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 = 'EGYPT'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1970318.32..1970318.32 rows=1 width=26) (actual time=48287.351..48287.379 rows=100 loops=1)
   Buffers: shared hit=13728772 read=801137 dirtied=215 written=7135
   ->  Sort  (cost=1970318.32..1970318.32 rows=1 width=26) (actual time=48287.348..48287.360 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13728772 read=801137 dirtied=215 written=7135
         ->  HashAggregate  (cost=1970318.30..1970318.31 rows=1 width=26) (actual time=48283.788..48285.398 rows=3981 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13728764 read=801137 dirtied=215 written=7135
               ->  Nested Loop Anti Join  (cost=2443.74..1970318.29 rows=1 width=26) (actual time=18.415..48219.616 rows=39457 loops=1)
                     Buffers: shared hit=13728764 read=801137 dirtied=215 written=7135
                     ->  Nested Loop Semi Join  (cost=2443.17..1970316.98 rows=1 width=34) (actual time=17.201..44860.462 rows=703569 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10204749 read=799225 dirtied=215 written=7118
                           ->  Nested Loop  (cost=2442.61..1446228.69 rows=392183 width=38) (actual time=17.179..39238.660 rows=730261 loops=1)
                                 Buffers: shared hit=6661421 read=685140 dirtied=215 written=6222
                                 ->  Hash Join  (cost=2442.17..1020514.71 rows=808598 width=34) (actual time=17.156..29757.344 rows=1512427 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=623360 read=665296 written=6131
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..934181.08 rows=20214944 width=8) (actual time=0.103..21050.662 rows=37965800 loops=1)
                                             Buffers: shared hit=621498 read=665283 written=6131
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=16.955..16.955 rows=3981 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 281kB
                                             Buffers: shared hit=1859 read=13
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.303..15.660 rows=3981 loops=1)
                                                   Buffers: shared hit=1859 read=13
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.009..0.019 rows=1 loops=1)
                                                         Filter: (n_name = 'EGYPT'::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=1.289..14.826 rows=3981 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1858
                                                         Buffers: shared hit=1858 read=13
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.983..0.983 rows=3981 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..0.006 rows=0 loops=1512427)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6038061 read=19844 dirtied=215 written=91
                           ->  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=730261)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3543328 read=114085 written=896
                     ->  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=703569)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3524015 read=1912 written=17
 Planning time: 11.023 ms
 Execution time: 48287.863 ms
(54 rows)

COMMIT;
COMMIT