QUERY PLAN                                   
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 Hash Right Join  (cost=76.57..116.64 rows=59 width=16)
   Hash Cond: (b.i = a.i)
   ->  Seq Scan on tab1 b  (cost=0.00..31.40 rows=2140 width=8)
   ->  Hash  (cost=76.50..76.50 rows=6 width=8)
         ->  Hash Join  (cost=73.64..76.50 rows=6 width=8)
               Hash Cond: (tab2.k = a.i)
               ->  HashAggregate  (cost=36.75..38.75 rows=200 width=4)
                     ->  Seq Scan on tab2  (cost=0.00..31.40 rows=2140 width=4)
               ->  Hash  (cost=36.75..36.75 rows=11 width=8)
                     ->  Seq Scan on tab1 a  (cost=0.00..36.75 rows=11 width=8)
                           Filter: (i = j)
(11 rows)