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=10173596.01..10173598.76 rows=100 width=39) (actual time=101574.877..101575.191 rows=100 loops=1)
   Buffers: shared hit=1826481 read=600053 written=26
   ->  GroupAggregate  (cost=10173596.01..11000876.97 rows=30082944 width=39) (actual time=101574.873..101575.177 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1826481 read=600053 written=26
         ->  Sort  (cost=10173596.01..10248803.37 rows=30082944 width=39) (actual time=101574.852..101574.892 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=1826481 read=600053 written=26
               ->  Hash Join  (cost=2891176.59..5614346.49 rows=30082944 width=39) (actual time=78464.550..101573.239 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1826469 read=600053 written=26
                     ->  Seq Scan on lineitem  (cost=0.00..1670266.87 rows=60165887 width=8) (actual time=0.047..11395.890 rows=60045379 loops=1)
                           Buffers: shared hit=981498 read=87110 written=3
                     ->  Hash  (cost=2797145.64..2797145.64 rows=7522476 width=39) (actual time=78347.828..78347.828 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=844971 read=512943 written=23
                           ->  Hash Join  (cost=2182681.72..2797145.64 rows=7522476 width=39) (actual time=69222.608..78342.574 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=844971 read=512943 written=23
                                 ->  Hash Join  (cost=2113653.72..2615280.50 rows=7522476 width=20) (actual time=67919.110..77031.782 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=844969 read=477667 written=1
                                       ->  Seq Scan on orders  (cost=0.00..404477.52 rows=15044952 width=16) (actual time=0.010..3311.681 rows=15015000 loops=1)
                                             Buffers: shared hit=251865 read=2163 written=1
                                       ->  Hash  (cost=2062740.36..2062740.36 rows=4073069 width=4) (actual time=67715.325..67715.325 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=593104 read=475504
                                             ->  HashAggregate  (cost=1971096.31..2022009.67 rows=4073069 width=8) (actual time=55252.035..67711.686 rows=111 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014889
                                                   Buffers: shared hit=593104 read=475504
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1670266.87 rows=60165887 width=8) (actual time=0.013..14057.184 rows=60045379 loops=1)
                                                         Buffers: shared hit=593104 read=475504
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1291.307..1291.307 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=2 read=35276 written=22
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.013..803.723 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276 written=22
 Planning time: 5.152 ms
 Execution time: 101878.853 ms
(42 rows)

COMMIT;
COMMIT