From: Andreas <maps.on@gmx.net>
To: pgsql-sql@postgresql.org
Subject: How to reject overlapping timespans?
Date: Sun, 17 Feb 2013 18:02:27 +0100
Message-ID: <51210D23.9070403@gmx.net> (raw)
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Hi,
I need to store data that has a valid timespan with start and enddate.
objects ( id, name, ... )
object_data ( object_id referencs objects(id), startdate, enddate, ... )
nothing special, yet
How can I have PG reject a data record where the new start- or enddate
lies between the start- or enddate of another record regarding the same
object_id?
Also it isn't allowed that such timespans lie within another.
There can be times where no valid data exists but there can't be more
than one valid data-record for the same point in time.
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To: pgsql-sql@postgresql.org
Cc: maps.on@gmx.net
Subject: Re: How to reject overlapping timespans?
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