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) > 315
	)
	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=10264498.15..10264500.90 rows=100 width=39) (actual time=86260.460..86260.690 rows=76 loops=1)
   Buffers: shared hit=1410139 read=1037834 written=316
   ->  GroupAggregate  (cost=10264498.15..11099195.61 rows=30352635 width=39) (actual time=86260.457..86260.681 rows=76 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1410139 read=1037834 written=316
         ->  Sort  (cost=10264498.15..10340379.73 rows=30352635 width=39) (actual time=86260.442..86260.470 rows=532 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 66kB
               Buffers: shared hit=1410139 read=1037834 written=316
               ->  Hash Join  (cost=2914838.16..5662421.11 rows=30352635 width=39) (actual time=65058.589..86259.205 rows=532 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1410127 read=1037834 written=316
                     ->  Seq Scan on lineitem  (cost=0.00..1685240.70 rows=60705270 width=8) (actual time=0.025..11266.005 rows=60044994 loops=1)
                           Buffers: shared hit=619905 read=458283 written=8
                     ->  Hash  (cost=2819963.61..2819963.61 rows=7589964 width=39) (actual time=64956.515..64956.515 rows=76 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=790222 read=579551 written=308
                           ->  Hash Join  (cost=2200352.47..2819963.61 rows=7589964 width=39) (actual time=55184.790..64956.172 rows=76 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=790222 read=579551 written=308
                                 ->  Hash Join  (cost=2131324.47..2637086.15 rows=7589964 width=20) (actual time=53858.960..63623.893 rows=76 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=790220 read=544275 written=236
                                       ->  Seq Scan on orders  (cost=0.00..408106.27 rows=15179927 width=16) (actual time=0.011..3881.533 rows=15015000 loops=1)
                                             Buffers: shared hit=157269 read=99038 written=234
                                       ->  Hash  (cost=2080411.10..2080411.10 rows=4073069 width=4) (actual time=53742.339..53742.339 rows=76 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=632951 read=445237 written=2
                                             ->  HashAggregate  (cost=1988767.05..2039680.41 rows=4073069 width=8) (actual time=44224.142..53741.850 rows=76 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 15014924
                                                   Buffers: shared hit=632951 read=445237 written=2
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1685240.70 rows=60705270 width=8) (actual time=0.024..13705.150 rows=60044994 loops=1)
                                                         Buffers: shared hit=632951 read=445237 written=2
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1310.546..1310.546 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=2 read=35276 written=72
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.011..790.040 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276 written=72
 Planning time: 4.709 ms
 Execution time: 86437.591 ms
(42 rows)

COMMIT;
COMMIT