Re: Add proper planner support for ORDER BY / DISTINCT aggregates

Поиск
Список
Период
Сортировка
От David Rowley
Тема Re: Add proper planner support for ORDER BY / DISTINCT aggregates
Дата
Msg-id CAApHDvqiEBY5_fVv4ZwUtWDPk0pJ6TdoYKFMwhhF_Gdkv-xAkg@mail.gmail.com
обсуждение исходный текст
Ответ на Re: Add proper planner support for ORDER BY / DISTINCT aggregates  (Richard Guo <guofenglinux@gmail.com>)
Ответы Re: Add proper planner support for ORDER BY / DISTINCT aggregates
Список pgsql-hackers
Дерево обсуждения 
On Tue, 8 Nov 2022 at 19:51, Richard Guo <guofenglinux@gmail.com> wrote:
> For unsorted paths, the original logic here is to explicitly add a Sort
> path only for the cheapest-total path.  This patch changes that and may
> add a Sort path for other paths besides the cheapest-total path.  I
> think this may introduce in some unnecessary path candidates.

Yeah, you're right. The patch shouldn't change that.  I've adjusted
the attached patch so that part works more like it did before.

v2 attached.

Thanks

David
Вложения

В списке pgsql-hackers по дате отправления:

Предыдущее
От: Andres Freund
Дата:
Сообщение: Re: Add connection active, idle time to pg_stat_activity
Следующее
От: "David G. Johnston"
Дата:
Сообщение: Re: Add connection active, idle time to pg_stat_activity