BEGIN;
BEGIN
create or replace view revenue8 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1996-04-01'
		and l_shipdate < date'1996-04-01' + 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,
	revenue8
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue8
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2363957.25..2369055.01 rows=3771 width=79) (actual time=19910.959..19910.964 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue8.supplier_no)
   Buffers: shared hit=715240 read=604929 dirtied=488 written=68
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1173367.52..1173367.53 rows=1 width=8) (actual time=8803.129..8803.129 rows=1 loops=1)
           Buffers: shared hit=383854 read=275670 dirtied=488 written=7
           ->  HashAggregate  (cost=1173282.67..1173320.38 rows=3771 width=12) (actual time=8762.640..8792.951 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=383854 read=275670 dirtied=488 written=7
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=48015.02..1150618.81 rows=2266386 width=12) (actual time=1204.586..6977.973 rows=2246466 loops=1)
                       Recheck Cond: ((l_shipdate >= '1996-04-01'::date) AND (l_shipdate < '1996-06-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=653389
                       Buffers: shared hit=383854 read=275670 dirtied=488 written=7
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47448.43 rows=2266386 width=0) (actual time=907.585..907.585 rows=2250787 loops=1)
                             Index Cond: ((l_shipdate >= '1996-04-01'::date) AND (l_shipdate < '1996-06-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6135
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.048..16.448 rows=40980 loops=1)
         Buffers: shared hit=1121
   ->  Sort  (cost=1190589.43..1190598.85 rows=3771 width=12) (actual time=19890.530..19890.532 rows=1 loops=1)
         Sort Key: revenue8.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=714119 read=604929 dirtied=488 written=68
         ->  Subquery Scan on revenue8  (cost=1190280.57..1190365.41 rows=3771 width=12) (actual time=19885.282..19890.492 rows=1 loops=1)
               Buffers: shared hit=714119 read=604929 dirtied=488 written=68
               ->  HashAggregate  (cost=1190280.57..1190327.70 rows=3771 width=12) (actual time=19885.280..19890.487 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=714119 read=604929 dirtied=488 written=68
                     ->  Bitmap Heap Scan on lineitem  (cost=48015.02..1150618.81 rows=2266386 width=12) (actual time=1906.944..9056.876 rows=2246466 loops=1)
                           Recheck Cond: ((l_shipdate >= '1996-04-01'::date) AND (l_shipdate < '1996-06-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=653389
                           Buffers: shared hit=330265 read=329259 written=61
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47448.43 rows=2266386 width=0) (actual time=1503.769..1503.769 rows=2250787 loops=1)
                                 Index Cond: ((l_shipdate >= '1996-04-01'::date) AND (l_shipdate < '1996-06-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared read=6135
 Planning time: 2.599 ms
 Execution time: 19928.366 ms
(38 rows)

drop view revenue8;
DROP VIEW
COMMIT;
COMMIT