Thanks for the input. I don't insert into this table that often so I'll just prevent overlaps at the application level since I'm running 9.0.X and not really in a position to upgrade right now.
Thanks again, Wayne On Fri, Aug 03, 2012 at 11:50:13AM -0400, Jonathan S. Katz wrote: > On Aug 2, 2012, at 7:10 PM, Wayne Cuddy wrote: > > > I have a table with 3 columns: > > > > name text > > start_id integer > > end_id integer > > > > start_id and end_id are ranges which must not overlap but can have gaps > > between them. Is it possible to formulate a table check constraint that > > can verify that either id does not fall within an existing range at > > insert time? IE prevent overlaps during insert? > > > > Thanks, > > Wayne > > So this answer will not help you for the here-and-now, but Postgres 9.2 is > going to be released in the near future (though the beta is available) and > contains "range types" which have check constraints on them: > > http://www.postgresql.org/docs/9.2/static/rangetypes.html#RANGETYPES-CONSTRAINT > > You could formulate a check constraint right now to do the equivalent, albeit > it will involve a lot of conditions. > > Jonathan -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
