BEGIN;
BEGIN
create or replace view revenue7 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1994-01-01'
		and l_shipdate < date'1994-01-01' + 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,
	revenue7
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue7
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2387141.88..2392239.94 rows=3773 width=79) (actual time=29314.030..29314.033 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue7.supplier_no)
   Buffers: shared hit=274409 read=1057358 written=217
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1184871.45..1184871.46 rows=1 width=8) (actual time=13348.694..13348.694 rows=1 loops=1)
           Buffers: shared hit=123255 read=542321
           ->  HashAggregate  (cost=1184786.55..1184824.28 rows=3773 width=12) (actual time=13287.285..13338.693 rows=100000 loops=1)
                 Buffers: shared hit=123255 read=542321
                 ->  Bitmap Heap Scan on lineitem  (cost=48275.10..1161886.77 rows=2289978 width=12) (actual time=2037.567..10074.618 rows=2242241 loops=1)
                       Recheck Cond: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1994-04-01 00:00:00'::timestamp without time zone))
                       Buffers: shared hit=123255 read=542321
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47702.61 rows=2289978 width=0) (actual time=1610.103..1610.103 rows=2271411 loops=1)
                             Index Cond: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1994-04-01 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6130
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.108..10.416 rows=21986 loops=1)
         Buffers: shared hit=613 read=1
   ->  Sort  (cost=1202270.43..1202279.86 rows=3773 width=12) (actual time=29301.296..29301.296 rows=1 loops=1)
         Sort Key: revenue7.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=273796 read=1057357 written=217
         ->  Subquery Scan on revenue7  (cost=1201961.39..1202046.28 rows=3773 width=12) (actual time=29283.058..29301.262 rows=1 loops=1)
               Buffers: shared hit=273796 read=1057357 written=217
               ->  HashAggregate  (cost=1201961.39..1202008.55 rows=3773 width=12) (actual time=29283.057..29301.258 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=273796 read=1057357 written=217
                     ->  Bitmap Heap Scan on lineitem  (cost=48275.10..1161886.77 rows=2289978 width=12) (actual time=2428.959..12365.351 rows=2242241 loops=1)
                           Recheck Cond: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1994-04-01 00:00:00'::timestamp without time zone))
                           Buffers: shared hit=150541 read=515036 written=217
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47702.61 rows=2289978 width=0) (actual time=1950.465..1950.465 rows=2271411 loops=1)
                                 Index Cond: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1994-04-01 00:00:00'::timestamp without time zone))
                                 Buffers: shared read=6131 written=4
 Total runtime: 29327.660 ms
(33 rows)

drop view revenue7;
DROP VIEW
COMMIT;
COMMIT