claus.pruefer@webcodex.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.