On Mon, May 7, 2018 at 11:34 PM, Amit Kapila <amit.kapil...@gmail.com> wrote: > Is this correct? See below example:
That's not a counterexample to what I wrote. When parallelism is used, the InitPlan has to be attached to a parallel-restricted node, and it is: Gather. It's true that in the serial plan it's attached to the Seq Scan, but that doesn't prove anything. Saying that something is parallel-restricted is a statement about where parallelism can be used; it says nothing about what happens without parallelism. > I think we can cover InitPlan and Subplans that can be parallelized in > a separate section "Parallel Subplans" or some other heading. I think > as of now we have enabled parallel subplans and initplans in a > limited, but useful cases (as per TPC-H benchmark) and it might be > good to cover them in a separate section. I can come up with an > initial patch (or I can review it if you write the patch) if you and > or others think that makes sense. We could go that way, but what I wrote is short and -- I think -- accurate. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
