I think you are still working in HANA studio. You need to connect to the BW system and run the queries in SQL editor IN BW.
That will give you the required details. Also you need to grant the privileges to _SYS_REPO from the SQL window. If you have HANA system / admin access then you can connect to Studio using BW user id. But I guess you don't have it, otherwise you wouldn't have raised this question.
Ravi