teledb=# execute direct on (dn01) 'select * from teledb_pg';
 id |  nickname  
----+------------
  1 | teledb
  1 | hello,pgxc
  2 | TELEDB
(3 rows)

teledb=# execute direct on (dn02) 'select * from teledb_pg';
 id | nickname 
----+----------
  3 | pg
  4 | 
(2 rows)