Horton

Re: pgsql: libpq: Grease the protocol by default

Jacob Champion <jacob.champion@enterprisedb.com>

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From: Jacob Champion <jacob.champion@enterprisedb.com>
To: Nathan Bossart <nathandbossart@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Jelte Fennema-Nio <postgres@jeltef.nl>, pgsql-hackers@lists.postgresql.org, Andrew Dunstan <andrew@dunslane.net>
Date: 2026-02-24T17:27:52Z
Lists: pgsql-hackers 
On Tue, Feb 24, 2026 at 8:17 AM Nathan Bossart <nathandbossart@gmail.com> wrote:
> Granted, this probably doesn't help the present issue...

Yeah, we'd need to go all the way to PG11 to avoid it entirely. But
that's okay -- finding and fixing this now means that we don't have to
relitigate it when bumping the default version later (or when
releasing production-grade grease). If PG10 ages out before we finally
decide to do either one, fine.

--Jacob

Commits

  1. pg_upgrade: Use max_protocol_version=3.0 for older servers

  2. libpq: Grease the protocol by default

  3. libpq: Prepare for protocol grease during 19beta