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=10184991.27..10184994.02 rows=100 width=39) (actual time=106804.201..106804.481 rows=75 loops=1)
   Buffers: shared hit=1651218 read=777685 dirtied=605 written=459
   ->  GroupAggregate  (cost=10184991.27..11013087.08 rows=30112575 width=39) (actual time=106804.198..106804.467 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1651218 read=777685 dirtied=605 written=459
         ->  Sort  (cost=10184991.27..10260272.71 rows=30112575 width=39) (actual time=106804.180..106804.219 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=1651218 read=777685 dirtied=605 written=459
               ->  Hash Join  (cost=2895177.75..5621035.37 rows=30112575 width=39) (actual time=83692.752..106803.013 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1651206 read=777685 dirtied=605 written=459
                     ->  Seq Scan on lineitem  (cost=0.00..1671917.50 rows=60225150 width=8) (actual time=0.022..12276.444 rows=60045303 loops=1)
                           Buffers: shared hit=840766 read=228900 dirtied=605 written=355
                     ->  Hash  (cost=2801053.15..2801053.15 rows=7529968 width=39) (actual time=83463.767..83463.767 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=810440 read=548785 written=104
                           ->  Hash Join  (cost=2185709.11..2801053.15 rows=7529968 width=39) (actual time=73405.587..83463.257 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=810440 read=548785 written=104
                                 ->  Hash Join  (cost=2116681.11..2619075.62 rows=7529968 width=20) (actual time=71965.701..82017.789 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=810437 read=513510 written=30
                                       ->  Seq Scan on orders  (cost=0.00..404880.36 rows=15059936 width=16) (actual time=0.014..4264.101 rows=15015000 loops=1)
                                             Buffers: shared hit=175112 read=79169 written=23
                                       ->  Hash  (cost=2065381.88..2065381.88 rows=4103939 width=4) (actual time=71707.828..71707.828 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=635325 read=434341 written=7
                                             ->  HashAggregate  (cost=1973043.25..2024342.49 rows=4103939 width=8) (actual time=58225.524..71707.100 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=635325 read=434341 written=7
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1671917.50 rows=60225150 width=8) (actual time=0.030..15930.128 rows=60045303 loops=1)
                                                         Buffers: shared hit=635325 read=434341 written=7
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1426.817..1426.817 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=3 read=35275 written=74
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.015..836.845 rows=1500000 loops=1)
                                             Buffers: shared hit=3 read=35275 written=74
 Planning time: 4.668 ms
 Execution time: 108664.402 ms
(42 rows)

COMMIT;
COMMIT