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 = 'CHINA'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1951861.37..1951861.38 rows=1 width=26) (actual time=40237.473..40237.490 rows=100 loops=1)
   Buffers: shared hit=13282813 read=1254722
   ->  Sort  (cost=1951861.37..1951861.38 rows=1 width=26) (actual time=40237.471..40237.478 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13282813 read=1254722
         ->  HashAggregate  (cost=1951861.35..1951861.36 rows=1 width=26) (actual time=40235.463..40236.464 rows=3988 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13282805 read=1254722
               ->  Nested Loop Anti Join  (cost=2443.74..1951861.35 rows=1 width=26) (actual time=22.073..40188.057 rows=39978 loops=1)
                     Buffers: shared hit=13282805 read=1254722
                     ->  Nested Loop Semi Join  (cost=2443.17..1951860.04 rows=1 width=34) (actual time=21.926..37877.180 rows=705921 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=9747828 read=1251831
                           ->  Nested Loop  (cost=2442.61..1432155.02 rows=388982 width=38) (actual time=21.871..33337.184 rows=732233 loops=1)
                                 Buffers: shared hit=6245429 read=1086965
                                 ->  Hash Join  (cost=2442.17..1010711.77 rows=800611 width=34) (actual time=21.768..25160.299 rows=1514391 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=375558 read=890982
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..925206.79 rows=20015270 width=8) (actual time=0.101..18870.184 rows=37967116 loops=1)
                                             Buffers: shared hit=373717 read=890969
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=21.626..21.626 rows=3988 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 282kB
                                             Buffers: shared hit=1838 read=13
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.193..20.424 rows=3988 loops=1)
                                                   Buffers: shared hit=1838 read=13
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.010..0.014 rows=1 loops=1)
                                                         Filter: (n_name = 'CHINA'::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=1.176..19.542 rows=3988 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1837
                                                         Buffers: shared hit=1837 read=13
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.873..0.873 rows=3988 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=1514391)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=5869871 read=195983
                           ->  Index Scan using lineitem_l_orderkey_idx on lineitem l2  (cost=0.56..1.15 rows=15 width=8) (actual time=0.005..0.005 rows=1 loops=732233)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3502399 read=164866
                     ->  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=705921)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3534977 read=2891
 Planning time: 13.993 ms
 Execution time: 40237.834 ms
(54 rows)

COMMIT;
COMMIT