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From: David G. Johnston <[email protected]>
To: Nikolay Samokhvalov <[email protected]>
Cc: Bruce Momjian <[email protected]>
Cc: Laurenz Albe <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: [PATCH] Doc: clarify that pg_upgrade statistics transfer works cross-version
Date: Wed, 25 Mar 2026 19:33:42 -0700
Message-ID: <CAKFQuwYmspFfkno8Xf_RL4C5AQFDgvSXRcg5kmofrRy=cz88jw@mail.gmail.com> (raw)
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References: <CAM527d_Qt9ZGt99vgTaidfObRiDH0R5F_uEfum9zHeZbc+LwCQ@mail.gmail.com>
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On Wednesday, March 25, 2026, Nikolay Samokhvalov <[email protected]> wrote:

>
> If you don't know anything about implementation, it is natural to
> expect that something new will work only when both old and new
> clusters support it.
>
>
But we don’t call out “new features” in the documentation.  Just
“features”.  And so when the pg_upgrade docs says “pg_upgrade supports
upgrades from 9.2.X and later” then unless there is a note to the contrary
(which there is not here) that applies to everything pg_upgrade does.

Put differently, read the docs as if you were unaware in which version that
capability was introduced.  This is the style/assumption the documentation
is written in/using.

David J.


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