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) > 314
	)
	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=10405176.35..10405179.10 rows=100 width=39) (actual time=98981.627..98982.145 rows=85 loops=1)
   Buffers: shared hit=1566473 read=874319 dirtied=1074 written=1
   ->  GroupAggregate  (cost=10405176.35..11237377.55 rows=30261862 width=39) (actual time=98981.621..98982.123 rows=85 loops=1)
         Buffers: shared hit=1566473 read=874319 dirtied=1074 written=1
         ->  Sort  (cost=10405176.35..10480831.00 rows=30261862 width=39) (actual time=98981.592..98981.668 rows=595 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 71kB
               Buffers: shared hit=1566473 read=874319 dirtied=1074 written=1
               ->  Hash Join  (cost=3078137.18..5817515.58 rows=30261862 width=39) (actual time=69771.700..98977.126 rows=595 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1566459 read=874319 dirtied=1074 written=1
                     ->  Seq Scan on lineitem  (cost=0.00..1680213.23 rows=60523723 width=8) (actual time=0.079..16575.355 rows=60044082 loops=1)
                           Buffers: shared hit=436651 read=638325
                     ->  Hash  (cost=2983543.58..2983543.58 rows=7567488 width=39) (actual time=69641.967..69641.967 rows=85 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=1129808 read=235994 dirtied=1074 written=1
                           ->  Hash Join  (cost=2195164.65..2983543.58 rows=7567488 width=39) (actual time=60855.391..69641.533 rows=85 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=1129808 read=235994 dirtied=1074 written=1
                                 ->  Hash Join  (cost=2126136.65..2763165.82 rows=7567488 width=20) (actual time=59540.375..68324.990 rows=85 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=1094625 read=235899 dirtied=1074 written=1
                                       ->  Seq Scan on orders  (cost=0.00..406897.75 rows=15134975 width=16) (actual time=0.019..4436.951 rows=15015000 loops=1)
                                             Buffers: shared hit=251349 read=4199 dirtied=4 written=1
                                       ->  Hash  (cost=2074956.36..2074956.36 rows=4094423 width=4) (actual time=59427.452..59427.452 rows=85 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=843276 read=231700 dirtied=1070
                                             ->  HashAggregate  (cost=1982831.85..2034012.13 rows=4094423 width=8) (actual time=52794.870..59426.778 rows=85 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 314::double precision)
                                                   Rows Removed by Filter: 15014915
                                                   Buffers: shared hit=843276 read=231700 dirtied=1070
                                                   ->  Seq Scan on lineitem  (cost=0.00..1680213.23 rows=60523723 width=8) (actual time=0.014..15708.869 rows=60044082 loops=1)
                                                         Buffers: shared hit=843276 read=231700 dirtied=1070
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1312.988..1312.988 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35183 read=95
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.018..691.814 rows=1500000 loops=1)
                                             Buffers: shared hit=35183 read=95
 Total runtime: 99150.150 ms
(39 rows)

COMMIT;
COMMIT