BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	c_name,
	c_custkey,
	o_orderkey,
	o_orderdate,
	o_totalprice,
	sum(l_quantity)
from
	customer,
	orders,
	lineitem
where
	o_orderkey in (
		select
			l_orderkey
		from
			lineitem
		group by
			l_orderkey having
				sum(l_quantity) > 315
	)
	and c_custkey = o_custkey
	and o_orderkey = l_orderkey
group by
	c_name,
	c_custkey,
	o_orderkey,
	o_orderdate,
	o_totalprice
order by
	o_totalprice desc,
	o_orderdate
LIMIT 100;
                                                                                   QUERY PLAN                                                                                   
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=10373915.91..10373918.66 rows=100 width=39) (actual time=236750.231..236750.486 rows=75 loops=1)
   Buffers: shared hit=1044003 read=1389672 dirtied=184 written=171
   ->  GroupAggregate  (cost=10373915.91..11203654.54 rows=30172314 width=39) (actual time=236750.226..236750.475 rows=75 loops=1)
         Buffers: shared hit=1044003 read=1389672 dirtied=184 written=171
         ->  Sort  (cost=10373915.91..10449346.69 rows=30172314 width=39) (actual time=236750.210..236750.253 rows=525 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 66kB
               Buffers: shared hit=1044003 read=1389672 dirtied=184 written=171
               ->  Hash Join  (cost=3069198.11..5800473.42 rows=30172314 width=39) (actual time=153971.931..236746.826 rows=525 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1043989 read=1389672 dirtied=184 written=171
                     ->  Seq Scan on lineitem  (cost=0.00..1675244.29 rows=60344629 width=8) (actual time=0.027..67559.198 rows=60045826 loops=1)
                           Buffers: shared hit=387096 read=684702 dirtied=184 written=171
                     ->  Hash  (cost=2974886.21..2974886.21 rows=7544952 width=39) (actual time=153161.152..153161.152 rows=75 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=656893 read=704970
                           ->  Hash Join  (cost=2188859.13..2974886.21 rows=7544952 width=39) (actual time=139431.218..153160.618 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=656893 read=704970
                                 ->  Hash Join  (cost=2119831.13..2754959.17 rows=7544952 width=20) (actual time=137549.523..151276.624 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=622661 read=703924
                                       ->  Seq Scan on orders  (cost=0.00..405686.04 rows=15089904 width=16) (actual time=0.037..8277.910 rows=15015000 loops=1)
                                             Buffers: shared hit=254787
                                       ->  Hash  (cost=2068808.39..2068808.39 rows=4081820 width=4) (actual time=137249.319..137249.319 rows=75 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=367874 read=703924
                                             ->  HashAggregate  (cost=1976967.44..2027990.19 rows=4081820 width=8) (actual time=128647.814..137248.647 rows=75 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 15014925
                                                   Buffers: shared hit=367874 read=703924
                                                   ->  Seq Scan on lineitem  (cost=0.00..1675244.29 rows=60344629 width=8) (actual time=0.014..73673.075 rows=60045826 loops=1)
                                                         Buffers: shared hit=367874 read=703924
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1879.378..1879.378 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=34232 read=1046
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.020..1115.447 rows=1500000 loops=1)
                                             Buffers: shared hit=34232 read=1046
 Total runtime: 236964.875 ms
(39 rows)

COMMIT;
COMMIT