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=10164873.69..10164876.44 rows=100 width=39) (actual time=104374.918..104375.155 rows=75 loops=1)
   Buffers: shared hit=1569252 read=854905 dirtied=238 written=10
   ->  GroupAggregate  (cost=10164873.69..10991328.28 rows=30052894 width=39) (actual time=104374.913..104375.140 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1569252 read=854905 dirtied=238 written=10
         ->  Sort  (cost=10164873.69..10240005.93 rows=30052894 width=39) (actual time=104374.852..104374.882 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=1569252 read=854905 dirtied=238 written=10
               ->  Hash Join  (cost=2889937.21..5610392.40 rows=30052894 width=39) (actual time=79573.943..104373.442 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1569240 read=854905 dirtied=238 written=10
                     ->  Seq Scan on lineitem  (cost=0.00..1668603.89 rows=60105789 width=8) (actual time=0.041..13479.009 rows=60045603 loops=1)
                           Buffers: shared hit=774035 read=293511 dirtied=238 written=7
                     ->  Hash  (cost=2795999.91..2795999.91 rows=7514984 width=39) (actual time=79326.388..79326.388 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=795205 read=561394 written=3
                           ->  Hash Join  (cost=2181798.70..2795999.91 rows=7514984 width=39) (actual time=69302.123..79324.206 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=795205 read=561394 written=3
                                 ->  Hash Join  (cost=2112770.70..2614247.15 rows=7514984 width=20) (actual time=67983.760..77998.469 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=759927 read=561394 written=3
                                       ->  Seq Scan on orders  (cost=0.00..404074.68 rows=15029968 width=16) (actual time=0.014..4047.607 rows=15015000 loops=1)
                                             Buffers: shared hit=175960 read=77815
                                       ->  Hash  (cost=2061471.46..2061471.46 rows=4103939 width=4) (actual time=67762.101..67762.101 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=583967 read=483579 written=3
                                             ->  HashAggregate  (cost=1969132.83..2020432.07 rows=4103939 width=8) (actual time=57296.718..67761.310 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=583967 read=483579 written=3
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1668603.89 rows=60105789 width=8) (actual time=0.047..15883.302 rows=60045603 loops=1)
                                                         Buffers: shared hit=583967 read=483579 written=3
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1296.713..1296.713 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35278
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.029..619.263 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Planning time: 5.057 ms
 Execution time: 104690.357 ms
(42 rows)

COMMIT;
COMMIT