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 'lemon%'
			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 < cast(date '1994-01-01' + interval '1 year' as date)
			)
	)
	and s_nationkey = n_nationkey
	and n_name = 'UNITED STATES'
order by
	s_name;
                                                                                                  QUERY PLAN                                                                                                   
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=12740177.87..12740180.80 rows=1169 width=51) (actual time=12896.004..12896.221 rows=1826 loops=1)
   Sort Key: supplier.s_name
   Sort Method: quicksort  Memory: 259kB
   Buffers: shared hit=2779139 read=331460 dirtied=3583 written=387
   ->  Nested Loop  (cost=12735712.48..12740118.31 rows=1169 width=51) (actual time=12573.334..12861.520 rows=1826 loops=1)
         Join Filter: (supplier.s_nationkey = nation.n_nationkey)
         Rows Removed by Join Filter: 42869
         Buffers: shared hit=2779134 read=331460 dirtied=3583 written=387
         ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.018..0.019 rows=1 loops=1)
               Filter: (n_name = 'UNITED STATES'::bpchar)
               Rows Removed by Filter: 24
               Buffers: shared hit=1
         ->  Hash Semi Join  (cost=12735712.48..12739751.56 rows=29235 width=55) (actual time=12573.160..12853.847 rows=44695 loops=1)
               Hash Cond: (supplier.s_suppkey = partsupp.ps_suppkey)
               Buffers: shared hit=2779133 read=331460 dirtied=3583 written=387
               ->  Seq Scan on supplier  (cost=0.00..3179.00 rows=100000 width=59) (actual time=0.022..55.931 rows=100000 loops=1)
                     Buffers: shared hit=3 read=2176
               ->  Hash  (cost=12735347.04..12735347.04 rows=29235 width=4) (actual time=12573.087..12573.087 rows=44695 loops=1)
                     Buckets: 4096  Batches: 1  Memory Usage: 1572kB
                     Buffers: shared hit=2779130 read=329284 dirtied=3583 written=387
                     ->  HashAggregate  (cost=12734762.34..12735054.69 rows=29235 width=4) (actual time=12529.668..12555.861 rows=44695 loops=1)
                           Buffers: shared hit=2779130 read=329284 dirtied=3583 written=387
                           ->  Nested Loop  (cost=0.00..12734689.26 rows=29235 width=4) (actual time=0.923..12423.803 rows=58989 loops=1)
                                 Buffers: shared hit=2779130 read=329284 dirtied=3583 written=387
                                 ->  Seq Scan on part  (cost=0.00..65522.00 rows=22021 width=4) (actual time=0.019..1147.358 rows=21738 loops=1)
                                       Filter: ((p_name)::text ~~ 'lemon%'::text)
                                       Rows Removed by Filter: 1978262
                                       Buffers: shared hit=1 read=40521 written=56
                                 ->  Index Scan using pk_partsupp on partsupp  (cost=0.00..575.31 rows=1 width=8) (actual time=0.404..0.516 rows=3 loops=21738)
                                       Index Cond: (ps_partkey = part.p_partkey)
                                       Filter: ((ps_availqty)::double precision > (SubPlan 1))
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=2779129 read=288763 dirtied=3583 written=331
                                       SubPlan 1
                                         ->  Aggregate  (cost=140.92..140.94 rows=1 width=4) (actual time=0.118..0.118 rows=1 loops=86952)
                                               Buffers: shared hit=2725463 read=252544 dirtied=3583 written=278
                                               ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.92 rows=1 width=4) (actual time=0.074..0.116 rows=1 loops=86952)
                                                     Index Cond: (l_partkey = partsupp.ps_partkey)
                                                     Filter: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1995-01-01'::date) AND (l_suppkey = partsupp.ps_suppkey))
                                                     Rows Removed by Filter: 29
                                                     Buffers: shared hit=2725463 read=252544 dirtied=3583 written=278
 Total runtime: 12899.094 ms
(42 rows)

COMMIT;
COMMIT