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 = 'IRAN'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=4818442.32..4818442.32 rows=1 width=26) (actual time=109593.793..109593.812 rows=100 loops=1)
   Buffers: shared hit=10132814 read=1460526 dirtied=855 written=10210, temp read=161734 written=161728
   ->  Sort  (cost=4818442.32..4818442.32 rows=1 width=26) (actual time=109593.785..109593.791 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=10132814 read=1460526 dirtied=855 written=10210, temp read=161734 written=161728
         ->  HashAggregate  (cost=4818442.30..4818442.31 rows=1 width=26) (actual time=109588.961..109590.888 rows=4023 loops=1)
               Buffers: shared hit=10132806 read=1460526 dirtied=855 written=10210, temp read=161734 written=161728
               ->  Nested Loop Anti Join  (cost=2662439.50..4818442.29 rows=1 width=26) (actual time=38892.147..109480.825 rows=39972 loops=1)
                     Buffers: shared hit=10132806 read=1460526 dirtied=855 written=10210, temp read=161734 written=161728
                     ->  Nested Loop  (cost=2662439.50..4818427.32 rows=1 width=34) (actual time=38889.904..97970.141 rows=709756 loops=1)
                           Join Filter: (l1.l_orderkey = orders.o_orderkey)
                           Buffers: shared hit=7164355 read=864062 dirtied=674 written=3698, temp read=161734 written=161728
                           ->  Hash Semi Join  (cost=2662439.50..4818425.36 rows=1 width=38) (actual time=38889.728..87529.076 rows=1469799 loops=1)
                                 Hash Cond: (l1.l_orderkey = l2.l_orderkey)
                                 Join Filter: (l2.l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Join Filter: 381803
                                 Buffers: shared hit=1340941 read=800263 dirtied=674 written=718, temp read=161734 written=161728
                                 ->  Hash Join  (cost=2441.58..1908230.09 rows=802117 width=34) (actual time=38.307..33536.956 rows=1524457 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=813937 read=257601 dirtied=659 written=718
                                       ->  Seq Scan on lineitem l1  (cost=0.00..1822485.40 rows=20075184 width=8) (actual time=0.022..22753.183 rows=37966584 loops=1)
                                             Filter: (l_receiptdate > l_commitdate)
                                             Rows Removed by Filter: 22078719
                                             Buffers: shared hit=813931 read=255735 dirtied=659 written=718
                                       ->  Hash  (cost=2391.58..2391.58 rows=4000 width=30) (actual time=38.252..38.252 rows=4023 loops=1)
                                             Buckets: 1024  Batches: 1  Memory Usage: 252kB
                                             Buffers: shared hit=3 read=1866
                                             ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=30) (actual time=1.279..36.652 rows=4023 loops=1)
                                                   Buffers: shared hit=3 read=1866
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.009..0.016 rows=1 loops=1)
                                                         Filter: (n_name = 'IRAN'::bpchar)
                                                         Rows Removed by Filter: 24
                                                         Buffers: shared hit=1
                                                   ->  Bitmap Heap Scan on supplier  (cost=79.26..2350.26 rows=4000 width=34) (actual time=1.265..35.629 rows=4023 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Buffers: shared hit=2 read=1866
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=0.962..0.962 rows=4023 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=14
                                 ->  Hash  (cost=1671921.52..1671921.52 rows=60225552 width=8) (actual time=38820.836..38820.836 rows=60045303 loops=1)
                                       Buckets: 4194304  Batches: 4  Memory Usage: 586635kB
                                       Buffers: shared hit=527004 read=542662 dirtied=15, temp written=153901
                                       ->  Seq Scan on lineitem l2  (cost=0.00..1671921.52 rows=60225552 width=8) (actual time=0.014..19444.113 rows=60045303 loops=1)
                                             Buffers: shared hit=527004 read=542662 dirtied=15
                           ->  Index Scan using pk_orders on orders  (cost=0.00..1.95 rows=1 width=4) (actual time=0.006..0.007 rows=0 loops=1469799)
                                 Index Cond: (o_orderkey = l2.l_orderkey)
                                 Filter: (o_orderstatus = 'F'::bpchar)
                                 Rows Removed by Filter: 1
                                 Buffers: shared hit=5823414 read=63799 written=2980
                     ->  Index Scan using lineitem_l_orderkey_idx on lineitem l3  (cost=0.00..7.46 rows=5 width=8) (actual time=0.016..0.016 rows=1 loops=709756)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: ((l_receiptdate > l_commitdate) AND (l_suppkey <> l1.l_suppkey))
                           Rows Removed by Filter: 1
                           Buffers: shared hit=2968451 read=596464 dirtied=181 written=6512
 Total runtime: 109595.139 ms
(56 rows)

COMMIT;
COMMIT