Re: Parallel Aggregate
От | David Rowley |
---|---|
Тема | Re: Parallel Aggregate |
Дата | |
Msg-id | CAKJS1f_vSpep=FxAExBwfCJ4j6vDeof3AMWe__ekZq9MSNwNWA@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: Parallel Aggregate (Haribabu Kommi <kommi.haribabu@gmail.com>) |
Список | pgsql-hackers |
On 7 March 2016 at 18:19, Haribabu Kommi <kommi.haribabu@gmail.com> wrote: > Here I attached update patch with further changes, > 1. Explain plan changes for parallel grouping Perhaps someone might disagree with me, but I'm not all that sure I really get the need for that. With nodeAgg.c we're doing something fundamentally different in Partial mode as we are in Finalize mode, that's why I wanted to give an indication of that in the explain.c originally. A query with no Aggregate functions using nodeGroup.c there is no special handling in the executor for partial and final stages, so I really don't see why we need to give the impression that there is in EXPLAIN. -- David Rowley http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training & Services
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