On Sun, Nov 20, 2016 at 10:43 PM, Andreas Seltenreich <seltenre...@gmx.de> wrote: > Hi, > > the query below triggers a parallel worker assertion for me when run on > the regression database of master as of 0832f2d. The plan sports a > couple of InitPlan nodes below Gather. >
I think the reason of this issue is that in some cases where subplan is at some node other than top_plan node, we allow them to be executed in the worker in force_parallel_mode. It seems to me that the problematic code is below check in standard_planner() if (force_parallel_mode != FORCE_PARALLEL_OFF && best_path->parallel_safe && top_plan->initPlan == NIL) Here instead of checking whether top_plan has initPlan, it should check whether initPlan is present anywhere in plan tree. I think one simple way could be to check *glob->subplans* instead of top_plan->initPlan, another possibility is to traverse the whole tree to see if initPlan is present. -- With Regards, Amit Kapila. EnterpriseDB: http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
