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 = 'SAUDI ARABIA'
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=39328.801..39328.818 rows=100 loops=1)
   Buffers: shared hit=13862154 read=546123 written=19
   ->  Sort  (cost=2877569.97..2877569.97 rows=1 width=26) (actual time=39328.799..39328.806 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13862154 read=546123 written=19
         ->  HashAggregate  (cost=2877569.95..2877569.96 rows=1 width=26) (actual time=39326.458..39327.638 rows=4009 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13862146 read=546123 written=19
               ->  Nested Loop Anti Join  (cost=2406.88..2877569.94 rows=1 width=26) (actual time=42.228..39272.392 rows=39455 loops=1)
                     Buffers: shared hit=13862146 read=546123 written=19
                     ->  Nested Loop Semi Join  (cost=2406.31..2877568.16 rows=1 width=34) (actual time=41.535..36488.370 rows=707463 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10311421 read=544600 written=18
                           ->  Nested Loop  (cost=2405.75..2351156.45 rows=393906 width=38) (actual time=41.481..32488.698 rows=734429 loops=1)
                                 Buffers: shared hit=6656808 read=521591 written=3
                                 ->  Hash Join  (cost=2405.31..1925281.11 rows=808881 width=34) (actual time=41.364..25296.896 rows=1522218 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=564478 read=516967 written=1
                                       ->  Seq Scan on lineitem l1  (cost=0.00..1838829.99 rows=20255200 width=8) (actual time=0.017..18708.376 rows=37928434 loops=1)
                                             Filter: (l_receiptdate > l_commitdate)
                                             Rows Removed by Filter: 22057104
                                             Buffers: shared hit=562293 read=516967 written=1
                                       ->  Hash  (cost=2355.31..2355.31 rows=4000 width=30) (actual time=41.295..41.295 rows=4010 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 283kB
                                             Buffers: shared hit=2182
                                             ->  Nested Loop  (cost=43.00..2355.31 rows=4000 width=30) (actual time=0.305..40.197 rows=4010 loops=1)
                                                   Buffers: shared hit=2182
                                                   ->  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 = 'SAUDI ARABIA'::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=0.289..39.501 rows=4010 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Rows Removed by Index Recheck: 95990
                                                         Heap Blocks: lossy=2179
                                                         Buffers: shared hit=2181
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_brin_idx  (cost=0.00..42.00 rows=4000 width=0) (actual time=0.252..0.252 rows=23040 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared hit=2
                                 ->  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=1522218)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6092330 read=4624 written=2
                           ->  Index Scan using pk_lineitem on lineitem l2  (cost=0.56..1.15 rows=15 width=8) (actual time=0.005..0.005 rows=1 loops=734429)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3654613 read=23009 written=15
                     ->  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=707463)
                           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=3550725 read=1523 written=1
 Planning time: 8.679 ms
 Execution time: 39329.127 ms
(57 rows)

COMMIT;
COMMIT