EXPLAIN select s_name, s_address from supplier, nation where s_suppkey in ( select distinct (ps_suppkey) from partsupp, part where ps_partkey=p_partkey and p_name like 'red%' and ps_availqty > ( select 0.5 * sum(l_quantity) from lineitem where l_partkey = ps_partkey and l_suppkey = ps_suppkey and l_shipdate >= '1994-01-01' and l_shipdate < date '1994-01-01' + interval '1 year' ) ) and s_nationkey = n_nationkey and n_name = 'CANADA' order by s_name;
                                                                            QUERY PLAN                                                                            
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 Sort  (cost=98489.53..98489.56 rows=11 width=51)
   Sort Key: supplier.s_name
   ->  Hash Join  (cost=96669.08..98489.34 rows=11 width=51)
         Hash Cond: (supplier.s_nationkey = nation.n_nationkey)
         ->  Nested Loop  (cost=96667.75..98486.91 rows=267 width=55)
               ->  HashAggregate  (cost=96667.46..96670.13 rows=267 width=4)
                     Group Key: partsupp.ps_suppkey
                     ->  Nested Loop  (cost=0.43..96666.79 rows=267 width=4)
                           ->  Seq Scan on part  (cost=0.00..65626.29 rows=200 width=4)
                                 Filter: ((p_name)::text ~~ 'red%'::text)
                           ->  Index Scan using i_ps_partkey on partsupp  (cost=0.43..155.14 rows=6 width=8)
                                 Index Cond: (ps_partkey = part.p_partkey)
                                 Filter: ((ps_availqty)::double precision > (SubPlan 1))
                                 SubPlan 1
                                   ->  Aggregate  (cost=8.59..8.60 rows=1 width=4)
                                         ->  Index Scan using i_l_suppkey_partkey on lineitem  (cost=0.56..8.59 rows=1 width=4)
                                               Index Cond: ((l_partkey = partsupp.ps_partkey) AND (l_suppkey = partsupp.ps_suppkey))
                                               Filter: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1995-01-01 00:00:00'::timestamp without time zone))
               ->  Index Scan using supplier_pkey on supplier  (cost=0.29..6.78 rows=1 width=59)
                     Index Cond: (s_suppkey = partsupp.ps_suppkey)
         ->  Hash  (cost=1.31..1.31 rows=1 width=4)
               ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4)
                     Filter: (n_name = 'CANADA'::bpchar)
(23 rows)