Re: any way to use indexscan to get last X values

At 16:31 15.6.2003, Shridhar Daithankar wrote:

>Question. The field approved seems to have boolean values. If probability of
>having either of value is 50%, I doubt planner will use index anyway.

True. It has Y or N only so index on approved is useless. But using index 
on ORDER BY part would help a lot since it knows to fetch last X ordered 
values.

>Correct me if I am wrong.
Unfortunately you are very right.

I am not sure how to stuff modifystamp and thread into WHERE clause to make 
it use indexes on thread and/or modifystamp. So far I believe this would be 
the only way to use them, right?

Tomaz