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) > 312
	)
	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=10404118.21..10404120.96 rows=100 width=39) (actual time=120999.333..121000.000 rows=100 loops=1)
   Buffers: shared hit=1726622 read=714170 dirtied=135 written=80
   ->  GroupAggregate  (cost=10404118.21..11236324.17 rows=30262035 width=39) (actual time=120999.330..120999.977 rows=100 loops=1)
         Buffers: shared hit=1726622 read=714170 dirtied=135 written=80
         ->  Sort  (cost=10404118.21..10479773.30 rows=30262035 width=39) (actual time=120999.298..120999.442 rows=701 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 86kB
               Buffers: shared hit=1726622 read=714170 dirtied=135 written=80
               ->  Hash Join  (cost=3077039.75..5816427.69 rows=30262035 width=39) (actual time=89255.587..120993.693 rows=784 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1726608 read=714170 dirtied=135 written=80
                     ->  Seq Scan on lineitem  (cost=0.00..1680216.70 rows=60524070 width=8) (actual time=0.048..18591.180 rows=60044082 loops=1)
                           Buffers: shared hit=832442 read=242534 written=36
                     ->  Hash  (cost=2982446.15..2982446.15 rows=7567488 width=39) (actual time=89232.144..89232.144 rows=112 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=894166 read=471636 dirtied=135 written=44
                           ->  Hash Join  (cost=2194312.25..2982446.15 rows=7567488 width=39) (actual time=76682.354..89231.632 rows=112 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=894166 read=471636 dirtied=135 written=44
                                 ->  Hash Join  (cost=2125284.25..2762068.39 rows=7567488 width=20) (actual time=75017.469..87564.523 rows=112 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=859003 read=471521 dirtied=135 written=44
                                       ->  Seq Scan on orders  (cost=0.00..406897.75 rows=15134975 width=16) (actual time=0.011..6743.005 rows=15015000 loops=1)
                                             Buffers: shared hit=141544 read=114004 dirtied=45 written=44
                                       ->  Hash  (cost=2074410.25..2074410.25 rows=4069920 width=4) (actual time=74849.960..74849.960 rows=112 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=717459 read=357517 dirtied=90
                                             ->  HashAggregate  (cost=1982837.05..2033711.05 rows=4069920 width=8) (actual time=66191.192..74849.047 rows=112 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014888
                                                   Buffers: shared hit=717459 read=357517 dirtied=90
                                                   ->  Seq Scan on lineitem  (cost=0.00..1680216.70 rows=60524070 width=8) (actual time=0.021..20161.486 rows=60044082 loops=1)
                                                         Buffers: shared hit=717459 read=357517 dirtied=90
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1662.806..1662.806 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35163 read=115
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.021..915.895 rows=1500000 loops=1)
                                             Buffers: shared hit=35163 read=115
 Total runtime: 121274.511 ms
(39 rows)

COMMIT;
COMMIT