| From: | Craig Ringer <craig(at)2ndquadrant(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Peter Eisentraut <peter_e(at)gmx(dot)net>, Magnus Hagander <magnus(at)hagander(dot)net>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: protocol version negotiation (Re: Libpq PGRES_COPY_BOTH - version compatibility) |
| Date: | 2017-06-29 04:24:44 |
| Message-ID: | CAMsr+YEfJjqLd8mJYMyTWeMia-TYLUi0-c=OPBTeni=2b5eX7w@mail.gmail.com |
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| Lists: | pgsql-hackers |
On 29 June 2017 at 12:23, Craig Ringer <craig(at)2ndquadrant(dot)com> wrote:
> It does. But I don't see anywhere that extra round trips have been discussed.
Ah, right, they're implied by having the server respond with some
downversion message and ignore input until the client sends a new
startup message. That'll only happen when a too-new client connects to
an older server, but that's probably not an especially unusual case.
--
Craig Ringer http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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