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From: Laurenz Albe <[email protected]>
To: Andrey Borodin <[email protected]>
To: Matthias van de Meent <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: Online PostgreSQL version() updates
Date: Wed, 01 Apr 2026 14:47:19 +0200
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <CAEze2WjgxD-uZrjiD7Gtp2gy=ztAOTU+xyLNJg6saYG4erP_=w@mail.gmail.com>
	<[email protected]>

On Wed, 2026-04-01 at 17:01 +0500, Andrey Borodin wrote:
> 
> > On 1 Apr 2026, at 15:48, Matthias van de Meent <[email protected]> wrote:
> > 
> > Attached is a patch that allows superusers to update the version() of
> > their running system with a simple SQL call: SELECT
> > pg_update_version(version_num, 'version_short', 'the full version()
> > outout')
> 
> While I find this proposal very useful, I think the interface can be improved.
> 
> Consider SELECT pg_update_version(commit_hash) so we can do stuff like
> SELECT pg_update_version('REL_18_2') or SELECT pg_update_version('HEAD~10000').
> In future we can even create a bisect facility, so when user encounters a bug
> in their production they can iterate over several commits to trace root cause.

I don't think that has to go into the first release; perhaps such functionality
can be added later.

But the patch, as it is, is missing something important: the "internal" parameters
"server_version" and "server_version_num" need to reflect the changed version.

Yours,
Laurenz Albe

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