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 = 'EGYPT'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1959797.44..1959797.45 rows=1 width=26) (actual time=43796.669..43796.688 rows=100 loops=1)
   Buffers: shared hit=13729118 read=778231 written=2380
   ->  Sort  (cost=1959797.44..1959797.45 rows=1 width=26) (actual time=43796.666..43796.670 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13729118 read=778231 written=2380
         ->  HashAggregate  (cost=1959797.42..1959797.43 rows=1 width=26) (actual time=43794.427..43795.553 rows=3981 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13729110 read=778231 written=2380
               ->  Nested Loop Anti Join  (cost=2443.74..1959797.42 rows=1 width=26) (actual time=16.385..43721.704 rows=39436 loops=1)
                     Buffers: shared hit=13729110 read=778231 written=2380
                     ->  Nested Loop Semi Join  (cost=2443.17..1959796.11 rows=1 width=34) (actual time=15.271..40837.999 rows=702892 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10208489 read=776299 written=2375
                           ->  Nested Loop  (cost=2442.61..1435906.36 rows=392092 width=38) (actual time=15.248..35661.668 rows=729585 loops=1)
                                 Buffers: shared hit=6691651 read=639617 written=1908
                                 ->  Hash Join  (cost=2442.17..1013292.66 rows=802885 width=34) (actual time=15.229..27225.378 rows=1511026 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=710390 read=568515 written=1432
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..927551.73 rows=20072124 width=8) (actual time=0.096..18702.997 rows=37928885 loops=1)
                                             Buffers: shared hit=708528 read=568502 written=1432
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=15.042..15.042 rows=3981 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 281kB
                                             Buffers: shared hit=1859 read=13
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.225..13.925 rows=3981 loops=1)
                                                   Buffers: shared hit=1859 read=13
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.010..0.021 rows=1 loops=1)
                                                         Filter: (n_name = 'EGYPT'::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=1.209..13.184 rows=3981 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1858
                                                         Buffers: shared hit=1858 read=13
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.919..0.919 rows=3981 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=13
                                 ->  Index Scan using pk_orders on orders  (cost=0.43..0.52 rows=1 width=4) (actual time=0.005..0.005 rows=0 loops=1511026)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=5981261 read=71102 written=476
                           ->  Index Scan using pk_lineitem on lineitem l2  (cost=0.56..1.15 rows=15 width=8) (actual time=0.006..0.006 rows=1 loops=729585)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3516838 read=136682 written=467
                     ->  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=702892)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3520621 read=1932 written=5
 Planning time: 10.090 ms
 Execution time: 43797.091 ms
(54 rows)

COMMIT;
COMMIT