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 = 'UNITED KINGDOM'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=4804074.34..4804074.35 rows=1 width=26) (actual time=105616.112..105616.134 rows=100 loops=1)
   Buffers: shared hit=10016768 read=1448111 dirtied=563 written=22089, temp read=161476 written=161470
   ->  Sort  (cost=4804074.34..4804074.35 rows=1 width=26) (actual time=105616.108..105616.117 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=10016768 read=1448111 dirtied=563 written=22089, temp read=161476 written=161470
         ->  HashAggregate  (cost=4804074.32..4804074.33 rows=1 width=26) (actual time=105610.577..105612.676 rows=3973 loops=1)
               Buffers: shared hit=10016760 read=1448111 dirtied=563 written=22089, temp read=161476 written=161470
               ->  Nested Loop Anti Join  (cost=2654504.08..4804074.32 rows=1 width=26) (actual time=37451.967..105492.992 rows=39497 loops=1)
                     Buffers: shared hit=10016760 read=1448111 dirtied=563 written=22089, temp read=161476 written=161470
                     ->  Nested Loop  (cost=2654504.08..4804059.42 rows=1 width=34) (actual time=37449.596..92590.712 rows=699887 loops=1)
                           Join Filter: (l1.l_orderkey = orders.o_orderkey)
                           Buffers: shared hit=7032746 read=916152 dirtied=563 written=506, temp read=161476 written=161470
                           ->  Hash Semi Join  (cost=2654504.08..4804057.46 rows=1 width=38) (actual time=37449.210..81002.004 rows=1451532 loops=1)
                                 Hash Cond: (l1.l_orderkey = l2.l_orderkey)
                                 Join Filter: (l2.l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Join Filter: 376263
                                 Buffers: shared hit=1335965 read=798862 dirtied=547 written=400, temp read=161476 written=161470
                                 ->  Hash Join  (cost=2441.58..1902544.79 rows=799724 width=34) (actual time=37.511..30150.873 rows=1505240 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=632916 read=435436
                                       ->  Seq Scan on lineitem l1  (cost=0.00..1817048.61 rows=20015296 width=8) (actual time=0.025..20960.389 rows=37928797 loops=1)
                                             Filter: (l_receiptdate > l_commitdate)
                                             Rows Removed by Filter: 22056532
                                             Buffers: shared hit=632381 read=434094
                                       ->  Hash  (cost=2391.58..2391.58 rows=4000 width=30) (actual time=37.381..37.381 rows=3973 loops=1)
                                             Buckets: 1024  Batches: 1  Memory Usage: 249kB
                                             Buffers: shared hit=532 read=1342
                                             ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=30) (actual time=1.336..35.399 rows=3973 loops=1)
                                                   Buffers: shared hit=532 read=1342
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.018..0.023 rows=1 loops=1)
                                                         Filter: (n_name = 'UNITED KINGDOM'::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=1.310..34.091 rows=3973 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Buffers: shared hit=531 read=1342
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=1.001..1.001 rows=3973 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=14
                                 ->  Hash  (cost=1666933.89..1666933.89 rows=60045889 width=8) (actual time=37394.473..37394.473 rows=59985329 loops=1)
                                       Buckets: 4194304  Batches: 4  Memory Usage: 586039kB
                                       Buffers: shared hit=703049 read=363426 dirtied=547 written=400, temp written=153747
                                       ->  Seq Scan on lineitem l2  (cost=0.00..1666933.89 rows=60045889 width=8) (actual time=0.013..18657.699 rows=59985329 loops=1)
                                             Buffers: shared hit=703049 read=363426 dirtied=547 written=400
                           ->  Index Scan using pk_orders on orders  (cost=0.00..1.94 rows=1 width=4) (actual time=0.007..0.007 rows=0 loops=1451532)
                                 Index Cond: (o_orderkey = l2.l_orderkey)
                                 Filter: (o_orderstatus = 'F'::bpchar)
                                 Rows Removed by Filter: 1
                                 Buffers: shared hit=5696781 read=117290 dirtied=16 written=106
                     ->  Index Scan using lineitem_l_orderkey_idx on lineitem l3  (cost=0.00..7.42 rows=5 width=8) (actual time=0.018..0.018 rows=1 loops=699887)
                           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=2984014 read=531959 written=21583
 Total runtime: 105618.064 ms
(56 rows)

COMMIT;
COMMIT