Oracle-L: Complex Integrity Checking

From: <Iulian.ILIES_at_orange.ro>
Date: Tue, 04 Jun 2002 05:58:30 -0800
Message-ID: <F001.0047356D.20020604055830@fatcity.com>

Hi guys. Here's my problem.
I want to check the new values (when inserting&updating a table) against the ones in the existing rows. Something like checking for duplicate values, but using a unique constraint doesn't suit my needs. I think of a before insert&update trigger, wherein checking my condition and raise a error if not valid. The problem is, in case of an update statement, I get the mutating "ORA-04091 table <my table> is mutating....". I read a lot of doc but I didn't find any helping ideas. Can you give me some, or maybe a new approach to this kind of problem? Thanks in advance!

iulian

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