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 = 'MOROCCO'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1971152.65..1971152.65 rows=1 width=26) (actual time=48345.066..48345.083 rows=100 loops=1)
   Buffers: shared hit=13794051 read=752262 dirtied=296 written=5602
   ->  Sort  (cost=1971152.65..1971152.65 rows=1 width=26) (actual time=48345.064..48345.071 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13794051 read=752262 dirtied=296 written=5602
         ->  HashAggregate  (cost=1971152.63..1971152.64 rows=1 width=26) (actual time=48342.802..48343.876 rows=3989 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13794043 read=752262 dirtied=296 written=5602
               ->  Nested Loop Anti Join  (cost=2443.74..1971152.62 rows=1 width=26) (actual time=17.099..48249.220 rows=39767 loops=1)
                     Buffers: shared hit=13794043 read=752262 dirtied=296 written=5602
                     ->  Nested Loop Semi Join  (cost=2443.17..1971151.31 rows=1 width=34) (actual time=14.887..45499.723 rows=704094 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10267488 read=750321 dirtied=296 written=5591
                           ->  Nested Loop  (cost=2442.61..1445342.26 rows=393479 width=38) (actual time=14.866..39757.749 rows=731009 loops=1)
                                 Buffers: shared hit=6769375 read=587348 dirtied=296 written=4423
                                 ->  Hash Join  (cost=2442.17..1020057.78 rows=807794 width=34) (actual time=14.826..30586.210 rows=1514172 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=767929 read=523995 dirtied=296 written=3553
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..933807.53 rows=20194855 width=8) (actual time=0.096..20213.261 rows=37965313 loops=1)
                                             Buffers: shared hit=766072 read=523982 dirtied=296 written=3553
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=14.671..14.671 rows=3990 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 282kB
                                             Buffers: shared hit=1854 read=13
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.226..13.656 rows=3990 loops=1)
                                                   Buffers: shared hit=1854 read=13
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.010..0.017 rows=1 loops=1)
                                                         Filter: (n_name = 'MOROCCO'::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=1.209..12.827 rows=3990 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1853
                                                         Buffers: shared hit=1853 read=13
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.907..0.907 rows=3990 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=0.005..0.005 rows=0 loops=1514172)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6001446 read=63353 written=870
                           ->  Index Scan using lineitem_l_orderkey_idx on lineitem l2  (cost=0.56..1.15 rows=15 width=8) (actual time=0.007..0.007 rows=1 loops=731009)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3498113 read=162973 written=1168
                     ->  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=704094)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3526555 read=1941 written=11
 Planning time: 10.542 ms
 Execution time: 48345.519 ms
(54 rows)

COMMIT;
COMMIT