Re: MergeAppend could consider sorting cheapest child path

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От Andy Fan
Тема Re: MergeAppend could consider sorting cheapest child path
Дата
Msg-id 87wmi7tvo7.fsf@163.com
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Ответ на Re: MergeAppend could consider sorting cheapest child path  (Bruce Momjian <bruce@momjian.us>)
Ответы Re: MergeAppend could consider sorting cheapest child path
Re: MergeAppend could consider sorting cheapest child path
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Bruce Momjian <bruce@momjian.us> writes:

> Is this still being considered?

I'd +1 on this feature. I guess this would be more useful on parallel
case, where the Sort can be pushed down to parallel worker, and in the
distributed database case, where the Sort can be pushed down to multiple
nodes, at the result, the leader just do the merge works.

At the high level implementaion, sorting *cheapest* child path looks
doesn't add too much overhead on the planning effort. 

-- 
Best Regards
Andy Fan




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