X-Original-To: pgsql-interfaces@postgresql.org
Received: from spampd.localdomain (postgresql.org [64.49.215.8])
	by postgresql.org (Postfix) with ESMTP id 3E56347592C
	for <pgsql-interfaces@postgresql.org>;
	Tue,  1 Apr 2003 18:53:07 -0500 (EST)
Received: from sss.pgh.pa.us (unknown [192.204.191.242])
	by postgresql.org (Postfix) with ESMTP id 83B704758C9
	for <pgsql-interfaces@postgresql.org>;
	Tue,  1 Apr 2003 18:53:06 -0500 (EST)
Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1])
	by sss.pgh.pa.us (8.12.9/8.12.9) with ESMTP id h31Nr82L002181;
	Tue, 1 Apr 2003 18:53:08 -0500 (EST)
To: ljb <lbayuk@mindspring.com>
Cc: pgsql-interfaces@postgresql.org
Subject: Re: The new FE/BE protocol 
In-reply-to: <b6d7kc$23pd$2@news.hub.org> 
References: <1049238262.1568.9.camel@alice> <b6d7kc$23pd$2@news.hub.org>
Comments: In-reply-to ljb <lbayuk@mindspring.com>
	message dated "Tue, 01 Apr 2003 23:33:32 +0000"
Date: Tue, 01 Apr 2003 18:53:08 -0500
Message-ID: <2180.1049241188@sss.pgh.pa.us>
From: Tom Lane <tgl@sss.pgh.pa.us>
X-Spam-Status: No, hits=-29.3 required=5.0
	tests=BAYES_01,EMAIL_ATTRIBUTION,IN_REP_TO,REFERENCES,
	REPLY_WITH_QUOTES autolearn=ham	version=2.50
X-Spam-Level: 
X-Spam-Checker-Version: SpamAssassin 2.50 (1.173-2003-02-20-exp)
X-Archive-Number: 200304/9
X-Sequence-Number: 3948

ljb <lbayuk@mindspring.com> writes:
> I second this, as my Tcl driver also depends on the protocol. Can we also
> be reassured about compatibility (e.g. new backend will still talk to old
> clients)?

Yes.

The contents (layout and spelling) of error messages are likely to
change, which could break frontends that test for specific messages
--- but I'd opine any such frontends are already broken by message
internationalization.  Otherwise, an old client should see no change.

			regards, tom lane