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=10446917.21..10446919.96 rows=100 width=39) (actual time=233659.065..233659.563 rows=76 loops=1)
   Buffers: shared hit=1207939 read=1242677 written=56
   ->  GroupAggregate  (cost=10446917.21..11282520.08 rows=30385559 width=39) (actual time=233659.061..233659.543 rows=76 loops=1)
         Buffers: shared hit=1207939 read=1242677 written=56
         ->  Sort  (cost=10446917.21..10522881.10 rows=30385559 width=39) (actual time=233659.030..233659.130 rows=532 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=1207939 read=1242677 written=56
               ->  Hash Join  (cost=3089029.09..5839607.86 rows=30385559 width=39) (actual time=161457.625..233654.712 rows=532 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1207925 read=1242677 written=56
                     ->  Seq Scan on lineitem  (cost=0.00..1687084.18 rows=60771118 width=8) (actual time=0.057..56158.853 rows=59985538 loops=1)
                           Buffers: shared hit=527260 read=552122 written=54
                     ->  Hash  (cost=2994060.89..2994060.89 rows=7597456 width=39) (actual time=161221.233..161221.233 rows=76 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=680665 read=690555 written=2
                           ->  Hash Join  (cost=2202848.08..2994060.89 rows=7597456 width=39) (actual time=143927.340..161220.775 rows=76 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=680665 read=690555 written=2
                                 ->  Hash Join  (cost=2133820.08..2773083.77 rows=7597456 width=20) (actual time=141156.824..158448.863 rows=76 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=645387 read=690555 written=2
                                       ->  Seq Scan on orders  (cost=0.00..408509.11 rows=15194911 width=16) (actual time=0.018..10999.295 rows=15000000 loops=1)
                                             Buffers: shared hit=253012 read=3548
                                       ->  Hash  (cost=2082797.32..2082797.32 rows=4081820 width=4) (actual time=140782.151..140782.151 rows=76 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=392375 read=687007 written=2
                                             ->  HashAggregate  (cost=1990956.38..2041979.12 rows=4081820 width=8) (actual time=130669.135..140781.417 rows=76 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 14999924
                                                   Buffers: shared hit=392375 read=687007 written=2
                                                   ->  Seq Scan on lineitem  (cost=0.00..1687098.25 rows=60771625 width=8) (actual time=0.022..72681.647 rows=59985538 loops=1)
                                                         Buffers: shared hit=392375 read=687007 written=2
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=2768.752..2768.752 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35278
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.031..1927.386 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Total runtime: 233995.168 ms
(39 rows)

COMMIT;
COMMIT