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 >= '1993-09-01'
		and l_shipdate < date'1993-09-01' + 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=4025626.52..4030725.07 rows=3823 width=79) (actual time=40547.569..40547.571 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue9.supplier_no)
   Buffers: shared hit=1055084 read=1094730 written=3
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=2004046.15..2004046.16 rows=1 width=8) (actual time=19863.801..19863.801 rows=1 loops=1)
           Buffers: shared hit=540302 read=533613
           ->  HashAggregate  (cost=2003960.14..2003998.36 rows=3823 width=12) (actual time=19822.216..19852.622 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=540302 read=533613
                 ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1980884.89 rows=2307525 width=12) (actual time=0.046..17926.235 rows=2249148 loops=1)
                       Filter: ((l_shipdate >= '1993-09-01'::date) AND (l_shipdate < '1993-11-30 00:00:00'::timestamp without time zone))
                       Rows Removed by Filter: 57795516
                       Buffers: shared hit=540302 read=533613
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.027..22.801 rows=72980 loops=1)
         Buffers: shared hit=1984
   ->  Sort  (cost=2021580.07..2021589.63 rows=3823 width=12) (actual time=40517.547..40517.548 rows=1 loops=1)
         Sort Key: revenue9.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=1053100 read=1094730 written=3
         ->  Subquery Scan on revenue9  (cost=2021266.57..2021352.59 rows=3823 width=12) (actual time=40501.208..40517.527 rows=1 loops=1)
               Buffers: shared hit=1053100 read=1094730 written=3
               ->  HashAggregate  (cost=2021266.57..2021314.36 rows=3823 width=12) (actual time=40501.207..40517.525 rows=1 loops=1)
                     Group Key: lineitem.l_suppkey
                     Filter: (sum((lineitem.l_extendedprice * (1::double precision - lineitem.l_discount))) = $0)
                     Rows Removed by Filter: 99999
                     Buffers: shared hit=1053100 read=1094730 written=3
                     ->  Seq Scan on lineitem  (cost=0.00..1980884.89 rows=2307525 width=12) (actual time=0.044..18469.127 rows=2249148 loops=1)
                           Filter: ((l_shipdate >= '1993-09-01'::date) AND (l_shipdate < '1993-11-30 00:00:00'::timestamp without time zone))
                           Rows Removed by Filter: 57795516
                           Buffers: shared hit=512798 read=561117 written=3
 Planning time: 1.973 ms
 Execution time: 40549.421 ms
(32 rows)

drop view revenue9;
DROP VIEW
COMMIT;
COMMIT