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=1964553.88..1964553.89 rows=1 width=26) (actual time=45414.262..45414.280 rows=100 loops=1)
   Buffers: shared hit=13882002 read=739846 written=2559
   ->  Sort  (cost=1964553.88..1964553.89 rows=1 width=26) (actual time=45414.260..45414.267 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13882002 read=739846 written=2559
         ->  HashAggregate  (cost=1964553.86..1964553.87 rows=1 width=26) (actual time=45410.719..45412.996 rows=4023 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13881994 read=739846 written=2559
               ->  Nested Loop Anti Join  (cost=2443.74..1964553.86 rows=1 width=26) (actual time=18.685..45332.587 rows=39936 loops=1)
                     Buffers: shared hit=13881994 read=739846 written=2559
                     ->  Nested Loop Semi Join  (cost=2443.17..1964552.55 rows=1 width=34) (actual time=14.860..42384.022 rows=708872 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10331241 read=737983 written=2554
                           ->  Nested Loop  (cost=2442.61..1440516.73 rows=392179 width=38) (actual time=14.837..37075.511 rows=735511 loops=1)
                                 Buffers: shared hit=6793145 read=592598 written=1640
                                 ->  Hash Join  (cost=2442.17..1016695.49 rows=805124 width=34) (actual time=14.711..27974.362 rows=1522743 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=764873 read=521625 written=1509
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..930722.28 rows=20128098 width=8) (actual time=0.097..18983.560 rows=37928558 loops=1)
                                             Buffers: shared hit=763015 read=521612 written=1508
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=14.566..14.566 rows=4023 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 284kB
                                             Buffers: shared hit=1855 read=13 written=1
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.272..13.450 rows=4023 loops=1)
                                                   Buffers: shared hit=1855 read=13 written=1
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.011..0.019 rows=1 loops=1)
                                                         Filter: (n_name = 'IRAN'::bpchar)
                                                         Rows Removed by Filter: 24
                                                         Buffers: shared hit=1
                                                   ->  Bitmap Heap Scan on supplier  (cost=79.29..2350.29 rows=4000 width=34) (actual time=1.255..12.607 rows=4023 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1854
                                                         Buffers: shared hit=1854 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=0.939..0.939 rows=4023 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=13 written=1
                                 ->  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=1522743)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6028272 read=70973 written=131
                           ->  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=735511)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3538096 read=145385 written=914
                     ->  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=708872)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3550753 read=1863 written=5
 Planning time: 10.431 ms
 Execution time: 45414.686 ms
(54 rows)

COMMIT;
COMMIT