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) > 313
	)
	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=10318542.79..10318545.54 rows=100 width=39) (actual time=64569.069..64569.355 rows=99 loops=1)
   Buffers: shared hit=1736830 read=684934 dirtied=254
   ->  GroupAggregate  (cost=10318542.79..11144167.04 rows=30022700 width=39) (actual time=64569.064..64569.340 rows=99 loops=1)
         Buffers: shared hit=1736830 read=684934 dirtied=254
         ->  Sort  (cost=10318542.79..10393599.54 rows=30022700 width=39) (actual time=64569.024..64569.064 rows=693 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 79kB
               Buffers: shared hit=1736830 read=684934 dirtied=254
               ->  Hash Join  (cost=3051131.94..5768855.45 rows=30022700 width=39) (actual time=47571.780..64565.248 rows=693 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1736816 read=684934 dirtied=254
                     ->  Seq Scan on lineitem  (cost=0.00..1666929.00 rows=60045400 width=8) (actual time=0.014..10009.474 rows=60045669 loops=1)
                           Buffers: shared hit=754584 read=311891
                     ->  Hash  (cost=2957288.29..2957288.29 rows=7507492 width=39) (actual time=47194.502..47194.502 rows=99 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 7kB
                           Buffers: shared hit=982232 read=373043 dirtied=254
                           ->  Hash Join  (cost=2175869.25..2957288.29 rows=7507492 width=39) (actual time=41675.701..47193.791 rows=99 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=982232 read=373043 dirtied=254
                                 ->  Hash Join  (cost=2106841.25..2738110.46 rows=7507492 width=20) (actual time=40716.309..46233.925 rows=99 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=982230 read=337767 dirtied=254
                                       ->  Seq Scan on orders  (cost=0.00..403671.84 rows=15014984 width=16) (actual time=0.007..3366.290 rows=15015000 loops=1)
                                             Buffers: shared hit=802 read=252720 dirtied=254
                                       ->  Hash  (cost=2056953.66..2056953.66 rows=3991007 width=4) (actual time=40584.185..40584.185 rows=99 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=981428 read=85047
                                             ->  HashAggregate  (cost=1967156.00..2017043.59 rows=3991007 width=8) (actual time=35069.198..40583.066 rows=99 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 313::double precision)
                                                   Rows Removed by Filter: 15014901
                                                   Buffers: shared hit=981428 read=85047
                                                   ->  Seq Scan on lineitem  (cost=0.00..1666929.00 rows=60045400 width=8) (actual time=0.009..11950.431 rows=60045669 loops=1)
                                                         Buffers: shared hit=981428 read=85047
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=957.278..957.278 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=2 read=35276
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.011..556.033 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276
 Total runtime: 64635.044 ms
(39 rows)

COMMIT;
COMMIT