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=10193692.40..10193695.15 rows=100 width=39) (actual time=69205.374..69205.659 rows=100 loops=1)
   Buffers: shared hit=1498091 read=933213
   ->  GroupAggregate  (cost=10193692.40..11022616.35 rows=30142689 width=39) (actual time=69205.372..69205.644 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1498091 read=933213
         ->  Sort  (cost=10193692.40..10269049.12 rows=30142689 width=39) (actual time=69205.354..69205.390 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=1498091 read=933213
               ->  Hash Join  (cost=2896368.03..5624955.92 rows=30142689 width=39) (actual time=50721.881..69203.625 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1498079 read=933213
                     ->  Seq Scan on lineitem  (cost=0.00..1673593.78 rows=60285378 width=8) (actual time=0.028..10123.329 rows=59986308 loops=1)
                           Buffers: shared hit=541521 read=529219
                     ->  Hash  (cost=2802149.78..2802149.78 rows=7537460 width=39) (actual time=50445.632..50445.632 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=956558 read=403994
                           ->  Hash Join  (cost=2186557.05..2802149.78 rows=7537460 width=39) (actual time=45037.027..50445.192 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=956558 read=403994
                                 ->  Hash Join  (cost=2117529.05..2620059.88 rows=7537460 width=20) (actual time=44099.421..49507.298 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=921280 read=403994
                                       ->  Seq Scan on orders  (cost=0.00..405283.20 rows=15074920 width=16) (actual time=0.010..2705.068 rows=15000000 loops=1)
                                             Buffers: shared hit=249324 read=5210
                                       ->  Hash  (cost=2066633.20..2066633.20 rows=4071668 width=4) (actual time=43660.428..43660.428 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=671956 read=398784
                                             ->  HashAggregate  (cost=1975020.67..2025916.52 rows=4071668 width=8) (actual time=37990.547..43659.519 rows=111 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 14999889
                                                   Buffers: shared hit=671956 read=398784
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1673593.78 rows=60285378 width=8) (actual time=0.013..11680.086 rows=59986308 loops=1)
                                                         Buffers: shared hit=671956 read=398784
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=926.351..926.351 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35278
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.015..485.627 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Planning time: 3.712 ms
 Execution time: 69401.771 ms
(42 rows)

COMMIT;
COMMIT