging? For example, if I have 10 records and 2 of them are failing due to some constraint violation in the target table, I would like the 8 records to go to target tables and the 2 records to be logged in an error table with the errors instead of stopping the entire task with no record moving to target table
4. What is the best way to debug issues in flowgraphs? I couldn't find any material in this regard.
Appreciate your response.
Thanks
Chandru