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 = 'ROMANIA'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1955463.57..1955463.58 rows=1 width=26) (actual time=47044.206..47044.223 rows=100 loops=1)
   Buffers: shared hit=14122894 read=537712 dirtied=372 written=2581
   ->  Sort  (cost=1955463.57..1955463.58 rows=1 width=26) (actual time=47044.203..47044.209 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=14122894 read=537712 dirtied=372 written=2581
         ->  HashAggregate  (cost=1955463.55..1955463.56 rows=1 width=26) (actual time=47040.998..47042.985 rows=4029 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=14122886 read=537712 dirtied=372 written=2581
               ->  Nested Loop Anti Join  (cost=2443.74..1955463.55 rows=1 width=26) (actual time=19.822..46977.646 rows=39732 loops=1)
                     Buffers: shared hit=14122886 read=537712 dirtied=372 written=2581
                     ->  Nested Loop Semi Join  (cost=2443.17..1955462.24 rows=1 width=34) (actual time=16.847..43669.353 rows=712125 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10554830 read=536830 dirtied=372 written=2578
                           ->  Nested Loop  (cost=2442.61..1433890.99 rows=390371 width=38) (actual time=16.822..37871.271 rows=738692 loops=1)
                                 Buffers: shared hit=6947032 read=445028 dirtied=371 written=2212
                                 ->  Hash Join  (cost=2442.17..1012019.06 rows=801413 width=34) (actual time=16.595..27979.195 rows=1528960 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=879329 read=388470 dirtied=251 written=1827
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..926430.84 rows=20035330 width=8) (actual time=0.104..19774.456 rows=37966905 loops=1)
                                             Buffers: shared hit=877484 read=388457 dirtied=251 written=1827
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=16.433..16.433 rows=4029 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 284kB
                                             Buffers: shared hit=1842 read=13
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.284..15.327 rows=4029 loops=1)
                                                   Buffers: shared hit=1842 read=13
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.013..0.018 rows=1 loops=1)
                                                         Filter: (n_name = 'ROMANIA'::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=1.265..14.502 rows=4029 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=0.966..0.966 rows=4029 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=1528960)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6067703 read=56558 dirtied=120 written=385
                           ->  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=738692)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3607798 read=91802 dirtied=1 written=366
                     ->  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=712125)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3568056 read=882 written=3
 Planning time: 11.054 ms
 Execution time: 47044.625 ms
(54 rows)

COMMIT;
COMMIT