On Wednesday 14 January 2004 18:55, Sezai YILMAZ wrote:
> Shridhar Daithankar wrote:
> >Rather than doing count(*), you should either cache the count in
> > application memory
> >
> > or analyze often and use following.
> >
> >'select reltuples from pg_class where relname = 'foo';
>
> Thank you very much Shridhar. This one is responsive immediately. I
> think I will use this method for gathering row count. But I complain to
> break SQL standards. The code will become unmovable.
Well, you could document it somewhere for your reference. It is not that
hard..:-)
And remember, the value you get is just an estimate. You need to analyze the
table often with respect to it's update/insert/delete activity to keep the
estimate reasonable accurate. Vacuuming would also update the estimate.
Shridhar
