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=2372591.86..2377690.62 rows=3837 width=79) (actual time=15109.234..15109.237 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue3.supplier_no)
   Buffers: shared hit=674908 read=648742
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1177515.16..1177515.17 rows=1 width=8) (actual time=6544.445..6544.445 rows=1 loops=1)
           Buffers: shared hit=390386 read=270784
           ->  HashAggregate  (cost=1177428.83..1177467.20 rows=3837 width=12) (actual time=6511.529..6535.077 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=390386 read=270784
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=48912.76..1154318.40 rows=2311043 width=12) (actual time=1172.359..4997.457 rows=2245465 loops=1)
                       Recheck Cond: ((l_shipdate >= '1994-08-01'::date) AND (l_shipdate < '1994-10-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=655030
                       Buffers: shared hit=390386 read=270784
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..48335.00 rows=2311043 width=0) (actual time=875.365..875.365 rows=2256875 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=0.29..4791.49 rows=100000 width=71) (actual time=0.038..16.286 rows=47970 loops=1)
         Buffers: shared hit=1310
   ->  Sort  (cost=1195076.40..1195085.99 rows=3837 width=12) (actual time=15088.505..15088.506 rows=1 loops=1)
         Sort Key: revenue3.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=673598 read=648742
         ->  Subquery Scan on revenue3  (cost=1194761.65..1194847.99 rows=3837 width=12) (actual time=15087.592..15088.461 rows=1 loops=1)
               Buffers: shared hit=673598 read=648742
               ->  HashAggregate  (cost=1194761.65..1194809.62 rows=3837 width=12) (actual time=15087.590..15088.458 rows=1 loops=1)
                     Group Key: lineitem.l_suppkey
                     Filter: (sum((lineitem.l_extendedprice * (1::double precision - lineitem.l_discount))) = $0)
                     Rows Removed by Filter: 99999
                     Buffers: shared hit=673598 read=648742
                     ->  Bitmap Heap Scan on lineitem  (cost=48912.76..1154318.40 rows=2311043 width=12) (actual time=1165.292..6760.454 rows=2245465 loops=1)
                           Recheck Cond: ((l_shipdate >= '1994-08-01'::date) AND (l_shipdate < '1994-10-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=655030
                           Buffers: shared hit=283212 read=377958
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..48335.00 rows=2311043 width=0) (actual time=873.415..873.415 rows=2256875 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
 Planning time: 2.228 ms
 Execution time: 15118.512 ms
(38 rows)

drop view revenue3;
DROP VIEW
COMMIT;
COMMIT