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 = 'IRAN'
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 = 'IRAN'
		)
order by
	value desc;
                                                                                 QUERY PLAN                                                                                 
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=130429.17..131229.17 rows=320000 width=12) (actual time=2215.524..2216.434 rows=9181 loops=1)
   Sort Key: (sum((partsupp.ps_supplycost * (partsupp.ps_availqty)::double precision)))
   Sort Method: quicksort  Memory: 815kB
   Buffers: shared hit=622681 read=50616
   InitPlan 1 (returns $2)
     ->  Aggregate  (cost=46984.41..46984.42 rows=1 width=8) (actual time=547.497..547.498 rows=1 loops=1)
           Buffers: shared hit=336647
           ->  Nested Loop  (cost=79.73..44584.41 rows=320000 width=8) (actual time=0.876..489.552 rows=321840 loops=1)
                 Buffers: shared hit=336647
                 ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=4) (actual time=0.862..5.813 rows=4023 loops=1)
                       Buffers: shared hit=1868
                       ->  Seq Scan on nation nation_1  (cost=0.00..1.31 rows=1 width=4) (actual time=0.007..0.018 rows=1 loops=1)
                             Filter: (n_name = 'IRAN'::bpchar)
                             Rows Removed by Filter: 24
                             Buffers: shared hit=1
                       ->  Bitmap Heap Scan on supplier supplier_1  (cost=79.29..2350.29 rows=4000 width=8) (actual time=0.848..5.082 rows=4023 loops=1)
                             Recheck Cond: (s_nationkey = nation_1.n_nationkey)
                             Heap Blocks: exact=1854
                             Buffers: shared hit=1867
                             ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.583..0.583 rows=4023 loops=1)
                                   Index Cond: (s_nationkey = nation_1.n_nationkey)
                                   Buffers: shared hit=13
                 ->  Index Scan using partsupp_ps_suppkey_idx on partsupp partsupp_1  (cost=0.43..9.75 rows=80 width=12) (actual time=0.007..0.107 rows=80 loops=4023)
                       Index Cond: (ps_suppkey = supplier_1.s_suppkey)
                       Buffers: shared hit=334779
   ->  HashAggregate  (cost=50184.41..54184.41 rows=320000 width=12) (actual time=2114.139..2210.718 rows=9181 loops=1)
         Group Key: partsupp.ps_partkey
         Filter: (sum((partsupp.ps_supplycost * (partsupp.ps_availqty)::double precision)) > $2)
         Rows Removed by Filter: 293844
         Buffers: shared hit=622678 read=50616
         ->  Nested Loop  (cost=79.73..44584.41 rows=320000 width=12) (actual time=2.124..1351.867 rows=321840 loops=1)
               Buffers: shared hit=286031 read=50616
               ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=4) (actual time=2.059..26.453 rows=4023 loops=1)
                     Buffers: shared hit=24 read=1844
                     ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.019..0.030 rows=1 loops=1)
                           Filter: (n_name = 'IRAN'::bpchar)
                           Rows Removed by Filter: 24
                           Buffers: shared hit=1
                     ->  Bitmap Heap Scan on supplier  (cost=79.29..2350.29 rows=4000 width=8) (actual time=2.025..25.218 rows=4023 loops=1)
                           Recheck Cond: (s_nationkey = nation.n_nationkey)
                           Heap Blocks: exact=1854
                           Buffers: shared hit=23 read=1844
                           ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=1.456..1.456 rows=4023 loops=1)
                                 Index Cond: (s_nationkey = nation.n_nationkey)
                                 Buffers: shared read=13
               ->  Index Scan using partsupp_ps_suppkey_idx on partsupp  (cost=0.43..9.75 rows=80 width=16) (actual time=0.020..0.311 rows=80 loops=4023)
                     Index Cond: (ps_suppkey = supplier.s_suppkey)
                     Buffers: shared hit=286007 read=48772
 Planning time: 5.361 ms
 Execution time: 2222.870 ms
(50 rows)

COMMIT;
COMMIT