A. Kretschmer <andreas.kretschmer@schollglas.com> schrieb:

> am 18.02.2006, um 10:03:11 +0100 mailte Pailloncy Jean-Gerard folgendes:
> > Hi,
> >
> > I wonder how to have a sort of "uniq" index on date interval, such that
> > there is no date interval overlaping in the table.
> >
> > exemple:
> > create table test (start timestamp, end timestamp);
> > with the constraint: end > start
>
> You can write a trigger to check the count of records which overlaps
> (start,end):

Sorry, there are a problem:

the trigger can't see uncommitted inserts from concurrent transactions.

Thanks to AndrewSN for this hint.



Andreas
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