Re: Calculation of unused columns

Поиск
Список
Период
Сортировка
Искать
От
Simon Riggs
Тема
Re: Calculation of unused columns
Дата
Msg-id
1255973775.492.10.camel@ebony
Ответ на
Список
Дерево обсуждения
Re: Calculation of unused columns Tim Landscheidt <tim@tim-landscheidt.de>
Re: Calculation of unused columns Jeff Janes <jeff.janes@gmail.com>
Re: Calculation of unused columns Robert Haas <robertmhaas@gmail.com>
Re: Calculation of unused columns Tom Lane <tgl@sss.pgh.pa.us>
Re: Calculation of unused columns Robert Haas <robertmhaas@gmail.com>
Re: Calculation of unused columns Tom Lane <tgl@sss.pgh.pa.us>
Re: Calculation of unused columns Tom Lane <tgl@sss.pgh.pa.us>
Re: Calculation of unused columns Gerhard Wiesinger <lists@wiesinger.com>
Re: Calculation of unused columns Tom Lane <tgl@sss.pgh.pa.us>
On Sat, 2009-10-17 at 21:41 -0400, Tom Lane wrote:

> one thing we'd have to consider
> is whether it is okay to suppress calculation of columns containing
> volatile functions.

I think we should have a 4th class of functions,
volatile-without-side-effects (better name needed, obviously).

That would allow us to optimize such calls away, if appropriate.

-- 
 Simon Riggs           www.2ndQuadrant.com

В списке pgsql-performance по дате отправления
От: Grzegorz Jaśkiewicz
Дата:
От: Tom Lane
Дата:
FAQ