Re: Strange query plan

Поиск
Список
Период
Сортировка
От Dmitry Teslenko
Тема Re: Strange query plan
Дата
Msg-id 91325fec0808140755v42a95803xda0b03f354fb35c3@mail.gmail.com
обсуждение исходный текст
Ответ на Strange query plan  ("Dmitry Teslenko" <dteslenko@gmail.com>)
Список pgsql-general
On Thu, Aug 14, 2008 at 18:47, Scott Marlowe <scott.marlowe@gmail.com> wrote:
> What does "explain analyze select.... (your query here)" have to say?
>
Expalin analyze says it makes sequential scan on a table table1.

On Thu, Aug 14, 2008 at 18:48, Gauthier, Dave <dave.gauthier@intel.com> wrote:
> Try this...
>
> Set default_statistics_target to be 1000 in postgres.conf then reboot
> your pg server.  "Analyze" the table.  Try the query again.
>
> If that fails, drop the index on (field1, field3) and recreate the other
> way around (field3, field1).  Analyze again and try the query.
>
> -dave
I've altered query and swapped field1 and field3 there, in where statement.
Seems that order doesn't matter.

--
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?

В списке pgsql-general по дате отправления:

Предыдущее
От: "Scott Marlowe"
Дата:
Сообщение: Re: Strange query plan
Следующее
От: "Gauthier, Dave"
Дата:
Сообщение: Re: Strange query plan