Re: generic plans and "initial" pruning - Mailing list pgsql-hackers

From Amit Langote
Subject Re: generic plans and "initial" pruning
Date
Msg-id CA+HiwqEa9W+eJKHXN9V++V_DBuKF_+Ji1j4+MYiAL2L287tU2Q@mail.gmail.com
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In response to Re: generic plans and "initial" pruning  (Amit Langote <amitlangote09@gmail.com>)
Responses Re: generic plans and "initial" pruning  (Amit Langote <amitlangote09@gmail.com>)
List pgsql-hackers
On Thu, Dec 1, 2022 at 9:43 PM Amit Langote <amitlangote09@gmail.com> wrote:
> On Thu, Dec 1, 2022 at 8:21 PM Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
> > On 2022-Dec-01, Amit Langote wrote:
> > > Hmm, how about keeping the [Merge]Append's parent relation's RT index
> > > in the PartitionPruneInfo and passing it down to
> > > ExecInitPartitionPruning() from ExecInit[Merge]Append() for
> > > cross-checking?  Both Append and MergeAppend already have a
> > > 'apprelids' field that we can save a copy of in the
> > > PartitionPruneInfo.  Tried that in the attached delta patch.
> >
> > Ah yeah, that sounds about what I was thinking.  I've merged that in and
> > pushed to github, which had a strange pg_upgrade failure on Windows
> > mentioning log files that were not captured by the CI tooling.  So I
> > pushed another one trying to grab those files, in case it wasn't an
> > one-off failure.  It's running now:
> >   https://cirrus-ci.com/task/5857239638999040
> >
> > If all goes well with this run, I'll get this 0001 pushed.
>
> Thanks for pushing 0001.
>
> Rebased 0002 attached.

Thought it might be good for PartitionPruneResult to also have
root_parent_relids that matches with the corresponding
PartitionPruneInfo.  ExecInitPartitionPruning() does a sanity check
that the root_parent_relids of a given pair of PartitionPrune{Info |
Result} match.

Posting the patch separately as the attached 0002, just in case you
might think that the extra cross-checking would be an overkill.

-- 
Thanks, Amit Langote
EDB: http://www.enterprisedb.com

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