BEGIN;
BEGIN
create or replace view revenue15 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1994-02-01'
		and l_shipdate < date'1994-02-01' + 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,
	revenue15
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue15
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2379846.30..2384944.13 rows=3758 width=79) (actual time=40986.441..40986.443 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue15.supplier_no)
   Buffers: shared hit=276393 read=1050805 written=123
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1181262.13..1181262.14 rows=1 width=8) (actual time=18986.716..18986.716 rows=1 loops=1)
           Buffers: shared hit=249273 read=414213 written=123
           ->  HashAggregate  (cost=1181177.58..1181215.16 rows=3758 width=12) (actual time=18895.081..18970.423 rows=100000 loops=1)
                 Buffers: shared hit=249273 read=414213 written=123
                 ->  Bitmap Heap Scan on lineitem  (cost=48135.30..1158379.07 rows=2279851 width=12) (actual time=2183.273..14968.691 rows=2244961 loops=1)
                       Recheck Cond: ((l_shipdate >= '1994-02-01'::date) AND (l_shipdate < '1994-05-02 00:00:00'::timestamp without time zone))
                       Buffers: shared hit=249273 read=414213 written=123
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47565.34 rows=2279851 width=0) (actual time=1774.132..1774.132 rows=2265162 loops=1)
                             Index Cond: ((l_shipdate >= '1994-02-01'::date) AND (l_shipdate < '1994-05-02 00:00:00'::timestamp without time zone))
                             Buffers: shared hit=1 read=6130
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.092..9.394 rows=8001 loops=1)
         Buffers: shared hit=225
   ->  Sort  (cost=1198584.16..1198593.55 rows=3758 width=12) (actual time=40975.645..40975.646 rows=1 loops=1)
         Sort Key: revenue15.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=276168 read=1050805 written=123
         ->  Subquery Scan on revenue15  (cost=1198276.46..1198361.01 rows=3758 width=12) (actual time=40960.460..40975.601 rows=1 loops=1)
               Buffers: shared hit=276168 read=1050805 written=123
               ->  HashAggregate  (cost=1198276.46..1198323.43 rows=3758 width=12) (actual time=40960.458..40975.597 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=276168 read=1050805 written=123
                     ->  Bitmap Heap Scan on lineitem  (cost=48135.30..1158379.07 rows=2279851 width=12) (actual time=2476.669..17952.532 rows=2244961 loops=1)
                           Recheck Cond: ((l_shipdate >= '1994-02-01'::date) AND (l_shipdate < '1994-05-02 00:00:00'::timestamp without time zone))
                           Buffers: shared hit=26895 read=636592
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47565.34 rows=2279851 width=0) (actual time=1817.960..1817.960 rows=2265162 loops=1)
                                 Index Cond: ((l_shipdate >= '1994-02-01'::date) AND (l_shipdate < '1994-05-02 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=3 read=6129
 Total runtime: 41001.068 ms
(33 rows)

drop view revenue15;
DROP VIEW
COMMIT;
COMMIT