pgspider_ext

pig build pkg pgspider_ext         # build DEB packages

pig repo add pgdg -u          # Add PGDG repo and update cache

CREATE EXTENSION pgspider_ext;

CREATE EXTENSION pgspider_ext;
CREATE EXTENSION postgres_fdw;

CREATE SERVER pgsrv1 FOREIGN DATA WRAPPER postgres_fdw
  OPTIONS (host '127.0.0.1', port '5433', dbname 'postgres');
CREATE SERVER pgsrv2 FOREIGN DATA WRAPPER postgres_fdw
  OPTIONS (host '127.0.0.1', port '5434', dbname 'postgres');

CREATE USER MAPPING FOR CURRENT_USER SERVER pgsrv1
  OPTIONS (user 'user', password 'pass');
CREATE USER MAPPING FOR CURRENT_USER SERVER pgsrv2
  OPTIONS (user 'user', password 'pass');

CREATE FOREIGN TABLE t1_pg1_child (i int, t text)
  SERVER pgsrv1 OPTIONS (table_name 't1');
CREATE FOREIGN TABLE t1_pg2_child (i int, t text)
  SERVER pgsrv2 OPTIONS (table_name 't1');

CREATE SERVER spdsrv FOREIGN DATA WRAPPER pgspider_ext;
CREATE USER MAPPING FOR CURRENT_USER SERVER spdsrv;

CREATE TABLE t1 (i int, t text, node text)
  PARTITION BY LIST (node);

CREATE FOREIGN TABLE t1_pg1 PARTITION OF t1
  FOR VALUES IN ('node1') SERVER spdsrv;
CREATE FOREIGN TABLE t1_pg2 PARTITION OF t1
  FOR VALUES IN ('node2') SERVER spdsrv
  OPTIONS (child_name 't1_pg2_child');

SELECT * FROM t1;
 i  | t | node
----+---+-------
 10 | a | node1
 11 | b | node1
 20 | c | node2
 21 | d | node2

SET enable_partitionwise_aggregate TO on;
SELECT count(*), node FROM t1 GROUP BY node;