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 >= '1997-04-01'
		and l_shipdate < date'1997-04-01' + 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,
	revenue7
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue7
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2387206.99..2392305.25 rows=3804 width=79) (actual time=18323.257..18323.262 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue7.supplier_no)
   Buffers: shared hit=623740 read=709679 written=11912
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1184821.00..1184821.01 rows=1 width=8) (actual time=8927.447..8927.447 rows=1 loops=1)
           Buffers: shared hit=273950 read=392467 written=7227
           ->  HashAggregate  (cost=1184735.41..1184773.45 rows=3804 width=12) (actual time=8881.181..8917.015 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=273950 read=392467 written=7227
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=48752.48..1161617.44 rows=2311797 width=12) (actual time=1229.100..7032.018 rows=2247859 loops=1)
                       Recheck Cond: ((l_shipdate >= '1997-04-01'::date) AND (l_shipdate < '1997-06-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=660274
                       Buffers: shared hit=273950 read=392467 written=7227
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..48174.54 rows=2311797 width=0) (actual time=949.851..949.851 rows=2276210 loops=1)
                             Index Cond: ((l_shipdate >= '1997-04-01'::date) AND (l_shipdate < '1997-06-30 00:00:00'::timestamp without time zone))
                             Buffers: shared hit=785 read=5358 written=424
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.027..8.363 rows=20927 loops=1)
         Buffers: shared hit=585
   ->  Sort  (cost=1202385.69..1202395.20 rows=3804 width=12) (actual time=18312.803..18312.805 rows=1 loops=1)
         Sort Key: revenue7.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=623155 read=709679 written=11912
         ->  Subquery Scan on revenue7  (cost=1202073.89..1202159.48 rows=3804 width=12) (actual time=18307.983..18312.773 rows=1 loops=1)
               Buffers: shared hit=623155 read=709679 written=11912
               ->  HashAggregate  (cost=1202073.89..1202121.44 rows=3804 width=12) (actual time=18307.982..18312.771 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=623155 read=709679 written=11912
                     ->  Bitmap Heap Scan on lineitem  (cost=48752.48..1161617.44 rows=2311797 width=12) (actual time=1332.469..7467.059 rows=2247859 loops=1)
                           Recheck Cond: ((l_shipdate >= '1997-04-01'::date) AND (l_shipdate < '1997-06-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=660274
                           Buffers: shared hit=349205 read=317212 written=4685
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..48174.54 rows=2311797 width=0) (actual time=1016.684..1016.684 rows=2274260 loops=1)
                                 Index Cond: ((l_shipdate >= '1997-04-01'::date) AND (l_shipdate < '1997-06-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared read=6143
 Planning time: 2.611 ms
 Execution time: 18335.216 ms
(38 rows)

drop view revenue7;
DROP VIEW
COMMIT;
COMMIT