BEGIN;
BEGIN
create or replace view revenue4 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1997-03-01'
		and l_shipdate < date'1997-03-01' + 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,
	revenue4
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue4
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2363217.89..2368315.47 rows=3758 width=79) (actual time=20336.752..20336.754 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue4.supplier_no)
   Buffers: shared hit=590384 read=730878 dirtied=396 written=13875
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1173026.06..1173026.07 rows=1 width=8) (actual time=9261.427..9261.427 rows=1 loops=1)
           Buffers: shared hit=306082 read=354410 written=1043
           ->  HashAggregate  (cost=1172941.50..1172979.08 rows=3758 width=12) (actual time=9214.098..9252.212 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=306082 read=354410 written=1043
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=47859.08..1150351.73 rows=2258977 width=12) (actual time=1397.046..6687.761 rows=2249656 loops=1)
                       Recheck Cond: ((l_shipdate >= '1997-03-01'::date) AND (l_shipdate < '1997-05-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=654347
                       Buffers: shared hit=306082 read=354410 written=1043
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47294.34 rows=2258977 width=0) (actual time=1064.438..1064.438 rows=2254224 loops=1)
                             Index Cond: ((l_shipdate >= '1997-03-01'::date) AND (l_shipdate < '1997-05-30 00:00:00'::timestamp without time zone))
                             Buffers: shared hit=3 read=6142
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.029..3.876 rows=9914 loops=1)
         Buffers: shared hit=278
   ->  Sort  (cost=1190191.53..1190200.93 rows=3758 width=12) (actual time=20331.984..20331.985 rows=1 loops=1)
         Sort Key: revenue4.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=590106 read=730878 dirtied=396 written=13875
         ->  Subquery Scan on revenue4  (cost=1189883.83..1189968.39 rows=3758 width=12) (actual time=20319.366..20331.951 rows=1 loops=1)
               Buffers: shared hit=590106 read=730878 dirtied=396 written=13875
               ->  HashAggregate  (cost=1189883.83..1189930.81 rows=3758 width=12) (actual time=20319.364..20331.949 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=590106 read=730878 dirtied=396 written=13875
                     ->  Bitmap Heap Scan on lineitem  (cost=47859.08..1150351.73 rows=2258977 width=12) (actual time=1571.797..8306.244 rows=2249656 loops=1)
                           Recheck Cond: ((l_shipdate >= '1997-03-01'::date) AND (l_shipdate < '1997-05-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=654347
                           Buffers: shared hit=284024 read=376468 dirtied=396 written=12832
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47294.34 rows=2258977 width=0) (actual time=1218.629..1218.629 rows=2254224 loops=1)
                                 Index Cond: ((l_shipdate >= '1997-03-01'::date) AND (l_shipdate < '1997-05-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=627 read=5518 written=888
 Planning time: 2.292 ms
 Execution time: 20348.153 ms
(38 rows)

drop view revenue4;
DROP VIEW
COMMIT;
COMMIT