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=10322098.21..10322100.96 rows=100 width=39) (actual time=128074.591..128075.084 rows=84 loops=1)
   Buffers: shared hit=1225864 read=1195900 dirtied=209 written=3
   ->  GroupAggregate  (cost=10322098.21..11147723.01 rows=30022720 width=39) (actual time=128074.587..128075.066 rows=84 loops=1)
         Buffers: shared hit=1225864 read=1195900 dirtied=209 written=3
         ->  Sort  (cost=10322098.21..10397155.01 rows=30022720 width=39) (actual time=128074.551..128074.640 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=1225864 read=1195900 dirtied=209 written=3
               ->  Hash Join  (cost=3054683.63..5772408.23 rows=30022720 width=39) (actual time=91943.253..128070.243 rows=588 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1225850 read=1195900 dirtied=209 written=3
                     ->  Seq Scan on lineitem  (cost=0.00..1666929.40 rows=60045440 width=8) (actual time=0.109..22223.020 rows=59985329 loops=1)
                           Buffers: shared hit=160869 read=905606 written=1
                     ->  Hash  (cost=2960839.98..2960839.98 rows=7507492 width=39) (actual time=91186.375..91186.375 rows=84 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=1064981 read=290294 dirtied=209 written=2
                           ->  Hash Join  (cost=2178631.80..2960839.98 rows=7507492 width=39) (actual time=82699.346..91185.885 rows=84 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=1064981 read=290294 dirtied=209 written=2
                                 ->  Hash Join  (cost=2109603.80..2741662.14 rows=7507492 width=20) (actual time=80976.051..89437.904 rows=84 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=1029886 read=290111 dirtied=209 written=2
                                       ->  Seq Scan on orders  (cost=0.00..403671.84 rows=15014984 width=16) (actual time=0.011..3994.707 rows=15000000 loops=1)
                                             Buffers: shared hit=253522
                                       ->  Hash  (cost=2058729.80..2058729.80 rows=4069920 width=4) (actual time=80848.786..80848.786 rows=84 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=776364 read=290111 dirtied=209 written=2
                                             ->  HashAggregate  (cost=1967156.60..2018030.60 rows=4069920 width=8) (actual time=70774.279..80848.165 rows=84 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 314::double precision)
                                                   Rows Removed by Filter: 14999916
                                                   Buffers: shared hit=776364 read=290111 dirtied=209 written=2
                                                   ->  Seq Scan on lineitem  (cost=0.00..1666929.40 rows=60045440 width=8) (actual time=0.014..20246.981 rows=59985329 loops=1)
                                                         Buffers: shared hit=776364 read=290111 dirtied=209 written=2
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1721.178..1721.178 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35095 read=183
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.015..638.711 rows=1500000 loops=1)
                                             Buffers: shared hit=35095 read=183
 Total runtime: 128406.934 ms
(39 rows)

COMMIT;
COMMIT