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=10330991.04..10330993.79 rows=100 width=39) (actual time=150250.626..150251.238 rows=100 loops=1)
   Buffers: shared hit=1264083 read=1160076 dirtied=1 written=1
   ->  GroupAggregate  (cost=10330991.04..11157445.52 rows=30052890 width=39) (actual time=150250.623..150251.227 rows=100 loops=1)
         Buffers: shared hit=1264083 read=1160076 dirtied=1 written=1
         ->  Sort  (cost=10330991.04..10406123.27 rows=30052890 width=39) (actual time=150250.596..150250.713 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=1264083 read=1160076 dirtied=1 written=1
               ->  Hash Join  (cost=3056055.31..5776510.28 rows=30052890 width=39) (actual time=110120.657..150245.265 rows=777 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1264069 read=1160076 dirtied=1 written=1
                     ->  Seq Scan on lineitem  (cost=0.00..1668603.81 rows=60105781 width=8) (actual time=0.047..25609.272 rows=60045603 loops=1)
                           Buffers: shared hit=476709 read=590837
                     ->  Hash  (cost=2962118.01..2962118.01 rows=7514984 width=39) (actual time=109974.295..109974.295 rows=111 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=787360 read=569239 dirtied=1 written=1
                           ->  Hash Join  (cost=2179489.42..2962118.01 rows=7514984 width=39) (actual time=99314.501..109973.369 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=787360 read=569239 dirtied=1 written=1
                                 ->  Hash Join  (cost=2110461.42..2742790.33 rows=7514984 width=20) (actual time=97516.756..108168.402 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=785306 read=536015 dirtied=1 written=1
                                       ->  Seq Scan on orders  (cost=0.00..404074.68 rows=15029968 width=16) (actual time=0.006..5727.485 rows=15015000 loops=1)
                                             Buffers: shared hit=253520 read=255
                                       ->  Hash  (cost=2059986.88..2059986.88 rows=4037963 width=4) (actual time=97273.650..97273.650 rows=111 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=531786 read=535760 dirtied=1 written=1
                                             ->  HashAggregate  (cost=1969132.72..2019607.25 rows=4037963 width=8) (actual time=86957.210..97272.236 rows=111 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014889
                                                   Buffers: shared hit=531786 read=535760 dirtied=1 written=1
                                                   ->  Seq Scan on lineitem  (cost=0.00..1668603.81 rows=60105781 width=8) (actual time=0.026..23960.641 rows=60045603 loops=1)
                                                         Buffers: shared hit=531786 read=535760 dirtied=1 written=1
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1796.177..1796.177 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=2054 read=33224
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.012..1033.188 rows=1500000 loops=1)
                                             Buffers: shared hit=2054 read=33224
 Total runtime: 150757.236 ms
(39 rows)

COMMIT;
COMMIT