BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
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 'sienna%'
			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 = 'IRAQ'
order by
	s_name;
                                                                                                  QUERY PLAN                                                                                                   
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=12740713.76..12740716.68 rows=1169 width=51) (actual time=49530.943..49531.219 rows=1835 loops=1)
   Sort Key: supplier.s_name
   Sort Method: quicksort  Memory: 262kB
   Buffers: shared hit=2749935 read=389791 dirtied=2772 written=13257
   ->  Nested Loop  (cost=12736248.97..12740654.19 rows=1169 width=51) (actual time=49140.610..49516.066 rows=1835 loops=1)
         Join Filter: (supplier.s_nationkey = nation.n_nationkey)
         Rows Removed by Join Filter: 43040
         Buffers: shared hit=2749930 read=389791 dirtied=2772 written=13257
         ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.016..0.030 rows=1 loops=1)
               Filter: (n_name = 'IRAQ'::bpchar)
               Rows Removed by Filter: 24
               Buffers: shared hit=1
         ->  Hash Semi Join  (cost=12736248.97..12740287.69 rows=29215 width=55) (actual time=49140.186..49507.897 rows=44875 loops=1)
               Hash Cond: (supplier.s_suppkey = partsupp.ps_suppkey)
               Buffers: shared hit=2749929 read=389791 dirtied=2772 written=13257
               ->  Seq Scan on supplier  (cost=0.00..3179.00 rows=100000 width=59) (actual time=0.021..100.736 rows=100000 loops=1)
                     Buffers: shared hit=2179
               ->  Hash  (cost=12735883.78..12735883.78 rows=29215 width=4) (actual time=49140.115..49140.115 rows=44875 loops=1)
                     Buckets: 4096  Batches: 1  Memory Usage: 1578kB
                     Buffers: shared hit=2747750 read=389791 dirtied=2772 written=13257
                     ->  HashAggregate  (cost=12735299.48..12735591.63 rows=29215 width=4) (actual time=49086.043..49119.775 rows=44875 loops=1)
                           Buffers: shared hit=2747750 read=389791 dirtied=2772 written=13257
                           ->  Nested Loop  (cost=0.00..12735226.45 rows=29215 width=4) (actual time=3.126..48904.949 rows=59438 loops=1)
                                 Buffers: shared hit=2747750 read=389791 dirtied=2772 written=13257
                                 ->  Seq Scan on part  (cost=0.00..65522.00 rows=22022 width=4) (actual time=0.364..2474.721 rows=21926 loops=1)
                                       Filter: ((p_name)::text ~~ 'sienna%'::text)
                                       Rows Removed by Filter: 1978074
                                       Buffers: shared hit=11671 read=28851 written=945
                                 ->  Index Scan using pk_partsupp on partsupp  (cost=0.00..575.31 rows=1 width=8) (actual time=1.412..2.113 rows=3 loops=21926)
                                       Index Cond: (ps_partkey = part.p_partkey)
                                       Filter: ((ps_availqty)::double precision > (SubPlan 1))
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=2736079 read=360940 dirtied=2772 written=12312
                                       SubPlan 1
                                         ->  Aggregate  (cost=140.92..140.93 rows=1 width=4) (actual time=0.501..0.501 rows=1 loops=87704)
                                               Buffers: shared hit=2664849 read=341610 dirtied=2772 written=11584
                                               ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.92 rows=1 width=4) (actual time=0.316..0.497 rows=1 loops=87704)
                                                     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))
                                                     Rows Removed by Filter: 29
                                                     Buffers: shared hit=2664849 read=341610 dirtied=2772 written=11584
 Total runtime: 49533.489 ms
(42 rows)

COMMIT;
COMMIT