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) > 312
	)
	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=10405874.84..10405877.59 rows=100 width=39) (actual time=105884.012..105884.595 rows=100 loops=1)
   Buffers: shared hit=1313290 read=1127758 dirtied=15 written=526
   ->  GroupAggregate  (cost=10405874.84..11238176.34 rows=30265509 width=39) (actual time=105884.008..105884.572 rows=100 loops=1)
         Buffers: shared hit=1313290 read=1127758 dirtied=15 written=526
         ->  Sort  (cost=10405874.84..10481538.61 rows=30265509 width=39) (actual time=105883.983..105884.095 rows=701 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 86kB
               Buffers: shared hit=1313290 read=1127758 dirtied=15 written=526
               ->  Hash Join  (cost=3077926.09..5817633.10 rows=30265509 width=39) (actual time=78648.674..105878.254 rows=784 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1313276 read=1127758 dirtied=15 written=526
                     ->  Seq Scan on lineitem  (cost=0.00..1680414.18 rows=60531018 width=8) (actual time=0.051..15155.298 rows=59983922 loops=1)
                           Buffers: shared hit=574508 read=500596 written=8
                     ->  Hash  (cost=2983332.49..2983332.49 rows=7567488 width=39) (actual time=78642.328..78642.328 rows=112 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=738768 read=627162 dirtied=15 written=518
                           ->  Hash Join  (cost=2195053.23..2983332.49 rows=7567488 width=39) (actual time=68907.779..78641.852 rows=112 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=738768 read=627162 dirtied=15 written=518
                                 ->  Hash Join  (cost=2126025.23..2762954.73 rows=7567488 width=20) (actual time=67642.586..77374.506 rows=112 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=703515 read=627137 dirtied=15 written=518
                                       ->  Seq Scan on orders  (cost=0.00..406897.75 rows=15134975 width=16) (actual time=0.013..4793.892 rows=15000000 loops=1)
                                             Buffers: shared hit=215810 read=39738 dirtied=15 written=518
                                       ->  Hash  (cost=2074969.53..2074969.53 rows=4084456 width=4) (actual time=67475.612..67475.612 rows=112 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=487705 read=587399
                                             ->  HashAggregate  (cost=1983069.27..2034124.97 rows=4084456 width=8) (actual time=58310.030..67474.746 rows=112 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 14999888
                                                   Buffers: shared hit=487705 read=587399
                                                   ->  Seq Scan on lineitem  (cost=0.00..1680414.18 rows=60531018 width=8) (actual time=0.018..16198.993 rows=59983922 loops=1)
                                                         Buffers: shared hit=487705 read=587399
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1263.635..1263.635 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35253 read=25
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.011..685.642 rows=1500000 loops=1)
                                             Buffers: shared hit=35253 read=25
 Total runtime: 106125.867 ms
(39 rows)

COMMIT;
COMMIT