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=10153362.97..10153365.72 rows=100 width=39) (actual time=83545.039..83545.258 rows=75 loops=1)
   Buffers: shared hit=1665964 read=755798 dirtied=320 written=2
   ->  GroupAggregate  (cost=10153362.97..10978992.61 rows=30022896 width=39) (actual time=83545.036..83545.250 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1665964 read=755798 dirtied=320 written=2
         ->  Sort  (cost=10153362.97..10228420.21 rows=30022896 width=39) (actual time=83545.015..83545.047 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=1665964 read=755798 dirtied=320 written=2
               ->  Hash Join  (cost=2885912.06..5603646.36 rows=30022896 width=39) (actual time=64739.962..83543.529 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1665952 read=755798 dirtied=320 written=2
                     ->  Seq Scan on lineitem  (cost=0.00..1666932.93 rows=60045793 width=8) (actual time=0.019..12033.850 rows=60045669 loops=1)
                           Buffers: shared hit=740171 read=326304
                     ->  Hash  (cost=2792068.41..2792068.41 rows=7507492 width=39) (actual time=64306.535..64306.535 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=925781 read=429494 dirtied=320 written=2
                           ->  Hash Join  (cost=2178747.31..2792068.41 rows=7507492 width=39) (actual time=54634.284..64306.101 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=925781 read=429494 dirtied=320 written=2
                                 ->  Hash Join  (cost=2109719.31..2610428.03 rows=7507492 width=20) (actual time=53569.038..63240.532 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=925779 read=394218 dirtied=320 written=2
                                       ->  Seq Scan on orders  (cost=0.00..403671.84 rows=15014984 width=16) (actual time=0.008..4246.623 rows=15015000 loops=1)
                                             Buffers: shared hit=1190 read=252332 dirtied=254
                                       ->  Hash  (cost=2058805.95..2058805.95 rows=4073069 width=4) (actual time=53347.255..53347.255 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=924589 read=141886 dirtied=66 written=2
                                             ->  HashAggregate  (cost=1967161.90..2018075.26 rows=4073069 width=8) (actual time=44147.421..53346.555 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=924589 read=141886 dirtied=66 written=2
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1666932.93 rows=60045793 width=8) (actual time=0.007..14064.607 rows=60045669 loops=1)
                                                         Buffers: shared hit=924589 read=141886 dirtied=66 written=2
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1053.368..1053.368 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=2 read=35276
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.012..633.225 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276
 Planning time: 7.374 ms
 Execution time: 83836.453 ms
(42 rows)

COMMIT;
COMMIT