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 >= '1996-08-01'
		and l_shipdate < date'1996-08-01' + 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,
	revenue7
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue7
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2394823.37..2399921.79 rows=3797 width=79) (actual time=101924.507..101924.511 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue7.supplier_no)
   Buffers: shared hit=680088 read=657316 written=6897
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1188627.41..1188627.42 rows=1 width=8) (actual time=43783.358..43783.359 rows=1 loops=1)
           Buffers: shared hit=389539 read=278316 written=49
           ->  HashAggregate  (cost=1188541.98..1188579.95 rows=3797 width=12) (actual time=43699.114..43769.937 rows=100000 loops=1)
                 Buffers: shared hit=389539 read=278316 written=49
                 ->  Bitmap Heap Scan on lineitem  (cost=48684.65..1165418.25 rows=2312373 width=12) (actual time=3064.268..38778.972 rows=2245045 loops=1)
                       Recheck Cond: ((l_shipdate >= '1996-08-01'::date) AND (l_shipdate < '1996-10-30 00:00:00'::timestamp without time zone))
                       Buffers: shared hit=389539 read=278316 written=49
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..48106.56 rows=2312373 width=0) (actual time=2648.812..2648.812 rows=2281025 loops=1)
                             Index Cond: ((l_shipdate >= '1996-08-01'::date) AND (l_shipdate < '1996-10-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6138
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.685..61.142 rows=61965 loops=1)
         Buffers: shared hit=1691 read=1
   ->  Sort  (cost=1206195.95..1206205.44 rows=3797 width=12) (actual time=101852.683..101852.683 rows=1 loops=1)
         Sort Key: revenue7.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=678397 read=657315 written=6897
         ->  Subquery Scan on revenue7  (cost=1205884.77..1205970.21 rows=3797 width=12) (actual time=101781.976..101852.618 rows=1 loops=1)
               Buffers: shared hit=678397 read=657315 written=6897
               ->  HashAggregate  (cost=1205884.77..1205932.24 rows=3797 width=12) (actual time=101781.973..101852.614 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=678397 read=657315 written=6897
                     ->  Bitmap Heap Scan on lineitem  (cost=48684.65..1165418.25 rows=2312373 width=12) (actual time=3119.965..53084.554 rows=2245045 loops=1)
                           Recheck Cond: ((l_shipdate >= '1996-08-01'::date) AND (l_shipdate < '1996-10-30 00:00:00'::timestamp without time zone))
                           Buffers: shared hit=288858 read=378999 written=6848
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..48106.56 rows=2312373 width=0) (actual time=2661.385..2661.385 rows=2280246 loops=1)
                                 Index Cond: ((l_shipdate >= '1996-08-01'::date) AND (l_shipdate < '1996-10-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=551 read=5588 written=211
 Total runtime: 101943.376 ms
(33 rows)

drop view revenue7;
DROP VIEW
COMMIT;
COMMIT