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=130429.17..131229.17 rows=320000 width=12) (actual time=4338.108..4339.338 rows=9940 loops=1)
   Sort Key: (sum((partsupp.ps_supplycost * (partsupp.ps_availqty)::double precision)))
   Sort Method: quicksort  Memory: 850kB
   Buffers: shared hit=487561 read=172744 written=31
   InitPlan 1 (returns $2)
     ->  Aggregate  (cost=46984.41..46984.42 rows=1 width=8) (actual time=1627.034..1627.035 rows=1 loops=1)
           Buffers: shared hit=263509 read=66642 written=21
           ->  Nested Loop  (cost=79.73..44584.41 rows=320000 width=8) (actual time=1.162..1563.363 rows=315600 loops=1)
                 Buffers: shared hit=263509 read=66642 written=21
                 ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=4) (actual time=1.144..8.640 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=1.132..7.603 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=0.851..0.851 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=0.023..0.376 rows=80 loops=3945)
                       Index Cond: (ps_suppkey = supplier_1.s_suppkey)
                       Buffers: shared hit=261666 read=66629 written=21
   ->  HashAggregate  (cost=50184.41..54184.41 rows=320000 width=12) (actual time=4251.067..4332.326 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=487558 read=172744 written=31
         ->  Nested Loop  (cost=79.73..44584.41 rows=320000 width=12) (actual time=1.344..2386.048 rows=315600 loops=1)
               Buffers: shared hit=224049 read=106102 written=10
               ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=4) (actual time=1.312..15.163 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..0.022 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=1.292..14.045 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=0.998..0.998 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..0.579 rows=80 loops=3945)
                     Index Cond: (ps_suppkey = supplier.s_suppkey)
                     Buffers: shared hit=222206 read=106089 written=10
 Planning time: 3.070 ms
 Execution time: 4347.143 ms
(50 rows)

COMMIT;
COMMIT