BEGIN;
BEGIN
create or replace view revenue5 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1993-02-01'
		and l_shipdate < date'1993-02-01' + 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,
	revenue5
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue5
	)
order by
	s_suppkey;
                                                                       QUERY PLAN                                                                       
--------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=4001070.80..4006168.75 rows=3783 width=79) (actual time=40222.731..40222.734 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue5.supplier_no)
   Buffers: shared hit=1162472 read=974086
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1991912.04..1991912.05 rows=1 width=8) (actual time=19808.245..19808.245 rows=1 loops=1)
           Buffers: shared hit=702938 read=364605
           ->  HashAggregate  (cost=1991826.92..1991864.75 rows=3783 width=12) (actual time=19767.887..19797.292 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=702938 read=364605
                 ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1969131.44 rows=2269548 width=12) (actual time=0.017..17966.257 rows=2250213 loops=1)
                       Filter: ((l_shipdate >= '1993-02-01'::date) AND (l_shipdate < '1993-05-02 00:00:00'::timestamp without time zone))
                       Rows Removed by Filter: 57795390
                       Buffers: shared hit=702938 read=364605
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.035..15.030 rows=53897 loops=1)
         Buffers: shared hit=1466 read=6
   ->  Sort  (cost=2009158.46..2009167.92 rows=3783 width=12) (actual time=40202.267..40202.268 rows=1 loops=1)
         Sort Key: revenue5.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=1161006 read=974080
         ->  Subquery Scan on revenue5  (cost=2008848.53..2008933.65 rows=3783 width=12) (actual time=40180.716..40202.246 rows=1 loops=1)
               Buffers: shared hit=1161006 read=974080
               ->  HashAggregate  (cost=2008848.53..2008895.82 rows=3783 width=12) (actual time=40180.715..40202.243 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=1161006 read=974080
                     ->  Seq Scan on lineitem  (cost=0.00..1969131.44 rows=2269548 width=12) (actual time=0.014..18491.907 rows=2250213 loops=1)
                           Filter: ((l_shipdate >= '1993-02-01'::date) AND (l_shipdate < '1993-05-02 00:00:00'::timestamp without time zone))
                           Rows Removed by Filter: 57795390
                           Buffers: shared hit=458068 read=609475
 Planning time: 2.023 ms
 Execution time: 40224.930 ms
(32 rows)

drop view revenue5;
DROP VIEW
COMMIT;
COMMIT