BEGIN;
BEGIN
create or replace view revenue1 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1997-09-01'
		and l_shipdate < date'1997-09-01' + 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,
	revenue1
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue1
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2370195.52..2375292.55 rows=3722 width=79) (actual time=18260.725..18260.729 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue1.supplier_no)
   Buffers: shared hit=668064 read=658138 written=368
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1176565.80..1176565.81 rows=1 width=8) (actual time=9228.631..9228.631 rows=1 loops=1)
           Buffers: shared hit=284846 read=377840 written=280
           ->  HashAggregate  (cost=1176482.05..1176519.27 rows=3722 width=12) (actual time=9184.365..9218.106 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=284846 read=377840 written=280
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=47483.15..1154024.89 rows=2245716 width=12) (actual time=1537.491..7322.574 rows=2245382 loops=1)
                       Recheck Cond: ((l_shipdate >= '1997-09-01'::date) AND (l_shipdate < '1997-11-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=656553
                       Buffers: shared hit=284846 read=377840 written=280
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46921.73 rows=2245716 width=0) (actual time=1199.993..1199.993 rows=2258699 loops=1)
                             Index Cond: ((l_shipdate >= '1997-09-01'::date) AND (l_shipdate < '1997-11-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6133
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.031..12.353 rows=29990 loops=1)
         Buffers: shared hit=830
   ->  Sort  (cost=1193629.42..1193638.72 rows=3722 width=12) (actual time=18245.275..18245.277 rows=1 loops=1)
         Sort Key: revenue1.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=667234 read=658138 written=368
         ->  Subquery Scan on revenue1  (cost=1193324.92..1193408.67 rows=3722 width=12) (actual time=18235.103..18245.241 rows=1 loops=1)
               Buffers: shared hit=667234 read=658138 written=368
               ->  HashAggregate  (cost=1193324.92..1193371.45 rows=3722 width=12) (actual time=18235.101..18245.237 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=667234 read=658138 written=368
                     ->  Bitmap Heap Scan on lineitem  (cost=47483.15..1154024.89 rows=2245716 width=12) (actual time=1580.144..7121.050 rows=2245382 loops=1)
                           Recheck Cond: ((l_shipdate >= '1997-09-01'::date) AND (l_shipdate < '1997-11-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=656553
                           Buffers: shared hit=382388 read=280298 written=88
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46921.73 rows=2245716 width=0) (actual time=1239.326..1239.326 rows=2258699 loops=1)
                                 Index Cond: ((l_shipdate >= '1997-09-01'::date) AND (l_shipdate < '1997-11-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=1 read=6132
 Planning time: 2.504 ms
 Execution time: 18275.889 ms
(38 rows)

drop view revenue1;
DROP VIEW
COMMIT;
COMMIT