Message-ID: <003701c0a29c$304b1a00$5a2b7ad8@expertrade.com>
Reply-To: "David Wall" <d.wall@computer.org>
From: "David Wall" <d.wall@computer.org>
To: "Max Khon" <fjoe@iclub.nsu.ru>, "Peter Mount" <peter@retep.org.uk>
Cc: <pgsql-interfaces@postgresql.org>
References: <017801c0a27c$4b0902a0$5a2b7ad8@expertrade.com>
	<5.0.2.1.0.20010301210608.0222ab40@mail.retep.org.uk>
Subject: Re: JDBC error codes to detect duplicates?
Date: Thu, 1 Mar 2001 14:08:47 -0800
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> >AFAIK clean implementation of such feature is not possible because
backend
> >protocol does not have error codes (only error messages)
>
> Thats correct. It's also not practical to get the driver to translate
> because the format of the messages can change between releases as well.

Practically speaking, how often do the messages really change between
releases?  It seems that we could create a pluggable translator that would
work based on the release version.  If the messages change too frequently,
then something's seriously wrong with Postgresql server since the main
sql-portion of the system has been in place and there aren't too many things
a program really needs to detect about a database (missing row, duplicate
key, constraint violation, transaction error, deadlock detected, etc.).

David