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=10226846.98..10226849.73 rows=100 width=39) (actual time=77532.010..77532.298 rows=100 loops=1)
   Buffers: shared hit=1498739 read=939682 written=37
   ->  GroupAggregate  (cost=10226846.98..11058238.97 rows=30232436 width=39) (actual time=77532.007..77532.277 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1498739 read=939682 written=37
         ->  Sort  (cost=10226846.98..10302428.07 rows=30232436 width=39) (actual time=77531.990..77532.028 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=1498739 read=939682 written=37
               ->  Hash Join  (cost=2907157.70..5643859.70 rows=30232436 width=39) (actual time=59105.501..77530.182 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1498727 read=939682 written=37
                     ->  Seq Scan on lineitem  (cost=0.00..1678566.72 rows=60464872 width=8) (actual time=0.022..10737.561 rows=60044664 loops=1)
                           Buffers: shared hit=551561 read=522357
                     ->  Hash  (cost=2812657.75..2812657.75 rows=7559996 width=39) (actual time=58962.162..58962.162 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=947166 read=417325 written=37
                           ->  Hash Join  (cost=2194697.63..2812657.75 rows=7559996 width=39) (actual time=53163.154..58961.617 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=947166 read=417325 written=37
                                 ->  Hash Join  (cost=2125669.63..2630229.81 rows=7559996 width=20) (actual time=52227.927..58025.980 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=911888 read=417325 written=37
                                       ->  Seq Scan on orders  (cost=0.00..406494.91 rows=15119991 width=16) (actual time=0.009..2968.543 rows=15015000 loops=1)
                                             Buffers: shared hit=214835 read=40460 written=27
                                       ->  Hash  (cost=2073963.00..2073963.00 rows=4136530 width=4) (actual time=52120.812..52120.812 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=697053 read=376865 written=10
                                             ->  HashAggregate  (cost=1980891.08..2032597.70 rows=4136530 width=8) (actual time=43069.560..52120.289 rows=111 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014889
                                                   Buffers: shared hit=697053 read=376865 written=10
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1678566.72 rows=60464872 width=8) (actual time=0.006..12405.790 rows=60044664 loops=1)
                                                         Buffers: shared hit=697053 read=376865 written=10
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=925.026..925.026 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=0.016..489.639 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Planning time: 3.854 ms
 Execution time: 77792.067 ms
(42 rows)

COMMIT;
COMMIT