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 = 'ROMANIA'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=4852009.34..4852009.34 rows=1 width=26) (actual time=178204.170..178204.199 rows=100 loops=1)
   Buffers: shared hit=9765449 read=1875192 dirtied=1031 written=19675, temp read=161748 written=161742
   ->  Sort  (cost=4852009.34..4852009.34 rows=1 width=26) (actual time=178204.167..178204.181 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=9765449 read=1875192 dirtied=1031 written=19675, temp read=161748 written=161742
         ->  HashAggregate  (cost=4852009.32..4852009.33 rows=1 width=26) (actual time=178196.708..178199.192 rows=4029 loops=1)
               Buffers: shared hit=9765441 read=1875192 dirtied=1031 written=19675, temp read=161748 written=161742
               ->  Nested Loop Anti Join  (cost=2680964.09..4852009.31 rows=1 width=26) (actual time=63544.408..178042.552 rows=39732 loops=1)
                     Buffers: shared hit=9765441 read=1875192 dirtied=1031 written=19675, temp read=161748 written=161742
                     ->  Nested Loop  (cost=2680964.09..4851994.17 rows=1 width=34) (actual time=63539.702..153899.251 rows=712193 loops=1)
                           Join Filter: (l1.l_orderkey = orders.o_orderkey)
                           Buffers: shared hit=6810514 read=1252748 dirtied=1031 written=2242, temp read=161748 written=161742
                           ->  Hash Semi Join  (cost=2680964.09..4851992.18 rows=1 width=38) (actual time=63539.633..132239.310 rows=1474773 loops=1)
                                 Hash Cond: (l1.l_orderkey = l2.l_orderkey)
                                 Join Filter: (l2.l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Join Filter: 381530
                                 Buffers: shared hit=922430 read=1233669 dirtied=971 written=850, temp read=161748 written=161742
                                 ->  Hash Join  (cost=2441.58..1921513.87 rows=808598 width=34) (actual time=56.315..54083.134 rows=1529041 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=445877 read=633102 written=3
                                       ->  Seq Scan on lineitem l1  (cost=0.00..1835180.29 rows=20214941 width=8) (actual time=0.044..37336.231 rows=37965800 loops=1)
                                             Filter: (l_receiptdate > l_commitdate)
                                             Rows Removed by Filter: 22079072
                                             Buffers: shared hit=444032 read=633088 written=3
                                       ->  Hash  (cost=2391.58..2391.58 rows=4000 width=30) (actual time=56.201..56.201 rows=4029 loops=1)
                                             Buckets: 1024  Batches: 1  Memory Usage: 252kB
                                             Buffers: shared hit=1842 read=14
                                             ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=30) (actual time=2.689..54.021 rows=4029 loops=1)
                                                   Buffers: shared hit=1842 read=14
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.011..0.019 rows=1 loops=1)
                                                         Filter: (n_name = 'ROMANIA'::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=2.671..52.774 rows=4029 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Buffers: shared hit=1841 read=14
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=2.269..2.269 rows=4029 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=14
                                 ->  Hash  (cost=1683568.23..1683568.23 rows=60644823 width=8) (actual time=63459.933..63459.933 rows=60044872 loops=1)
                                       Buckets: 4194304  Batches: 4  Memory Usage: 586575kB
                                       Buffers: shared hit=476553 read=600567 dirtied=971 written=847, temp written=153905
                                       ->  Seq Scan on lineitem l2  (cost=0.00..1683568.23 rows=60644823 width=8) (actual time=0.049..36534.005 rows=60044872 loops=1)
                                             Buffers: shared hit=476553 read=600567 dirtied=971 written=847
                           ->  Index Scan using pk_orders on orders  (cost=0.00..1.97 rows=1 width=4) (actual time=0.013..0.014 rows=0 loops=1474773)
                                 Index Cond: (o_orderkey = l2.l_orderkey)
                                 Filter: (o_orderstatus = 'F'::bpchar)
                                 Rows Removed by Filter: 1
                                 Buffers: shared hit=5888084 read=19079 dirtied=60 written=1392
                     ->  Index Scan using lineitem_l_orderkey_idx on lineitem l3  (cost=0.00..7.55 rows=5 width=8) (actual time=0.033..0.033 rows=1 loops=712193)
                           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=2954927 read=622444 written=17433
 Total runtime: 178205.761 ms
(56 rows)

COMMIT;
COMMIT