Re: fixing consider_parallel for upper planner rels - Mailing list pgsql-hackers

From Tom Lane
Subject Re: fixing consider_parallel for upper planner rels
Date
Msg-id 29349.1467385743@sss.pgh.pa.us
Whole thread Raw
In response to Re: fixing consider_parallel for upper planner rels  (Robert Haas <robertmhaas@gmail.com>)
Responses Re: fixing consider_parallel for upper planner rels  (Robert Haas <robertmhaas@gmail.com>)
List pgsql-hackers
Robert Haas <robertmhaas@gmail.com> writes:
> On Thu, Jun 30, 2016 at 5:54 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> Don't have time to re-read this right now, but maybe tomorrow or
>> Saturday.

> OK, thanks.

There's still the extra-word problem here:

+     * If the input rel is marked consider_parallel and there's nothing
+     * that's not parallel-safe in the LIMIT clause, then the final_rel is
+     * can be marked consider_parallel as well.

Other than that, and the quibble over initialization of
parallelModeNeeded, I'm good with this.
        regards, tom lane



pgsql-hackers by date:

Previous
From: Tom Lane
Date:
Subject: Re: fixing consider_parallel for upper planner rels
Next
From: Robert Haas
Date:
Subject: Re: EXISTS clauses not being optimized in the face of 'one time pass' optimizable expressions