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) > 312
	)
	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=10332424.74..10332427.49 rows=100 width=39) (actual time=134632.737..134633.067 rows=100 loops=1)
   Buffers: shared hit=1336023 read=1088136 dirtied=1 written=15
   ->  GroupAggregate  (cost=10332424.74..11158878.67 rows=30052870 width=39) (actual time=134632.733..134633.047 rows=100 loops=1)
         Buffers: shared hit=1336023 read=1088136 dirtied=1 written=15
         ->  Sort  (cost=10332424.74..10407556.92 rows=30052870 width=39) (actual time=134632.713..134632.774 rows=701 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 85kB
               Buffers: shared hit=1336023 read=1088136 dirtied=1 written=15
               ->  Hash Join  (cost=3057492.76..5777946.61 rows=30052870 width=39) (actual time=98316.626..134628.670 rows=777 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1336009 read=1088136 dirtied=1 written=15
                     ->  Seq Scan on lineitem  (cost=0.00..1668603.40 rows=60105740 width=8) (actual time=0.067..21850.570 rows=60045603 loops=1)
                           Buffers: shared hit=582062 read=485484
                     ->  Hash  (cost=2963555.46..2963555.46 rows=7514984 width=39) (actual time=98154.464..98154.464 rows=111 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=753947 read=602652 dirtied=1 written=15
                           ->  Hash Join  (cost=2180607.30..2963555.46 rows=7514984 width=39) (actual time=87532.841..98149.581 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=753947 read=602652 dirtied=1 written=15
                                 ->  Hash Join  (cost=2111579.30..2744227.78 rows=7514984 width=20) (actual time=85986.840..96587.596 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=718762 read=602559 dirtied=1 written=15
                                       ->  Seq Scan on orders  (cost=0.00..404074.68 rows=15029968 width=16) (actual time=0.018..5541.175 rows=15015000 loops=1)
                                             Buffers: shared hit=170671 read=83104 dirtied=1 written=8
                                       ->  Hash  (cost=2060705.30..2060705.30 rows=4069920 width=4) (actual time=85845.947..85845.947 rows=111 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=548091 read=519455 written=7
                                             ->  HashAggregate  (cost=1969132.10..2020006.10 rows=4069920 width=8) (actual time=76422.416..85845.002 rows=111 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014889
                                                   Buffers: shared hit=548091 read=519455 written=7
                                                   ->  Seq Scan on lineitem  (cost=0.00..1668603.40 rows=60105740 width=8) (actual time=0.030..22242.293 rows=60045603 loops=1)
                                                         Buffers: shared hit=548091 read=519455 written=7
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1543.860..1543.860 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35185 read=93
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.025..828.900 rows=1500000 loops=1)
                                             Buffers: shared hit=35185 read=93
 Total runtime: 134989.868 ms
(39 rows)

COMMIT;
COMMIT