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=10235385.79..10235388.54 rows=100 width=39) (actual time=101454.549..101454.803 rows=75 loops=1)
   Buffers: shared hit=1506017 read=934773 written=246
   ->  GroupAggregate  (cost=10235385.79..11067592.41 rows=30262059 width=39) (actual time=101454.545..101454.790 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1506017 read=934773 written=246
         ->  Sort  (cost=10235385.79..10311040.94 rows=30262059 width=39) (actual time=101454.527..101454.570 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=1506017 read=934773 written=246
               ->  Hash Join  (cost=2908302.85..5647692.12 rows=30262059 width=39) (actual time=76652.836..101453.343 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1506005 read=934773 written=246
                     ->  Seq Scan on lineitem  (cost=0.00..1680217.18 rows=60524118 width=8) (actual time=0.028..13762.503 rows=60044082 loops=1)
                           Buffers: shared hit=727926 read=347050 written=1
                     ->  Hash  (cost=2813709.25..2813709.25 rows=7567488 width=39) (actual time=76483.645..76483.645 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=778079 read=587723 written=245
                           ->  Hash Join  (cost=2195503.63..2813709.25 rows=7567488 width=39) (actual time=66361.705..76483.134 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=778079 read=587723 written=245
                                 ->  Hash Join  (cost=2126475.63..2631168.93 rows=7567488 width=20) (actual time=65043.845..75158.803 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=769194 read=561330 written=88
                                       ->  Seq Scan on orders  (cost=0.00..406897.75 rows=15134975 width=16) (actual time=0.005..4044.561 rows=15015000 loops=1)
                                             Buffers: shared hit=194139 read=61409 written=87
                                       ->  Hash  (cost=2075176.40..2075176.40 rows=4103939 width=4) (actual time=64858.242..64858.242 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=575055 read=499921 written=1
                                             ->  HashAggregate  (cost=1982837.77..2034137.01 rows=4103939 width=8) (actual time=54997.328..64855.203 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=575055 read=499921 written=1
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1680217.18 rows=60524118 width=8) (actual time=0.036..16099.278 rows=60044082 loops=1)
                                                         Buffers: shared hit=575055 read=499921 written=1
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1303.564..1303.564 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=8885 read=26393 written=157
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.009..697.150 rows=1500000 loops=1)
                                             Buffers: shared hit=8885 read=26393 written=157
 Planning time: 6.614 ms
 Execution time: 101780.958 ms
(42 rows)

COMMIT;
COMMIT