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 = 'ALGERIA'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=4832800.52..4832800.53 rows=1 width=26) (actual time=233405.504..233405.535 rows=100 loops=1)
   Buffers: shared hit=9466493 read=1931183 dirtied=145 written=15313, temp read=161558 written=161552
   ->  Sort  (cost=4832800.52..4832800.53 rows=1 width=26) (actual time=233405.500..233405.510 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=9466493 read=1931183 dirtied=145 written=15313, temp read=161558 written=161552
         ->  HashAggregate  (cost=4832800.50..4832800.51 rows=1 width=26) (actual time=233398.290..233400.572 rows=3934 loops=1)
               Buffers: shared hit=9466485 read=1931183 dirtied=145 written=15313, temp read=161558 written=161552
               ->  Nested Loop Anti Join  (cost=2670358.61..4832800.50 rows=1 width=26) (actual time=73837.088..233223.997 rows=39161 loops=1)
                     Buffers: shared hit=9466485 read=1931183 dirtied=145 written=15313, temp read=161558 written=161552
                     ->  Nested Loop  (cost=2670358.61..4832785.45 rows=1 width=34) (actual time=73832.506..198609.459 rows=694895 loops=1)
                           Join Filter: (l1.l_orderkey = orders.o_orderkey)
                           Buffers: shared hit=6575190 read=1332200 written=527, temp read=161558 written=161552
                           ->  Hash Semi Join  (cost=2670358.61..4832783.48 rows=1 width=38) (actual time=73832.103..164086.152 rows=1437988 loops=1)
                                 Hash Cond: (l1.l_orderkey = l2.l_orderkey)
                                 Join Filter: (l2.l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Join Filter: 373789
                                 Buffers: shared hit=834400 read=1313174 written=46, temp read=161558 written=161552
                                 ->  Hash Join  (cost=2441.58..1913913.06 rows=805130 width=34) (actual time=80.197..76808.923 rows=1491377 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=453870 read=620848 written=46
                                       ->  Seq Scan on lineitem l1  (cost=0.00..1827914.35 rows=20134889 width=8) (actual time=0.111..54072.683 rows=37966100 loops=1)
                                             Filter: (l_receiptdate > l_commitdate)
                                             Rows Removed by Filter: 22079210
                                             Buffers: shared hit=452021 read=620835 written=46
                                       ->  Hash  (cost=2391.58..2391.58 rows=4000 width=30) (actual time=79.901..79.901 rows=3934 loops=1)
                                             Buckets: 1024  Batches: 1  Memory Usage: 246kB
                                             Buffers: shared hit=1846 read=13
                                             ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=30) (actual time=1.433..75.482 rows=3934 loops=1)
                                                   Buffers: shared hit=1846 read=13
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.010..0.020 rows=1 loops=1)
                                                         Filter: (n_name = 'ALGERIA'::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=1.416..73.880 rows=3934 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Buffers: shared hit=1845 read=13
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=1.106..1.106 rows=3934 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=13
                                 ->  Hash  (cost=1676902.68..1676902.68 rows=60404668 width=8) (actual time=73729.534..73729.534 rows=60045310 loops=1)
                                       Buckets: 4194304  Batches: 4  Memory Usage: 586609kB
                                       Buffers: shared hit=380530 read=692326, temp written=153904
                                       ->  Seq Scan on lineitem l2  (cost=0.00..1676902.68 rows=60404668 width=8) (actual time=0.021..49075.961 rows=60045310 loops=1)
                                             Buffers: shared hit=380530 read=692326
                           ->  Index Scan using orders_o_orderkey_o_orderdate_idx on orders  (cost=0.00..1.96 rows=1 width=4) (actual time=0.022..0.023 rows=0 loops=1437988)
                                 Index Cond: (o_orderkey = l2.l_orderkey)
                                 Filter: (o_orderstatus = 'F'::bpchar)
                                 Rows Removed by Filter: 1
                                 Buffers: shared hit=5740790 read=19026 written=481
                     ->  Index Scan using lineitem_l_orderkey_idx on lineitem l3  (cost=0.00..7.50 rows=5 width=8) (actual time=0.049..0.049 rows=1 loops=694895)
                           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=2891295 read=598983 dirtied=145 written=14786
 Total runtime: 233406.957 ms
(56 rows)

COMMIT;
COMMIT