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=10333047.66..10333050.41 rows=100 width=39) (actual time=117331.248..117331.591 rows=100 loops=1)
   Buffers: shared hit=1246913 read=1177246 dirtied=656 written=336
   ->  GroupAggregate  (cost=10333047.66..11159498.07 rows=30052742 width=39) (actual time=117331.243..117331.572 rows=100 loops=1)
         Buffers: shared hit=1246913 read=1177246 dirtied=656 written=336
         ->  Sort  (cost=10333047.66..10408179.52 rows=30052742 width=39) (actual time=117331.221..117331.269 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: 85kB
               Buffers: shared hit=1246913 read=1177246 dirtied=656 written=336
               ->  Hash Join  (cost=3058143.04..5778589.85 rows=30052742 width=39) (actual time=88995.984..117327.137 rows=777 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1246899 read=1177246 dirtied=656 written=336
                     ->  Seq Scan on lineitem  (cost=0.00..1668600.84 rows=60105484 width=8) (actual time=0.030..15893.453 rows=60045603 loops=1)
                           Buffers: shared hit=688928 read=378618
                     ->  Hash  (cost=2964205.74..2964205.74 rows=7514984 width=39) (actual time=88827.846..88827.846 rows=111 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=557971 read=798628 dirtied=656 written=336
                           ->  Hash Join  (cost=2181112.22..2964205.74 rows=7514984 width=39) (actual time=77992.288..88826.754 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=557971 read=798628 dirtied=656 written=336
                                 ->  Hash Join  (cost=2112084.22..2744878.06 rows=7514984 width=20) (actual time=76501.280..87328.967 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=522786 read=798535 dirtied=656 written=336
                                       ->  Seq Scan on orders  (cost=0.00..404074.68 rows=15029968 width=16) (actual time=0.010..5645.545 rows=15015000 loops=1)
                                             Buffers: shared hit=61787 read=191988 dirtied=1 written=2
                                       ->  Hash  (cost=2061028.52..2061028.52 rows=4084456 width=4) (actual time=76339.128..76339.128 rows=111 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=460999 read=606547 dirtied=655 written=334
                                             ->  HashAggregate  (cost=1969128.26..2020183.96 rows=4084456 width=8) (actual time=65308.037..76338.192 rows=111 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014889
                                                   Buffers: shared hit=460999 read=606547 dirtied=655 written=334
                                                   ->  Seq Scan on lineitem  (cost=0.00..1668600.84 rows=60105484 width=8) (actual time=0.027..16782.922 rows=60045603 loops=1)
                                                         Buffers: shared hit=460999 read=606547 dirtied=655 written=334
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1489.181..1489.181 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35185 read=93
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.017..600.845 rows=1500000 loops=1)
                                             Buffers: shared hit=35185 read=93
 Total runtime: 117701.356 ms
(39 rows)

COMMIT;
COMMIT