Hi.
+ An aggregate function, called the partial aggregate function for
partial aggregate
+ that corresponding to the aggregate function, is defined on the
primary node and
+ the <filename>postgres_fdw</filename> node.
Something is clearly wrong here.
+ When using built-in sharding feature in PostgreSQL is used,
And here.
Overall the code looks good to me, but I suppose that documentation
needs further review from some native speaker.
--
Best regards,
Alexander Pyhalov,
Postgres Professional