Re: Planner statistics, correlations
| От | Tobias Brox |
|---|---|
| Тема | Re: Planner statistics, correlations |
| Дата | |
| Msg-id | 20070112090500.GB16243@oppetid.no обсуждение исходный текст |
| Ответ на | Re: Planner statistics, correlations ("Peter Childs" <peterachilds@gmail.com>) |
| Ответы |
Re: Planner statistics, correlations
Re: Planner statistics, correlations |
| Список | pgsql-performance |
[Peter Childs - Fri at 08:56:54AM +0000] > Can you say what state might be rather than what it is not. I'm guess > that state is an int but there is only a limited list of possible > states, if you can say what it might be rather than what it is the > index is more liklly to be used. explain select * from events where state in (1,2,3) and event_time<now() also estimates almost 5k of rows. I also tried: explain select * from events where state=2 and event_time<now() but get the same behaviour. Maybe it would help to partitionate the table every year?
В списке pgsql-performance по дате отправления: