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) > 313
	)
	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=10245533.92..10245536.67 rows=100 width=39) (actual time=110235.481..110236.027 rows=100 loops=1)
   Buffers: shared hit=1577338 read=865845 dirtied=1068 written=118
   ->  GroupAggregate  (cost=10245533.92..11078568.90 rows=30292181 width=39) (actual time=110235.477..110235.999 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1577338 read=865845 dirtied=1068 written=118
         ->  Sort  (cost=10245533.92..10321264.37 rows=30292181 width=39) (actual time=110235.454..110235.523 rows=700 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 79kB
               Buffers: shared hit=1577338 read=865845 dirtied=1068 written=118
               ->  Hash Join  (cost=2910941.57..5653057.55 rows=30292181 width=39) (actual time=85713.184..110233.686 rows=700 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1577326 read=865845 dirtied=1068 written=118
                     ->  Seq Scan on lineitem  (cost=0.00..1681889.62 rows=60584362 width=8) (actual time=0.034..13421.540 rows=60044176 loops=1)
                           Buffers: shared hit=718956 read=357090 written=17
                     ->  Hash  (cost=2816254.32..2816254.32 rows=7574980 width=39) (actual time=85471.760..85471.760 rows=100 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=858370 read=508755 dirtied=1068 written=101
                           ->  Hash Join  (cost=2197477.29..2816254.32 rows=7574980 width=39) (actual time=75710.803..85471.052 rows=100 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=858370 read=508755 dirtied=1068 written=101
                                 ->  Hash Join  (cost=2128449.29..2633601.62 rows=7574980 width=20) (actual time=74232.251..83986.057 rows=100 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=858368 read=473479 dirtied=1068 written=58
                                       ->  Seq Scan on orders  (cost=0.00..407300.59 rows=15149959 width=16) (actual time=0.014..3965.106 rows=15015000 loops=1)
                                             Buffers: shared hit=216071 read=39730 written=52
                                       ->  Hash  (cost=2077150.06..2077150.06 rows=4103939 width=4) (actual time=74062.648..74062.648 rows=100 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=642297 read=433749 dirtied=1068 written=6
                                             ->  HashAggregate  (cost=1984811.43..2036110.67 rows=4103939 width=8) (actual time=61451.030..74061.700 rows=100 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 313::double precision)
                                                   Rows Removed by Filter: 15014900
                                                   Buffers: shared hit=642297 read=433749 dirtied=1068 written=6
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1681889.62 rows=60584362 width=8) (actual time=59.713..15894.672 rows=60044176 loops=1)
                                                         Buffers: shared hit=642297 read=433749 dirtied=1068 written=6
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1464.886..1464.886 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=2 read=35276 written=43
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.019..859.910 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276 written=43
 Planning time: 6.925 ms
 Execution time: 110561.866 ms
(42 rows)

COMMIT;
COMMIT