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 >= '1994-10-01'
		and l_shipdate < date'1994-10-01' + 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=2391584.44..2396682.36 rows=3764 width=79) (actual time=31778.119..31778.124 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue12.supplier_no)
   Buffers: shared hit=555116 read=781086
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1187081.70..1187081.71 rows=1 width=8) (actual time=14153.109..14153.109 rows=1 loops=1)
           Buffers: shared hit=249126 read=418777
           ->  HashAggregate  (cost=1186997.01..1187034.65 rows=3764 width=12) (actual time=14077.220..14142.206 rows=100000 loops=1)
                 Buffers: shared hit=249126 read=418777
                 ->  Bitmap Heap Scan on lineitem  (cost=48290.06..1164067.03 rows=2292998 width=12) (actual time=2005.737..10564.891 rows=2243588 loops=1)
                       Recheck Cond: ((l_shipdate >= '1994-10-01'::date) AND (l_shipdate < '1994-12-30 00:00:00'::timestamp without time zone))
                       Buffers: shared hit=249126 read=418777
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47716.81 rows=2292998 width=0) (actual time=1657.342..1657.342 rows=2275024 loops=1)
                             Index Cond: ((l_shipdate >= '1994-10-01'::date) AND (l_shipdate < '1994-12-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6129
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.114..7.398 rows=13954 loops=1)
         Buffers: shared hit=394 read=1
   ->  Sort  (cost=1204502.73..1204512.14 rows=3764 width=12) (actual time=31769.173..31769.175 rows=1 loops=1)
         Sort Key: revenue12.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=554722 read=781085
         ->  Subquery Scan on revenue12  (cost=1204194.49..1204279.18 rows=3764 width=12) (actual time=31734.969..31769.140 rows=1 loops=1)
               Buffers: shared hit=554722 read=781085
               ->  HashAggregate  (cost=1204194.49..1204241.54 rows=3764 width=12) (actual time=31734.967..31769.135 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=554722 read=781085
                     ->  Bitmap Heap Scan on lineitem  (cost=48290.06..1164067.03 rows=2292998 width=12) (actual time=2562.433..13599.401 rows=2243588 loops=1)
                           Recheck Cond: ((l_shipdate >= '1994-10-01'::date) AND (l_shipdate < '1994-12-30 00:00:00'::timestamp without time zone))
                           Buffers: shared hit=305596 read=362308
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47716.81 rows=2292998 width=0) (actual time=2163.204..2163.204 rows=2275024 loops=1)
                                 Index Cond: ((l_shipdate >= '1994-10-01'::date) AND (l_shipdate < '1994-12-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared read=6130
 Total runtime: 31795.492 ms
(33 rows)

drop view revenue12;
DROP VIEW
COMMIT;
COMMIT