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 = 'PERU'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1966711.60..1966711.61 rows=1 width=26) (actual time=43481.239..43481.257 rows=100 loops=1)
   Buffers: shared hit=13838519 read=703794 dirtied=966 written=2446
   ->  Sort  (cost=1966711.60..1966711.61 rows=1 width=26) (actual time=43481.236..43481.241 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13838519 read=703794 dirtied=966 written=2446
         ->  HashAggregate  (cost=1966711.58..1966711.59 rows=1 width=26) (actual time=43478.989..43480.067 rows=3991 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13838511 read=703794 dirtied=966 written=2446
               ->  Nested Loop Anti Join  (cost=2443.74..1966711.58 rows=1 width=26) (actual time=14.922..43421.927 rows=39286 loops=1)
                     Buffers: shared hit=13838511 read=703794 dirtied=966 written=2446
                     ->  Nested Loop Semi Join  (cost=2443.17..1966710.27 rows=1 width=34) (actual time=14.907..40759.934 rows=704383 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10310080 read=702078 dirtied=966 written=2443
                           ->  Nested Loop  (cost=2442.61..1443235.21 rows=391740 width=38) (actual time=14.829..35318.285 rows=731058 loops=1)
                                 Buffers: shared hit=6778769 read=572681 dirtied=966 written=1320
                                 ->  Hash Join  (cost=2442.17..1018819.67 rows=806155 width=34) (actual time=14.808..26800.270 rows=1514319 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=788621 read=497350 dirtied=966 written=581
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..932661.64 rows=20174633 width=8) (actual time=0.100..19284.648 rows=37927367 loops=1)
                                             Buffers: shared hit=786775 read=497337 dirtied=966 written=581
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=14.641..14.641 rows=3991 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 282kB
                                             Buffers: shared hit=1843 read=13
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.214..13.560 rows=3991 loops=1)
                                                   Buffers: shared hit=1843 read=13
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.012..0.017 rows=1 loops=1)
                                                         Filter: (n_name = 'PERU'::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=1.196..12.809 rows=3991 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1842
                                                         Buffers: shared hit=1842 read=13
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.897..0.897 rows=3991 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=13
                                 ->  Index Scan using pk_orders on orders  (cost=0.43..0.52 rows=1 width=4) (actual time=0.005..0.005 rows=0 loops=1514319)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=5990148 read=75331 written=739
                           ->  Index Scan using pk_lineitem on lineitem l2  (cost=0.56..1.15 rows=15 width=8) (actual time=0.007..0.007 rows=1 loops=731058)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3531311 read=129397 written=1123
                     ->  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=704383)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3528431 read=1716 written=3
 Planning time: 9.853 ms
 Execution time: 43481.616 ms
(54 rows)

COMMIT;
COMMIT