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=4813683.81..4813683.81 rows=1 width=26) (actual time=161997.587..161997.612 rows=100 loops=1)
   Buffers: shared hit=10153353 read=1468224 dirtied=285 written=20201, temp read=161745 written=161739
   ->  Sort  (cost=4813683.81..4813683.81 rows=1 width=26) (actual time=161997.583..161997.591 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=10153353 read=1468224 dirtied=285 written=20201, temp read=161745 written=161739
         ->  HashAggregate  (cost=4813683.79..4813683.80 rows=1 width=26) (actual time=161989.755..161992.673 rows=4029 loops=1)
               Buffers: shared hit=10153345 read=1468224 dirtied=285 written=20201, temp read=161745 written=161739
               ->  Nested Loop Anti Join  (cost=2659796.09..4813683.78 rows=1 width=26) (actual time=52154.097..161821.945 rows=39737 loops=1)
                     Buffers: shared hit=10153345 read=1468224 dirtied=285 written=20201, temp read=161745 written=161739
                     ->  Nested Loop  (cost=2659796.09..4813668.83 rows=1 width=34) (actual time=52138.675..140650.961 rows=712089 loops=1)
                           Join Filter: (l1.l_orderkey = orders.o_orderkey)
                           Buffers: shared hit=7243372 read=802515 dirtied=285 written=709, temp read=161745 written=161739
                           ->  Hash Semi Join  (cost=2659796.09..4813666.87 rows=1 width=38) (actual time=52138.458..121454.109 rows=1474674 loops=1)
                                 Hash Cond: (l1.l_orderkey = l2.l_orderkey)
                                 Join Filter: (l2.l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Join Filter: 381539
                                 Buffers: shared hit=1361974 read=777101 dirtied=257 written=690, temp read=161745 written=161739
                                 ->  Hash Join  (cost=2441.58..1906347.74 rows=802207 width=34) (actual time=31.953..51818.747 rows=1528930 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=568766 read=501701 written=2
                                       ->  Seq Scan on lineitem l1  (cost=0.00..1820677.18 rows=20055178 width=8) (actual time=0.038..33819.180 rows=37966418 loops=1)
                                             Filter: (l_receiptdate > l_commitdate)
                                             Rows Removed by Filter: 22078961
                                             Buffers: shared hit=566921 read=501687 written=2
                                       ->  Hash  (cost=2391.58..2391.58 rows=4000 width=30) (actual time=31.829..31.829 rows=4029 loops=1)
                                             Buckets: 1024  Batches: 1  Memory Usage: 252kB
                                             Buffers: shared hit=1842 read=14
                                             ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=30) (actual time=1.791..29.643 rows=4029 loops=1)
                                                   Buffers: shared hit=1842 read=14
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.012..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=79.26..2350.26 rows=4000 width=34) (actual time=1.773..28.104 rows=4029 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Buffers: shared hit=1841 read=14
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=1.391..1.391 rows=4029 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=14
                                 ->  Hash  (cost=1670263.34..1670263.34 rows=60165534 width=8) (actual time=52071.158..52071.158 rows=60045379 loops=1)
                                       Buckets: 4194304  Batches: 4  Memory Usage: 586617kB
                                       Buffers: shared hit=793208 read=275400 dirtied=257 written=688, temp written=153903
                                       ->  Seq Scan on lineitem l2  (cost=0.00..1670263.34 rows=60165534 width=8) (actual time=0.015..27040.815 rows=60045379 loops=1)
                                             Buffers: shared hit=793208 read=275400 dirtied=257 written=688
                           ->  Index Scan using orders_o_orderkey_o_orderdate_idx on orders  (cost=0.00..1.95 rows=1 width=4) (actual time=0.012..0.012 rows=0 loops=1474674)
                                 Index Cond: (o_orderkey = l2.l_orderkey)
                                 Filter: (o_orderstatus = 'F'::bpchar)
                                 Rows Removed by Filter: 1
                                 Buffers: shared hit=5881398 read=25414 dirtied=28 written=19
                     ->  Index Scan using pk_lineitem on lineitem l3  (cost=0.00..7.45 rows=5 width=8) (actual time=0.029..0.029 rows=1 loops=712089)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: ((l_receiptdate > l_commitdate) AND (l_suppkey <> l1.l_suppkey))
                           Rows Removed by Filter: 1
                           Buffers: shared hit=2909973 read=665709 written=19492
 Total runtime: 161999.370 ms
(56 rows)

COMMIT;
COMMIT