On Thu, Feb 23, 2006 at 03:34:36PM -0300, Rodrigo Sakai <rodrigo.sakai@xxxxxxxxxxx> wrote: > I'm focus on temporal databases (not temporary), and I want to know if anyone here is studying this tecnologies too. So, we can exchange knowlegment. Specifically, anyone who is trying to implement on postgresql the aspect of time (temporal). > These researches are lead by Richard Snodgrass. So, anyone who have something to share, please contact me! Not sure if I understand the problem correctly, but the contrib/spi/timetravel module does something which I think may be what you are talking about. http://developer.postgresql.org/cvsweb.cgi/~checkout~/pgsql/contrib/spi/README.timetravel The docs are a bit cryptic but you should be able to grasp if it suits your needs. Basically you can go back to any point in tabe for a timetravel table and make date based comparisons. Hope this helps, forgive my ignorance if if doesn't. bkw
