Re: join optimization problem

> 	thanks for that - I tried it out, fixed the minor typos and it ran at almost 
> the same speed!  Any other ideas?

Could you post an explain analyze for both queries?


There is always an application change.  Add a trigger onto msg that will
bump the date and count on msg_sum when a msg is added.  This will
support virtually unlimited msg table growth (any aggregate will
eventually be slow on a large table).

Just be sure to vacuum the msg_sum table regularly (once per 25%
turnover) -- possibly as often as once a minute!