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 = 'JORDAN'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1956739.19..1956739.20 rows=1 width=26) (actual time=49643.859..49643.880 rows=100 loops=1)
   Buffers: shared hit=13572240 read=779383 written=8213
   ->  Sort  (cost=1956739.19..1956739.20 rows=1 width=26) (actual time=49643.855..49643.862 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13572240 read=779383 written=8213
         ->  HashAggregate  (cost=1956739.17..1956739.18 rows=1 width=26) (actual time=49640.609..49642.639 rows=3933 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13572232 read=779383 written=8213
               ->  Nested Loop Anti Join  (cost=2443.74..1956739.17 rows=1 width=26) (actual time=17.226..49537.924 rows=39122 loops=1)
                     Buffers: shared hit=13572232 read=779383 written=8213
                     ->  Nested Loop Semi Join  (cost=2443.17..1956737.86 rows=1 width=34) (actual time=16.975..46503.595 rows=694975 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10091127 read=777495 written=8195
                           ->  Nested Loop  (cost=2442.61..1434975.83 rows=390506 width=38) (actual time=16.876..41005.452 rows=721462 loops=1)
                                 Buffers: shared hit=6613678 read=642207 written=6986
                                 ->  Hash Join  (cost=2442.17..1012685.17 rows=802196 width=34) (actual time=16.822..31385.973 rows=1493510 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=740427 read=533236 written=6211
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..927014.24 rows=20055296 width=8) (actual time=0.096..20224.860 rows=37966418 loops=1)
                                             Buffers: shared hit=738566 read=533223 written=6211
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=16.658..16.658 rows=3933 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 278kB
                                             Buffers: shared hit=1858 read=13
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.271..15.477 rows=3933 loops=1)
                                                   Buffers: shared hit=1858 read=13
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.011..0.021 rows=1 loops=1)
                                                         Filter: (n_name = 'JORDAN'::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=1.253..14.668 rows=3933 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1857
                                                         Buffers: shared hit=1857 read=13
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.949..0.949 rows=3933 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=1493510)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=5873251 read=108971 written=775
                           ->  Index Scan using pk_lineitem on lineitem l2  (cost=0.56..1.15 rows=15 width=8) (actual time=0.007..0.007 rows=1 loops=721462)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3477449 read=135288 written=1209
                     ->  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=694975)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3481105 read=1888 written=18
 Planning time: 11.102 ms
 Execution time: 49644.363 ms
(54 rows)

COMMIT;
COMMIT