Hi Quiros,
As I see, only one object is added to Join_5 node, which might be causing the issue. Two objects are required for a join node.
If you want a simple select on the row table OSRQ, then you can go with Calculation view - add a projection, add table OSQR to that and connect it to output. Calculation views can be build on row tables as well. But it is recommended to have the table as a column table in SAP HANA for analysis purposes.
Regards
Chandra