Re: Statistics Import and Export

From: Jeff Davis <pgsql(at)j-davis(dot)com>
To: Corey Huinker <corey(dot)huinker(at)gmail(dot)com>
Cc: Bruce Momjian <bruce(at)momjian(dot)us>, jian he <jian(dot)universality(at)gmail(dot)com>, Matthias van de Meent <boekewurm+postgres(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Nathan Bossart <nathandbossart(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: 2024-12-07 19:27:51
Message-ID: c2bc08dfec336c03f7a7165d1347e2b52cf98b17.camel@j-davis.com
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On Tue, 2024-11-26 at 17:11 -0500, Corey Huinker wrote:
>
> > * Why does binary upgrade cause statistics to be dumped? Can you
> > just
> > make pg_upgrade specify the appropriate set of flags?
> >
>
>
> That decision goes back a ways, I tried to dig in the archives last
> night but I was getting a Server Error on postgresql.org.

I suggest that pg_upgrade be changed to pass --no-data to pg_dump,
rather than --schema-only.

That way, you don't need to create a special case for the pg_dump
default that depends on whether it's a binary upgrade or not.

If wanted, there could also be a new option to pg_upgrade to specify --
with-statistics (default, passes --no-data to pg_dump) or --no-
statistics (passes --schema-only to pg_dump). But that option is
probably not necessary; everyone upgrading probably wants the stats.

Regards,
Jeff Davis

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