Re: Query on postgresql 7.4.2 not using index

Поиск
Список
Период
Сортировка
От chris smith
Тема Re: Query on postgresql 7.4.2 not using index
Дата
Msg-id 3c1395330604251839g1063da6k62f0c85d59fe89c0@mail.gmail.com
обсуждение исходный текст
Ответ на Re: Query on postgresql 7.4.2 not using index  (Scott Marlowe <smarlowe@g2switchworks.com>)
Список pgsql-performance
> OK.  Stop and think about what you're telling postgresql to do here.
>
> You're telling it to cast the field group_id to int8, then compare it to
> 9.  How can it cast the group_id to int8 without fetching it?  That's
> right, you're ensuring a seq scan.  You need to put the int8 cast on the
> other side of that equality comparison, like:

Yeh that one was my fault :) I couldn't remember which way it went and
if 7.4.x had issues with int8 indexes..

--
Postgresql & php tutorials
http://www.designmagick.com/

В списке pgsql-performance по дате отправления:

Предыдущее
От: Tom Lane
Дата:
Сообщение: Re: PL/pgSQL Loop Vs. Batch Update
Следующее
От: Tom Lane
Дата:
Сообщение: Re: Firebird 1.5.3 X Postgresql 8.1.3 (linux and windows)