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 >= '1995-02-01'
		and l_shipdate < date'1995-02-01' + 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,
	revenue7
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue7
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2382733.25..2387831.36 rows=3777 width=79) (actual time=24317.496..24317.502 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue7.supplier_no)
   Buffers: shared hit=349019 read=984762 written=170
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1182675.32..1182675.33 rows=1 width=8) (actual time=11073.179..11073.179 rows=1 loops=1)
           Buffers: shared hit=224952 read=440796
           ->  HashAggregate  (cost=1182590.33..1182628.10 rows=3777 width=12) (actual time=11009.319..11063.631 rows=100000 loops=1)
                 Buffers: shared hit=224952 read=440796
                 ->  Bitmap Heap Scan on lineitem  (cost=48276.36..1159712.74 rows=2287759 width=12) (actual time=1900.410..8155.438 rows=2247295 loops=1)
                       Recheck Cond: ((l_shipdate >= '1995-02-01'::date) AND (l_shipdate < '1995-05-02 00:00:00'::timestamp without time zone))
                       Buffers: shared hit=224952 read=440796
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47704.42 rows=2287759 width=0) (actual time=1521.230..1521.230 rows=2272240 loops=1)
                             Index Cond: ((l_shipdate >= '1995-02-01'::date) AND (l_shipdate < '1995-05-02 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6146
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.112..33.784 rows=83967 loops=1)
         Buffers: shared hit=2283 read=1
   ->  Sort  (cost=1200057.92..1200067.36 rows=3777 width=12) (actual time=24275.867..24275.869 rows=1 loops=1)
         Sort Key: revenue7.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=346736 read=984761 written=170
         ->  Subquery Scan on revenue7  (cost=1199748.53..1199833.51 rows=3777 width=12) (actual time=24244.866..24275.819 rows=1 loops=1)
               Buffers: shared hit=346736 read=984761 written=170
               ->  HashAggregate  (cost=1199748.53..1199795.74 rows=3777 width=12) (actual time=24244.863..24275.810 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=346736 read=984761 written=170
                     ->  Bitmap Heap Scan on lineitem  (cost=48276.36..1159712.74 rows=2287759 width=12) (actual time=2221.755..10206.607 rows=2247295 loops=1)
                           Recheck Cond: ((l_shipdate >= '1995-02-01'::date) AND (l_shipdate < '1995-05-02 00:00:00'::timestamp without time zone))
                           Buffers: shared hit=121784 read=543965 written=170
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47704.42 rows=2287759 width=0) (actual time=1765.957..1765.957 rows=2272240 loops=1)
                                 Index Cond: ((l_shipdate >= '1995-02-01'::date) AND (l_shipdate < '1995-05-02 00:00:00'::timestamp without time zone))
                                 Buffers: shared read=6147
 Total runtime: 24333.474 ms
(33 rows)

drop view revenue7;
DROP VIEW
COMMIT;
COMMIT