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=10196679.05..10196681.80 rows=100 width=39) (actual time=79056.157..79056.386 rows=75 loops=1)
   Buffers: shared hit=1434619 read=996685 dirtied=1 written=130
   ->  GroupAggregate  (cost=10196679.05..11025610.72 rows=30142970 width=39) (actual time=79056.154..79056.377 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1434619 read=996685 dirtied=1 written=130
         ->  Sort  (cost=10196679.05..10272036.47 rows=30142970 width=39) (actual time=79056.139..79056.161 rows=525 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=1434619 read=996685 dirtied=1 written=130
               ->  Hash Join  (cost=2899295.27..5627898.64 rows=30142970 width=39) (actual time=59742.800..79055.130 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1434607 read=996685 dirtied=1 written=130
                     ->  Seq Scan on lineitem  (cost=0.00..1673599.41 rows=60285941 width=8) (actual time=0.052..10640.831 rows=60046221 loops=1)
                           Buffers: shared hit=653012 read=417728 dirtied=1
                     ->  Hash  (cost=2805077.02..2805077.02 rows=7537460 width=39) (actual time=59560.640..59560.640 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=781595 read=578957 written=130
                           ->  Hash Join  (cost=2188835.67..2805077.02 rows=7537460 width=39) (actual time=53187.685..59560.382 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=781595 read=578957 written=130
                                 ->  Hash Join  (cost=2119807.67..2622987.12 rows=7537460 width=20) (actual time=52262.086..58634.542 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=746418 read=578856 written=130
                                       ->  Seq Scan on orders  (cost=0.00..405283.20 rows=15074920 width=16) (actual time=0.008..3486.241 rows=15015000 loops=1)
                                             Buffers: shared hit=148235 read=106299 written=124
                                       ->  Hash  (cost=2068101.04..2068101.04 rows=4136530 width=4) (actual time=51797.994..51797.994 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=598183 read=472557 written=6
                                             ->  HashAggregate  (cost=1975029.12..2026735.74 rows=4136530 width=8) (actual time=42514.230..51797.610 rows=75 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 15014925
                                                   Buffers: shared hit=598183 read=472557 written=6
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1673599.41 rows=60285941 width=8) (actual time=0.019..12236.394 rows=60046221 loops=1)
                                                         Buffers: shared hit=598183 read=472557 written=6
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=910.104..910.104 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35177 read=101
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.017..471.558 rows=1500000 loops=1)
                                             Buffers: shared hit=35177 read=101
 Planning time: 3.983 ms
 Execution time: 79349.218 ms
(42 rows)

COMMIT;
COMMIT