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 = 'VIETNAM'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1959380.07..1959380.07 rows=1 width=26) (actual time=45460.980..45461.000 rows=100 loops=1)
   Buffers: shared hit=13954957 read=582014 dirtied=766 written=1081
   ->  Sort  (cost=1959380.07..1959380.07 rows=1 width=26) (actual time=45460.977..45460.985 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13954957 read=582014 dirtied=766 written=1081
         ->  HashAggregate  (cost=1959380.05..1959380.06 rows=1 width=26) (actual time=45458.697..45459.841 rows=3987 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13954949 read=582014 dirtied=766 written=1081
               ->  Nested Loop Anti Join  (cost=2443.74..1959380.04 rows=1 width=26) (actual time=17.507..45397.393 rows=39303 loops=1)
                     Buffers: shared hit=13954949 read=582014 dirtied=766 written=1081
                     ->  Nested Loop Semi Join  (cost=2443.17..1959378.73 rows=1 width=34) (actual time=16.158..42117.357 rows=704500 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10425600 read=580576 dirtied=766 written=1079
                           ->  Nested Loop  (cost=2442.61..1436751.03 rows=391146 width=38) (actual time=16.137..36615.819 rows=731015 loops=1)
                                 Buffers: shared hit=6865272 read=479734 dirtied=760 written=740
                                 ->  Hash Join  (cost=2442.17..1014027.46 rows=803005 width=34) (actual time=16.114..27559.861 rows=1514284 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=840472 read=439032 dirtied=760 written=724
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..928274.11 rows=20075117 width=8) (actual time=0.097..19450.920 rows=37966584 loops=1)
                                             Buffers: shared hit=838623 read=439019 dirtied=760 written=724
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=15.961..15.961 rows=3987 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 282kB
                                             Buffers: shared hit=1846 read=13
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.284..14.837 rows=3987 loops=1)
                                                   Buffers: shared hit=1846 read=13
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.013..0.018 rows=1 loops=1)
                                                         Filter: (n_name = 'VIETNAM'::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=1.264..13.988 rows=3987 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1845
                                                         Buffers: shared hit=1845 read=13
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.968..0.968 rows=3987 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=1514284)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6024800 read=40702 written=16
                           ->  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=731015)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3560328 read=100842 dirtied=6 written=339
                     ->  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=704500)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3529349 read=1438 written=2
 Planning time: 10.509 ms
 Execution time: 45461.397 ms
(54 rows)

COMMIT;
COMMIT