BEGIN;
BEGIN
create or replace view revenue2 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1997-07-01'
		and l_shipdate < date'1997-07-01' + 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,
	revenue2
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue2
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2367874.60..2372972.14 rows=3756 width=79) (actual time=18228.017..18228.022 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue2.supplier_no)
   Buffers: shared hit=771565 read=553312 written=92
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1175335.97..1175335.98 rows=1 width=8) (actual time=8695.572..8695.572 rows=1 loops=1)
           Buffers: shared hit=364731 read=297214 written=92
           ->  HashAggregate  (cost=1175251.46..1175289.02 rows=3756 width=12) (actual time=8654.542..8685.492 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=364731 read=297214 written=92
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=47913.66..1152612.34 rows=2263912 width=12) (actual time=1253.909..6829.001 rows=2246881 loops=1)
                       Recheck Cond: ((l_shipdate >= '1997-07-01'::date) AND (l_shipdate < '1997-09-29 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=655808
                       Buffers: shared hit=364731 read=297214 written=92
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47347.68 rows=2263912 width=0) (actual time=954.774..954.774 rows=2255901 loops=1)
                             Index Cond: ((l_shipdate >= '1997-07-01'::date) AND (l_shipdate < '1997-09-29 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6137 written=4
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.036..14.109 rows=35977 loops=1)
         Buffers: shared hit=987
   ->  Sort  (cost=1192538.33..1192547.72 rows=3756 width=12) (actual time=18210.398..18210.401 rows=1 loops=1)
         Sort Key: revenue2.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=770578 read=553312 written=92
         ->  Subquery Scan on revenue2  (cost=1192230.80..1192315.31 rows=3756 width=12) (actual time=18196.252..18210.368 rows=1 loops=1)
               Buffers: shared hit=770578 read=553312 written=92
               ->  HashAggregate  (cost=1192230.80..1192277.75 rows=3756 width=12) (actual time=18196.250..18210.364 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=770578 read=553312 written=92
                     ->  Bitmap Heap Scan on lineitem  (cost=47913.66..1152612.34 rows=2263912 width=12) (actual time=1311.974..7621.567 rows=2246881 loops=1)
                           Recheck Cond: ((l_shipdate >= '1997-07-01'::date) AND (l_shipdate < '1997-09-29 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=655808
                           Buffers: shared hit=405847 read=256098
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47347.68 rows=2263912 width=0) (actual time=1007.040..1007.040 rows=2255901 loops=1)
                                 Index Cond: ((l_shipdate >= '1997-07-01'::date) AND (l_shipdate < '1997-09-29 00:00:00'::timestamp without time zone))
                                 Buffers: shared read=6137
 Planning time: 2.619 ms
 Execution time: 18247.917 ms
(38 rows)

drop view revenue2;
DROP VIEW
COMMIT;
COMMIT