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=10413001.18..10413003.93 rows=100 width=39) (actual time=144074.098..144074.534 rows=75 loops=1)
   Buffers: shared hit=1707326 read=735859 written=2
   ->  GroupAggregate  (cost=10413001.18..11246036.04 rows=30292177 width=39) (actual time=144074.093..144074.514 rows=75 loops=1)
         Buffers: shared hit=1707326 read=735859 written=2
         ->  Sort  (cost=10413001.18..10488731.62 rows=30292177 width=39) (actual time=144074.072..144074.148 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=1707326 read=735859 written=2
               ->  Hash Join  (cost=3078409.57..5820525.33 rows=30292177 width=39) (actual time=97411.727..144070.107 rows=525 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1707312 read=735859 written=2
                     ->  Seq Scan on lineitem  (cost=0.00..1681889.54 rows=60584354 width=8) (actual time=0.064..31881.418 rows=59984384 loops=1)
                           Buffers: shared hit=387525 read=688521 written=2
                     ->  Hash  (cost=2983722.32..2983722.32 rows=7574980 width=39) (actual time=96344.790..96344.790 rows=75 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=1319787 read=47338
                           ->  Hash Join  (cost=2195168.01..2983722.32 rows=7574980 width=39) (actual time=83692.649..96341.737 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=1319787 read=47338
                                 ->  Hash Join  (cost=2126140.01..2763194.72 rows=7574980 width=20) (actual time=82083.248..94729.852 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=1289251 read=42596
                                       ->  Seq Scan on orders  (cost=0.00..407300.59 rows=15149959 width=16) (actual time=0.016..6078.263 rows=15000000 loops=1)
                                             Buffers: shared hit=255801
                                       ->  Hash  (cost=2075665.48..2075665.48 rows=4037963 width=4) (actual time=81943.546..81943.546 rows=75 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=1033450 read=42596
                                             ->  HashAggregate  (cost=1984811.31..2035285.85 rows=4037963 width=8) (actual time=72804.891..81942.946 rows=75 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 14999925
                                                   Buffers: shared hit=1033450 read=42596
                                                   ->  Seq Scan on lineitem  (cost=0.00..1681889.54 rows=60584354 width=8) (actual time=0.035..26012.697 rows=59984384 loops=1)
                                                         Buffers: shared hit=1033450 read=42596
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1607.405..1607.405 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=30536 read=4742
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.015..957.580 rows=1500000 loops=1)
                                             Buffers: shared hit=30536 read=4742
 Total runtime: 144251.181 ms
(39 rows)

COMMIT;
COMMIT