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 = 'IRAQ'
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 = 'IRAQ'
		)
order by
	value desc;
                                                                                 QUERY PLAN                                                                                 
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=135982.89..136782.77 rows=319952 width=12) (actual time=12843.477..12844.631 rows=8406 loops=1)
   Sort Key: (sum((public.partsupp.ps_supplycost * (public.partsupp.ps_availqty)::double precision)))
   Sort Method: quicksort  Memory: 779kB
   Buffers: shared hit=589049 read=96365 written=12755
   InitPlan 1 (returns $2)
     ->  Aggregate  (cost=49764.18..49764.19 rows=1 width=8) (actual time=4523.569..4523.569 rows=1 loops=1)
           Buffers: shared hit=334964 read=7741 written=58
           ->  Nested Loop  (cost=79.26..47364.54 rows=319952 width=8) (actual time=2.041..4376.552 rows=327600 loops=1)
                 Buffers: shared hit=334964 read=7741 written=58
                 ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=4) (actual time=1.994..46.267 rows=4095 loops=1)
                       Buffers: shared hit=1837 read=13 written=1
                       ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.013..0.024 rows=1 loops=1)
                             Filter: (n_name = 'IRAQ'::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=1.967..43.281 rows=4095 loops=1)
                             Recheck Cond: (s_nationkey = public.nation.n_nationkey)
                             Buffers: shared hit=1836 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=1.569..1.569 rows=4095 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=12) (actual time=0.059..1.026 rows=80 loops=4095)
                       Index Cond: (ps_suppkey = public.supplier.s_suppkey)
                       Buffers: shared hit=333127 read=7728 written=57
   ->  HashAggregate  (cost=52963.70..56963.10 rows=319952 width=12) (actual time=12695.280..12837.914 rows=8406 loops=1)
         Filter: (sum((public.partsupp.ps_supplycost * (public.partsupp.ps_availqty)::double precision)) > $2)
         Rows Removed by Filter: 299658
         Buffers: shared hit=589046 read=96365 written=12755
         ->  Nested Loop  (cost=79.26..47364.54 rows=319952 width=12) (actual time=2.426..7514.736 rows=327600 loops=1)
               Buffers: shared hit=254082 read=88624 written=12697
               ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=4) (actual time=2.383..56.166 rows=4095 loops=1)
                     Buffers: shared hit=1837 read=14 written=2
                     ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.022..0.037 rows=1 loops=1)
                           Filter: (n_name = 'IRAQ'::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=2.347..51.718 rows=4095 loops=1)
                           Recheck Cond: (s_nationkey = public.nation.n_nationkey)
                           Buffers: shared hit=1836 read=14 written=2
                           ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=1.949..1.949 rows=4095 loops=1)
                                 Index Cond: (s_nationkey = public.nation.n_nationkey)
                                 Buffers: shared read=14 written=2
               ->  Index Scan using partsupp_ps_suppkey_idx on partsupp  (cost=0.00..10.44 rows=80 width=16) (actual time=0.080..1.781 rows=80 loops=4095)
                     Index Cond: (ps_suppkey = public.supplier.s_suppkey)
                     Buffers: shared hit=252245 read=88610 written=12695
 Total runtime: 12859.391 ms
(46 rows)

COMMIT;
COMMIT