Re: Considering fractional paths in Append node

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От Nikita Malakhov
Тема Re: Considering fractional paths in Append node
Дата
Msg-id CAN-LCVPCS4nhQARySFcQHhUQdxZHagWXmxr=SMekgDAxU5124A@mail.gmail.com
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Ответ на Re: Considering fractional paths in Append node  (Andrei Lepikhov <lepihov@gmail.com>)
Список pgsql-hackers
Hi,

Andy, your words make sense, but to me it seems that in add_paths_to_append_rel
we have no other options than tuple_fraction from root, and rows (if any) in paths
we take into account, please correct me if I am wrong.

Thank you!

Also, on top of that I have an idea of pruning unnecessary partitions
in generate_orderedappend_paths() when we have a valid LIMIT value.
I'm currently checking if it is working correctly in multiple cases,
so 'll send it after we deal with this issue.

--
Regards,
Nikita Malakhov
Postgres Professional
The Russian Postgres Company

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