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=10402684.47..10402687.22 rows=100 width=39) (actual time=136057.351..136057.893 rows=85 loops=1)
   Buffers: shared hit=1420492 read=1020300 dirtied=987 written=775
   ->  GroupAggregate  (cost=10402684.47..11234890.99 rows=30262055 width=39) (actual time=136057.347..136057.871 rows=85 loops=1)
         Buffers: shared hit=1420492 read=1020300 dirtied=987 written=775
         ->  Sort  (cost=10402684.47..10478339.61 rows=30262055 width=39) (actual time=136057.315..136057.437 rows=595 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 71kB
               Buffers: shared hit=1420492 read=1020300 dirtied=987 written=775
               ->  Hash Join  (cost=3075602.28..5814991.33 rows=30262055 width=39) (actual time=96184.783..136052.719 rows=595 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1420478 read=1020300 dirtied=987 written=775
                     ->  Seq Scan on lineitem  (cost=0.00..1680217.10 rows=60524110 width=8) (actual time=0.041..25650.454 rows=60044082 loops=1)
                           Buffers: shared hit=522475 read=552501
                     ->  Hash  (cost=2981008.68..2981008.68 rows=7567488 width=39) (actual time=94550.939..94550.939 rows=85 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=898003 read=467799 dirtied=987 written=775
                           ->  Hash Join  (cost=2193194.35..2981008.68 rows=7567488 width=39) (actual time=82154.136..94550.329 rows=85 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=898003 read=467799 dirtied=987 written=775
                                 ->  Hash Join  (cost=2124166.35..2760630.92 rows=7567488 width=20) (actual time=80349.688..92735.580 rows=85 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=862725 read=467799 dirtied=987 written=775
                                       ->  Seq Scan on orders  (cost=0.00..406897.75 rows=15134975 width=16) (actual time=0.024..6370.805 rows=15015000 loops=1)
                                             Buffers: shared hit=225063 read=30485
                                       ->  Hash  (cost=2073691.82..2073691.82 rows=4037963 width=4) (actual time=80121.342..80121.342 rows=85 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=637662 read=437314 dirtied=987 written=775
                                             ->  HashAggregate  (cost=1982837.65..2033312.19 rows=4037963 width=8) (actual time=71091.258..80120.769 rows=85 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 314::double precision)
                                                   Rows Removed by Filter: 15014915
                                                   Buffers: shared hit=637662 read=437314 dirtied=987 written=775
                                                   ->  Seq Scan on lineitem  (cost=0.00..1680217.10 rows=60524110 width=8) (actual time=0.038..22849.708 rows=60044082 loops=1)
                                                         Buffers: shared hit=637662 read=437314 dirtied=987 written=775
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1802.394..1802.394 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=0.021..1024.464 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Total runtime: 136347.209 ms
(39 rows)

COMMIT;
COMMIT