Re: EAV or not to EAV?

On Thu, 22 Nov 2007, Reg Me Please wrote:

> Hi all.
>
> I have to take into account the update history of every single
> field into a number of tables.
> Those updates can come to the future (next values) but also to the
> past (history fix) and apply only to some fields, usually not to the
> entire record.
> Every lookup in those tables is always related to a timestamp that
> normally is the current timestamp, but can also be a past timestamp.
>
> I've come up with a "traditionally regretted" EAV design with the add of
> timestamps for the history. And the related problems, some of which have
> been solved by Joe Conways's crosstab contrib.
>
> Is there a better idea than mine? I hope so.

We use contrib/hstore for this


     Regards,
         Oleg
_____________________________________________________________
Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru),
Sternberg Astronomical Institute, Moscow University, Russia
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(495)939-16-83, +007(495)939-23-83