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From: Saif Hakim <[email protected]>
To: Christoph Berg <[email protected]>
To: Saif Hakim <[email protected]>
To: [email protected]
Subject: Re: libpq 11.10 / 11.11 are not propertly released for bionic
Date: Sun, 14 Feb 2021 14:58:46 -0800
Message-ID: <CAHcM7L04BVsj4z0KatkCzwJWyvy_1jinz0VazDy5n7jMv7tumA@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <CAHcM7L13D4MAByVkMz35BKtfDQB2rTXP88hrFj5TLHfSm16F3w@mail.gmail.com>
	<[email protected]>

Hi Christoph,

> that is indeed stale, thanks for spotting that. The problem is present
> in the other distributions as well. I have now manually updated
> bionic-pgdg, but I will leave the other untouched until I can figure

Thanks!, I've confirmed that my repro no longer works and version 11 is
installed.

> That said, you shouldn't worry about libpq5 11 - using the 13 version
> from the "main" repository component is the recommended way.

For my own understanding, what are the ramifications of using the
non-"main" repository component / what are the differences?

I was also under the impression that since the version number tracks the
postgres release it is compatible with, that I should be choosing the
version that matches the version of postgres I'm running, i.e. since I'm
running Postgres 11, I should be using libpq5-11.xx. I'm primarily
installing libpq for python; however, taking a closer look at psycopg2 docs
(https://www.psycopg.org/docs/install.html#runtime-requirements), I see
that they are in agreement with what you're saying:

> Note: Whatever version of libpq psycopg2 is compiled with, it will
> be possible to connect to PostgreSQL servers of any supported
> version: just install the most recent libpq version or the most
> practical, without trying to match it to the version of the
> PostgreSQL server you will have to connect to.

Out of curiosity, if we were running libpq5-11 with Postgres 13, would we
see any issues or does postgres maintain backwards compatibility with these
libs as well?

Thanks again!

Best,
Saif

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