I asked a while ago in this group about the possibility to implement a parallel planner in a multithread way, and the replies were that the proposed approach couldn't be implemented, because the postgres is not thread-safe. With the new feature Background Worker Processes, such implementation would be possible? If yes, do you can see possible problems in implement this approach, for example, the bgprocess can't access some planning core functions like make_join_rel, acess them in parallel and so on. I want start a research to work in a parallel planner in postgres, I succeeded in in the DBMS H2, but my first option still is the postgres, and any help is welcome.
Att,
Fred
