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=135946.47..136745.68 rows=319684 width=12) (actual time=2869.118..2870.195 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=507691 read=150881
   InitPlan 1 (returns $2)
     ->  Aggregate  (cost=49762.20..49762.21 rows=1 width=8) (actual time=620.102..620.103 rows=1 loops=1)
           Buffers: shared hit=329284
           ->  Nested Loop  (cost=79.26..47364.57 rows=319684 width=8) (actual time=0.932..568.946 rows=314720 loops=1)
                 Buffers: shared hit=329284
                 ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=4) (actual time=0.911..6.287 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..0.025 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=0.893..5.587 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=0.627..0.627 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=0.008..0.130 rows=80 loops=3934)
                       Index Cond: (ps_suppkey = public.supplier.s_suppkey)
                       Buffers: shared hit=327426
   ->  HashAggregate  (cost=52959.04..56955.09 rows=319684 width=12) (actual time=2785.535..2863.674 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=507688 read=150881
         ->  Nested Loop  (cost=79.26..47364.57 rows=319684 width=12) (actual time=1.832..1909.983 rows=314720 loops=1)
               Buffers: shared hit=178404 read=150881
               ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=4) (actual time=1.792..25.278 rows=3934 loops=1)
                     Buffers: shared hit=3 read=1856
                     ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.018..0.032 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=1.764..24.177 rows=3934 loops=1)
                           Recheck Cond: (s_nationkey = public.nation.n_nationkey)
                           Buffers: shared hit=2 read=1856
                           ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=1.447..1.447 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=0.020..0.462 rows=80 loops=3934)
                     Index Cond: (ps_suppkey = public.supplier.s_suppkey)
                     Buffers: shared hit=178401 read=149025
 Total runtime: 2878.932 ms
(46 rows)

COMMIT;
COMMIT