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=10372124.93..10372127.68 rows=100 width=39) (actual time=117676.554..117676.847 rows=84 loops=1)
   Buffers: shared hit=2141963 read=291712 written=1
   ->  GroupAggregate  (cost=10372124.93..11201878.58 rows=30172860 width=39) (actual time=117676.551..117676.830 rows=84 loops=1)
         Buffers: shared hit=2141963 read=291712 written=1
         ->  Sort  (cost=10372124.93..10447557.08 rows=30172860 width=39) (actual time=117676.529..117676.573 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=2141963 read=291712 written=1
               ->  Hash Join  (cost=3067291.39..5798596.67 rows=30172860 width=39) (actual time=88011.280..117673.375 rows=588 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2141949 read=291712 written=1
                     ->  Seq Scan on lineitem  (cost=0.00..1675255.19 rows=60345719 width=8) (actual time=0.047..16564.428 rows=60045826 loops=1)
                           Buffers: shared hit=1034890 read=36908
                     ->  Hash  (cost=2972979.49..2972979.49 rows=7544952 width=39) (actual time=87914.163..87914.163 rows=84 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=1107059 read=254804 written=1
                           ->  Hash Join  (cost=2187379.76..2972979.49 rows=7544952 width=39) (actual time=77335.328..87913.478 rows=84 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=1107059 read=254804 written=1
                                 ->  Hash Join  (cost=2118351.76..2753052.45 rows=7544952 width=20) (actual time=75211.709..85788.210 rows=84 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=1081276 read=245309 written=1
                                       ->  Seq Scan on orders  (cost=0.00..405686.04 rows=15089904 width=16) (actual time=0.016..4896.712 rows=15015000 loops=1)
                                             Buffers: shared hit=254787
                                       ->  Hash  (cost=2067863.20..2067863.20 rows=4039085 width=4) (actual time=75059.851..75059.851 rows=84 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=826489 read=245309 written=1
                                             ->  HashAggregate  (cost=1976983.79..2027472.35 rows=4039085 width=8) (actual time=66127.376..75059.113 rows=84 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 314::double precision)
                                                   Rows Removed by Filter: 15014916
                                                   Buffers: shared hit=826489 read=245309 written=1
                                                   ->  Seq Scan on lineitem  (cost=0.00..1675255.19 rows=60345719 width=8) (actual time=0.024..18946.353 rows=60045826 loops=1)
                                                         Buffers: shared hit=826489 read=245309 written=1
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=2121.865..2121.865 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=25783 read=9495
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.016..1212.357 rows=1500000 loops=1)
                                             Buffers: shared hit=25783 read=9495
 Total runtime: 117957.908 ms
(39 rows)

COMMIT;
COMMIT