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=10190373.87..10190376.62 rows=100 width=39) (actual time=85794.559..85794.791 rows=75 loops=1)
   Buffers: shared hit=1472243 read=958180 dirtied=391 written=4466
   ->  GroupAggregate  (cost=10190373.87..11019062.25 rows=30134123 width=39) (actual time=85794.556..85794.779 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1472243 read=958180 dirtied=391 written=4466
         ->  Sort  (cost=10190373.87..10265709.18 rows=30134123 width=39) (actual time=85794.529..85794.559 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=1472243 read=958180 dirtied=391 written=4466
               ->  Hash Join  (cost=2895195.04..5622997.80 rows=30134123 width=39) (actual time=61133.854..85793.263 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1472231 read=958180 dirtied=391 written=4466
                     ->  Seq Scan on lineitem  (cost=0.00..1673108.46 rows=60268246 width=8) (actual time=0.036..12549.066 rows=59985781 loops=1)
                           Buffers: shared hit=648740 read=421686
                     ->  Hash  (cost=2801070.44..2801070.44 rows=7529968 width=39) (actual time=61066.179..61066.179 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=823491 read=536494 dirtied=391 written=4466
                           ->  Hash Join  (cost=2186035.10..2801070.44 rows=7529968 width=39) (actual time=51594.775..61065.821 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=823491 read=536494 dirtied=391 written=4466
                                 ->  Hash Join  (cost=2117007.10..2619092.92 rows=7529968 width=20) (actual time=50432.826..59897.927 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=799072 read=525635 dirtied=391 written=3978
                                       ->  Seq Scan on orders  (cost=0.00..404880.36 rows=15059936 width=16) (actual time=0.010..3886.918 rows=15000000 loops=1)
                                             Buffers: shared hit=176460 read=77821 written=3628
                                       ->  Hash  (cost=2066093.74..2066093.74 rows=4073069 width=4) (actual time=50235.015..50235.015 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=622612 read=447814 dirtied=391 written=350
                                             ->  HashAggregate  (cost=1974449.69..2025363.05 rows=4073069 width=8) (actual time=43328.692..50234.561 rows=75 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 14999925
                                                   Buffers: shared hit=622612 read=447814 dirtied=391 written=350
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1673108.46 rows=60268246 width=8) (actual time=0.010..13108.979 rows=59985781 loops=1)
                                                         Buffers: shared hit=622612 read=447814 dirtied=391 written=350
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1147.018..1147.018 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=24419 read=10859 written=488
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.014..632.017 rows=1500000 loops=1)
                                             Buffers: shared hit=24419 read=10859 written=488
 Planning time: 4.699 ms
 Execution time: 86170.793 ms
(42 rows)

COMMIT;
COMMIT