What part of the description is difficult to understand? I put it there rather concise, maybe not very clear.

You put whether or not you close the SessionFactory in the description?

It is documented as serving two purposes, one of them being a key. That I suspect to be sub optimal and having a minimal specialized key could be an easy solution of the problem. Yet, I may be missing things, I am new to this code base and that's why I am asking.

sub-optimal how? I mean it is sub-optimal in that if we just used the query String it would be faster and use less memory - if you can live with things just being wrong.

You realize a "query plan" is partially how the ResultSets are processed right? And you realize that the same query can be processed in a number of ways right? So I'm not understanding why its hard to see why just using the query String is not enough