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=10159864.50..10159867.25 rows=100 width=39) (actual time=95659.321..95659.583 rows=75 loops=1)
   Buffers: shared hit=1586370 read=837787 written=4
   ->  GroupAggregate  (cost=10159864.50..10986321.84 rows=30052994 width=39) (actual time=95659.318..95659.563 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1586370 read=837787 written=4
         ->  Sort  (cost=10159864.50..10234996.99 rows=30052994 width=39) (actual time=95659.304..95659.341 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=1586370 read=837787 written=4
               ->  Hash Join  (cost=2884905.88..5605366.57 rows=30052994 width=39) (actual time=72575.128..95658.058 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1586358 read=837787 written=4
                     ->  Seq Scan on lineitem  (cost=0.00..1668605.89 rows=60105989 width=8) (actual time=0.032..12922.155 rows=60045603 loops=1)
                           Buffers: shared hit=645493 read=422053 written=1
                     ->  Hash  (cost=2790968.58..2790968.58 rows=7514984 width=39) (actual time=72277.596..72277.596 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=940865 read=415734 written=3
                           ->  Hash Join  (cost=2177886.11..2790968.58 rows=7514984 width=39) (actual time=65091.826..72277.371 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=940865 read=415734 written=3
                                 ->  Hash Join  (cost=2108858.11..2609215.82 rows=7514984 width=20) (actual time=63781.036..70966.287 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=940863 read=380458 written=3
                                       ->  Seq Scan on orders  (cost=0.00..404074.68 rows=15029968 width=16) (actual time=0.010..3984.975 rows=15015000 loops=1)
                                             Buffers: shared hit=231424 read=22351
                                       ->  Hash  (cost=2058957.30..2058957.30 rows=3992065 width=4) (actual time=63616.055..63616.055 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=709439 read=358107 written=3
                                             ->  HashAggregate  (cost=1969135.83..2019036.65 rows=3992065 width=8) (actual time=53117.626..63615.671 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=709439 read=358107 written=3
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1668605.89 rows=60105989 width=8) (actual time=0.015..14818.398 rows=60045603 loops=1)
                                                         Buffers: shared hit=709439 read=358107 written=3
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1297.141..1297.141 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=2 read=35276
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.027..803.565 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276
 Planning time: 4.943 ms
 Execution time: 95905.474 ms
(42 rows)

COMMIT;
COMMIT