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) > 314
	)
	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=10252677.61..10252680.36 rows=100 width=39) (actual time=81291.454..81291.727 rows=85 loops=1)
   Buffers: shared hit=1624262 read=821766 dirtied=578 written=2771
   ->  GroupAggregate  (cost=10252677.61..11086718.68 rows=30328766 width=39) (actual time=81291.450..81291.715 rows=85 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1624262 read=821766 dirtied=578 written=2771
         ->  Sort  (cost=10252677.61..10328499.53 rows=30328766 width=39) (actual time=81291.437..81291.480 rows=595 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 71kB
               Buffers: shared hit=1624262 read=821766 dirtied=578 written=2771
               ->  Hash Join  (cost=2908965.87..5654390.04 rows=30328766 width=39) (actual time=61319.253..81290.398 rows=595 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1624250 read=821766 dirtied=578 written=2771
                     ->  Seq Scan on lineitem  (cost=0.00..1683917.33 rows=60657533 width=8) (actual time=0.046..12350.231 rows=59984826 loops=1)
                           Buffers: shared hit=656443 read=420899
                     ->  Hash  (cost=2814184.97..2814184.97 rows=7582472 width=39) (actual time=60761.817..60761.817 rows=85 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=967807 read=400867 dirtied=578 written=2771
                           ->  Hash Join  (cost=2195955.27..2814184.97 rows=7582472 width=39) (actual time=51651.227..60761.539 rows=85 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=967807 read=400867 dirtied=578 written=2771
                                 ->  Hash Join  (cost=2126927.27..2631419.89 rows=7582472 width=20) (actual time=50576.488..59686.532 rows=85 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=932748 read=400648 dirtied=578 written=2766
                                       ->  Seq Scan on orders  (cost=0.00..407703.43 rows=15164943 width=16) (actual time=0.010..3500.485 rows=15000000 loops=1)
                                             Buffers: shared hit=220176 read=35878 written=2539
                                       ->  Hash  (cost=2077026.46..2077026.46 rows=3992065 width=4) (actual time=50419.934..50419.934 rows=85 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=712572 read=364770 dirtied=578 written=227
                                             ->  HashAggregate  (cost=1987205.00..2037105.81 rows=3992065 width=8) (actual time=44287.243..50419.619 rows=85 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 314::double precision)
                                                   Rows Removed by Filter: 14999915
                                                   Buffers: shared hit=712572 read=364770 dirtied=578 written=227
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1683917.33 rows=60657533 width=8) (actual time=0.012..13955.358 rows=59984826 loops=1)
                                                         Buffers: shared hit=712572 read=364770 dirtied=578 written=227
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1059.910..1059.910 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35059 read=219 written=5
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.017..541.530 rows=1500000 loops=1)
                                             Buffers: shared hit=35059 read=219 written=5
 Planning time: 5.032 ms
 Execution time: 81447.813 ms
(42 rows)

COMMIT;
COMMIT