Re: Checking = with timestamp field is slow

Поиск
Список
Период
Сортировка
От Christopher Browne
Тема Re: Checking = with timestamp field is slow
Дата
Msg-id m3zn1wsbr9.fsf@knuth.knuth.cbbrowne.com
обсуждение исходный текст
Ответ на Checking = with timestamp field is slow  (Antony Paul <antonypaul24@gmail.com>)
Ответы Re: Checking = with timestamp field is slow  (Michael Fuhr <mike@fuhr.org>)
Список pgsql-performance
After a long battle with technology, antonypaul24@gmail.com (Antony Paul), an earthling, wrote:
> Hi all,
>    I have a table which have more than 200000 records. I need to get
> the records which matches like this
>
> where today::date = '2004-11-05';
>
> This is the only condition in the query. There is a btree index on the
> column today.
> Is there any way to optimise it.

How about changing the criterion to:

  where today between '2004-11-05' and '2004-11-06';

That ought to make use of the index on "today".
--
"cbbrowne","@","ntlug.org"
http://www.ntlug.org/~cbbrowne/sgml.html
"People need to quit pretending they can invent THE interface and walk
away from it, like some Deist fantasy." -- Michael Peck

В списке pgsql-performance по дате отправления:

Предыдущее
От: Michael Fuhr
Дата:
Сообщение: Re: Checking = with timestamp field is slow
Следующее
От: Allen Landsidel
Дата:
Сообщение: Strange (?) Index behavior?