BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	s_name,
	count(*) as numwait
from
	supplier,
	lineitem l1,
	orders,
	nation
where
	s_suppkey = l1.l_suppkey
	and o_orderkey = l1.l_orderkey
	and o_orderstatus = 'F'
	and l1.l_receiptdate > l1.l_commitdate
	and exists (
		select
			*
		from
			lineitem l2
		where
			l2.l_orderkey = l1.l_orderkey
			and l2.l_suppkey <> l1.l_suppkey
	)
	and not exists (
		select
			*
		from
			lineitem l3
		where
			l3.l_orderkey = l1.l_orderkey
			and l3.l_suppkey <> l1.l_suppkey
			and l3.l_receiptdate > l3.l_commitdate
	)
	and s_nationkey = n_nationkey
	and n_name = 'JAPAN'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1953835.79..1953835.80 rows=1 width=26) (actual time=40214.382..40214.398 rows=100 loops=1)
   Buffers: shared hit=13630363 read=980403 dirtied=1068 written=2958
   ->  Sort  (cost=1953835.79..1953835.80 rows=1 width=26) (actual time=40214.380..40214.387 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13630363 read=980403 dirtied=1068 written=2958
         ->  HashAggregate  (cost=1953835.77..1953835.78 rows=1 width=26) (actual time=40211.756..40213.318 rows=4009 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13630355 read=980403 dirtied=1068 written=2958
               ->  Nested Loop Anti Join  (cost=2443.74..1953835.77 rows=1 width=26) (actual time=17.351..40151.263 rows=40108 loops=1)
                     Buffers: shared hit=13630355 read=980403 dirtied=1068 written=2958
                     ->  Nested Loop Semi Join  (cost=2443.17..1953834.46 rows=1 width=34) (actual time=15.701..37390.992 rows=709178 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10078257 read=978273 dirtied=1068 written=2956
                           ->  Nested Loop  (cost=2442.61..1433596.82 rows=389373 width=38) (actual time=15.682..32538.917 rows=736160 loops=1)
                                 Buffers: shared hit=6544883 read=824601 dirtied=1065 written=2262
                                 ->  Hash Join  (cost=2442.17..1011723.93 rows=801415 width=34) (actual time=15.658..24717.420 rows=1523341 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=573680 read=694115 dirtied=1065 written=1150
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..926135.54 rows=20035370 width=8) (actual time=0.076..17962.050 rows=37966905 loops=1)
                                             Buffers: shared hit=571963 read=693978 dirtied=1065 written=1144
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=15.535..15.535 rows=4009 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 283kB
                                             Buffers: shared hit=1714 read=137 written=6
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.146..14.498 rows=4009 loops=1)
                                                   Buffers: shared hit=1714 read=137 written=6
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.009..0.017 rows=1 loops=1)
                                                         Filter: (n_name = 'JAPAN'::bpchar)
                                                         Rows Removed by Filter: 24
                                                         Buffers: shared hit=1
                                                   ->  Bitmap Heap Scan on supplier  (cost=79.29..2350.29 rows=4000 width=34) (actual time=1.131..13.701 rows=4009 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1837
                                                         Buffers: shared hit=1713 read=137 written=6
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.855..0.855 rows=4009 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=13
                                 ->  Index Scan using orders_o_orderkey_o_orderdate_idx on orders  (cost=0.43..0.52 rows=1 width=4) (actual time=0.004..0.005 rows=0 loops=1523341)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=5971203 read=130486 written=1112
                           ->  Index Scan using lineitem_l_orderkey_idx on lineitem l2  (cost=0.56..1.15 rows=15 width=8) (actual time=0.006..0.006 rows=1 loops=736160)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3533374 read=153672 dirtied=3 written=694
                     ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l3  (cost=0.56..0.91 rows=5 width=8) (actual time=0.003..0.003 rows=1 loops=709178)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3552098 read=2130 written=2
 Planning time: 9.236 ms
 Execution time: 40214.743 ms
(54 rows)

COMMIT;
COMMIT