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=4852002.73..4852002.73 rows=1 width=26) (actual time=100558.656..100558.676 rows=100 loops=1)
   Buffers: shared hit=9348628 read=2193434 written=321, temp read=161516 written=161510
   ->  Sort  (cost=4852002.73..4852002.73 rows=1 width=26) (actual time=100558.652..100558.659 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=9348628 read=2193434 written=321, temp read=161516 written=161510
         ->  HashAggregate  (cost=4852002.71..4852002.72 rows=1 width=26) (actual time=100553.611..100555.532 rows=3988 loops=1)
               Buffers: shared hit=9348620 read=2193434 written=321, temp read=161516 written=161510
               ->  Nested Loop Anti Join  (cost=2680975.39..4852002.70 rows=1 width=26) (actual time=34176.018..100451.047 rows=39939 loops=1)
                     Buffers: shared hit=9348620 read=2193434 written=321, temp read=161516 written=161510
                     ->  Nested Loop  (cost=2680975.39..4851987.56 rows=1 width=34) (actual time=34172.205..89434.000 rows=705285 loops=1)
                           Join Filter: (l1.l_orderkey = orders.o_orderkey)
                           Buffers: shared hit=6380216 read=1619201 written=104, temp read=161516 written=161510
                           ->  Hash Semi Join  (cost=2680975.39..4851985.57 rows=1 width=38) (actual time=34171.423..77246.500 rows=1458860 loops=1)
                                 Hash Cond: (l1.l_orderkey = l2.l_orderkey)
                                 Join Filter: (l2.l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Join Filter: 377710
                                 Buffers: shared hit=885243 read=1270852 written=2, temp read=161516 written=161510
                                 ->  Hash Join  (cost=2441.58..1921510.64 rows=807707 width=34) (actual time=25.470..31795.057 rows=1512878 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=596452 read=482523 written=2
                                       ->  Seq Scan on lineitem l1  (cost=0.00..1835185.45 rows=20215079 width=8) (actual time=0.033..22157.790 rows=37927978 loops=1)
                                             Filter: (l_receiptdate > l_commitdate)
                                             Rows Removed by Filter: 22056848
                                             Buffers: shared hit=594611 read=482509 written=2
                                       ->  Hash  (cost=2391.58..2391.58 rows=4000 width=30) (actual time=25.383..25.383 rows=3988 loops=1)
                                             Buckets: 1024  Batches: 1  Memory Usage: 250kB
                                             Buffers: shared hit=1838 read=14
                                             ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=30) (actual time=1.308..23.923 rows=3988 loops=1)
                                                   Buffers: shared hit=1838 read=14
                                                   ->  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=79.26..2350.26 rows=4000 width=34) (actual time=1.294..23.006 rows=3988 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Buffers: shared hit=1837 read=14
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=0.991..0.991 rows=3988 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=14
                                 ->  Hash  (cost=1683572.36..1683572.36 rows=60645236 width=8) (actual time=34128.062..34128.062 rows=59984826 loops=1)
                                       Buckets: 4194304  Batches: 4  Memory Usage: 585983kB
                                       Buffers: shared hit=288791 read=788329, temp written=153751
                                       ->  Seq Scan on lineitem l2  (cost=0.00..1683572.36 rows=60645236 width=8) (actual time=0.020..16730.352 rows=59984826 loops=1)
                                             Buffers: shared hit=288791 read=788329
                           ->  Index Scan using pk_orders on orders  (cost=0.00..1.97 rows=1 width=4) (actual time=0.008..0.008 rows=0 loops=1458860)
                                 Index Cond: (o_orderkey = l2.l_orderkey)
                                 Filter: (o_orderstatus = 'F'::bpchar)
                                 Rows Removed by Filter: 1
                                 Buffers: shared hit=5494973 read=348349 written=102
                     ->  Index Scan using lineitem_l_orderkey_idx on lineitem l3  (cost=0.00..7.55 rows=5 width=8) (actual time=0.015..0.015 rows=1 loops=705285)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: ((l_receiptdate > l_commitdate) AND (l_suppkey <> l1.l_suppkey))
                           Rows Removed by Filter: 1
                           Buffers: shared hit=2968404 read=574233 written=217
 Total runtime: 100560.037 ms
(56 rows)

COMMIT;
COMMIT