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=1961635.00..1961635.01 rows=1 width=26) (actual time=39294.764..39294.783 rows=100 loops=1)
   Buffers: shared hit=13652251 read=890909 dirtied=1190 written=392
   ->  Sort  (cost=1961635.00..1961635.01 rows=1 width=26) (actual time=39294.761..39294.768 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13652251 read=890909 dirtied=1190 written=392
         ->  HashAggregate  (cost=1961634.98..1961634.99 rows=1 width=26) (actual time=39292.704..39293.707 rows=3988 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13652243 read=890909 dirtied=1190 written=392
               ->  Nested Loop Anti Join  (cost=2443.74..1961634.98 rows=1 width=26) (actual time=16.237..39242.376 rows=39949 loops=1)
                     Buffers: shared hit=13652243 read=890909 dirtied=1190 written=392
                     ->  Nested Loop Semi Join  (cost=2443.17..1961633.67 rows=1 width=34) (actual time=16.085..36893.719 rows=705240 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10120066 read=888632 dirtied=1190 written=391
                           ->  Nested Loop  (cost=2442.61..1437305.55 rows=392410 width=38) (actual time=15.968..32294.861 rows=731552 loops=1)
                                 Buffers: shared hit=6621100 read=723746 dirtied=1190 written=317
                                 ->  Hash Join  (cost=2442.17..1014488.31 rows=803171 width=34) (actual time=15.845..24587.498 rows=1512799 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=640783 read=644636 dirtied=1190 written=292
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..928658.27 rows=20095126 width=8) (actual time=0.089..18178.327 rows=37929015 loops=1)
                                             Buffers: shared hit=638942 read=644623 dirtied=1190 written=292
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=15.717..15.717 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=1.092..14.738 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=0.009..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=1.076..13.897 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=0.816..0.816 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=0.004..0.005 rows=0 loops=1512799)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=5980317 read=79110 written=25
                           ->  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=731552)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3498966 read=164886 written=74
                     ->  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=705240)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3532177 read=2277 written=1
 Planning time: 9.892 ms
 Execution time: 39295.123 ms
(54 rows)

COMMIT;
COMMIT