From: Christoph Dalitz <christoph(dot)dalitz(at)hs-niederrhein(dot)de>
To: batistellabr(at)yahoo(dot)com(dot)br
Cc: pgsql-general(at)postgresql(dot)org
Subject:
Date: 2002-07-16 18:11:35
Message-ID: 20020716201135.4730bae2.christoph.dalitz@hs-niederrhein.de
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> I would like to make the following constraint in my db.
>
> [...]
>
> Is it possible?
> How can I do that?
>
It is possible to impose arbitrarily complex constraints
with TRIGGERs.

The idea is to raise an exception in the trigger body
when illegal values are inserted or updated.

Christoph Dalitz

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