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=10171464.88..10171467.63 rows=100 width=39) (actual time=73747.507..73747.747 rows=75 loops=1)
   Buffers: shared hit=1541752 read=884782 dirtied=1426 written=6366
   ->  GroupAggregate  (cost=10171464.88..10998741.30 rows=30082779 width=39) (actual time=73747.503..73747.735 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1541752 read=884782 dirtied=1426 written=6366
         ->  Sort  (cost=10171464.88..10246671.82 rows=30082779 width=39) (actual time=73747.480..73747.517 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=1541752 read=884782 dirtied=1426 written=6366
               ->  Hash Join  (cost=2889079.70..5612240.54 rows=30082779 width=39) (actual time=54774.757..73746.105 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1541740 read=884782 dirtied=1426 written=6366
                     ->  Seq Scan on lineitem  (cost=0.00..1670263.58 rows=60165558 width=8) (actual time=0.026..10330.434 rows=60045379 loops=1)
                           Buffers: shared hit=686088 read=382520 dirtied=398 written=395
                     ->  Hash  (cost=2795048.75..2795048.75 rows=7522476 width=39) (actual time=54663.750..54663.750 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=855652 read=502262 dirtied=1028 written=5971
                           ->  Hash Join  (cost=2181049.71..2795048.75 rows=7522476 width=39) (actual time=46875.151..54663.101 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=855652 read=502262 dirtied=1028 written=5971
                                 ->  Hash Join  (cost=2112021.71..2613183.60 rows=7522476 width=20) (actual time=45682.864..53463.866 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=855650 read=466986 dirtied=1028 written=136
                                       ->  Seq Scan on orders  (cost=0.00..404477.52 rows=15044952 width=16) (actual time=0.009..2911.419 rows=15015000 loops=1)
                                             Buffers: shared hit=226986 read=27042 dirtied=17
                                       ->  Hash  (cost=2061689.44..2061689.44 rows=4026581 width=4) (actual time=45514.054..45514.054 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=628664 read=439944 dirtied=1011 written=136
                                             ->  HashAggregate  (cost=1971091.37..2021423.63 rows=4026581 width=8) (actual time=39073.559..45510.506 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=628664 read=439944 dirtied=1011 written=136
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1670263.58 rows=60165558 width=8) (actual time=0.009..11483.902 rows=60045379 loops=1)
                                                         Buffers: shared hit=628664 read=439944 dirtied=1011 written=136
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1178.442..1178.442 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=2 read=35276 written=5835
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.014..692.039 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276 written=5835
 Planning time: 3.577 ms
 Execution time: 74049.336 ms
(42 rows)

COMMIT;
COMMIT