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=130415.98..131215.73 rows=319898 width=12) (actual time=3975.071..3976.261 rows=9940 loops=1)
   Sort Key: (sum((partsupp.ps_supplycost * (partsupp.ps_availqty)::double precision)))
   Sort Method: quicksort  Memory: 850kB
   Buffers: shared hit=444968 read=215337 written=329
   InitPlan 1 (returns $2)
     ->  Aggregate  (cost=46983.99..46984.01 rows=1 width=8) (actual time=1100.460..1100.461 rows=1 loops=1)
           Buffers: shared hit=279276 read=50875 written=37
           ->  Nested Loop  (cost=79.73..44584.76 rows=319898 width=8) (actual time=1.054..1039.847 rows=315600 loops=1)
                 Buffers: shared hit=279276 read=50875 written=37
                 ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=4) (actual time=1.042..6.961 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=0.008..0.015 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=1.027..6.069 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=0.754..0.754 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=0.015..0.246 rows=80 loops=3945)
                       Index Cond: (ps_suppkey = supplier_1.s_suppkey)
                       Buffers: shared hit=277433 read=50862 written=37
   ->  HashAggregate  (cost=50182.97..54181.70 rows=319898 width=12) (actual time=3888.539..3969.378 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=444965 read=215337 written=329
         ->  Nested Loop  (cost=79.73..44584.76 rows=319898 width=12) (actual time=1.241..2532.829 rows=315600 loops=1)
               Buffers: shared hit=165689 read=164462 written=292
               ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=4) (actual time=1.199..12.927 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=0.013..0.020 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=1.178..11.723 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=0.861..0.861 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=0.025..0.616 rows=80 loops=3945)
                     Index Cond: (ps_suppkey = supplier.s_suppkey)
                     Buffers: shared hit=163846 read=164449 written=292
 Planning time: 3.413 ms
 Execution time: 3984.713 ms
(50 rows)

COMMIT;
COMMIT