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 = 'MOROCCO'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1950701.21..1950701.21 rows=1 width=26) (actual time=38583.401..38583.418 rows=100 loops=1)
   Buffers: shared hit=13272285 read=1253926
   ->  Sort  (cost=1950701.21..1950701.21 rows=1 width=26) (actual time=38583.399..38583.405 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13272285 read=1253926
         ->  HashAggregate  (cost=1950701.19..1950701.20 rows=1 width=26) (actual time=38581.371..38582.374 rows=3989 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13272277 read=1253926
               ->  Nested Loop Anti Join  (cost=2443.74..1950701.18 rows=1 width=26) (actual time=24.626..38534.854 rows=39780 loops=1)
                     Buffers: shared hit=13272277 read=1253926
                     ->  Nested Loop Semi Join  (cost=2443.17..1950699.88 rows=1 width=34) (actual time=22.744..36205.476 rows=704386 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=9745083 read=1251149
                           ->  Nested Loop  (cost=2442.61..1431894.86 rows=388308 width=38) (actual time=22.729..31810.328 rows=731312 loops=1)
                                 Buffers: shared hit=6247111 read=1086498
                                 ->  Hash Join  (cost=2442.17..1010453.46 rows=800607 width=34) (actual time=22.702..23798.983 rows=1514717 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=375882 read=890674
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..924948.92 rows=20015163 width=8) (actual time=0.089..17491.901 rows=37967116 loops=1)
                                             Buffers: shared hit=374025 read=890661
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=22.573..22.573 rows=3990 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 282kB
                                             Buffers: shared hit=1854 read=13
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.221..21.432 rows=3990 loops=1)
                                                   Buffers: shared hit=1854 read=13
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.017..0.023 rows=1 loops=1)
                                                         Filter: (n_name = 'MOROCCO'::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=1.196..20.500 rows=3990 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1853
                                                         Buffers: shared hit=1853 read=13
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.863..0.863 rows=3990 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=0.005..0.005 rows=0 loops=1514717)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=5871229 read=195824
                           ->  Index Scan using lineitem_l_orderkey_idx on lineitem l2  (cost=0.56..1.15 rows=15 width=8) (actual time=0.005..0.005 rows=1 loops=731312)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3497972 read=164651
                     ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l3  (cost=0.56..0.91 rows=5 width=8) (actual time=0.003..0.003 rows=1 loops=704386)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3527194 read=2777
 Planning time: 15.950 ms
 Execution time: 38583.747 ms
(54 rows)

COMMIT;
COMMIT