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 = 'KENYA'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=4856779.29..4856779.29 rows=1 width=26) (actual time=125089.255..125089.275 rows=100 loops=1)
   Buffers: shared hit=10105669 read=1580612 dirtied=296 written=3099, temp read=161796 written=161790
   ->  Sort  (cost=4856779.29..4856779.29 rows=1 width=26) (actual time=125089.251..125089.260 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=10105669 read=1580612 dirtied=296 written=3099, temp read=161796 written=161790
         ->  HashAggregate  (cost=4856779.27..4856779.28 rows=1 width=26) (actual time=125084.513..125086.464 rows=4044 loops=1)
               Buffers: shared hit=10105661 read=1580612 dirtied=296 written=3099, temp read=161796 written=161790
               ->  Nested Loop Anti Join  (cost=2683612.31..4856779.26 rows=1 width=26) (actual time=40734.583..124960.336 rows=39695 loops=1)
                     Buffers: shared hit=10105661 read=1580612 dirtied=296 written=3099, temp read=161796 written=161790
                     ->  Nested Loop  (cost=2683612.31..4856764.09 rows=1 width=34) (actual time=40732.408..112077.378 rows=715272 loops=1)
                           Join Filter: (l1.l_orderkey = orders.o_orderkey)
                           Buffers: shared hit=6980437 read=1113238 dirtied=170 written=247, temp read=161796 written=161790
                           ->  Hash Semi Join  (cost=2683612.31..4856762.11 rows=1 width=38) (actual time=40731.461..98851.022 rows=1481846 loops=1)
                                 Hash Cond: (l1.l_orderkey = l2.l_orderkey)
                                 Join Filter: (l2.l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Join Filter: 384073
                                 Buffers: shared hit=1047540 read=1110691 dirtied=170 written=238, temp read=161796 written=161790
                                 ->  Hash Join  (cost=2441.58..1923403.80 rows=808522 width=34) (actual time=26.612..43416.095 rows=1536595 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=349241 read=730802 written=102
                                       ->  Seq Scan on lineitem l1  (cost=0.00..1836996.19 rows=20234885 width=8) (actual time=0.043..29250.212 rows=37966174 loops=1)
                                             Filter: (l_receiptdate > l_commitdate)
                                             Rows Removed by Filter: 22078820
                                             Buffers: shared hit=347400 read=730788 written=102
                                       ->  Hash  (cost=2391.58..2391.58 rows=4000 width=30) (actual time=26.514..26.514 rows=4044 loops=1)
                                             Buckets: 1024  Batches: 1  Memory Usage: 253kB
                                             Buffers: shared hit=1838 read=14
                                             ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=30) (actual time=1.814..24.386 rows=4044 loops=1)
                                                   Buffers: shared hit=1838 read=14
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.010..0.017 rows=1 loops=1)
                                                         Filter: (n_name = 'KENYA'::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=1.796..22.901 rows=4044 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=1.438..1.438 rows=4044 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=14
                                 ->  Hash  (cost=1685234.55..1685234.55 rows=60704655 width=8) (actual time=40680.925..40680.925 rows=60044994 loops=1)
                                       Buckets: 4194304  Batches: 4  Memory Usage: 586568kB
                                       Buffers: shared hit=698299 read=379889 dirtied=170 written=136, temp written=153905
                                       ->  Seq Scan on lineitem l2  (cost=0.00..1685234.55 rows=60704655 width=8) (actual time=0.050..20110.429 rows=60044994 loops=1)
                                             Buffers: shared hit=698299 read=379889 dirtied=170 written=136
                           ->  Index Scan using pk_orders on orders  (cost=0.00..1.98 rows=1 width=4) (actual time=0.008..0.008 rows=0 loops=1481846)
                                 Index Cond: (o_orderkey = l2.l_orderkey)
                                 Filter: (o_orderstatus = 'F'::bpchar)
                                 Rows Removed by Filter: 1
                                 Buffers: shared hit=5932897 read=2547 written=9
                     ->  Index Scan using lineitem_l_orderkey_idx on lineitem l3  (cost=0.00..7.56 rows=5 width=8) (actual time=0.017..0.017 rows=1 loops=715272)
                           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=3125224 read=467374 dirtied=126 written=2852
 Total runtime: 125090.548 ms
(56 rows)

COMMIT;
COMMIT