BEGIN;
BEGIN
create or replace view revenue21 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1993-10-01'
		and l_shipdate < date'1993-10-01' + 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,
	revenue21
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue21
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2363971.24..2369068.66 rows=3730 width=79) (actual time=79119.836..79119.839 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue21.supplier_no)
   Buffers: shared hit=812527 read=508351 written=16881
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1173453.61..1173453.62 rows=1 width=8) (actual time=38881.526..38881.527 rows=1 loops=1)
           Buffers: shared hit=411752 read=248393 written=14461
           ->  HashAggregate  (cost=1173369.68..1173406.98 rows=3730 width=12) (actual time=38790.198..38866.230 rows=100000 loops=1)
                 Buffers: shared hit=411752 read=248393 written=14461
                 ->  Bitmap Heap Scan on lineitem  (cost=47561.23..1150912.70 rows=2245698 width=12) (actual time=2648.038..34120.834 rows=2246167 loops=1)
                       Recheck Cond: ((l_shipdate >= '1993-10-01'::date) AND (l_shipdate < '1993-12-30 00:00:00'::timestamp without time zone))
                       Buffers: shared hit=411752 read=248393 written=14461
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46999.81 rows=2245698 width=0) (actual time=2157.052..2157.052 rows=2253608 loops=1)
                             Index Cond: ((l_shipdate >= '1993-10-01'::date) AND (l_shipdate < '1993-12-30 00:00:00'::timestamp without time zone))
                             Buffers: shared hit=634 read=5500 written=225
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.059..28.190 rows=20959 loops=1)
         Buffers: shared hit=587
   ->  Sort  (cost=1190517.63..1190526.95 rows=3730 width=12) (actual time=79088.099..79088.099 rows=1 loops=1)
         Sort Key: revenue21.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=811940 read=508351 written=16881
         ->  Subquery Scan on revenue21  (cost=1190212.42..1190296.34 rows=3730 width=12) (actual time=79066.772..79088.070 rows=1 loops=1)
               Buffers: shared hit=811940 read=508351 written=16881
               ->  HashAggregate  (cost=1190212.42..1190259.04 rows=3730 width=12) (actual time=79066.770..79088.066 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=811940 read=508351 written=16881
                     ->  Bitmap Heap Scan on lineitem  (cost=47561.23..1150912.70 rows=2245698 width=12) (actual time=2974.452..35554.322 rows=2246167 loops=1)
                           Recheck Cond: ((l_shipdate >= '1993-10-01'::date) AND (l_shipdate < '1993-12-30 00:00:00'::timestamp without time zone))
                           Buffers: shared hit=400188 read=259958 written=2420
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46999.81 rows=2245698 width=0) (actual time=2547.195..2547.195 rows=2252538 loops=1)
                                 Index Cond: ((l_shipdate >= '1993-10-01'::date) AND (l_shipdate < '1993-12-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared read=6135
 Total runtime: 79139.460 ms
(33 rows)

drop view revenue21;
DROP VIEW
COMMIT;
COMMIT