Re: Early WIP/PoC for inlining CTEs

Поиск
Список
Период
Сортировка
От David Fetter
Тема Re: Early WIP/PoC for inlining CTEs
Дата
Msg-id 20181003155720.GG25294@fetter.org
обсуждение исходный текст
Ответ на Re: Early WIP/PoC for inlining CTEs  (Andreas Karlsson <andreas@proxel.se>)
Ответы Re: Early WIP/PoC for inlining CTEs
Список pgsql-hackers
On Tue, Oct 02, 2018 at 12:03:06PM +0200, Andreas Karlsson wrote:
> Hi,
> 
> Here is an updated patch which adds some simple syntax for adding the
> optimization barrier. For example:
> 
> WITH x AS MATERIALIZED (
>    SELECT 1
> )
> SELECT * FROM x;
> 
> Andreas

This is great!

Is there any meaningful distinction between "inlining," by which I
mean converting to a subquery, and predicate pushdown, which
would happen at least for a first cut, at the rewrite stage?

Best,
David.
-- 
David Fetter <david(at)fetter(dot)org> http://fetter.org/
Phone: +1 415 235 3778

Remember to vote!
Consider donating to Postgres: http://www.postgresql.org/about/donate


В списке pgsql-hackers по дате отправления:

Предыдущее
От: Andres Freund
Дата:
Сообщение: Re: Performance improvements for src/port/snprintf.c
Следующее
От: Tom Lane
Дата:
Сообщение: Re: Performance improvements for src/port/snprintf.c