The cost of the RemoteSubplan node changed, most likely due to moving
the Sort pushdown into pathnode.c (instead of in createplan.c).
INNER JOIN xl_join_t3 ON xl_join_t1.val1 = xl_join_t3.val1;
QUERY PLAN
----------------------------------------------------------------------------------------------------------------------
- Remote Subquery Scan on all (datanode_1,datanode_2) (cost=475.52..5209.87 rows=288579 width=24)
+ Remote Subquery Scan on all (datanode_1,datanode_2) (cost=575.52..13678.66 rows=288579 width=24)
-> Merge Join (cost=475.52..5209.87 rows=288579 width=24)
Merge Cond: (xl_join_t3.val1 = xl_join_t1.val1)
-> Sort (cost=158.51..164.16 rows=2260 width=8)