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 = 'ALGERIA'
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 = 'ALGERIA'
		)
order by
	value desc;
                                                                                 QUERY PLAN                                                                                 
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=135989.33..136789.33 rows=320000 width=12) (actual time=15065.562..15066.831 rows=10130 loops=1)
   Sort Key: (sum((public.partsupp.ps_supplycost * (public.partsupp.ps_availqty)::double precision)))
   Sort Method: quicksort  Memory: 859kB
   Buffers: shared hit=655474 read=3098 written=31
   InitPlan 1 (returns $2)
     ->  Aggregate  (cost=49764.49..49764.50 rows=1 width=8) (actual time=6439.980..6439.981 rows=1 loops=1)
           Buffers: shared hit=329267 read=17 written=3
           ->  Nested Loop  (cost=79.26..47364.49 rows=320000 width=8) (actual time=5.825..6309.673 rows=314720 loops=1)
                 Buffers: shared hit=329267 read=17 written=3
                 ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=4) (actual time=2.412..79.083 rows=3934 loops=1)
                       Buffers: shared hit=1858
                       ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.009..0.020 rows=1 loops=1)
                             Filter: (n_name = 'ALGERIA'::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=2.392..75.910 rows=3934 loops=1)
                             Recheck Cond: (s_nationkey = public.nation.n_nationkey)
                             Buffers: shared hit=1857
                             ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=1.626..1.626 rows=3934 loops=1)
                                   Index Cond: (s_nationkey = public.nation.n_nationkey)
                                   Buffers: shared hit=12
                 ->  Index Scan using partsupp_ps_suppkey_idx on partsupp  (cost=0.00..10.44 rows=80 width=12) (actual time=0.092..1.554 rows=80 loops=3934)
                       Index Cond: (ps_suppkey = public.supplier.s_suppkey)
                       Buffers: shared hit=327409 read=17 written=3
   ->  HashAggregate  (cost=52964.49..56964.49 rows=320000 width=12) (actual time=14911.651..15059.080 rows=10130 loops=1)
         Filter: (sum((public.partsupp.ps_supplycost * (public.partsupp.ps_availqty)::double precision)) > $2)
         Rows Removed by Filter: 286590
         Buffers: shared hit=655471 read=3098 written=31
         ->  Nested Loop  (cost=79.26..47364.49 rows=320000 width=12) (actual time=4.071..7399.039 rows=314720 loops=1)
               Buffers: shared hit=326204 read=3081 written=28
               ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=4) (actual time=3.964..86.205 rows=3934 loops=1)
                     Buffers: shared hit=1846 read=13
                     ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.017..0.033 rows=1 loops=1)
                           Filter: (n_name = 'ALGERIA'::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=3.932..82.311 rows=3934 loops=1)
                           Recheck Cond: (s_nationkey = public.nation.n_nationkey)
                           Buffers: shared hit=1845 read=13
                           ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=3.498..3.498 rows=3934 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=16) (actual time=0.144..1.821 rows=80 loops=3934)
                     Index Cond: (ps_suppkey = public.supplier.s_suppkey)
                     Buffers: shared hit=324358 read=3068 written=28
 Total runtime: 15078.025 ms
(46 rows)

COMMIT;
COMMIT