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 = 'GERMANY'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1962126.51..1962126.51 rows=1 width=26) (actual time=46165.978..46165.997 rows=100 loops=1)
   Buffers: shared hit=13968244 read=757024 dirtied=601 written=7644
   ->  Sort  (cost=1962126.51..1962126.51 rows=1 width=26) (actual time=46165.974..46165.981 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13968244 read=757024 dirtied=601 written=7644
         ->  HashAggregate  (cost=1962126.49..1962126.50 rows=1 width=26) (actual time=46162.705..46164.792 rows=4049 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13968236 read=757024 dirtied=601 written=7644
               ->  Nested Loop Anti Join  (cost=2443.74..1962126.48 rows=1 width=26) (actual time=16.196..46081.650 rows=40136 loops=1)
                     Buffers: shared hit=13968236 read=757024 dirtied=601 written=7644
                     ->  Nested Loop Semi Join  (cost=2443.17..1962125.18 rows=1 width=34) (actual time=15.505..43475.919 rows=714539 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10389176 read=755001 dirtied=601 written=7620
                           ->  Nested Loop  (cost=2442.61..1437617.60 rows=392545 width=38) (actual time=15.480..38109.212 rows=741508 loops=1)
                                 Buffers: shared hit=6840624 read=590409 dirtied=601 written=5127
                                 ->  Hash Join  (cost=2442.17..1014462.85 rows=803813 width=34) (actual time=15.440..29508.333 rows=1534290 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=757239 read=528174 dirtied=601 written=5046
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..928625.66 rows=20095320 width=8) (actual time=0.093..20669.265 rows=37929015 loops=1)
                                             Buffers: shared hit=755404 read=528161 dirtied=601 written=5046
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=15.258..15.258 rows=4049 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 286kB
                                             Buffers: shared hit=1832 read=13
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.331..14.122 rows=4049 loops=1)
                                                   Buffers: shared hit=1832 read=13
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.010..0.018 rows=1 loops=1)
                                                         Filter: (n_name = 'GERMANY'::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=1.315..13.335 rows=4049 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1831
                                                         Buffers: shared hit=1831 read=13
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=1.034..1.034 rows=4049 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=1534290)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6083385 read=62235 written=81
                           ->  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=741508)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3548552 read=164592 written=2493
                     ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l3  (cost=0.56..0.91 rows=5 width=8) (actual time=0.003..0.003 rows=1 loops=714539)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3579060 read=2023 written=24
 Planning time: 10.301 ms
 Execution time: 46166.394 ms
(54 rows)

COMMIT;
COMMIT