Horton

Re: pgsql: libpq: Grease the protocol by default

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Jacob Champion <jacob.champion@enterprisedb.com>
Cc: Andrew Dunstan <andrew@dunslane.net>, Jelte Fennema-Nio <postgres@jeltef.nl>, pgsql-hackers@lists.postgresql.org
Date: 2026-02-24T23:30:35Z
Lists: pgsql-hackers 
Jacob Champion <jacob.champion@enterprisedb.com> writes:
> On Tue, Feb 24, 2026 at 2:49 PM Andrew Dunstan <andrew@dunslane.net> wrote:
>> Here's what worked for me, even before Jacob's patch of 15 minutes or so
>> ago.

> Oh, the envvar is clever. You'll probably want to do that only for the
> pg_dumpall invocation now that pg_upgrade is patched, though, so we
> don't cover up regressions.

I agree with Jacob on both points.

			regards, tom lane

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