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 = 'CANADA'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1970318.32..1970318.32 rows=1 width=26) (actual time=51042.067..51042.086 rows=100 loops=1)
   Buffers: shared hit=13890717 read=875645 dirtied=218 written=7896
   ->  Sort  (cost=1970318.32..1970318.32 rows=1 width=26) (actual time=51042.063..51042.071 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13890717 read=875645 dirtied=218 written=7896
         ->  HashAggregate  (cost=1970318.30..1970318.31 rows=1 width=26) (actual time=51038.443..51040.713 rows=4054 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13890709 read=875645 dirtied=218 written=7896
               ->  Nested Loop Anti Join  (cost=2443.74..1970318.29 rows=1 width=26) (actual time=27.007..50956.496 rows=40204 loops=1)
                     Buffers: shared hit=13890709 read=875645 dirtied=218 written=7896
                     ->  Nested Loop Semi Join  (cost=2443.17..1970316.98 rows=1 width=34) (actual time=18.561..47546.877 rows=716635 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10301453 read=873512 dirtied=218 written=7870
                           ->  Nested Loop  (cost=2442.61..1446228.69 rows=392183 width=38) (actual time=18.534..41550.418 rows=743939 loops=1)
                                 Buffers: shared hit=6731455 read=717700 dirtied=218 written=6458
                                 ->  Hash Join  (cost=2442.17..1020514.71 rows=808598 width=34) (actual time=18.387..31263.301 rows=1538034 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=660592 read=628059 written=5938
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..934181.08 rows=20214944 width=8) (actual time=0.108..21202.563 rows=37965800 loops=1)
                                             Buffers: shared hit=658733 read=628048 written=5938
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=18.170..18.170 rows=4054 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 286kB
                                             Buffers: shared hit=1856 read=11
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.286..17.000 rows=4054 loops=1)
                                                   Buffers: shared hit=1856 read=11
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.021..0.030 rows=1 loops=1)
                                                         Filter: (n_name = 'CANADA'::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=1.258..16.154 rows=4054 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1853
                                                         Buffers: shared hit=1855 read=11
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.956..0.956 rows=4054 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared hit=2 read=11
                                 ->  Index Scan using orders_o_orderkey_o_orderdate_idx on orders  (cost=0.43..0.52 rows=1 width=4) (actual time=0.006..0.006 rows=0 loops=1538034)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6070863 read=89641 dirtied=218 written=520
                           ->  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=743939)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3569998 read=155812 written=1412
                     ->  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=716635)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3589256 read=2133 written=26
 Planning time: 10.937 ms
 Execution time: 51042.573 ms
(54 rows)

COMMIT;
COMMIT