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 = 'MOZAMBIQUE'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1953763.20..1953763.20 rows=1 width=26) (actual time=38463.139..38463.149 rows=100 loops=1)
   Buffers: shared hit=13066677 read=1251685
   ->  Sort  (cost=1953763.20..1953763.20 rows=1 width=26) (actual time=38463.137..38463.137 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13066677 read=1251685
         ->  HashAggregate  (cost=1953763.18..1953763.19 rows=1 width=26) (actual time=38461.141..38462.125 rows=3924 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13066669 read=1251685
               ->  Nested Loop Anti Join  (cost=2443.74..1953763.17 rows=1 width=26) (actual time=22.025..38414.628 rows=38578 loops=1)
                     Buffers: shared hit=13066669 read=1251685
                     ->  Nested Loop Semi Join  (cost=2443.17..1953761.86 rows=1 width=34) (actual time=21.994..36119.781 rows=693445 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=9594119 read=1248878
                           ->  Nested Loop  (cost=2442.61..1431564.19 rows=390847 width=38) (actual time=21.916..31806.949 rows=719610 loops=1)
                                 Buffers: shared hit=6154622 read=1084307
                                 ->  Hash Join  (cost=2442.17..1010457.40 rows=799971 width=34) (actual time=21.892..24009.488 rows=1491025 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=377425 read=889130
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..924959.52 rows=20015083 width=8) (actual time=0.081..17808.574 rows=37967116 loops=1)
                                             Buffers: shared hit=375568 read=889118
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=21.733..21.733 rows=3924 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 278kB
                                             Buffers: shared hit=1854 read=12
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.194..20.610 rows=3924 loops=1)
                                                   Buffers: shared hit=1854 read=12
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.009..0.014 rows=1 loops=1)
                                                         Filter: (n_name = 'MOZAMBIQUE'::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=1.176..19.679 rows=3924 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1853
                                                         Buffers: shared hit=1853 read=12
                                                         ->  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=3924 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=12
                                 ->  Index Scan using orders_o_orderkey_o_orderdate_idx on orders  (cost=0.43..0.52 rows=1 width=4) (actual time=0.005..0.005 rows=0 loops=1491025)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=5777197 read=195177
                           ->  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=719610)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3439497 read=164571
                     ->  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=693445)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3472550 read=2807
 Planning time: 18.004 ms
 Execution time: 38463.488 ms
(54 rows)

COMMIT;
COMMIT