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 = 'IRAQ'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=4861613.79..4861613.80 rows=1 width=26) (actual time=117449.647..117449.666 rows=100 loops=1)
   Buffers: shared hit=10363287 read=1436075 written=47, temp read=161724 written=161718
   ->  Sort  (cost=4861613.79..4861613.80 rows=1 width=26) (actual time=117449.643..117449.652 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=10363287 read=1436075 written=47, temp read=161724 written=161718
         ->  HashAggregate  (cost=4861613.77..4861613.78 rows=1 width=26) (actual time=117445.040..117446.920 rows=4095 loops=1)
               Buffers: shared hit=10363279 read=1436075 written=47, temp read=161724 written=161718
               ->  Nested Loop Anti Join  (cost=2686282.87..4861613.77 rows=1 width=26) (actual time=37665.701..117317.594 rows=40936 loops=1)
                     Buffers: shared hit=10363279 read=1436075 written=47, temp read=161724 written=161718
                     ->  Nested Loop  (cost=2686282.87..4861598.58 rows=1 width=34) (actual time=37659.978..104185.983 rows=723982 loops=1)
                           Join Filter: (l1.l_orderkey = orders.o_orderkey)
                           Buffers: shared hit=7290063 read=872794 written=28, temp read=161724 written=161718
                           ->  Hash Semi Join  (cost=2686282.87..4861596.58 rows=1 width=38) (actual time=37659.906..91210.522 rows=1498601 loops=1)
                                 Hash Cond: (l1.l_orderkey = l2.l_orderkey)
                                 Join Filter: (l2.l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Join Filter: 388776
                                 Buffers: shared hit=1392265 read=768113, temp read=161724 written=161718
                                 ->  Hash Join  (cost=2441.58..1925317.31 rows=809328 width=34) (actual time=17.729..37677.600 rows=1554216 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=593952 read=487164
                                       ->  Seq Scan on lineitem l1  (cost=0.00..1838826.05 rows=20255041 width=8) (actual time=0.037..25062.489 rows=37928434 loops=1)
                                             Filter: (l_receiptdate > l_commitdate)
                                             Rows Removed by Filter: 22057104
                                             Buffers: shared hit=592112 read=487150
                                       ->  Hash  (cost=2391.58..2391.58 rows=4000 width=30) (actual time=17.635..17.635 rows=4095 loops=1)
                                             Buckets: 1024  Batches: 1  Memory Usage: 256kB
                                             Buffers: shared hit=1837 read=14
                                             ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=30) (actual time=1.312..16.264 rows=4095 loops=1)
                                                   Buffers: shared hit=1837 read=14
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.008..0.015 rows=1 loops=1)
                                                         Filter: (n_name = 'IRAQ'::bpchar)
                                                         Rows Removed by Filter: 24
                                                         Buffers: shared hit=1
                                                   ->  Bitmap Heap Scan on supplier  (cost=79.26..2350.26 rows=4000 width=34) (actual time=1.300..15.350 rows=4095 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Buffers: shared hit=1836 read=14
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=0.997..0.997 rows=4095 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=14
                                 ->  Hash  (cost=1686913.24..1686913.24 rows=60765124 width=8) (actual time=37456.587..37456.587 rows=59985538 loops=1)
                                       Buckets: 4194304  Batches: 4  Memory Usage: 585996kB
                                       Buffers: shared hit=798313 read=280949, temp written=153752
                                       ->  Seq Scan on lineitem l2  (cost=0.00..1686913.24 rows=60765124 width=8) (actual time=0.032..18696.744 rows=59985538 loops=1)
                                             Buffers: shared hit=798313 read=280949
                           ->  Index Scan using pk_orders on orders  (cost=0.00..1.98 rows=1 width=4) (actual time=0.008..0.008 rows=0 loops=1498601)
                                 Index Cond: (o_orderkey = l2.l_orderkey)
                                 Filter: (o_orderstatus = 'F'::bpchar)
                                 Rows Removed by Filter: 1
                                 Buffers: shared hit=5897798 read=104681 written=28
                     ->  Index Scan using lineitem_l_orderkey_idx on lineitem l3  (cost=0.00..7.57 rows=5 width=8) (actual time=0.017..0.017 rows=1 loops=723982)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: ((l_receiptdate > l_commitdate) AND (l_suppkey <> l1.l_suppkey))
                           Rows Removed by Filter: 1
                           Buffers: shared hit=3073216 read=563281 written=19
 Total runtime: 117450.663 ms
(56 rows)

COMMIT;
COMMIT