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=10236890.77..10236893.52 rows=100 width=39) (actual time=77439.901..77440.131 rows=75 loops=1)
   Buffers: shared hit=1379431 read=1061359 written=133
   ->  GroupAggregate  (cost=10236890.77..11069101.82 rows=30262220 width=39) (actual time=77439.898..77440.120 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1379431 read=1061359 written=133
         ->  Sort  (cost=10236890.77..10312546.32 rows=30262220 width=39) (actual time=77439.877..77439.914 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=1379431 read=1061359 written=133
               ->  Hash Join  (cost=2909774.29..5649172.43 rows=30262220 width=39) (actual time=57918.157..77438.951 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1379419 read=1061359 written=133
                     ->  Seq Scan on lineitem  (cost=0.00..1680220.41 rows=60524441 width=8) (actual time=0.028..10522.524 rows=59983922 loops=1)
                           Buffers: shared hit=716924 read=358052
                     ->  Hash  (cost=2815180.69..2815180.69 rows=7567488 width=39) (actual time=57831.193..57831.193 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=662495 read=703307 written=133
                           ->  Hash Join  (cost=2196649.17..2815180.69 rows=7567488 width=39) (actual time=49305.704..57830.958 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=662495 read=703307 written=133
                                 ->  Hash Join  (cost=2127621.17..2632640.37 rows=7567488 width=20) (actual time=48305.499..56830.510 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=627322 read=703202 written=133
                                       ->  Seq Scan on orders  (cost=0.00..406897.75 rows=15134975 width=16) (actual time=0.009..3549.970 rows=15000000 loops=1)
                                             Buffers: shared hit=95934 read=159614 written=133
                                       ->  Hash  (cost=2075914.54..2075914.54 rows=4136530 width=4) (actual time=48175.210..48175.210 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=531388 read=543588
                                             ->  HashAggregate  (cost=1982842.62..2034549.24 rows=4136530 width=8) (actual time=40131.032..48174.863 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=531388 read=543588
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1680220.41 rows=60524441 width=8) (actual time=0.011..11954.568 rows=59983922 loops=1)
                                                         Buffers: shared hit=531388 read=543588
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=989.212..989.212 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35173 read=105
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.016..483.693 rows=1500000 loops=1)
                                             Buffers: shared hit=35173 read=105
 Planning time: 3.859 ms
 Execution time: 77602.297 ms
(42 rows)

COMMIT;
COMMIT