BEGIN;
BEGIN
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 'cornflower%'
			and ps_availqty > (
				select
					0.5 * sum(l_quantity)
				from
					lineitem
				where
					l_partkey = ps_partkey
					and l_suppkey = ps_suppkey
					and l_shipdate >= '1995-01-01'
					and l_shipdate < cast(date '1995-01-01' + interval '1 year' as date)
			)
	)
	and s_nationkey = n_nationkey
	and n_name = 'BRAZIL'
order by
	s_name;
                                                                                  QUERY PLAN                                                                                  
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=12740183.38..12740186.31 rows=1174 width=51)
   Sort Key: supplier.s_name
   ->  Nested Loop  (cost=12735713.87..12740123.52 rows=1174 width=51)
         Join Filter: (supplier.s_nationkey = nation.n_nationkey)
         ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4)
               Filter: (n_name = 'BRAZIL'::bpchar)
         ->  Hash Semi Join  (cost=12735713.87..12739755.20 rows=29361 width=55)
               Hash Cond: (supplier.s_suppkey = partsupp.ps_suppkey)
               ->  Seq Scan on supplier  (cost=0.00..3179.00 rows=100000 width=59)
               ->  Hash  (cost=12735346.86..12735346.86 rows=29361 width=4)
                     ->  HashAggregate  (cost=12734759.64..12735053.25 rows=29361 width=4)
                           ->  Nested Loop  (cost=0.00..12734686.23 rows=29361 width=4)
                                 ->  Seq Scan on part  (cost=0.00..65522.00 rows=22021 width=4)
                                       Filter: ((p_name)::text ~~ 'cornflower%'::text)
                                 ->  Index Scan using pk_partsupp on partsupp  (cost=0.00..575.31 rows=1 width=8)
                                       Index Cond: (ps_partkey = part.p_partkey)
                                       Filter: ((ps_availqty)::double precision > (SubPlan 1))
                                       SubPlan 1
                                         ->  Aggregate  (cost=140.92..140.94 rows=1 width=4)
                                               ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.92 rows=1 width=4)
                                                     Index Cond: (l_partkey = partsupp.ps_partkey)
                                                     Filter: ((l_shipdate >= '1995-01-01'::date) AND (l_shipdate < '1996-01-01'::date) AND (l_suppkey = partsupp.ps_suppkey))
(22 rows)

COMMIT;
COMMIT