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 = 'JAPAN'
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 = 'JAPAN'
		)
order by
	value desc;
                                                                                 QUERY PLAN                                                                                 
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=135989.33..136789.33 rows=320000 width=12) (actual time=32927.273..32928.492 rows=9218 loops=1)
   Sort Key: (sum((public.partsupp.ps_supplycost * (public.partsupp.ps_availqty)::double precision)))
   Sort Method: quicksort  Memory: 817kB
   Buffers: shared hit=430966 read=239982 written=2
   InitPlan 1 (returns $2)
     ->  Aggregate  (cost=49764.49..49764.50 rows=1 width=8) (actual time=12984.493..12984.493 rows=1 loops=1)
           Buffers: shared hit=245143 read=90329
           ->  Nested Loop  (cost=79.26..47364.49 rows=320000 width=8) (actual time=2.364..12818.884 rows=320720 loops=1)
                 Buffers: shared hit=245143 read=90329
                 ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=4) (actual time=2.303..90.439 rows=4009 loops=1)
                       Buffers: shared hit=1838 read=13
                       ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.013..0.021 rows=1 loops=1)
                             Filter: (n_name = 'JAPAN'::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=2.279..84.823 rows=4009 loops=1)
                             Recheck Cond: (s_nationkey = public.nation.n_nationkey)
                             Buffers: shared hit=1837 read=13
                             ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=1.963..1.963 rows=4009 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=0.203..3.136 rows=80 loops=4009)
                       Index Cond: (ps_suppkey = public.supplier.s_suppkey)
                       Buffers: shared hit=243305 read=90316
   ->  HashAggregate  (cost=52964.49..56964.49 rows=320000 width=12) (actual time=32788.466..32921.547 rows=9218 loops=1)
         Filter: (sum((public.partsupp.ps_supplycost * (public.partsupp.ps_availqty)::double precision)) > $2)
         Rows Removed by Filter: 292442
         Buffers: shared hit=430963 read=239982 written=2
         ->  Nested Loop  (cost=79.26..47364.49 rows=320000 width=12) (actual time=4.957..19107.957 rows=320720 loops=1)
               Buffers: shared hit=185820 read=149653 written=2
               ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=4) (actual time=4.862..112.101 rows=4009 loops=1)
                     Buffers: shared hit=1838 read=14
                     ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.025..0.038 rows=1 loops=1)
                           Filter: (n_name = 'JAPAN'::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=4.823..105.389 rows=4009 loops=1)
                           Recheck Cond: (s_nationkey = public.nation.n_nationkey)
                           Buffers: shared hit=1837 read=14
                           ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=4.454..4.454 rows=4009 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=0.234..4.692 rows=80 loops=4009)
                     Index Cond: (ps_suppkey = public.supplier.s_suppkey)
                     Buffers: shared hit=183982 read=149639 written=2
 Total runtime: 32936.894 ms
(46 rows)

COMMIT;
COMMIT