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=1962460.70..1962460.70 rows=1 width=26) (actual time=53991.542..53991.564 rows=100 loops=1)
   Buffers: shared hit=14043119 read=593812 dirtied=296 written=5515
   ->  Sort  (cost=1962460.70..1962460.70 rows=1 width=26) (actual time=53991.538..53991.546 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=14043119 read=593812 dirtied=296 written=5515
         ->  HashAggregate  (cost=1962460.68..1962460.69 rows=1 width=26) (actual time=53988.327..53990.272 rows=4023 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=14043111 read=593812 dirtied=296 written=5515
               ->  Nested Loop Anti Join  (cost=2443.74..1962460.67 rows=1 width=26) (actual time=32.141..53875.274 rows=39976 loops=1)
                     Buffers: shared hit=14043111 read=593812 dirtied=296 written=5515
                     ->  Nested Loop Semi Join  (cost=2443.17..1962459.36 rows=1 width=34) (actual time=25.275..50272.046 rows=709583 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10488420 read=592323 dirtied=296 written=5503
                           ->  Nested Loop  (cost=2442.61..1440487.80 rows=390631 width=38) (actual time=25.239..44214.494 rows=736253 loops=1)
                                 Buffers: shared hit=6903830 read=489716 dirtied=296 written=4469
                                 ->  Hash Join  (cost=2442.17..1016485.17 rows=805397 width=34) (actual time=25.064..34082.920 rows=1524317 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=848566 read=439428 dirtied=296 written=4221
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..930483.65 rows=20134919 width=8) (actual time=0.105..21218.327 rows=37966100 loops=1)
                                             Buffers: shared hit=846707 read=439416 dirtied=296 written=4221
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=24.886..24.886 rows=4023 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 284kB
                                             Buffers: shared hit=1856 read=12
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.729..22.759 rows=4023 loops=1)
                                                   Buffers: shared hit=1856 read=12
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.011..0.019 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=1.711..21.106 rows=4023 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1854
                                                         Buffers: shared hit=1855 read=12
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=1.339..1.339 rows=4023 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared hit=1 read=12
                                 ->  Index Scan using orders_o_orderkey_o_orderdate_idx on orders  (cost=0.43..0.52 rows=1 width=4) (actual time=0.006..0.006 rows=0 loops=1524317)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6055264 read=50288 written=248
                           ->  Index Scan using lineitem_l_orderkey_idx on lineitem l2  (cost=0.56..1.15 rows=15 width=8) (actual time=0.007..0.007 rows=1 loops=736253)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3584590 read=102607 written=1034
                     ->  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=709583)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3554691 read=1489 written=12
 Planning time: 15.776 ms
 Execution time: 53992.162 ms
(54 rows)

COMMIT;
COMMIT