On Thu, Nov 9, 2017 at 3:47 AM, Amit Kapila <amit.kapil...@gmail.com> wrote:
> I think I understood your concern after some offlist discussion and it
> is primarily due to the inheritance related check which can skip the
> generation of gather paths when it shouldn't.  So what might fit
> better here is a straight check on the number of base rels such that
> allow generating gather path in set_rel_pathlist, if there are
> multiple baserels involved.  I have used all_baserels which I think
> will work better for this purpose.

Yes, that looks a lot more likely to be correct.

Let's see what Tom thinks.

Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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