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=135989.60..136789.60 rows=320000 width=12) (actual time=7723.269..7724.460 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=511000 read=147572 written=12169
   InitPlan 1 (returns $2)
     ->  Aggregate  (cost=49764.62..49764.64 rows=1 width=8) (actual time=1601.517..1601.518 rows=1 loops=1)
           Buffers: shared hit=321830 read=7454 written=681
           ->  Nested Loop  (cost=79.26..47364.62 rows=320000 width=8) (actual time=1.207..1485.403 rows=314720 loops=1)
                 Buffers: shared hit=321830 read=7454 written=681
                 ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=4) (actual time=1.176..15.813 rows=3934 loops=1)
                       Buffers: shared hit=1846 read=12
                       ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.007..0.019 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=1.161..14.031 rows=3934 loops=1)
                             Recheck Cond: (s_nationkey = public.nation.n_nationkey)
                             Buffers: shared hit=1845 read=12
                             ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=0.862..0.862 rows=3934 loops=1)
                                   Index Cond: (s_nationkey = public.nation.n_nationkey)
                                   Buffers: shared read=12
                 ->  Index Scan using partsupp_ps_suppkey_idx on partsupp  (cost=0.00..10.44 rows=80 width=12) (actual time=0.021..0.347 rows=80 loops=3934)
                       Index Cond: (ps_suppkey = public.supplier.s_suppkey)
                       Buffers: shared hit=319984 read=7442 written=681
   ->  HashAggregate  (cost=52964.62..56964.62 rows=320000 width=12) (actual time=7584.057..7716.312 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=510997 read=147572 written=12169
         ->  Nested Loop  (cost=79.26..47364.62 rows=320000 width=12) (actual time=1.527..4870.748 rows=314720 loops=1)
               Buffers: shared hit=189167 read=140118 written=11488
               ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=4) (actual time=1.430..30.363 rows=3934 loops=1)
                     Buffers: shared hit=1846 read=13 written=1
                     ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.017..0.031 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=1.404..27.739 rows=3934 loops=1)
                           Recheck Cond: (s_nationkey = public.nation.n_nationkey)
                           Buffers: shared hit=1845 read=13 written=1
                           ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=1.054..1.054 rows=3934 loops=1)
                                 Index Cond: (s_nationkey = public.nation.n_nationkey)
                                 Buffers: shared read=13 written=1
               ->  Index Scan using partsupp_ps_suppkey_idx on partsupp  (cost=0.00..10.44 rows=80 width=16) (actual time=0.049..1.195 rows=80 loops=3934)
                     Index Cond: (ps_suppkey = public.supplier.s_suppkey)
                     Buffers: shared hit=187321 read=140105 written=11487
 Total runtime: 7735.364 ms
(46 rows)

COMMIT;
COMMIT