Re: partition queries hitting all partitions even though check key is specified

Поиск
Список
Период
Сортировка
От Josh Berkus
Тема Re: partition queries hitting all partitions even though check key is specified
Дата
Msg-id 4C3BD6F4.4070802@agliodbs.com
обсуждение исходный текст
Ответ на Re: partition queries hitting all partitions even though check key is specified  (Kevin Kempter <kevink@consistentstate.com>)
Ответы Re: partition queries hitting all partitions even though check key is specified  ("Joshua D. Drake" <jd@commandprompt.com>)
Re: partition queries hitting all partitions even thoughcheck key is specified  ("Joshua D. Drake" <jd@commandprompt.com>)
Список pgsql-performance
On 9/2/09 10:05 AM, Kevin Kempter wrote:
> On Wednesday 02 September 2009 09:02:27 Scott Marlowe wrote:
>> On Wed, Sep 2, 2009 at 8:52 AM, Kevin Kempter<kevink@consistentstate.com>
> wrote:
>>> Hi all;
>>>
>>> I cant figure out why we're scanning all of our partitions.

I don't think extract() is immutable, which would pretty much invalidate
your check constraints as far as CE is concerned.

I suggest feeding the actual numeric values to the check constraints.

--
                                  -- Josh Berkus
                                     PostgreSQL Experts Inc.
                                     http://www.pgexperts.com

В списке pgsql-performance по дате отправления:

Предыдущее
От: phb07
Дата:
Сообщение: Re: Slow query with planner row strange estimation
Следующее
От: "Joshua D. Drake"
Дата:
Сообщение: Re: partition queries hitting all partitions even though check key is specified