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 >= '1996-12-01'
		and l_shipdate < date'1996-12-01' + 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=2392557.18..2397655.46 rows=3788 width=79) (actual time=35229.849..35229.851 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue7.supplier_no)
   Buffers: shared hit=295294 read=1040873 written=912
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1187530.63..1187530.64 rows=1 width=8) (actual time=16415.091..16415.091 rows=1 loops=1)
           Buffers: shared hit=180440 read=487491 written=26
           ->  HashAggregate  (cost=1187445.40..1187483.28 rows=3788 width=12) (actual time=16345.662..16402.462 rows=100000 loops=1)
                 Buffers: shared hit=180440 read=487491 written=26
                 ->  Bitmap Heap Scan on lineitem  (cost=48494.20..1164417.72 rows=2302768 width=12) (actual time=2013.618..12425.406 rows=2246387 loops=1)
                       Recheck Cond: ((l_shipdate >= '1996-12-01'::date) AND (l_shipdate < '1997-03-01 00:00:00'::timestamp without time zone))
                       Buffers: shared hit=180440 read=487491 written=26
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47918.51 rows=2302768 width=0) (actual time=1510.724..1510.724 rows=2277671 loops=1)
                             Index Cond: ((l_shipdate >= '1996-12-01'::date) AND (l_shipdate < '1997-03-01 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6136
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.121..5.339 rows=10906 loops=1)
         Buffers: shared hit=303 read=1
   ->  Sort  (cost=1205026.54..1205036.01 rows=3788 width=12) (actual time=35223.367..35223.367 rows=1 loops=1)
         Sort Key: revenue7.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=294991 read=1040872 written=912
         ->  Subquery Scan on revenue7  (cost=1204716.16..1204801.39 rows=3788 width=12) (actual time=35203.566..35223.331 rows=1 loops=1)
               Buffers: shared hit=294991 read=1040872 written=912
               ->  HashAggregate  (cost=1204716.16..1204763.51 rows=3788 width=12) (actual time=35203.563..35223.326 rows=1 loops=1)
                     Filter: (sum((public.lineitem.l_extendedprice * (1::double precision - public.lineitem.l_discount))) = $0)
                     Rows Removed by Filter: 99999
                     Buffers: shared hit=294991 read=1040872 written=912
                     ->  Bitmap Heap Scan on lineitem  (cost=48494.20..1164417.72 rows=2302768 width=12) (actual time=2452.024..14777.359 rows=2246387 loops=1)
                           Recheck Cond: ((l_shipdate >= '1996-12-01'::date) AND (l_shipdate < '1997-03-01 00:00:00'::timestamp without time zone))
                           Buffers: shared hit=114551 read=553381 written=886
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47918.51 rows=2302768 width=0) (actual time=2026.823..2026.823 rows=2277671 loops=1)
                                 Index Cond: ((l_shipdate >= '1996-12-01'::date) AND (l_shipdate < '1997-03-01 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=3 read=6134
 Total runtime: 35250.860 ms
(33 rows)

drop view revenue7;
DROP VIEW
COMMIT;
COMMIT