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=1972287.34..1972287.34 rows=1 width=26) (actual time=51654.965..51654.988 rows=100 loops=1)
   Buffers: shared hit=14008371 read=553041 written=1735
   ->  Sort  (cost=1972287.34..1972287.34 rows=1 width=26) (actual time=51654.961..51654.967 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=14008371 read=553041 written=1735
         ->  HashAggregate  (cost=1972287.32..1972287.33 rows=1 width=26) (actual time=51651.347..51653.619 rows=3988 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=14008363 read=553041 written=1735
               ->  Nested Loop Anti Join  (cost=2443.74..1972287.31 rows=1 width=26) (actual time=23.527..51558.921 rows=39972 loops=1)
                     Buffers: shared hit=14008363 read=553041 written=1735
                     ->  Nested Loop Semi Join  (cost=2443.17..1972286.00 rows=1 width=34) (actual time=23.238..47995.876 rows=705961 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10471568 read=551783 written=1731
                           ->  Nested Loop  (cost=2442.61..1447667.20 rows=392572 width=38) (actual time=23.148..41867.251 rows=732310 loops=1)
                                 Buffers: shared hit=6915415 read=440293 written=1465
                                 ->  Hash Join  (cost=2442.17..1021524.67 rows=809400 width=34) (actual time=22.971..31439.658 rows=1514394 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=913865 read=376055 written=1374
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..935107.85 rows=20234988 width=8) (actual time=0.128..20505.150 rows=37966174 loops=1)
                                             Buffers: shared hit=912024 read=376042 written=1374
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=22.769..22.769 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=1.752..20.709 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=0.017..0.023 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=1.724..19.087 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=1.346..1.346 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=0.006..0.006 rows=0 loops=1514394)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6001550 read=64238 written=91
                           ->  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=732310)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3556153 read=111490 written=266
                     ->  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=705961)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3536795 read=1258 written=4
 Planning time: 17.098 ms
 Execution time: 51655.554 ms
(54 rows)

COMMIT;
COMMIT