Hello,
I am guessing, but I have seen this in HR portal (ESS/ MSS) before:
You're not talking about a real query, right? (SQ01/02/03). You mean some "normal" functionality, is that possible? Could it be related to... performance management maybe?
In certain areas there are "alternative" or "supportive" concepts implemented, which you can't see in ST01 or PA20 etc. For example in case of performance management, there are "roles" defined in the PHAP_CATALOG (or what's the current name of the main transaction).
Cheers Otto