Hi Christoph,
In order to confirm that Exception Aggregation is pushed down to HANA, I used the "Execute and Explain" option in RSRT. When you use this option you can use it to test whether Exception Aggregation is executed in HANA (last checkbox).
I have also tested the different HANA ops options (0, 3 and 6) and I must admit that the numbers I saw for DBTRANS event, were not the numbers I was expecting...
However, I haven't proceeded with this analysis.
I just used the "Execute and explain" to assure that it was pushed down to HANA.
Regards,
Stefan