Hi Nehal,
unfortunately this coding won't work.
Problem is that you are accessing the table cluster rather than the tables within the cluster (so a DELETE on BSEG would have worked and will continue to work as before, but the access to RFBLG won't work the same after the migration).
But "help is near", you'll be informed by the code inspector respectively the ATC when running the global check variant FUNCTIONAL_DB (see e.g. ABAP Test Cockpit and Code Inspector in Context of HANA Migration - SQL Performance Monitoring - SAP Library or SAP Note 1912445).
So you'll have to adapt, but you'll also be informed to do so 
.
Best,
Jasmin