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In-Reply-To: <aC9Bz-bGPAoB3shj@nathan>
From: Hari Krishna Sunder <hari.db.pg@gmail.com>
Date: Thu, 22 May 2025 12:25:29 -0700
Message-ID: 
 <CAAeiqZ1Ov0bsM0KNomzinkvovRM_V12h7keg513gpUwfYwfj0Q@mail.gmail.com>
Subject: Re: Statistics Import and Export
To: Nathan Bossart <nathandbossart@gmail.com>
Cc: Jeff Davis <pgsql@j-davis.com>, Corey Huinker <corey.huinker@gmail.com>,
	Robert Treat <rob@xzilla.net>, Robert Haas <robertmhaas@gmail.com>,
	Andres Freund <andres@anarazel.de>, Tom Lane <tgl@sss.pgh.pa.us>,
	Michael Paquier <michael@paquier.xyz>, jian he <jian.universality@gmail.com>,
	Bruce Momjian <bruce@momjian.us>,
 Matthias van de Meent <boekewurm+postgres@gmail.com>,
	Magnus Hagander <magnus@hagander.net>, Stephen Frost <sfrost@snowman.net>,
	Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>,
 Peter Smith <smithpb2250@gmail.com>,
	PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>,
 alvherre@alvh.no-ip.org
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Thanks for the help. This has unblocked us!

On Thu, May 22, 2025 at 8:25=E2=80=AFAM Nathan Bossart <nathandbossart@gmai=
l.com>
wrote:

> On Wed, May 21, 2025 at 04:53:17PM -0700, Jeff Davis wrote:
> > On Wed, 2025-05-21 at 16:29 -0500, Nathan Bossart wrote:
> >> I don't know precisely where that line might be, but in this case,
> >> the
> >> dumped stats have no hope of restoring into anything older than
> >> v18... But I see no particular benefit from moving the complexity
> >> to the
> >> import side here.
> >
> > That's fine with me. Perhaps we should just say that pre-18 behavior
> > differences can be fixed up during export, and post-18 behavior
> > differences are fixed up during import?
>
> WFM.  I've committed the patch.
>
> --
> nathan
>

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<div dir=3D"ltr">Thanks for the help. This has unblocked us!</div><br><div =
class=3D"gmail_quote gmail_quote_container"><div dir=3D"ltr" class=3D"gmail=
_attr">On Thu, May 22, 2025 at 8:25=E2=80=AFAM Nathan Bossart &lt;<a href=
=3D"mailto:nathandbossart@gmail.com">nathandbossart@gmail.com</a>&gt; wrote=
:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.=
8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Wed, May 21=
, 2025 at 04:53:17PM -0700, Jeff Davis wrote:<br>
&gt; On Wed, 2025-05-21 at 16:29 -0500, Nathan Bossart wrote:<br>
&gt;&gt; I don&#39;t know precisely where that line might be, but in this c=
ase,<br>
&gt;&gt; the<br>
&gt;&gt; dumped stats have no hope of restoring into anything older than<br=
>
&gt;&gt; v18... But I see no particular benefit from moving the complexity<=
br>
&gt;&gt; to the<br>
&gt;&gt; import side here.<br>
&gt; <br>
&gt; That&#39;s fine with me. Perhaps we should just say that pre-18 behavi=
or<br>
&gt; differences can be fixed up during export, and post-18 behavior<br>
&gt; differences are fixed up during import?<br>
<br>
WFM.=C2=A0 I&#39;ve committed the patch.<br>
<br>
-- <br>
nathan<br>
</blockquote></div>

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