On 1/10/14, 6:51 PM, Peter Geoghegan wrote:
On Fri, Jan 10, 2014 at 4:09 PM, Jim Nasby<j...@nasby.net> wrote:
>Well, the usual example for exclusion constraints is resource scheduling
>(ie: scheduling what room a class will be held in). In that context is it
>hard to believe that you might want to MERGE a set of new classroom
>assignments in?
So you schedule a class that clashes with 3 other classes, and you
want to update all 3 rows/classes with details from your one row
proposed for insertion?
Nuts, I was misunderstanding the scenario. I thought this was simply going to
violate exclusion constraints.
I see what you're saying now, and I'm not coming up with a scenario either.
Perhaps Jeff Davis could, since he created them... if he can't then I'd say
we're safe ignoring that aspect.
--
Jim C. Nasby, Data Architect j...@nasby.net
512.569.9461 (cell) http://jim.nasby.net
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