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=10454213.49..10454216.24 rows=100 width=39) (actual time=127419.350..127419.560 rows=76 loops=1)
   Buffers: shared hit=1863561 read=589182
   ->  GroupAggregate  (cost=10454213.49..11290556.36 rows=30412468 width=39) (actual time=127419.345..127419.551 rows=76 loops=1)
         Buffers: shared hit=1863561 read=589182
         ->  Sort  (cost=10454213.49..10530244.66 rows=30412468 width=39) (actual time=127419.317..127419.331 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=1863561 read=589182
               ->  Hash Join  (cost=3089625.82..5842630.58 rows=30412468 width=39) (actual time=104499.672..127416.674 rows=532 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1863547 read=589182
                     ->  Seq Scan on lineitem  (cost=0.00..1688568.36 rows=60824936 width=8) (actual time=0.035..12589.248 rows=59984976 loops=1)
                           Buffers: shared hit=801143 read=279176
                     ->  Hash  (cost=2994563.97..2994563.97 rows=7604948 width=39) (actual time=104334.458..104334.458 rows=76 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=1062404 read=310006
                           ->  Hash Join  (cost=2203049.74..2994563.97 rows=7604948 width=39) (actual time=94314.607..104334.015 rows=76 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=1062404 read=310006
                                 ->  Hash Join  (cost=2134021.74..2773437.01 rows=7604948 width=20) (actual time=92356.239..102374.117 rows=76 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=1027126 read=310006
                                       ->  Seq Scan on orders  (cost=0.00..408911.95 rows=15209895 width=16) (actual time=0.032..4939.537 rows=15000000 loops=1)
                                             Buffers: shared hit=248349 read=8464
                                       ->  Hash  (cost=2083547.21..2083547.21 rows=4037963 width=4) (actual time=92205.002..92205.002 rows=76 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=778777 read=301542
                                             ->  HashAggregate  (cost=1992693.04..2043167.58 rows=4037963 width=8) (actual time=82572.352..92204.112 rows=76 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 14999924
                                                   Buffers: shared hit=778777 read=301542
                                                   ->  Seq Scan on lineitem  (cost=0.00..1688568.36 rows=60824936 width=8) (actual time=0.028..30485.007 rows=59984976 loops=1)
                                                         Buffers: shared hit=778777 read=301542
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1956.171..1956.171 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35278
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.016..1149.053 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Total runtime: 127651.808 ms
(39 rows)

COMMIT;
COMMIT