QUERY PLAN                                         
--------------------------------------------------------------------------------------------
 Hash Join  (cost=xxx rows=10 width=4)
   Hash Cond: (bmt1.c1 = bmt2.c1)
   CTE c1
     ->  Merge Join  (cost=xxx rows=100 width=4)
           Merge Cond: (b1t1.c1 = b1t2.c1)
           ->  Index Only Scan using t1_i1 on t1 b1t1  (cost=xxx rows=1000 width=4)
           ->  Sort  (cost=xxx rows=100 width=4)
                 Sort Key: b1t2.c1
                 ->  Seq Scan on t2 b1t2  (cost=xxx rows=100 width=4)
   InitPlan 2 (returns $1)
     ->  Merge Join  (cost=xxx rows=100 width=4)
           Merge Cond: (b2t1.c1 = b2t2.c1)
           ->  Index Only Scan using t1_i1 on t1 b2t1  (cost=xxx rows=1000 width=4)
           ->  Sort  (cost=xxx rows=100 width=4)
                 Sort Key: b2t2.c1
                 ->  Seq Scan on t2 b2t2  (cost=xxx rows=100 width=4)
   InitPlan 3 (returns $2)
     ->  Merge Join  (cost=xxx rows=100 width=4)
           Merge Cond: (b3t1.c1 = b3t2.c1)
           ->  Index Only Scan using t1_i1 on t1 b3t1  (cost=xxx rows=1000 width=4)
           ->  Sort  (cost=xxx rows=100 width=4)
                 Sort Key: b3t2.c1
                 ->  Seq Scan on t2 b3t2  (cost=xxx rows=100 width=4)
   ->  Seq Scan on t1 bmt1  (cost=xxx rows=999 width=4)
         Filter: (c1 <> $2)
   ->  Hash  (cost=xxx rows=100 width=8)
         ->  Merge Join  (cost=xxx rows=100 width=8)
               Merge Cond: (bmt2.c1 = c1.c1)
               ->  Sort  (cost=xxx rows=100 width=4)
                     Sort Key: bmt2.c1
                     ->  Seq Scan on t2 bmt2  (cost=xxx rows=100 width=4)
               ->  Sort  (cost=xxx rows=100 width=4)
                     Sort Key: c1.c1
                     ->  CTE Scan on c1  (cost=xxx rows=100 width=4)
(34 rows)

                                         QUERY PLAN                                         
--------------------------------------------------------------------------------------------
 Hash Join  (cost=xxx rows=1 width=4)
   Hash Cond: (bmt1.c1 = bmt2.c1)
   CTE c1
     ->  Merge Join  (cost=xxx rows=1 width=4)
           Merge Cond: (b1t1.c1 = b1t2.c1)
           ->  Index Only Scan using t1_i1 on t1 b1t1  (cost=xxx rows=1000 width=4)
           ->  Sort  (cost=xxx rows=100 width=4)
                 Sort Key: b1t2.c1
                 ->  Seq Scan on t2 b1t2  (cost=xxx rows=100 width=4)
   InitPlan 2 (returns $1)
     ->  Merge Join  (cost=xxx rows=1 width=4)
           Merge Cond: (b2t1.c1 = b2t2.c1)
           ->  Index Only Scan using t1_i1 on t1 b2t1  (cost=xxx rows=1000 width=4)
           ->  Sort  (cost=xxx rows=100 width=4)
                 Sort Key: b2t2.c1
                 ->  Seq Scan on t2 b2t2  (cost=xxx rows=100 width=4)
   InitPlan 3 (returns $2)
     ->  Merge Join  (cost=xxx rows=1 width=4)
           Merge Cond: (b3t1.c1 = b3t2.c1)
           ->  Index Only Scan using t1_i1 on t1 b3t1  (cost=xxx rows=1000 width=4)
           ->  Sort  (cost=xxx rows=100 width=4)
                 Sort Key: b3t2.c1
                 ->  Seq Scan on t2 b3t2  (cost=xxx rows=100 width=4)
   ->  Seq Scan on t1 bmt1  (cost=xxx rows=999 width=4)
         Filter: (c1 <> $2)
   ->  Hash  (cost=xxx rows=1 width=8)
         ->  Merge Join  (cost=xxx rows=1 width=8)
               Merge Cond: (bmt2.c1 = c1.c1)
               ->  Sort  (cost=xxx rows=100 width=4)
                     Sort Key: bmt2.c1
                     ->  Seq Scan on t2 bmt2  (cost=xxx rows=100 width=4)
               ->  Sort  (cost=xxx rows=1 width=4)
                     Sort Key: c1.c1
                     ->  CTE Scan on c1  (cost=xxx rows=1 width=4)
(34 rows)