Re: Can I CONSTRAIN a particular value to be UNIQUE?

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От G. Anthony Reina
Тема Re: Can I CONSTRAIN a particular value to be UNIQUE?
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Msg-id 3C069F04.50FC3BFD@nsi.edu
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Ответ на Re: Can I CONSTRAIN a particular value to be UNIQUE?  (Stephan Szabo <sszabo@megazone23.bigpanda.com>)
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Stephan Szabo wrote:

> Not really within what we provide (theoretically you could probably do
> it with a subselect in check I think). You'll probably will want to look
> at writing a plpgsql trigger to do the check.

Yes, I was hoping that something like CHECK or perhaps a RULE would work,
but it appears that the easiest way may be using an external program.

Thanks Stephan.
-Tony




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