Thanks for the reply, but I'm not sure I follow what you're suggesting. Where in HANA studio do you see the output of the hierarchy? In data preview of the analytic view, there doesn't seem to be a place to use it.
As for the composite/foreign keys in the tables, these are the SETLEAF and SETNODE tables imported from ECC via SLT, so yes - they have composite keys. See this thread for more information on the relationships: Load profit center hierarchy into HANA