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) > 313
	)
	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=10203864.87..10203867.62 rows=100 width=39) (actual time=100020.915..100021.270 rows=99 loops=1)
   Buffers: shared hit=1598356 read=835317 dirtied=119 written=3469
   ->  GroupAggregate  (cost=10203864.87..11033615.41 rows=30172747 width=39) (actual time=100020.913..100021.257 rows=99 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1598356 read=835317 dirtied=119 written=3469
         ->  Sort  (cost=10203864.87..10279296.74 rows=30172747 width=39) (actual time=100020.893..100020.937 rows=693 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 79kB
               Buffers: shared hit=1598356 read=835317 dirtied=119 written=3469
               ->  Hash Join  (cost=2899055.88..5630354.96 rows=30172747 width=39) (actual time=76624.274..100019.421 rows=693 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1598344 read=835317 dirtied=119 written=3469
                     ->  Seq Scan on lineitem  (cost=0.00..1675252.94 rows=60345494 width=8) (actual time=0.055..12800.030 rows=60045826 loops=1)
                           Buffers: shared hit=825351 read=246447 written=8
                     ->  Hash  (cost=2804743.98..2804743.98 rows=7544952 width=39) (actual time=75961.698..75961.698 rows=99 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65543kB
                           Buffers: shared hit=772993 read=588870 dirtied=119 written=3461
                           ->  Hash Join  (cost=2188565.83..2804743.98 rows=7544952 width=39) (actual time=66466.956..75960.950 rows=99 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=772993 read=588870 dirtied=119 written=3461
                                 ->  Hash Join  (cost=2119537.83..2622541.70 rows=7544952 width=20) (actual time=65296.323..74784.355 rows=99 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=737716 read=588869 dirtied=119 written=3461
                                       ->  Seq Scan on orders  (cost=0.00..405686.04 rows=15089904 width=16) (actual time=0.011..4008.189 rows=15015000 loops=1)
                                             Buffers: shared hit=177850 read=76937 dirtied=118 written=3460
                                       ->  Hash  (cost=2068624.46..2068624.46 rows=4073069 width=4) (actual time=65091.893..65091.893 rows=99 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=559866 read=511932 dirtied=1 written=1
                                             ->  HashAggregate  (cost=1976980.41..2027893.77 rows=4073069 width=8) (actual time=57580.188..65091.157 rows=99 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 313::double precision)
                                                   Rows Removed by Filter: 15014901
                                                   Buffers: shared hit=559866 read=511932 dirtied=1 written=1
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1675252.94 rows=60345494 width=8) (actual time=0.038..14109.290 rows=60045826 loops=1)
                                                         Buffers: shared hit=559866 read=511932 dirtied=1 written=1
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1131.061..1131.061 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35277 read=1
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.021..602.910 rows=1500000 loops=1)
                                             Buffers: shared hit=35277 read=1
 Planning time: 4.248 ms
 Execution time: 100273.482 ms
(42 rows)

COMMIT;
COMMIT