BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	ps_partkey,
	sum(ps_supplycost * ps_availqty) as value
from
	partsupp,
	supplier,
	nation
where
	ps_suppkey = s_suppkey
	and s_nationkey = n_nationkey
	and n_name = 'PERU'
group by
	ps_partkey having
		sum(ps_supplycost * ps_availqty) > (
			select
				sum(ps_supplycost * ps_availqty) * 0.0000100000
			from
				partsupp,
				supplier,
				nation
			where
				ps_suppkey = s_suppkey
				and s_nationkey = n_nationkey
				and n_name = 'PERU'
		)
order by
	value desc;
                                                                                 QUERY PLAN                                                                                 
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=135989.56..136789.56 rows=320000 width=12) (actual time=7647.407..7648.640 rows=9384 loops=1)
   Sort Key: (sum((public.partsupp.ps_supplycost * (public.partsupp.ps_availqty)::double precision)))
   Sort Method: quicksort  Memory: 824kB
   Buffers: shared hit=516332 read=151648
   InitPlan 1 (returns $2)
     ->  Aggregate  (cost=49764.61..49764.62 rows=1 width=8) (actual time=1944.731..1944.731 rows=1 loops=1)
           Buffers: shared hit=332873 read=1115
           ->  Nested Loop  (cost=79.26..47364.61 rows=320000 width=8) (actual time=2.837..1818.719 rows=319280 loops=1)
                 Buffers: shared hit=332873 read=1115
                 ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=4) (actual time=2.702..21.216 rows=3991 loops=1)
                       Buffers: shared hit=1842 read=14
                       ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.017..0.024 rows=1 loops=1)
                             Filter: (n_name = 'PERU'::bpchar)
                             Rows Removed by Filter: 24
                             Buffers: shared hit=1
                       ->  Bitmap Heap Scan on supplier  (cost=79.26..2350.26 rows=4000 width=8) (actual time=2.673..19.236 rows=3991 loops=1)
                             Recheck Cond: (s_nationkey = public.nation.n_nationkey)
                             Buffers: shared hit=1841 read=14
                             ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=2.251..2.251 rows=3991 loops=1)
                                   Index Cond: (s_nationkey = public.nation.n_nationkey)
                                   Buffers: shared read=13
                 ->  Index Scan using partsupp_ps_suppkey_idx on partsupp  (cost=0.00..10.44 rows=80 width=12) (actual time=0.025..0.418 rows=80 loops=3991)
                       Index Cond: (ps_suppkey = public.supplier.s_suppkey)
                       Buffers: shared hit=331031 read=1101
   ->  HashAggregate  (cost=52964.61..56964.61 rows=320000 width=12) (actual time=7496.704..7641.001 rows=9384 loops=1)
         Filter: (sum((public.partsupp.ps_supplycost * (public.partsupp.ps_availqty)::double precision)) > $2)
         Rows Removed by Filter: 291003
         Buffers: shared hit=516329 read=151648
         ->  Nested Loop  (cost=79.26..47364.61 rows=320000 width=12) (actual time=1.291..4972.855 rows=319280 loops=1)
               Buffers: shared hit=183456 read=150533
               ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=4) (actual time=1.265..57.144 rows=3991 loops=1)
                     Buffers: shared hit=496 read=1361
                     ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.027..0.043 rows=1 loops=1)
                           Filter: (n_name = 'PERU'::bpchar)
                           Rows Removed by Filter: 24
                           Buffers: shared hit=1
                     ->  Bitmap Heap Scan on supplier  (cost=79.26..2350.26 rows=4000 width=8) (actual time=1.232..54.196 rows=3991 loops=1)
                           Recheck Cond: (s_nationkey = public.nation.n_nationkey)
                           Buffers: shared hit=495 read=1361
                           ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=0.930..0.930 rows=3991 loops=1)
                                 Index Cond: (s_nationkey = public.nation.n_nationkey)
                                 Buffers: shared read=14
               ->  Index Scan using partsupp_ps_suppkey_idx on partsupp  (cost=0.00..10.44 rows=80 width=16) (actual time=0.052..1.193 rows=80 loops=3991)
                     Index Cond: (ps_suppkey = public.supplier.s_suppkey)
                     Buffers: shared hit=182960 read=149172
 Total runtime: 7655.680 ms
(46 rows)

COMMIT;
COMMIT