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 >= '1994-01-01'
		and l_shipdate < date'1994-01-01' + 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=2363950.43..2369047.90 rows=3734 width=79) (actual time=32721.147..32721.153 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue4.supplier_no)
   Buffers: shared hit=265516 read=1054397 written=1
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1173443.71..1173443.72 rows=1 width=8) (actual time=17113.509..17113.509 rows=1 loops=1)
           Buffers: shared hit=156294 read=503355 written=1
           ->  HashAggregate  (cost=1173359.69..1173397.03 rows=3734 width=12) (actual time=17018.699..17094.924 rows=100000 loops=1)
                 Buffers: shared hit=156294 read=503355 written=1
                 ->  Bitmap Heap Scan on lineitem  (cost=47555.49..1150904.41 rows=2245528 width=12) (actual time=2162.269..12908.017 rows=2244102 loops=1)
                       Recheck Cond: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1994-04-01 00:00:00'::timestamp without time zone))
                       Buffers: shared hit=156294 read=503355 written=1
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46994.11 rows=2245528 width=0) (actual time=1765.343..1765.343 rows=2250827 loops=1)
                             Index Cond: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1994-04-01 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6130
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.158..9.964 rows=21986 loops=1)
         Buffers: shared hit=614
   ->  Sort  (cost=1190506.71..1190516.05 rows=3734 width=12) (actual time=32708.846..32708.848 rows=1 loops=1)
         Sort Key: revenue4.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=264902 read=1054397 written=1
         ->  Subquery Scan on revenue4  (cost=1190201.15..1190285.17 rows=3734 width=12) (actual time=32668.143..32708.806 rows=1 loops=1)
               Buffers: shared hit=264902 read=1054397 written=1
               ->  HashAggregate  (cost=1190201.15..1190247.83 rows=3734 width=12) (actual time=32668.141..32708.800 rows=1 loops=1)
                     Filter: (sum((public.lineitem.l_extendedprice * (1::double precision - public.lineitem.l_discount))) = $0)
                     Rows Removed by Filter: 99999
                     Buffers: shared hit=264902 read=1054397 written=1
                     ->  Bitmap Heap Scan on lineitem  (cost=47555.49..1150904.41 rows=2245528 width=12) (actual time=2054.794..11959.919 rows=2244102 loops=1)
                           Recheck Cond: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1994-04-01 00:00:00'::timestamp without time zone))
                           Buffers: shared hit=108608 read=551042
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46994.11 rows=2245528 width=0) (actual time=1582.669..1582.669 rows=2250827 loops=1)
                                 Index Cond: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1994-04-01 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=3 read=6128
 Total runtime: 32735.607 ms
(33 rows)

drop view revenue4;
DROP VIEW
COMMIT;
COMMIT