BEGIN;
BEGIN
create or replace view revenue20 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1996-01-01'
		and l_shipdate < date'1996-01-01' + 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,
	revenue20
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue20
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2355373.79..2360470.20 rows=3663 width=79) (actual time=55124.373..55124.377 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue20.supplier_no)
   Buffers: shared hit=1130531 read=189359 dirtied=69 written=46
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1169323.93..1169323.94 rows=1 width=8) (actual time=23918.457..23918.457 rows=1 loops=1)
           Buffers: shared hit=514432 read=144559
           ->  HashAggregate  (cost=1169241.52..1169278.15 rows=3663 width=12) (actual time=23850.634..23906.866 rows=100000 loops=1)
                 Buffers: shared hit=514432 read=144559
                 ->  Bitmap Heap Scan on lineitem  (cost=46665.24..1147229.41 rows=2201211 width=12) (actual time=2539.873..19733.066 rows=2243148 loops=1)
                       Recheck Cond: ((l_shipdate >= '1996-01-01'::date) AND (l_shipdate < '1996-03-31 00:00:00'::timestamp without time zone))
                       Buffers: shared hit=514432 read=144559
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46114.94 rows=2201211 width=0) (actual time=2123.149..2123.149 rows=2245303 loops=1)
                             Index Cond: ((l_shipdate >= '1996-01-01'::date) AND (l_shipdate < '1996-03-31 00:00:00'::timestamp without time zone))
                             Buffers: shared hit=2113 read=4014
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.064..41.066 rows=69999 loops=1)
         Buffers: shared hit=191 read=1716
   ->  Sort  (cost=1186049.84..1186059.00 rows=3663 width=12) (actual time=55075.609..55075.610 rows=1 loops=1)
         Sort Key: revenue20.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=1130340 read=187643 dirtied=69 written=46
         ->  Subquery Scan on revenue20  (cost=1185750.60..1185833.02 rows=3663 width=12) (actual time=55044.155..55075.576 rows=1 loops=1)
               Buffers: shared hit=1130340 read=187643 dirtied=69 written=46
               ->  HashAggregate  (cost=1185750.60..1185796.39 rows=3663 width=12) (actual time=55044.154..55075.572 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=1130340 read=187643 dirtied=69 written=46
                     ->  Bitmap Heap Scan on lineitem  (cost=46665.24..1147229.41 rows=2201211 width=12) (actual time=4218.062..26826.006 rows=2243148 loops=1)
                           Recheck Cond: ((l_shipdate >= '1996-01-01'::date) AND (l_shipdate < '1996-03-31 00:00:00'::timestamp without time zone))
                           Buffers: shared hit=615908 read=43084 dirtied=69 written=46
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46114.94 rows=2201211 width=0) (actual time=3528.775..3528.775 rows=2245303 loops=1)
                                 Index Cond: ((l_shipdate >= '1996-01-01'::date) AND (l_shipdate < '1996-03-31 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=4 read=6124 written=46
 Total runtime: 55139.810 ms
(33 rows)

drop view revenue20;
DROP VIEW
COMMIT;
COMMIT