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 >= '1993-08-01'
		and l_shipdate < date'1993-08-01' + 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=2365639.36..2370737.15 rows=3755 width=79) (actual time=32440.069..32440.075 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue4.supplier_no)
   Buffers: shared hit=450899 read=872894
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1174224.08..1174224.09 rows=1 width=8) (actual time=14668.191..14668.191 rows=1 loops=1)
           Buffers: shared hit=253915 read=406622
           ->  HashAggregate  (cost=1174139.59..1174177.14 rows=3755 width=12) (actual time=14592.628..14656.434 rows=100000 loops=1)
                 Buffers: shared hit=253915 read=406622
                 ->  Bitmap Heap Scan on lineitem  (cost=47912.77..1151515.26 rows=2262433 width=12) (actual time=2128.760..10912.802 rows=2248668 loops=1)
                       Recheck Cond: ((l_shipdate >= '1993-08-01'::date) AND (l_shipdate < '1993-10-30 00:00:00'::timestamp without time zone))
                       Buffers: shared hit=253915 read=406622
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47347.16 rows=2262433 width=0) (actual time=1707.690..1707.690 rows=2255273 loops=1)
                             Index Cond: ((l_shipdate >= '1993-08-01'::date) AND (l_shipdate < '1993-10-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6141
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.041..47.872 rows=99925 loops=1)
         Buffers: shared hit=2718
   ->  Sort  (cost=1191415.27..1191424.66 rows=3755 width=12) (actual time=32381.676..32381.679 rows=1 loops=1)
         Sort Key: revenue4.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=448181 read=872894
         ->  Subquery Scan on revenue4  (cost=1191107.84..1191192.33 rows=3755 width=12) (actual time=32371.622..32381.638 rows=1 loops=1)
               Buffers: shared hit=448181 read=872894
               ->  HashAggregate  (cost=1191107.84..1191154.78 rows=3755 width=12) (actual time=32371.619..32381.632 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=448181 read=872894
                     ->  Bitmap Heap Scan on lineitem  (cost=47912.77..1151515.26 rows=2262433 width=12) (actual time=2295.967..13579.171 rows=2248668 loops=1)
                           Recheck Cond: ((l_shipdate >= '1993-08-01'::date) AND (l_shipdate < '1993-10-30 00:00:00'::timestamp without time zone))
                           Buffers: shared hit=194266 read=466272
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47347.16 rows=2262433 width=0) (actual time=1869.402..1869.402 rows=2255273 loops=1)
                                 Index Cond: ((l_shipdate >= '1993-08-01'::date) AND (l_shipdate < '1993-10-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=3 read=6139
 Total runtime: 32460.721 ms
(33 rows)

drop view revenue4;
DROP VIEW
COMMIT;
COMMIT