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 >= '1994-12-01'
		and l_shipdate < date'1994-12-01' + 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=2366446.95..2371544.89 rows=3765 width=79) (actual time=48972.490..48972.493 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue4.supplier_no)
   Buffers: shared hit=172521 read=1150863 dirtied=1 written=34126
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1174597.23..1174597.24 rows=1 width=8) (actual time=26976.623..26976.623 rows=1 loops=1)
           Buffers: shared hit=118285 read=542899 dirtied=1 written=34126
           ->  HashAggregate  (cost=1174512.52..1174550.17 rows=3765 width=12) (actual time=26871.667..26959.290 rows=100000 loops=1)
                 Buffers: shared hit=118285 read=542899 dirtied=1 written=34126
                 ->  Bitmap Heap Scan on lineitem  (cost=48083.62..1151807.36 rows=2270516 width=12) (actual time=2304.524..22198.071 rows=2248280 loops=1)
                       Recheck Cond: ((l_shipdate >= '1994-12-01'::date) AND (l_shipdate < '1995-03-01 00:00:00'::timestamp without time zone))
                       Buffers: shared hit=118285 read=542899 dirtied=1 written=34126
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47515.99 rows=2270516 width=0) (actual time=1885.994..1885.994 rows=2255106 loops=1)
                             Index Cond: ((l_shipdate >= '1994-12-01'::date) AND (l_shipdate < '1995-03-01 00:00:00'::timestamp without time zone))
                             Buffers: shared hit=1 read=6140
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.077..17.362 rows=37000 loops=1)
         Buffers: shared hit=1015
   ->  Sort  (cost=1191849.71..1191859.12 rows=3765 width=12) (actual time=48951.057..48951.058 rows=1 loops=1)
         Sort Key: revenue4.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=171506 read=1150863 dirtied=1 written=34126
         ->  Subquery Scan on revenue4  (cost=1191541.39..1191626.10 rows=3765 width=12) (actual time=48950.890..48951.029 rows=1 loops=1)
               Buffers: shared hit=171506 read=1150863 dirtied=1 written=34126
               ->  HashAggregate  (cost=1191541.39..1191588.45 rows=3765 width=12) (actual time=48950.889..48951.027 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=171506 read=1150863 dirtied=1 written=34126
                     ->  Bitmap Heap Scan on lineitem  (cost=48083.62..1151807.36 rows=2270516 width=12) (actual time=2576.107..17975.740 rows=2248280 loops=1)
                           Recheck Cond: ((l_shipdate >= '1994-12-01'::date) AND (l_shipdate < '1995-03-01 00:00:00'::timestamp without time zone))
                           Buffers: shared hit=53221 read=607964
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47515.99 rows=2270516 width=0) (actual time=2105.120..2105.120 rows=2255105 loops=1)
                                 Index Cond: ((l_shipdate >= '1994-12-01'::date) AND (l_shipdate < '1995-03-01 00:00:00'::timestamp without time zone))
                                 Buffers: shared read=6142
 Total runtime: 48991.534 ms
(33 rows)

drop view revenue4;
DROP VIEW
COMMIT;
COMMIT