Re: Asynchronous Append on postgres_fdw nodes. - Mailing list pgsql-hackers

The patch has a problem with partitionwise aggregates.

Asynchronous append do not allow the planner to use partial aggregates. 
Example you can see in attachment. I can't understand why: costs of 
partitionwise join are less.
Initial script and explains of the query with and without the patch you 
can see in attachment.

-- 
Andrey Lepikhov
Postgres Professional
https://postgrespro.com