BEGIN;
BEGIN
create or replace view revenue3 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1994-08-01'
		and l_shipdate < date'1994-08-01' + 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,
	revenue3
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue3
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2381316.25..2386414.27 rows=3770 width=79) (actual time=73029.374..73029.376 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue3.supplier_no)
   Buffers: shared hit=408861 read=921861 written=11689
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1181980.91..1181980.92 rows=1 width=8) (actual time=31597.224..31597.224 rows=1 loops=1)
           Buffers: shared hit=256396 read=408309 written=37
           ->  HashAggregate  (cost=1181896.09..1181933.79 rows=3770 width=12) (actual time=31515.680..31584.587 rows=100000 loops=1)
                 Buffers: shared hit=256396 read=408309 written=37
                 ->  Bitmap Heap Scan on lineitem  (cost=48210.49..1159055.45 rows=2284064 width=12) (actual time=2559.793..26979.230 rows=2245331 loops=1)
                       Recheck Cond: ((l_shipdate >= '1994-08-01'::date) AND (l_shipdate < '1994-10-30 00:00:00'::timestamp without time zone))
                       Buffers: shared hit=256396 read=408309 written=37
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47639.47 rows=2284064 width=0) (actual time=2175.093..2175.093 rows=2270203 loops=1)
                             Index Cond: ((l_shipdate >= '1994-08-01'::date) AND (l_shipdate < '1994-10-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6140
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.075..56.601 rows=47970 loops=1)
         Buffers: shared hit=1311
   ->  Sort  (cost=1199335.33..1199344.76 rows=3770 width=12) (actual time=72964.442..72964.443 rows=1 loops=1)
         Sort Key: revenue3.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=407550 read=921861 written=11689
         ->  Subquery Scan on revenue3  (cost=1199026.57..1199111.39 rows=3770 width=12) (actual time=72961.778..72964.408 rows=1 loops=1)
               Buffers: shared hit=407550 read=921861 written=11689
               ->  HashAggregate  (cost=1199026.57..1199073.69 rows=3770 width=12) (actual time=72961.775..72964.403 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=407550 read=921861 written=11689
                     ->  Bitmap Heap Scan on lineitem  (cost=48210.49..1159055.45 rows=2284064 width=12) (actual time=2800.189..36404.310 rows=2245331 loops=1)
                           Recheck Cond: ((l_shipdate >= '1994-08-01'::date) AND (l_shipdate < '1994-10-30 00:00:00'::timestamp without time zone))
                           Buffers: shared hit=151154 read=513552 written=11652
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47639.47 rows=2284064 width=0) (actual time=2372.443..2372.443 rows=2269206 loops=1)
                                 Index Cond: ((l_shipdate >= '1994-08-01'::date) AND (l_shipdate < '1994-10-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=514 read=5627 written=426
 Total runtime: 73042.417 ms
(33 rows)

drop view revenue3;
DROP VIEW
COMMIT;
COMMIT