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=10404591.11..10404593.86 rows=100 width=39) (actual time=224824.127..224824.569 rows=75 loops=1)
   Buffers: shared hit=1333659 read=1107133 written=4
   ->  GroupAggregate  (cost=10404591.11..11236790.01 rows=30261778 width=39) (actual time=224824.124..224824.554 rows=75 loops=1)
         Buffers: shared hit=1333659 read=1107133 written=4
         ->  Sort  (cost=10404591.11..10480245.56 rows=30261778 width=39) (actual time=224824.099..224824.180 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=1333659 read=1107133 written=4
               ->  Hash Join  (cost=3077567.55..5816941.38 rows=30261778 width=39) (actual time=150138.122..224820.156 rows=525 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1333645 read=1107133 written=4
                     ->  Seq Scan on lineitem  (cost=0.00..1680211.57 rows=60523557 width=8) (actual time=0.072..59178.296 rows=60044082 loops=1)
                           Buffers: shared hit=396477 read=678499 written=1
                     ->  Hash  (cost=2982973.95..2982973.95 rows=7567488 width=39) (actual time=149858.124..149858.124 rows=75 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=937168 read=428634 written=3
                           ->  Hash Join  (cost=2194721.06..2982973.95 rows=7567488 width=39) (actual time=131365.526..149857.563 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=937168 read=428634 written=3
                                 ->  Hash Join  (cost=2125693.06..2762596.19 rows=7567488 width=20) (actual time=128789.894..147280.334 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=901993 read=428531 written=3
                                       ->  Seq Scan on orders  (cost=0.00..406897.75 rows=15134975 width=16) (actual time=0.012..12284.659 rows=15015000 loops=1)
                                             Buffers: shared hit=245906 read=9642 written=3
                                       ->  Hash  (cost=2074670.31..2074670.31 rows=4081820 width=4) (actual time=128372.483..128372.483 rows=75 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=656087 read=418889
                                             ->  HashAggregate  (cost=1982829.36..2033852.11 rows=4081820 width=8) (actual time=118835.220..128371.626 rows=75 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 15014925
                                                   Buffers: shared hit=656087 read=418889
                                                   ->  Seq Scan on lineitem  (cost=0.00..1680211.57 rows=60523557 width=8) (actual time=0.009..65264.744 rows=60044082 loops=1)
                                                         Buffers: shared hit=656087 read=418889
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=2574.000..2574.000 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35175 read=103
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.013..1724.613 rows=1500000 loops=1)
                                             Buffers: shared hit=35175 read=103
 Total runtime: 225127.001 ms
(39 rows)

COMMIT;
COMMIT