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=10400559.12..10400561.87 rows=100 width=39) (actual time=158488.968..158489.222 rows=75 loops=1)
   Buffers: shared hit=1158361 read=1282431 dirtied=1023 written=80
   ->  GroupAggregate  (cost=10400559.12..11232764.50 rows=30262014 width=39) (actual time=158488.965..158489.207 rows=75 loops=1)
         Buffers: shared hit=1158361 read=1282431 dirtied=1023 written=80
         ->  Sort  (cost=10400559.12..10476214.15 rows=30262014 width=39) (actual time=158488.943..158488.976 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=1158361 read=1282431 dirtied=1023 written=80
               ->  Hash Join  (cost=3073488.05..5812874.86 rows=30262014 width=39) (actual time=106902.922..158485.621 rows=525 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1158347 read=1282431 dirtied=1023 written=80
                     ->  Seq Scan on lineitem  (cost=0.00..1680216.29 rows=60524029 width=8) (actual time=0.039..37449.494 rows=60044082 loops=1)
                           Buffers: shared hit=431848 read=643128 dirtied=1023 written=80
                     ->  Hash  (cost=2978894.45..2978894.45 rows=7567488 width=39) (actual time=105144.545..105144.545 rows=75 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=726499 read=639303
                           ->  Hash Join  (cost=2191549.68..2978894.45 rows=7567488 width=39) (actual time=92021.318..105143.994 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=726499 read=639303
                                 ->  Hash Join  (cost=2122521.68..2758516.69 rows=7567488 width=20) (actual time=90466.692..103587.319 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=691223 read=639301
                                       ->  Seq Scan on orders  (cost=0.00..406897.75 rows=15134975 width=16) (actual time=0.023..6649.880 rows=15015000 loops=1)
                                             Buffers: shared hit=223403 read=32145
                                       ->  Hash  (cost=2072634.09..2072634.09 rows=3991007 width=4) (actual time=90199.538..90199.538 rows=75 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=467820 read=607156
                                             ->  HashAggregate  (cost=1982836.44..2032724.02 rows=3991007 width=8) (actual time=81281.277..90198.713 rows=75 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 15014925
                                                   Buffers: shared hit=467820 read=607156
                                                   ->  Seq Scan on lineitem  (cost=0.00..1680216.29 rows=60524029 width=8) (actual time=0.017..29537.669 rows=60044082 loops=1)
                                                         Buffers: shared hit=467820 read=607156
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1552.581..1552.581 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35276 read=2
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.019..817.191 rows=1500000 loops=1)
                                             Buffers: shared hit=35276 read=2
 Total runtime: 158704.264 ms
(39 rows)

COMMIT;
COMMIT