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=10149706.53..10149709.28 rows=100 width=39) (actual time=84420.376..84420.686 rows=99 loops=1)
   Buffers: shared hit=1517705 read=904057 written=13
   ->  GroupAggregate  (cost=10149706.53..10975334.74 rows=30022844 width=39) (actual time=84420.371..84420.667 rows=99 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1517705 read=904057 written=13
         ->  Sort  (cost=10149706.53..10224763.64 rows=30022844 width=39) (actual time=84420.349..84420.387 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=1517705 read=904057 written=13
               ->  Hash Join  (cost=2882265.32..5599996.76 rows=30022844 width=39) (actual time=61928.392..84418.752 rows=693 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1517693 read=904057 written=13
                     ->  Seq Scan on lineitem  (cost=0.00..1666931.89 rows=60045689 width=8) (actual time=0.079..11959.528 rows=59985329 loops=1)
                           Buffers: shared hit=572223 read=494252 written=3
                     ->  Hash  (cost=2788421.67..2788421.67 rows=7507492 width=39) (actual time=61439.815..61439.815 rows=99 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65543kB
                           Buffers: shared hit=945470 read=409805 written=10
                           ->  Hash Join  (cost=2175910.61..2788421.67 rows=7507492 width=39) (actual time=51442.486..61439.125 rows=99 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=945470 read=409805 written=10
                                 ->  Hash Join  (cost=2106882.61..2606781.29 rows=7507492 width=20) (actual time=50092.056..60083.947 rows=99 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=910226 read=409771 written=10
                                       ->  Seq Scan on orders  (cost=0.00..403671.84 rows=15014984 width=16) (actual time=0.013..4224.134 rows=15000000 loops=1)
                                             Buffers: shared hit=120916 read=132606 written=4
                                       ->  Hash  (cost=2056981.80..2056981.80 rows=3992065 width=4) (actual time=49888.880..49888.880 rows=99 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=789310 read=277165 written=6
                                             ->  HashAggregate  (cost=1967160.33..2017061.15 rows=3992065 width=8) (actual time=43901.901..49888.070 rows=99 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 313::double precision)
                                                   Rows Removed by Filter: 14999901
                                                   Buffers: shared hit=789310 read=277165 written=6
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1666931.89 rows=60045689 width=8) (actual time=0.010..14256.703 rows=59985329 loops=1)
                                                         Buffers: shared hit=789310 read=277165 written=6
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1343.104..1343.104 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35244 read=34
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.015..628.737 rows=1500000 loops=1)
                                             Buffers: shared hit=35244 read=34
 Planning time: 3.458 ms
 Execution time: 84551.284 ms
(42 rows)

COMMIT;
COMMIT