2 ----------------------------------------------------------------------------
3 Hash Join (cost=xxx rows=584 width=406)
4 Hash Cond: (t1.oid = t2.oid)
5 -> Seq Scan on pg_class t1 (cost=xxx rows=584 width=207)
6 -> Hash (cost=xxx rows=584 width=207)
7 -> Seq Scan on pg_class t2 (cost=xxx rows=584 width=207)
11 ----------------------------------------------------------------------------
12 Hash Join (cost=xxx rows=1 width=406)
13 Hash Cond: (t1.oid = t2.oid)
14 -> Seq Scan on pg_class t1 (cost=xxx rows=584 width=207)
15 -> Hash (cost=xxx rows=584 width=207)
16 -> Seq Scan on pg_class t2 (cost=xxx rows=584 width=207)