Re:

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: claus(dot)pruefer(at)webcodex(dot)de
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re:
Date: 2006-06-01 14:12:21
Message-ID: 20060601141221.GC18513@surnet.cl
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claus(dot)pruefer(at)webcodex(dot)de wrote:

> and a UNIQUE INDEX on columns "groupid,orderby"
>
> now i want to update
>
> UPDATE
> orderby SET orderby = orderby +10
> WHERE groupid = 1;
>
> -> FAILS because of UNIQUE INDEX

This is a Known Issue(tm). (A "gotcha", some would say).

http://archives.postgresql.org/pgsql-sql/2004-10/msg00146.php
Surely you can find better references in the archives, but I'm too lazy.
(keywords: "deferrable unique constraint")

--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.

In response to

  • at 2006-05-31 16:54:04 from claus.pruefer

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