BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	s_name,
	s_address
from
	supplier,
	nation
where
	s_suppkey in (
		select
			distinct (ps_suppkey)
		from
			partsupp,
			part
		where
			ps_partkey=p_partkey
			and p_name like 'dark%'
			and ps_availqty > (
				select
					0.5 * sum(l_quantity)
				from
					lineitem
				where
					l_partkey = ps_partkey
					and l_suppkey = ps_suppkey
					and l_shipdate >= '1993-01-01'
					and l_shipdate < cast(date '1993-01-01' + interval '1 year' as date)
			)
	)
	and s_nationkey = n_nationkey
	and n_name = 'INDONESIA'
order by
	s_name;
                                                                                            QUERY PLAN                                                                                             
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=10680847.41..10680850.08 rows=1066 width=51) (actual time=8234.379..8234.466 rows=1708 loops=1)
   Sort Key: supplier.s_name
   Sort Method: quicksort  Memory: 247kB
   Buffers: shared hit=2714017 read=362373 dirtied=1748
   ->  Hash Join  (cost=10680150.21..10680793.80 rows=1066 width=51) (actual time=8218.410..8232.577 rows=1708 loops=1)
         Hash Cond: (partsupp.ps_suppkey = supplier.s_suppkey)
         Buffers: shared hit=2714012 read=362373 dirtied=1748
         ->  HashAggregate  (cost=10677708.60..10677975.10 rows=26650 width=4) (actual time=8199.566..8208.465 rows=44388 loops=1)
               Group Key: partsupp.ps_suppkey
               Buffers: shared hit=2712171 read=362360 dirtied=1748
               ->  Nested Loop  (cost=0.86..10677641.97 rows=26650 width=4) (actual time=0.523..8151.888 rows=58438 loops=1)
                     Buffers: shared hit=2712171 read=362360 dirtied=1748
                     ->  Index Scan using pk_part on part  (cost=0.43..97473.43 rows=20019 width=4) (actual time=0.077..961.729 rows=21499 loops=1)
                           Filter: ((p_name)::text ~~ 'dark%'::text)
                           Rows Removed by Filter: 1978501
                           Buffers: shared hit=758 read=45983
                     ->  Index Scan using pk_partsupp on partsupp  (cost=0.43..528.50 rows=1 width=8) (actual time=0.270..0.333 rows=3 loops=21499)
                           Index Cond: (ps_partkey = part.p_partkey)
                           Filter: ((ps_availqty)::double precision > (SubPlan 1))
                           Rows Removed by Filter: 1
                           Buffers: shared hit=2711413 read=316377 dirtied=1748
                           SubPlan 1
                             ->  Aggregate  (cost=129.34..129.35 rows=1 width=4) (actual time=0.076..0.076 rows=1 loops=85996)
                                   Buffers: shared hit=2658305 read=280696 dirtied=1748
                                   ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.56..129.34 rows=1 width=4) (actual time=0.047..0.075 rows=1 loops=85996)
                                         Index Cond: (l_partkey = partsupp.ps_partkey)
                                         Filter: ((l_shipdate >= '1993-01-01'::date) AND (l_shipdate < '1994-01-01'::date) AND (l_suppkey = partsupp.ps_suppkey))
                                         Rows Removed by Filter: 29
                                         Buffers: shared hit=2658305 read=280696 dirtied=1748
         ->  Hash  (cost=2391.61..2391.61 rows=4000 width=55) (actual time=18.806..18.806 rows=3974 loops=1)
               Buckets: 4096  Batches: 1  Memory Usage: 380kB
               Buffers: shared hit=1841 read=13
               ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=55) (actual time=1.042..17.491 rows=3974 loops=1)
                     Buffers: shared hit=1841 read=13
                     ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.008..0.012 rows=1 loops=1)
                           Filter: (n_name = 'INDONESIA'::bpchar)
                           Rows Removed by Filter: 24
                           Buffers: shared hit=1
                     ->  Bitmap Heap Scan on supplier  (cost=79.29..2350.29 rows=4000 width=59) (actual time=1.027..16.608 rows=3974 loops=1)
                           Recheck Cond: (s_nationkey = nation.n_nationkey)
                           Heap Blocks: exact=1840
                           Buffers: shared hit=1840 read=13
                           ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.753..0.753 rows=3974 loops=1)
                                 Index Cond: (s_nationkey = nation.n_nationkey)
                                 Buffers: shared read=13
 Planning time: 4.160 ms
 Execution time: 8235.383 ms
(47 rows)

COMMIT;
COMMIT