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 = 'SAUDI ARABIA'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1956580.80..1956580.81 rows=1 width=26) (actual time=52370.357..52370.376 rows=100 loops=1)
   Buffers: shared hit=13859336 read=755112 dirtied=992 written=1411
   ->  Sort  (cost=1956580.80..1956580.81 rows=1 width=26) (actual time=52370.354..52370.362 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13859336 read=755112 dirtied=992 written=1411
         ->  HashAggregate  (cost=1956580.78..1956580.79 rows=1 width=26) (actual time=52367.840..52369.128 rows=4009 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13859328 read=755112 dirtied=992 written=1411
               ->  Nested Loop Anti Join  (cost=2443.74..1956580.78 rows=1 width=26) (actual time=17.995..52270.238 rows=39479 loops=1)
                     Buffers: shared hit=13859328 read=755112 dirtied=992 written=1411
                     ->  Nested Loop Semi Join  (cost=2443.17..1956579.47 rows=1 width=34) (actual time=17.859..48877.192 rows=708243 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10311792 read=753105 dirtied=992 written=1409
                           ->  Nested Loop  (cost=2442.61..1436192.16 rows=389469 width=38) (actual time=17.831..42789.186 rows=735195 loops=1)
                                 Buffers: shared hit=6765550 read=617387 dirtied=991 written=1257
                                 ->  Hash Join  (cost=2442.17..1013470.00 rows=803002 width=34) (actual time=17.779..32898.585 rows=1523818 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=705138 read=574362 dirtied=738 written=1240
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..927716.94 rows=20075050 width=8) (actual time=0.102..21676.142 rows=37966584 loops=1)
                                             Buffers: shared hit=703293 read=574349 dirtied=738 written=1240
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=17.615..17.615 rows=4010 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 283kB
                                             Buffers: shared hit=1842 read=13
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.207..16.559 rows=4010 loops=1)
                                                   Buffers: shared hit=1842 read=13
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.011..0.015 rows=1 loops=1)
                                                         Filter: (n_name = 'SAUDI ARABIA'::bpchar)
                                                         Rows Removed by Filter: 24
                                                         Buffers: shared hit=1
                                                   ->  Bitmap Heap Scan on supplier  (cost=79.29..2350.29 rows=4000 width=34) (actual time=1.189..15.782 rows=4010 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1841
                                                         Buffers: shared hit=1841 read=13
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.901..0.901 rows=4010 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=13
                                 ->  Index Scan using orders_o_orderkey_o_orderdate_idx on orders  (cost=0.43..0.52 rows=1 width=4) (actual time=0.006..0.006 rows=0 loops=1523818)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6060412 read=43025 dirtied=253 written=17
                           ->  Index Scan using lineitem_l_orderkey_idx on lineitem l2  (cost=0.56..1.15 rows=15 width=8) (actual time=0.007..0.007 rows=1 loops=735195)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3546242 read=135718 dirtied=1 written=152
                     ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l3  (cost=0.56..0.91 rows=5 width=8) (actual time=0.004..0.004 rows=1 loops=708243)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3547536 read=2007 written=2
 Planning time: 9.985 ms
 Execution time: 52370.761 ms
(54 rows)

COMMIT;
COMMIT