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 = 'ETHIOPIA'
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 = 'ETHIOPIA'
		)
order by
	value desc;
                                                                                 QUERY PLAN                                                                                 
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=130429.93..131229.93 rows=320000 width=12) (actual time=3418.906..3420.193 rows=9940 loops=1)
   Sort Key: (sum((partsupp.ps_supplycost * (partsupp.ps_availqty)::double precision)))
   Sort Method: quicksort  Memory: 850kB
   Buffers: shared hit=586932 read=73373 written=157
   InitPlan 1 (returns $2)
     ->  Aggregate  (cost=46984.79..46984.80 rows=1 width=8) (actual time=932.344..932.344 rows=1 loops=1)
           Buffers: shared hit=320915 read=9236 written=2
           ->  Nested Loop  (cost=79.73..44584.79 rows=320000 width=8) (actual time=1.252..874.226 rows=315600 loops=1)
                 Buffers: shared hit=320915 read=9236 written=2
                 ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=4) (actual time=1.232..8.248 rows=3945 loops=1)
                       Buffers: shared hit=1843 read=13
                       ->  Seq Scan on nation nation_1  (cost=0.00..1.31 rows=1 width=4) (actual time=0.007..0.017 rows=1 loops=1)
                             Filter: (n_name = 'ETHIOPIA'::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=1.217..7.368 rows=3945 loops=1)
                             Recheck Cond: (s_nationkey = nation_1.n_nationkey)
                             Heap Blocks: exact=1842
                             Buffers: shared hit=1842 read=13
                             ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.923..0.923 rows=3945 loops=1)
                                   Index Cond: (s_nationkey = nation_1.n_nationkey)
                                   Buffers: shared read=13
                 ->  Index Scan using partsupp_ps_suppkey_idx on partsupp partsupp_1  (cost=0.43..9.75 rows=80 width=12) (actual time=0.019..0.204 rows=80 loops=3945)
                       Index Cond: (ps_suppkey = supplier_1.s_suppkey)
                       Buffers: shared hit=319072 read=9223 written=2
   ->  HashAggregate  (cost=50184.79..54184.79 rows=320000 width=12) (actual time=3328.118..3412.816 rows=9940 loops=1)
         Group Key: partsupp.ps_partkey
         Filter: (sum((partsupp.ps_supplycost * (partsupp.ps_availqty)::double precision)) > $2)
         Rows Removed by Filter: 287594
         Buffers: shared hit=586929 read=73373 written=157
         ->  Nested Loop  (cost=79.73..44584.79 rows=320000 width=12) (actual time=1.369..2151.641 rows=315600 loops=1)
               Buffers: shared hit=266014 read=64137 written=155
               ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=4) (actual time=1.329..15.271 rows=3945 loops=1)
                     Buffers: shared hit=1843 read=13
                     ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.012..0.024 rows=1 loops=1)
                           Filter: (n_name = 'ETHIOPIA'::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=1.307..14.133 rows=3945 loops=1)
                           Recheck Cond: (s_nationkey = nation.n_nationkey)
                           Heap Blocks: exact=1842
                           Buffers: shared hit=1842 read=13
                           ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=1.002..1.002 rows=3945 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=0.026..0.521 rows=80 loops=3945)
                     Index Cond: (ps_suppkey = supplier.s_suppkey)
                     Buffers: shared hit=264171 read=64124 written=155
 Planning time: 3.771 ms
 Execution time: 3428.630 ms
(50 rows)

COMMIT;
COMMIT