From: Bruce Momjian <pgman@candle.pha.pa.us>
Message-Id: <200303120202.h2C226U05386@candle.pha.pa.us>
Subject: Re: [INTERFACES] Roadmap for FE/BE protocol redesign
In-Reply-To: <20030311211526.H72192@hub.org>
To: "Marc G. Fournier" <scrappy@hub.org>
Date: Tue, 11 Mar 2003 21:02:06 -0500 (EST)
Cc: Tom Lane <tgl@sss.pgh.pa.us>, pgsql-hackers@postgresql.org,
	pgsql-interfaces@postgresql.org
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Marc G. Fournier wrote:
> On Mon, 10 Mar 2003, Tom Lane wrote:
> 
> > One of the $64 questions that has to be answered is how much work we're
> > willing to expend on backwards compatibility.  The path of least
> > resistance would be to handle it the same way we've done protocol
> > revisions in the past: the backend will be able to handle both old and
> > new protocols (so it can talk to old clients) but libpq would be revised
> > to speak only the new protocol (so new/recompiled clients couldn't talk
> > to old backends).  We've gotten away with this approach in the past, but
> > the last time was release 6.4.  I fully expect to hear more complaints
> > now.
> 
> Personally ... as long as a v8.x client can talk to a v7.x backend, you
> have my vote ... I'm more apt to upgrade my clients before my servers
> anyway ...

Actually, it is usually the opposite, where old clients can talk to
newer servers, but not the reverse.

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