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 = 'SAUDI ARABIA'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1953012.70..1953012.71 rows=1 width=26) (actual time=44137.547..44137.565 rows=100 loops=1)
   Buffers: shared hit=13762122 read=841066 dirtied=838 written=1405
   ->  Sort  (cost=1953012.70..1953012.71 rows=1 width=26) (actual time=44137.544..44137.549 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13762122 read=841066 dirtied=838 written=1405
         ->  HashAggregate  (cost=1953012.68..1953012.69 rows=1 width=26) (actual time=44134.193..44136.320 rows=4009 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13762114 read=841066 dirtied=838 written=1405
               ->  Nested Loop Anti Join  (cost=2443.74..1953012.68 rows=1 width=26) (actual time=13.670..44053.134 rows=39496 loops=1)
                     Buffers: shared hit=13762114 read=841066 dirtied=838 written=1405
                     ->  Nested Loop Semi Join  (cost=2443.17..1953011.37 rows=1 width=34) (actual time=13.556..41111.479 rows=708298 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10214396 read=838968 dirtied=838 written=1398
                           ->  Nested Loop  (cost=2442.61..1433227.14 rows=389033 width=38) (actual time=13.491..35936.889 rows=735251 loops=1)
                                 Buffers: shared hit=6677991 read=693623 dirtied=838 written=1264
                                 ->  Hash Join  (cost=2442.17..1011791.81 rows=800583 width=34) (actual time=13.445..26990.729 rows=1523908 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=662511 read=605288 dirtied=838 written=1209
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..926212.41 rows=20035191 width=8) (actual time=0.079..18547.486 rows=37966905 loops=1)
                                             Buffers: shared hit=660666 read=605275 dirtied=838 written=1208
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=13.314..13.314 rows=4010 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 283kB
                                             Buffers: shared hit=1842 read=13 written=1
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.311..12.232 rows=4010 loops=1)
                                                   Buffers: shared hit=1842 read=13 written=1
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.011..0.015 rows=1 loops=1)
                                                         Filter: (n_name = 'SAUDI ARABIA'::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=1.292..11.422 rows=4010 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1841
                                                         Buffers: shared hit=1841 read=13 written=1
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.990..0.990 rows=4010 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=13 written=1
                                 ->  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=1523908)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6015480 read=88335 written=55
                           ->  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=735251)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3536405 read=145345 written=134
                     ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l3  (cost=0.56..0.91 rows=5 width=8) (actual time=0.004..0.004 rows=1 loops=708298)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3547718 read=2098 written=7
 Planning time: 9.992 ms
 Execution time: 44137.980 ms
(54 rows)

COMMIT;
COMMIT