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 >= '1993-06-01'
		and l_shipdate < date'1993-06-01' + 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=4044568.10..4049665.67 rows=3758 width=79) (actual time=40823.953..40823.957 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue7.supplier_no)
   Buffers: shared hit=991559 read=1167970
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=2013624.02..2013624.03 rows=1 width=8) (actual time=20005.939..20005.939 rows=1 loops=1)
           Buffers: shared hit=305681 read=773579
           ->  HashAggregate  (cost=2013539.47..2013577.05 rows=3758 width=12) (actual time=19964.073..19994.990 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=305681 read=773579
                 ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1990743.98 rows=2279548 width=12) (actual time=0.015..18087.344 rows=2246070 loops=1)
                       Filter: ((l_shipdate >= '1993-06-01'::date) AND (l_shipdate < '1993-08-30 00:00:00'::timestamp without time zone))
                       Rows Removed by Filter: 57739468
                       Buffers: shared hit=305681 read=773579
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.033..11.824 rows=36837 loops=1)
         Buffers: shared hit=1009
   ->  Sort  (cost=2030943.78..2030953.17 rows=3758 width=12) (actual time=40808.592..40808.593 rows=1 loops=1)
         Sort Key: revenue7.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=990550 read=1167970
         ->  Subquery Scan on revenue7  (cost=2030636.07..2030720.63 rows=3758 width=12) (actual time=40782.789..40808.570 rows=1 loops=1)
               Buffers: shared hit=990550 read=1167970
               ->  HashAggregate  (cost=2030636.07..2030683.05 rows=3758 width=12) (actual time=40782.788..40808.568 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=990550 read=1167970
                     ->  Seq Scan on lineitem  (cost=0.00..1990743.98 rows=2279548 width=12) (actual time=0.019..18560.495 rows=2246070 loops=1)
                           Filter: ((l_shipdate >= '1993-06-01'::date) AND (l_shipdate < '1993-08-30 00:00:00'::timestamp without time zone))
                           Rows Removed by Filter: 57739468
                           Buffers: shared hit=684869 read=394391
 Planning time: 2.466 ms
 Execution time: 40826.411 ms
(32 rows)

drop view revenue7;
DROP VIEW
COMMIT;
COMMIT