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From: Jacob Champion <[email protected]>
To: Tom Lane <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: PG20 Minimum Dependency Thread
Date: Thu, 18 Jun 2026 14:42:50 -0700
Message-ID: <CAOYmi+nqM3iH-huvAMkGhfG-JpZCUSB=wQPqAK-wxZjtBSmC_w@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <CAOYmi+nVsoMRFp4u0oQ66-oPT6+NNAfhLvk5htthY5zkUOnbfA@mail.gmail.com>
	<[email protected]>

On Thu, Jun 18, 2026 at 2:22 PM Tom Lane <[email protected]> wrote:
> FWIW, my impression of that thread was that we had agreed on pretty
> much everything except the value of N; if there was some later meeting
> that discussed it further, I wasn't there.

Cool.

> (hmm, I guess we didn't fill in $reasonable_timeframe, but that is
> probably going to be case-by-case anyway)

Sure. The first instance, if/when it happens, would probably be a trendsetter.

> It's too late to change anything for PG19, I think,

(right -- I didn't intend to propose a retroactive change, sorry for
any confusion)

> so it kind of doesn't
> matter today whether we set N to 2 or 3.

I think it still matters for impending decisions. For example, we're
about to engineer how to backport a sliding window of Python across
the sliding window of backbranch support. Shorter windows tie our
hands less.

But I agree that if that other thread is otherwise settled, we've
effectively declared that RHEL 9 is the minimum for PG20, and that
would make me very happy.

Thanks,
--Jacob

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