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 = 'IRAN'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1951861.37..1951861.38 rows=1 width=26) (actual time=40062.719..40062.737 rows=100 loops=1)
   Buffers: shared hit=14178192 read=427039 dirtied=746 written=5266
   ->  Sort  (cost=1951861.37..1951861.38 rows=1 width=26) (actual time=40062.717..40062.724 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=14178192 read=427039 dirtied=746 written=5266
         ->  HashAggregate  (cost=1951861.35..1951861.36 rows=1 width=26) (actual time=40059.667..40061.525 rows=4023 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=14178184 read=427039 dirtied=746 written=5266
               ->  Nested Loop Anti Join  (cost=2443.74..1951861.35 rows=1 width=26) (actual time=38.112..39984.224 rows=39932 loops=1)
                     Buffers: shared hit=14178184 read=427039 dirtied=746 written=5266
                     ->  Nested Loop Semi Join  (cost=2443.17..1951860.04 rows=1 width=34) (actual time=34.059..37095.115 rows=709091 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10625164 read=426337 dirtied=746 written=5247
                           ->  Nested Loop  (cost=2442.61..1432155.02 rows=388982 width=38) (actual time=34.040..32609.905 rows=735737 loops=1)
                                 Buffers: shared hit=6982734 read=384150 dirtied=746 written=4477
                                 ->  Hash Join  (cost=2442.17..1010711.77 rows=800611 width=34) (actual time=33.903..24749.140 rows=1523003 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=945302 read=321255 dirtied=745 written=2968
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..925206.79 rows=20015270 width=8) (actual time=0.123..17461.029 rows=37928797 loops=1)
                                             Buffers: shared hit=944501 read=320185 dirtied=745 written=2968
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=33.723..33.723 rows=4023 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 284kB
                                             Buffers: shared hit=798 read=1070
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.247..31.795 rows=4023 loops=1)
                                                   Buffers: shared hit=798 read=1070
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.010..0.020 rows=1 loops=1)
                                                         Filter: (n_name = 'IRAN'::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=1.230..30.644 rows=4023 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1854
                                                         Buffers: shared hit=797 read=1070
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.918..0.918 rows=4023 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=0.004..0.005 rows=0 loops=1523003)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6037432 read=62895 dirtied=1 written=1509
                           ->  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=735737)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3642430 read=42187 written=770
                     ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l3  (cost=0.56..0.91 rows=5 width=8) (actual time=0.004..0.004 rows=1 loops=709091)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3553020 read=702 written=19
 Planning time: 9.755 ms
 Execution time: 40063.067 ms
(54 rows)

COMMIT;
COMMIT