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=10173466.74..10173469.49 rows=100 width=39) (actual time=77051.610..77051.824 rows=75 loops=1)
   Buffers: shared hit=1537662 read=888872 dirtied=1078 written=7
   ->  GroupAggregate  (cost=10173466.74..11000740.16 rows=30082670 width=39) (actual time=77051.607..77051.812 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1537662 read=888872 dirtied=1078 written=7
         ->  Sort  (cost=10173466.74..10248673.41 rows=30082670 width=39) (actual time=77051.588..77051.615 rows=525 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=1537662 read=888872 dirtied=1078 written=7
               ->  Hash Join  (cost=2891105.36..5614260.23 rows=30082670 width=39) (actual time=56552.120..77050.325 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1537650 read=888872 dirtied=1078 written=7
                     ->  Seq Scan on lineitem  (cost=0.00..1670261.41 rows=60165341 width=8) (actual time=0.040..10189.823 rows=60045379 loops=1)
                           Buffers: shared hit=505249 read=563359 written=3
                     ->  Hash  (cost=2797074.41..2797074.41 rows=7522476 width=39) (actual time=56438.314..56438.314 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=1032401 read=325513 dirtied=1078 written=4
                           ->  Hash Join  (cost=2182624.50..2797074.41 rows=7522476 width=39) (actual time=50407.780..56437.850 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=1032401 read=325513 dirtied=1078 written=4
                                 ->  Hash Join  (cost=2113596.50..2615209.27 rows=7522476 width=20) (actual time=49270.390..55297.653 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=1032399 read=290237 dirtied=1078 written=4
                                       ->  Seq Scan on orders  (cost=0.00..404477.52 rows=15044952 width=16) (actual time=0.007..2551.885 rows=15015000 loops=1)
                                             Buffers: shared hit=244324 read=9704 dirtied=17 written=1
                                       ->  Hash  (cost=2062700.65..2062700.65 rows=4071668 width=4) (actual time=49137.232..49137.232 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=788075 read=280533 dirtied=1061 written=3
                                             ->  HashAggregate  (cost=1971088.12..2021983.97 rows=4071668 width=8) (actual time=40009.149..49136.499 rows=75 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 15014925
                                                   Buffers: shared hit=788075 read=280533 dirtied=1061 written=3
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1670261.41 rows=60165341 width=8) (actual time=0.013..12013.563 rows=60045379 loops=1)
                                                         Buffers: shared hit=788075 read=280533 dirtied=1061 written=3
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1120.532..1120.532 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=2 read=35276
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.026..671.051 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276
 Planning time: 3.978 ms
 Execution time: 77288.620 ms
(42 rows)

COMMIT;
COMMIT