BEGIN;
BEGIN
create or replace view revenue21 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1996-11-01'
		and l_shipdate < date'1996-11-01' + 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,
	revenue21
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue21
	)
order by
	s_suppkey;
                                                                                      QUERY PLAN                                                                                       
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2361595.45..2366692.54 rows=3726 width=79) (actual time=17766.101..17766.106 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue21.supplier_no)
   Buffers: shared hit=782468 read=538951 written=6
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1172276.81..1172276.82 rows=1 width=8) (actual time=9066.165..9066.165 rows=1 loops=1)
           Buffers: shared hit=344731 read=315297
           ->  HashAggregate  (cost=1172192.97..1172230.23 rows=3726 width=12) (actual time=9019.391..9055.459 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=344731 read=315297
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=47516.60..1149765.62 rows=2242735 width=12) (actual time=1198.913..7063.406 rows=2246343 loops=1)
                       Recheck Cond: ((l_shipdate >= '1996-11-01'::date) AND (l_shipdate < '1997-01-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=653890
                       Buffers: shared hit=344731 read=315297
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46955.92 rows=2242735 width=0) (actual time=927.403..927.403 rows=2250904 loops=1)
                             Index Cond: ((l_shipdate >= '1996-11-01'::date) AND (l_shipdate < '1997-01-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6138
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.027..18.096 rows=49906 loops=1)
         Buffers: shared hit=1363
   ->  Sort  (cost=1189318.34..1189327.65 rows=3726 width=12) (actual time=17743.012..17743.014 rows=1 loops=1)
         Sort Key: revenue21.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=781105 read=538951 written=6
         ->  Subquery Scan on revenue21  (cost=1189013.49..1189097.32 rows=3726 width=12) (actual time=17731.283..17742.983 rows=1 loops=1)
               Buffers: shared hit=781105 read=538951 written=6
               ->  HashAggregate  (cost=1189013.49..1189060.06 rows=3726 width=12) (actual time=17731.282..17742.981 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=781105 read=538951 written=6
                     ->  Bitmap Heap Scan on lineitem  (cost=47516.60..1149765.62 rows=2242735 width=12) (actual time=1250.787..6769.262 rows=2246343 loops=1)
                           Recheck Cond: ((l_shipdate >= '1996-11-01'::date) AND (l_shipdate < '1997-01-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=653890
                           Buffers: shared hit=436374 read=223654 written=6
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46955.92 rows=2242735 width=0) (actual time=982.773..982.773 rows=2250904 loops=1)
                                 Index Cond: ((l_shipdate >= '1996-11-01'::date) AND (l_shipdate < '1997-01-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared read=6138
 Planning time: 2.939 ms
 Execution time: 17775.119 ms
(38 rows)

drop view revenue21;
DROP VIEW
COMMIT;
COMMIT