Re: libpq: Bump protocol version to version 3.2 at least until the first/second beta

On Thu Jan 15, 2026 at 1:31 AM CET, Jacob Champion wrote:
> Per offline confusion/discussion: I plan to work on a grease feature
> for beta _regardless_ of whether a "production-grade"
> max_protocol_version=grease option turns out to be viable before
> feature freeze;

I saw that you committed a few patches. Given that you said you wanted
to wordsmith the last one, this seemed like a good time to send in some
of my own improvements in that regard. (I did not change the GREASE
mentions, since you clearly had something in mind for those).

0001 is mine an your squash commit, squashed together and rebased on top of main.

0002 is the improvements to the docs. The one important thing is a
change from 3.2 to 3.0. Other than that it introduces a table for
tracking protocol extensions. That way other patches (like GoAway)
that introduce a protocol extension already have some location in
the docs where it can be listed.

0003-0005 are an attempt at making a bit more of a robust GREASE. 0003
makes it "harder to still implement negotation incorrectly". Then 0004
makes it not a hard failure if you connect with
max_protocol_version=grease to a new server. Then 0005 adds some
preliminary docs. These almost certainly need some more discussion. And
I don't expect them to necessarily get in for PG19, but if you like some
of it feel free to pick and take what you want from them. e.g. the
randomized protocol extensions are kinda nice IMO. But I'm not exactly
sure if the randomized version number is that much more useful though
than a fixed one.