Horton

Re: fix cost subqueryscan wrong parallel cost

Robert Haas <robertmhaas@gmail.com>

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From: Robert Haas <robertmhaas@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: "David G. Johnston" <david.g.johnston@gmail.com>, Richard Guo <guofenglinux@gmail.com>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2022-05-03T18:37:22Z
Lists: pgsql-hackers 
On Tue, May 3, 2022 at 2:13 PM Tom Lane <tgl@sss.pgh.pa.us> wrote:
> In any case, fundamental redesign of what EXPLAIN prints is a job
> for v16 or later.  Are you okay with the proposed patch as a v15 fix?

Yes. I can't really vouch for it, but I don't object to it.

-- 
Robert Haas
EDB: http://www.enterprisedb.com

Commits

  1. Fix rowcount estimate for SubqueryScan that's under a Gather.

  2. Optimize order of GROUP BY keys