> what i need is to see how 2 fields specific change there values, to do
> that i plan to make a temporal table with the fields before and after
> plus the time the changes where made... can i do this with store
> procedures??

http://www.varlena.com/varlena/GeneralBits/104.php

Check out this discussion on this link. It is very similar to what you want to do. If fact, my
experience is that "generalbits" is an excellent cookbook for and learning Postgresql developer.

Regards,
Richard Broersma Jr.

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TIP 6: explain analyze is your friend