BEGIN;
BEGIN
create or replace view revenue18 (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,
	revenue18
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue18
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2388248.31..2393345.94 rows=3744 width=79) (actual time=40543.878..40543.881 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue18.supplier_no)
   Buffers: shared hit=522146 read=812737 dirtied=652 written=226
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1185461.61..1185461.62 rows=1 width=8) (actual time=21510.498..21510.498 rows=1 loops=1)
           Buffers: shared hit=116930 read=550359 written=182
           ->  HashAggregate  (cost=1185377.37..1185414.81 rows=3744 width=12) (actual time=21408.428..21492.949 rows=100000 loops=1)
                 Buffers: shared hit=116930 read=550359 written=182
                 ->  Bitmap Heap Scan on lineitem  (cost=48048.77..1162573.53 rows=2280384 width=12) (actual time=2717.256..17086.079 rows=2246496 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=116930 read=550359 written=182
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47478.67 rows=2280384 width=0) (actual time=2295.448..2295.448 rows=2275527 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=2 read=6134
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.106..5.490 rows=10906 loops=1)
         Buffers: shared hit=303 read=1
   ->  Sort  (cost=1202786.70..1202796.06 rows=3744 width=12) (actual time=40537.174..40537.174 rows=1 loops=1)
         Sort Key: revenue18.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=521843 read=812736 dirtied=652 written=226
         ->  Subquery Scan on revenue18  (cost=1202480.25..1202564.49 rows=3744 width=12) (actual time=40512.279..40537.138 rows=1 loops=1)
               Buffers: shared hit=521843 read=812736 dirtied=652 written=226
               ->  HashAggregate  (cost=1202480.25..1202527.05 rows=3744 width=12) (actual time=40512.278..40537.135 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=521843 read=812736 dirtied=652 written=226
                     ->  Bitmap Heap Scan on lineitem  (cost=48048.77..1162573.53 rows=2280384 width=12) (actual time=2424.360..14870.331 rows=2246496 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=404913 read=262377 dirtied=652 written=44
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47478.67 rows=2280384 width=0) (actual time=2038.370..2038.370 rows=2275527 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=6137
 Total runtime: 40560.833 ms
(33 rows)

drop view revenue18;
DROP VIEW
COMMIT;
COMMIT