BEGIN;
BEGIN
create or replace view revenue9 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1993-04-01'
		and l_shipdate < date'1993-04-01' + interval '90 days'
	group by
		l_suppkey;
CREATE VIEW
EXPLAIN (ANALYZE, BUFFERS)
select
	s_suppkey,
	s_name,
	s_address,
	s_phone,
	total_revenue
from
	supplier,
	revenue9
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue9
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2373269.64..2378367.56 rows=3764 width=79) (actual time=48564.037..48564.039 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue9.supplier_no)
   Buffers: shared hit=465738 read=861003 written=22533
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1177986.55..1177986.56 rows=1 width=8) (actual time=23554.196..23554.196 rows=1 loops=1)
           Buffers: shared hit=239225 read=423894 written=22457
           ->  HashAggregate  (cost=1177901.86..1177939.50 rows=3764 width=12) (actual time=23494.327..23542.907 rows=100000 loops=1)
                 Buffers: shared hit=239225 read=423894 written=22457
                 ->  Bitmap Heap Scan on lineitem  (cost=48135.91..1155137.88 rows=2276398 width=12) (actual time=2562.455..19063.328 rows=2250107 loops=1)
                       Recheck Cond: ((l_shipdate >= '1993-04-01'::date) AND (l_shipdate < '1993-06-30 00:00:00'::timestamp without time zone))
                       Buffers: shared hit=239225 read=423894 written=22457
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47566.81 rows=2276398 width=0) (actual time=2049.491..2049.491 rows=2263738 loops=1)
                             Index Cond: ((l_shipdate >= '1993-04-01'::date) AND (l_shipdate < '1993-06-30 00:00:00'::timestamp without time zone))
                             Buffers: shared hit=304 read=5841
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.070..8.414 rows=17858 loops=1)
         Buffers: shared hit=502
   ->  Sort  (cost=1195283.08..1195292.49 rows=3764 width=12) (actual time=48553.689..48553.689 rows=1 loops=1)
         Sort Key: revenue9.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=465236 read=861003 written=22533
         ->  Subquery Scan on revenue9  (cost=1194974.84..1195059.53 rows=3764 width=12) (actual time=48547.059..48553.655 rows=1 loops=1)
               Buffers: shared hit=465236 read=861003 written=22533
               ->  HashAggregate  (cost=1194974.84..1195021.89 rows=3764 width=12) (actual time=48547.057..48553.651 rows=1 loops=1)
                     Filter: (sum((public.lineitem.l_extendedprice * (1::double precision - public.lineitem.l_discount))) = $0)
                     Rows Removed by Filter: 99999
                     Buffers: shared hit=465236 read=861003 written=22533
                     ->  Bitmap Heap Scan on lineitem  (cost=48135.91..1155137.88 rows=2276398 width=12) (actual time=2446.625..20798.087 rows=2250107 loops=1)
                           Recheck Cond: ((l_shipdate >= '1993-04-01'::date) AND (l_shipdate < '1993-06-30 00:00:00'::timestamp without time zone))
                           Buffers: shared hit=226011 read=437109 written=76
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47566.81 rows=2276398 width=0) (actual time=2084.897..2084.897 rows=2263423 loops=1)
                                 Index Cond: ((l_shipdate >= '1993-04-01'::date) AND (l_shipdate < '1993-06-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared read=6146
 Total runtime: 48575.578 ms
(33 rows)

drop view revenue9;
DROP VIEW
COMMIT;
COMMIT