2 --------------------------------------------------------------------------
3 Hash Join (cost=xxx rows=1000 width=30)
4 Hash Cond: (r4t1.c1 = r4t1_1.c1)
5 -> Seq Scan on t1 r4t1 (cost=xxx rows=1000 width=15)
6 -> Hash (cost=xxx rows=1000 width=15)
7 -> Seq Scan on t1 r4t1_1 (cost=xxx rows=1000 width=15)
11 --------------------------------------------------------------------------
12 Hash Join (cost=xxx rows=1000 width=30)
13 Hash Cond: (r4t1.c1 = r4t1_1.c1)
14 -> Seq Scan on t1 r4t1 (cost=xxx rows=1000 width=15)
15 -> Hash (cost=xxx rows=1000 width=15)
16 -> Seq Scan on t1 r4t1_1 (cost=xxx rows=1000 width=15)