Re: Considering fractional paths in Append node

Nikita Malakhov <hukutoc@gmail.com> writes:

Helll Nikita,

> Hi hackers!
>
> Sorry, I've forgot to attach the patch itself. Please check it out.

Could you check if [1] is related to this subject? I think the hard part
would be which tuple_fraction to use during adding
add_paths_to_append_rel since root->tuple_fraction is on subquery level,
while the add_paths_to_append_rel is only on RelOptInfo level.

[1]
https://www.postgresql.org/message-id/CAApHDvry0nSV62kAOH3iccvfPhGPLN0Q97%2B%3Db1RsDPXDz3%3DCiQ%40mail.gmail.com

-- 
Best Regards
Andy Fan