| From: | Jeff Davis <pgsql(at)j-davis(dot)com> |
|---|---|
| To: | Corey Huinker <corey(dot)huinker(at)gmail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andres Freund <andres(at)anarazel(dot)de>, 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: | 2025-02-26 00:17:37 |
| Message-ID: | cee2e3e75cbfb4447fd30faeac159aef8ea6effc.camel@j-davis.com |
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| Lists: | pgsql-hackers |
On Tue, 2025-02-25 at 15:31 -0500, Corey Huinker wrote:
> Documentation:
>
> + The currently-supported relation statistics are
> + <literal>relpages</literal> with a value of type
> + <type>integer</type>, <literal>reltuples</literal> with a
> value of
> + type <type>real</type>, and
> <literal>relallvisible</literal> with a
> + value of type <type>integer</type>.
>
> Could we make this a bullet-list? Same for the required attribute
> stats and optional attribute stats. I think it would be more eye-
> catching and useful to people skimming to recall the name of a
> parameter, which is probably what most people will do after they've
> read it once to get the core concepts.
I couldn't make that look quite right. These functions are mostly for
use by pg_dump, and while documentation is necessary, I don't think we
should go so far as to make it "eye-catching". At least not until
things settle a bit.
> Question:
>
> Do we want to re-compact the oids we consumed in pg_proc.dat?
Done.
> Specifically missing are:
>
> * regclass not found
> * attribute is system column
> * scalars can't have mcelem
> * mcelem / mcelem freqs mismatch (parts 1 and 2)
> * scalars can't have elem_count_histogram
> * cannot set most_common_elems for range type
Done.
And committed.
Regards,
Jeff Davis
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