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 = 'UNITED KINGDOM'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1964759.34..1964759.34 rows=1 width=26) (actual time=44702.113..44702.129 rows=100 loops=1)
   Buffers: shared hit=13693797 read=773817 dirtied=1509 written=9414
   ->  Sort  (cost=1964759.34..1964759.34 rows=1 width=26) (actual time=44702.111..44702.119 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13693797 read=773817 dirtied=1509 written=9414
         ->  HashAggregate  (cost=1964759.32..1964759.33 rows=1 width=26) (actual time=44699.722..44700.875 rows=3973 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13693789 read=773817 dirtied=1509 written=9414
               ->  Nested Loop Anti Join  (cost=2443.74..1964759.31 rows=1 width=26) (actual time=17.233..44641.668 rows=39522 loops=1)
                     Buffers: shared hit=13693789 read=773817 dirtied=1509 written=9414
                     ->  Nested Loop Semi Join  (cost=2443.17..1964758.01 rows=1 width=34) (actual time=16.385..42037.996 rows=699894 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10188004 read=771818 dirtied=1509 written=9392
                           ->  Nested Loop  (cost=2442.61..1441808.10 rows=391355 width=38) (actual time=16.301..36703.302 rows=726133 loops=1)
                                 Buffers: shared hit=6715934 read=607466 dirtied=1509 written=7788
                                 ->  Hash Join  (cost=2442.17..1017816.80 rows=805362 width=34) (actual time=16.267..27791.811 rows=1505326 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=762498 read=531428 dirtied=1509 written=6527
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..931741.16 rows=20154777 width=8) (actual time=0.119..20075.674 rows=37927599 loops=1)
                                             Buffers: shared hit=760635 read=531415 dirtied=1509 written=6527
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=16.046..16.046 rows=3973 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 281kB
                                             Buffers: shared hit=1860 read=13
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.240..14.818 rows=3973 loops=1)
                                                   Buffers: shared hit=1860 read=13
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.012..0.017 rows=1 loops=1)
                                                         Filter: (n_name = 'UNITED KINGDOM'::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=1.223..14.063 rows=3973 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1859
                                                         Buffers: shared hit=1859 read=13
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.925..0.925 rows=3973 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=13
                                 ->  Index Scan using pk_orders on orders  (cost=0.43..0.52 rows=1 width=4) (actual time=0.005..0.005 rows=0 loops=1505326)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=5953436 read=76038 written=1261
                           ->  Index Scan using pk_lineitem on lineitem l2  (cost=0.56..1.15 rows=15 width=8) (actual time=0.006..0.006 rows=1 loops=726133)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3472070 read=164352 written=1604
                     ->  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=699894)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3505785 read=1999 written=22
 Planning time: 10.280 ms
 Execution time: 44702.581 ms
(54 rows)

COMMIT;
COMMIT