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 STATES'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1953437.35..1953437.36 rows=1 width=26) (actual time=48570.849..48570.869 rows=100 loops=1)
   Buffers: shared hit=13944317 read=638481 written=3883
   ->  Sort  (cost=1953437.35..1953437.36 rows=1 width=26) (actual time=48570.844..48570.852 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13944317 read=638481 written=3883
         ->  HashAggregate  (cost=1953437.33..1953437.34 rows=1 width=26) (actual time=48567.300..48569.570 rows=4004 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13944309 read=638481 written=3883
               ->  Nested Loop Anti Join  (cost=2443.74..1953437.33 rows=1 width=26) (actual time=22.971..48497.905 rows=40059 loops=1)
                     Buffers: shared hit=13944309 read=638481 written=3883
                     ->  Nested Loop Semi Join  (cost=2443.17..1953436.02 rows=1 width=34) (actual time=22.107..45094.785 rows=707705 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10398899 read=636984 written=3875
                           ->  Nested Loop  (cost=2442.61..1433888.82 rows=388853 width=38) (actual time=22.072..39290.845 rows=734363 loops=1)
                                 Buffers: shared hit=6847905 read=510077 written=3164
                                 ->  Hash Join  (cost=2442.17..1011868.70 rows=801730 width=34) (actual time=21.867..29302.223 rows=1519827 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=815519 read=454885 written=2977
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..926247.58 rows=20043258 width=8) (actual time=0.115..20123.760 rows=37928740 loops=1)
                                             Buffers: shared hit=813656 read=454873 written=2974
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=21.652..21.652 rows=4004 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 283kB
                                             Buffers: shared hit=1860 read=12 written=3
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.808..19.707 rows=4004 loops=1)
                                                   Buffers: shared hit=1860 read=12 written=3
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.014..0.015 rows=1 loops=1)
                                                         Filter: (n_name = 'UNITED STATES'::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=1.785..18.248 rows=4004 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1858
                                                         Buffers: shared hit=1859 read=12 written=3
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=1.417..1.417 rows=4004 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared hit=1 read=12 written=3
                                 ->  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=1519827)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6032386 read=55192 written=187
                           ->  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=734363)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3550994 read=126907 written=711
                     ->  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=707705)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3545410 read=1497 written=8
 Planning time: 17.239 ms
 Execution time: 48571.379 ms
(54 rows)

COMMIT;
COMMIT