On Thu, Feb 23, 2006 at 03:34:36PM -0300, Rodrigo Sakai <[EMAIL PROTECTED]> 
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


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