BEGIN;
BEGIN
create or replace view revenue12 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1997-02-01'
		and l_shipdate < date'1997-02-01' + 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,
	revenue12
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue12
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2387071.64..2392169.68 rows=3772 width=79) (actual time=25184.658..25184.663 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue12.supplier_no)
   Buffers: shared hit=389147 read=946193
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1184838.96..1184838.97 rows=1 width=8) (actual time=11540.066..11540.066 rows=1 loops=1)
           Buffers: shared hit=199440 read=467210
           ->  HashAggregate  (cost=1184754.09..1184791.81 rows=3772 width=12) (actual time=11491.259..11530.393 rows=100000 loops=1)
                 Buffers: shared hit=199440 read=467210
                 ->  Bitmap Heap Scan on lineitem  (cost=48259.99..1161861.25 rows=2289284 width=12) (actual time=2266.377..8628.443 rows=2248474 loops=1)
                       Recheck Cond: ((l_shipdate >= '1997-02-01'::date) AND (l_shipdate < '1997-05-02 00:00:00'::timestamp without time zone))
                       Buffers: shared hit=199440 read=467210
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47687.67 rows=2289284 width=0) (actual time=1862.196..1862.196 rows=2277091 loops=1)
                             Index Cond: ((l_shipdate >= '1997-02-01'::date) AND (l_shipdate < '1997-05-02 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6144
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.125..27.316 rows=74945 loops=1)
         Buffers: shared hit=302 read=1737
   ->  Sort  (cost=1202232.67..1202242.10 rows=3772 width=12) (actual time=25150.394..25150.396 rows=1 loops=1)
         Sort Key: revenue12.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=388845 read=944456
         ->  Subquery Scan on revenue12  (cost=1201923.72..1202008.59 rows=3772 width=12) (actual time=25133.095..25150.350 rows=1 loops=1)
               Buffers: shared hit=388845 read=944456
               ->  HashAggregate  (cost=1201923.72..1201970.87 rows=3772 width=12) (actual time=25133.092..25150.344 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=388845 read=944456
                     ->  Bitmap Heap Scan on lineitem  (cost=48259.99..1161861.25 rows=2289284 width=12) (actual time=2044.223..10485.810 rows=2248474 loops=1)
                           Recheck Cond: ((l_shipdate >= '1997-02-01'::date) AND (l_shipdate < '1997-05-02 00:00:00'::timestamp without time zone))
                           Buffers: shared hit=189405 read=477246
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47687.67 rows=2289284 width=0) (actual time=1666.301..1666.301 rows=2277091 loops=1)
                                 Index Cond: ((l_shipdate >= '1997-02-01'::date) AND (l_shipdate < '1997-05-02 00:00:00'::timestamp without time zone))
                                 Buffers: shared read=6145
 Total runtime: 25205.359 ms
(33 rows)

drop view revenue12;
DROP VIEW
COMMIT;
COMMIT