On Sat, Mar 05, 2005 at 03:46:53AM +0200, Tzahi Fadida wrote:
> Its called a "temporal database".
> Usually its intended for medical or police databases where
> you need a hind sight. i.e. if today is 31/12/2005, what did we know at
> 20/12/2005.
> for example, for a doctor appearing at court and required to testify
> what he knew at 20/12/2005.
> Very cool.
> It would be nice if postgreSQL could have a switch that
> could turn it into a temporal database.
It used to be builtin a long time ago. It's since been moved to the
contrib module "timetravel". It does historical queries and stuff...
--
Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/
> Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a
> tool for doing 5% of the work and then sitting around waiting for someone
> else to do the other 95% so you can sue them.