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) > 314
	)
	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=10372009.04..10372011.79 rows=100 width=39) (actual time=139298.862..139299.391 rows=84 loops=1)
   Buffers: shared hit=1510154 read=923521 written=63
   ->  GroupAggregate  (cost=10372009.04..11201755.26 rows=30172590 width=39) (actual time=139298.858..139299.375 rows=84 loops=1)
         Buffers: shared hit=1510154 read=923521 written=63
         ->  Sort  (cost=10372009.04..10447440.51 rows=30172590 width=39) (actual time=139298.829..139298.926 rows=588 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 70kB
               Buffers: shared hit=1510154 read=923521 written=63
               ->  Hash Join  (cost=3067232.81..5798523.26 rows=30172590 width=39) (actual time=95618.218..139294.546 rows=588 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1510140 read=923521 written=63
                     ->  Seq Scan on lineitem  (cost=0.00..1675249.80 rows=60345180 width=8) (actual time=0.028..28305.847 rows=60045826 loops=1)
                           Buffers: shared hit=586644 read=485154
                     ->  Hash  (cost=2972920.92..2972920.92 rows=7544952 width=39) (actual time=95531.076..95531.076 rows=84 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=923496 read=438367 written=63
                           ->  Hash Join  (cost=2187332.40..2972920.92 rows=7544952 width=39) (actual time=83534.041..95530.322 rows=84 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=923496 read=438367 written=63
                                 ->  Hash Join  (cost=2118304.40..2752993.88 rows=7544952 width=20) (actual time=81806.157..93791.130 rows=84 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=888218 read=438367 written=63
                                       ->  Seq Scan on orders  (cost=0.00..405686.04 rows=15089904 width=16) (actual time=0.015..6645.738 rows=15015000 loops=1)
                                             Buffers: shared hit=254787
                                       ->  Hash  (cost=2067829.87..2067829.87 rows=4037963 width=4) (actual time=81681.198..81681.198 rows=84 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=633431 read=438367 written=63
                                             ->  HashAggregate  (cost=1976975.70..2027450.24 rows=4037963 width=8) (actual time=72263.354..81680.530 rows=84 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 314::double precision)
                                                   Rows Removed by Filter: 15014916
                                                   Buffers: shared hit=633431 read=438367 written=63
                                                   ->  Seq Scan on lineitem  (cost=0.00..1675249.80 rows=60345180 width=8) (actual time=0.022..22772.831 rows=60045826 loops=1)
                                                         Buffers: shared hit=633431 read=438367 written=63
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1725.917..1725.917 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35278
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.013..991.830 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Total runtime: 139536.418 ms
(39 rows)

COMMIT;
COMMIT