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