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Re: Deferrable UNIQUE INDEX?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Andrew Dunstan" <andrew(at)dunslane(dot)net>
Cc: david(at)fetter(dot)org, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Deferrable UNIQUE INDEX?
Date: 2006-01-04 04:17:16
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
"Andrew Dunstan" <andrew(at)dunslane(dot)net> writes:
> David Fetter said:
>> Is there some way to make the index check INITIALLY DEFERRABLE the way
>> a regular column/table constraint could be?

> The TODO list has: "Allow DEFERRABLE UNIQUE constraints?"
> send in a patch ;-)

This is definitely on the wish-list, because it is both useful and
required by the SQL spec ... but it seems nontrivial.  I recall
some discussions in the pghackers archives about how to do it.

			regards, tom lane

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