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=10244181.43..10244184.18 rows=100 width=39) (actual time=102704.330..102704.578 rows=75 loops=1)
   Buffers: shared hit=1625374 read=817809 written=42
   ->  GroupAggregate  (cost=10244181.43..11077220.61 rows=30292334 width=39) (actual time=102704.326..102704.562 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1625374 read=817809 written=42
         ->  Sort  (cost=10244181.43..10319912.26 rows=30292334 width=39) (actual time=102704.308..102704.339 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=1625374 read=817809 written=42
               ->  Hash Join  (cost=2909557.03..5651681.44 rows=30292334 width=39) (actual time=78946.037..102703.151 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1625362 read=817809 written=42
                     ->  Seq Scan on lineitem  (cost=0.00..1681892.69 rows=60584669 width=8) (actual time=0.026..12015.067 rows=60044176 loops=1)
                           Buffers: shared hit=601701 read=474345 written=5
                     ->  Hash  (cost=2814869.78..2814869.78 rows=7574980 width=39) (actual time=78706.674..78706.674 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=1023661 read=343464 written=37
                           ->  Hash Join  (cost=2196401.45..2814869.78 rows=7574980 width=39) (actual time=69463.275..78702.107 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=1023661 read=343464 written=37
                                 ->  Hash Join  (cost=2127373.45..2632217.08 rows=7574980 width=20) (actual time=68330.023..77561.778 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=988384 read=343463 written=37
                                       ->  Seq Scan on orders  (cost=0.00..407300.59 rows=15149959 width=16) (actual time=0.011..3399.803 rows=15015000 loops=1)
                                             Buffers: shared hit=230825 read=24976 written=31
                                       ->  Hash  (cost=2076460.09..2076460.09 rows=4073069 width=4) (actual time=68176.587..68176.587 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=757559 read=318487 written=6
                                             ->  HashAggregate  (cost=1984816.04..2035729.40 rows=4073069 width=8) (actual time=57061.662..68173.042 rows=75 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 15014925
                                                   Buffers: shared hit=757559 read=318487 written=6
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1681892.69 rows=60584669 width=8) (actual time=0.017..14293.168 rows=60044176 loops=1)
                                                         Buffers: shared hit=757559 read=318487 written=6
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1116.406..1116.406 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35277 read=1
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.023..617.337 rows=1500000 loops=1)
                                             Buffers: shared hit=35277 read=1
 Planning time: 4.914 ms
 Execution time: 103033.852 ms
(42 rows)

COMMIT;
COMMIT