BEGIN;
BEGIN
create or replace view revenue4 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1997-10-01'
		and l_shipdate < date'1997-10-01' + 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,
	revenue4
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue4
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2365699.52..2370797.66 rows=3796 width=79) (actual time=20803.787..20803.793 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue4.supplier_no)
   Buffers: shared hit=655135 read=665702 written=98
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1174172.66..1174172.67 rows=1 width=8) (actual time=10210.751..10210.751 rows=1 loops=1)
           Buffers: shared hit=331013 read=328442
           ->  HashAggregate  (cost=1174087.25..1174125.21 rows=3796 width=12) (actual time=10127.056..10200.125 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=331013 read=328442
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=48385.15..1151249.61 rows=2283764 width=12) (actual time=1773.095..8152.554 rows=2244081 loops=1)
                       Recheck Cond: ((l_shipdate >= '1997-10-01'::date) AND (l_shipdate < '1997-12-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=653326
                       Buffers: shared hit=331013 read=328442
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47814.21 rows=2283764 width=0) (actual time=1375.128..1375.128 rows=2248556 loops=1)
                             Index Cond: ((l_shipdate >= '1997-10-01'::date) AND (l_shipdate < '1997-12-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6129
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.039..30.214 rows=70888 loops=1)
         Buffers: shared hit=1927
   ->  Sort  (cost=1191526.56..1191536.05 rows=3796 width=12) (actual time=20766.179..20766.182 rows=1 loops=1)
         Sort Key: revenue4.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=653208 read=665702 written=98
         ->  Subquery Scan on revenue4  (cost=1191215.48..1191300.89 rows=3796 width=12) (actual time=20757.424..20766.143 rows=1 loops=1)
               Buffers: shared hit=653208 read=665702 written=98
               ->  HashAggregate  (cost=1191215.48..1191262.93 rows=3796 width=12) (actual time=20757.422..20766.138 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=653208 read=665702 written=98
                     ->  Bitmap Heap Scan on lineitem  (cost=48385.15..1151249.61 rows=2283764 width=12) (actual time=1350.747..8518.793 rows=2244081 loops=1)
                           Recheck Cond: ((l_shipdate >= '1997-10-01'::date) AND (l_shipdate < '1997-12-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=653326
                           Buffers: shared hit=322195 read=337260 written=98
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47814.21 rows=2283764 width=0) (actual time=1037.396..1037.396 rows=2248556 loops=1)
                                 Index Cond: ((l_shipdate >= '1997-10-01'::date) AND (l_shipdate < '1997-12-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared read=6129
 Planning time: 2.629 ms
 Execution time: 20820.928 ms
(38 rows)

drop view revenue4;
DROP VIEW
COMMIT;
COMMIT