| From: | Corey Huinker <corey(dot)huinker(at)gmail(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Jeff Davis <pgsql(at)j-davis(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Michael Paquier <michael(at)paquier(dot)xyz>, jian he <jian(dot)universality(at)gmail(dot)com>, Nathan Bossart <nathandbossart(at)gmail(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, Matthias van de Meent <boekewurm+postgres(at)gmail(dot)com>, Magnus Hagander <magnus(at)hagander(dot)net>, Stephen Frost <sfrost(at)snowman(dot)net>, Ashutosh Bapat <ashutosh(dot)bapat(dot)oss(at)gmail(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, alvherre(at)alvh(dot)no-ip(dot)org |
| Subject: | Re: Statistics Import and Export |
| Date: | 2025-03-06 01:30:48 |
| Message-ID: | CADkLM=cGZ2y7h_0d=vBLxSJ=quuD-XozYvEcb4xkYcRLvxbxNw@mail.gmail.com |
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| Lists: | pgsql-hackers |
>
> One fairly easy win would be to stop issuing getAttributeStats() for
> non-expression indexes. In most cases that'll already drastically cut down
> on
> the extra queries.
That does seem like an easy win, especially since we're already using
indexprs for some filters. I am concerned that, down the road, if we ever
start storing non-expression stats for, say, partial indexes, we would
overlook that a corresponding change needed to happen in pg_dump. If you
can think of any safeguards we can create for that, I'm listening.
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