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=2877569.97..2877569.97 rows=1 width=26) (actual time=40743.404..40743.421 rows=100 loops=1)
   Buffers: shared hit=13861510 read=619556 written=858
   ->  Sort  (cost=2877569.97..2877569.97 rows=1 width=26) (actual time=40743.404..40743.411 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13861510 read=619556 written=858
         ->  HashAggregate  (cost=2877569.95..2877569.96 rows=1 width=26) (actual time=40741.198..40742.249 rows=4029 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13861502 read=619556 written=858
               ->  Nested Loop Anti Join  (cost=2406.88..2877569.94 rows=1 width=26) (actual time=42.170..40688.849 rows=39744 loops=1)
                     Buffers: shared hit=13861502 read=619556 written=858
                     ->  Nested Loop Semi Join  (cost=2406.31..2877568.16 rows=1 width=34) (actual time=41.636..37873.939 rows=712152 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10287954 read=617129 written=848
                           ->  Nested Loop  (cost=2405.75..2351156.45 rows=393906 width=38) (actual time=41.504..32821.354 rows=738716 loops=1)
                                 Buffers: shared hit=6751505 read=454410 written=106
                                 ->  Hash Join  (cost=2405.31..1925281.11 rows=808881 width=34) (actual time=41.471..25379.493 rows=1529029 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=648718 read=432727 written=19
                                       ->  Seq Scan on lineitem l1  (cost=0.00..1838829.99 rows=20255200 width=8) (actual time=0.014..18708.829 rows=37966199 loops=1)
                                             Filter: (l_receiptdate > l_commitdate)
                                             Rows Removed by Filter: 22079098
                                             Buffers: shared hit=646534 read=432726 written=19
                                       ->  Hash  (cost=2355.31..2355.31 rows=4000 width=30) (actual time=41.427..41.427 rows=4029 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 284kB
                                             Buffers: shared hit=2181 read=1
                                             ->  Nested Loop  (cost=43.00..2355.31 rows=4000 width=30) (actual time=0.298..40.248 rows=4029 loops=1)
                                                   Buffers: shared hit=2181 read=1
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.008..0.012 rows=1 loops=1)
                                                         Filter: (n_name = 'ROMANIA'::bpchar)
                                                         Rows Removed by Filter: 24
                                                         Buffers: shared hit=1
                                                   ->  Bitmap Heap Scan on supplier  (cost=43.00..2314.00 rows=4000 width=34) (actual time=0.283..39.534 rows=4029 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Rows Removed by Index Recheck: 95971
                                                         Heap Blocks: lossy=2179
                                                         Buffers: shared hit=2180 read=1
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_brin_idx  (cost=0.00..42.00 rows=4000 width=0) (actual time=0.263..0.263 rows=23040 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared hit=1 read=1
                                 ->  Index Scan using pk_orders on orders  (cost=0.43..0.52 rows=1 width=4) (actual time=0.004..0.004 rows=0 loops=1529029)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6102787 read=21683 written=87
                           ->  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=738716)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3536449 read=162719 written=742
                     ->  Index Scan using pk_lineitem on lineitem l3  (cost=0.56..1.15 rows=5 width=8) (actual time=0.003..0.003 rows=1 loops=712152)
                           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=3573548 read=2427 written=10
 Planning time: 9.026 ms
 Execution time: 40743.725 ms
(57 rows)

COMMIT;
COMMIT