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=10225342.04..10225344.79 rows=100 width=39) (actual time=89832.606..89832.855 rows=75 loops=1)
   Buffers: shared hit=1432368 read=1006053 dirtied=653 written=914
   ->  GroupAggregate  (cost=10225342.04..11056729.60 rows=30232275 width=39) (actual time=89832.603..89832.841 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1432368 read=1006053 dirtied=653 written=914
         ->  Sort  (cost=10225342.04..10300922.72 rows=30232275 width=39) (actual time=89832.591..89832.629 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=1432368 read=1006053 dirtied=653 written=914
               ->  Hash Join  (cost=2905686.27..5642379.42 rows=30232275 width=39) (actual time=67521.768..89831.617 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1432356 read=1006053 dirtied=653 written=914
                     ->  Seq Scan on lineitem  (cost=0.00..1678563.50 rows=60464550 width=8) (actual time=0.031..13279.443 rows=60044664 loops=1)
                           Buffers: shared hit=665314 read=408604 written=10
                     ->  Hash  (cost=2811186.32..2811186.32 rows=7559996 width=39) (actual time=67376.911..67376.911 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=767042 read=597449 dirtied=653 written=904
                           ->  Hash Join  (cost=2193552.11..2811186.32 rows=7559996 width=39) (actual time=59417.723..67372.684 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=767042 read=597449 dirtied=653 written=904
                                 ->  Hash Join  (cost=2124524.11..2628758.38 rows=7559996 width=20) (actual time=58032.804..65981.017 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=767040 read=562173 dirtied=653 written=863
                                       ->  Seq Scan on orders  (cost=0.00..406494.91 rows=15119991 width=16) (actual time=0.015..4678.782 rows=15015000 loops=1)
                                             Buffers: shared hit=146175 read=109120 written=212
                                       ->  Hash  (cost=2073224.88..2073224.88 rows=4103939 width=4) (actual time=57866.176..57866.176 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=620865 read=453053 dirtied=653 written=651
                                             ->  HashAggregate  (cost=1980886.25..2032185.49 rows=4103939 width=8) (actual time=50069.778..57863.582 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=620865 read=453053 dirtied=653 written=651
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1678563.50 rows=60464550 width=8) (actual time=0.011..15085.917 rows=60044664 loops=1)
                                                         Buffers: shared hit=620865 read=453053 dirtied=653 written=651
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1366.192..1366.192 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=2 read=35276 written=41
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.014..878.667 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276 written=41
 Planning time: 5.603 ms
 Execution time: 90049.020 ms
(42 rows)

COMMIT;
COMMIT