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=10230376.82..10230379.57 rows=100 width=39) (actual time=93804.595..93804.830 rows=75 loops=1)
   Buffers: shared hit=1423342 read=1017448 written=500
   ->  GroupAggregate  (cost=10230376.82..11062586.22 rows=30262160 width=39) (actual time=93804.591..93804.815 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1423342 read=1017448 written=500
         ->  Sort  (cost=10230376.82..10306032.22 rows=30262160 width=39) (actual time=93804.579..93804.604 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=1423342 read=1017448 written=500
               ->  Hash Join  (cost=2903271.55..5642666.37 rows=30262160 width=39) (actual time=71572.763..93803.638 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1423330 read=1017448 written=500
                     ->  Seq Scan on lineitem  (cost=0.00..1680219.20 rows=60524320 width=8) (actual time=0.027..12803.093 rows=59983922 loops=1)
                           Buffers: shared hit=653729 read=421247
                     ->  Hash  (cost=2808677.95..2808677.95 rows=7567488 width=39) (actual time=71481.201..71481.201 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=769601 read=596201 written=500
                           ->  Hash Join  (cost=2191591.08..2808677.95 rows=7567488 width=39) (actual time=64782.929..71480.799 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=769601 read=596201 written=500
                                 ->  Hash Join  (cost=2122563.08..2626137.63 rows=7567488 width=20) (actual time=63255.380..69949.307 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=769599 read=560925 written=75
                                       ->  Seq Scan on orders  (cost=0.00..406897.75 rows=15134975 width=16) (actual time=0.010..3790.842 rows=15000000 loops=1)
                                             Buffers: shared hit=198173 read=57375 written=66
                                       ->  Hash  (cost=2072662.26..2072662.26 rows=3992065 width=4) (actual time=63110.667..63110.667 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=571426 read=503550 written=9
                                             ->  HashAggregate  (cost=1982840.80..2032741.61 rows=3992065 width=8) (actual time=54942.846..63110.205 rows=75 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 14999925
                                                   Buffers: shared hit=571426 read=503550 written=9
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1680219.20 rows=60524320 width=8) (actual time=0.011..14200.733 rows=59983922 loops=1)
                                                         Buffers: shared hit=571426 read=503550 written=9
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1508.881..1508.881 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=2 read=35276 written=425
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.016..845.941 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276 written=425
 Planning time: 5.284 ms
 Execution time: 93996.223 ms
(42 rows)

COMMIT;
COMMIT