2 ----------------------------------------------------------------------------
3 Nested Loop (cost=xxx rows=1000 width=30)
4 -> Seq Scan on t1 r4t1 (cost=xxx rows=1000 width=15)
5 -> Index Scan using t1_i1 on t1 r5t1 (cost=xxx rows=1 width=15)
6 Index Cond: (c1 = r4t1.c1)
10 ----------------------------------------------------------------------------
11 Nested Loop (cost=xxx rows=1 width=30)
12 -> Seq Scan on t1 r4t1 (cost=xxx rows=1000 width=15)
13 -> Index Scan using t1_i1 on t1 r5t1 (cost=xxx rows=1 width=15)
14 Index Cond: (c1 = r4t1.c1)