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=10351445.77..10351448.52 rows=100 width=39) (actual time=152709.839..152710.193 rows=75 loops=1)
   Buffers: shared hit=1039958 read=1388947 written=40
   ->  GroupAggregate  (cost=10351445.77..11179541.47 rows=30112571 width=39) (actual time=152709.836..152710.186 rows=75 loops=1)
         Buffers: shared hit=1039958 read=1388947 written=40
         ->  Sort  (cost=10351445.77..10426727.19 rows=30112571 width=39) (actual time=152709.812..152709.863 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=1039958 read=1388947 written=40
               ->  Hash Join  (cost=3061632.98..5787490.39 rows=30112571 width=39) (actual time=110619.901..152706.116 rows=525 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1039944 read=1388947 written=40
                     ->  Seq Scan on lineitem  (cost=0.00..1671917.42 rows=60225142 width=8) (actual time=0.039..25952.158 rows=60045303 loops=1)
                           Buffers: shared hit=232078 read=837588
                     ->  Hash  (cost=2967508.38..2967508.38 rows=7529968 width=39) (actual time=110580.331..110580.331 rows=75 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=807866 read=551359 written=40
                           ->  Hash Join  (cost=2183399.83..2967508.38 rows=7529968 width=39) (actual time=100995.801..110579.372 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=807866 read=551359 written=40
                                 ->  Hash Join  (cost=2114371.83..2747881.02 rows=7529968 width=20) (actual time=98796.554..108376.262 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=773255 read=550692 written=40
                                       ->  Seq Scan on orders  (cost=0.00..404880.36 rows=15059936 width=16) (actual time=0.022..4890.672 rows=15015000 loops=1)
                                             Buffers: shared hit=254281
                                       ->  Hash  (cost=2063897.30..2063897.30 rows=4037963 width=4) (actual time=98677.303..98677.303 rows=75 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=518974 read=550692 written=40
                                             ->  HashAggregate  (cost=1973043.13..2023517.67 rows=4037963 width=8) (actual time=89471.430..98676.338 rows=75 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 15014925
                                                   Buffers: shared hit=518974 read=550692 written=40
                                                   ->  Seq Scan on lineitem  (cost=0.00..1671917.42 rows=60225142 width=8) (actual time=0.048..32939.106 rows=60045303 loops=1)
                                                         Buffers: shared hit=518974 read=550692 written=40
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=2197.282..2197.282 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=34611 read=667
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.018..1308.414 rows=1500000 loops=1)
                                             Buffers: shared hit=34611 read=667
 Total runtime: 153069.210 ms
(39 rows)

COMMIT;
COMMIT