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 = 'UNITED KINGDOM'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                  QUERY PLAN                                                                                                  
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2871827.54..2871827.55 rows=1 width=26) (actual time=40735.513..40735.530 rows=100 loops=1)
   Buffers: shared hit=13769105 read=504661 written=2075
   ->  Sort  (cost=2871827.54..2871827.55 rows=1 width=26) (actual time=40735.512..40735.519 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13769105 read=504661 written=2075
         ->  HashAggregate  (cost=2871827.52..2871827.53 rows=1 width=26) (actual time=40733.012..40734.288 rows=3973 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13769097 read=504661 written=2075
               ->  Nested Loop Anti Join  (cost=2406.88..2871827.52 rows=1 width=26) (actual time=46.147..40677.536 rows=39560 loops=1)
                     Buffers: shared hit=13769097 read=504661 written=2075
                     ->  Nested Loop Semi Join  (cost=2406.31..2871825.74 rows=1 width=34) (actual time=45.250..37833.525 rows=700640 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10252362 read=502897 written=2053
                           ->  Nested Loop  (cost=2405.75..2346480.36 rows=393124 width=38) (actual time=45.181..33017.677 rows=726904 loops=1)
                                 Buffers: shared hit=6726993 read=387970 written=962
                                 ->  Hash Join  (cost=2405.31..1921463.00 rows=807275 width=34) (actual time=45.059..25579.457 rows=1506868 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=739123 read=340179 written=73
                                       ->  Seq Scan on lineitem l1  (cost=0.00..1835178.76 rows=20214980 width=8) (actual time=0.014..18389.480 rows=37965800 loops=1)
                                             Filter: (l_receiptdate > l_commitdate)
                                             Rows Removed by Filter: 22079072
                                             Buffers: shared hit=736938 read=340179 written=73
                                       ->  Hash  (cost=2355.31..2355.31 rows=4000 width=30) (actual time=45.012..45.012 rows=3973 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 281kB
                                             Buffers: shared hit=2182
                                             ->  Nested Loop  (cost=43.00..2355.31 rows=4000 width=30) (actual time=0.326..43.785 rows=3973 loops=1)
                                                   Buffers: shared hit=2182
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.008..0.010 rows=1 loops=1)
                                                         Filter: (n_name = 'UNITED KINGDOM'::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=0.311..43.163 rows=3973 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Rows Removed by Index Recheck: 96027
                                                         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=0.296..0.296 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=1506868)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=5987870 read=47791 written=889
                           ->  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=726904)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3525369 read=114927 written=1091
                     ->  Index Scan using pk_lineitem on lineitem l3  (cost=0.56..1.15 rows=5 width=8) (actual time=0.004..0.004 rows=1 loops=700640)
                           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=3516735 read=1764 written=22
 Planning time: 9.537 ms
 Execution time: 40735.855 ms
(57 rows)

COMMIT;
COMMIT