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 >= '1997-05-01'
		and l_shipdate < date'1997-05-01' + 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=2365639.36..2370737.43 rows=3791 width=79) (actual time=21905.331..21905.336 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue21.supplier_no)
   Buffers: shared hit=652795 read=668889 written=10
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1174144.84..1174144.85 rows=1 width=8) (actual time=10421.765..10421.765 rows=1 loops=1)
           Buffers: shared hit=308611 read=351750 written=4
           ->  HashAggregate  (cost=1174059.54..1174097.45 rows=3791 width=12) (actual time=10375.996..10410.901 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=308611 read=351750 written=4
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=48371.42..1151227.49 rows=2283205 width=12) (actual time=1909.708..8378.168 rows=2248039 loops=1)
                       Recheck Cond: ((l_shipdate >= '1997-05-01'::date) AND (l_shipdate < '1997-07-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=654221
                       Buffers: shared hit=308611 read=351750 written=4
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47800.62 rows=2283205 width=0) (actual time=1480.104..1480.104 rows=2252515 loops=1)
                             Index Cond: ((l_shipdate >= '1997-05-01'::date) AND (l_shipdate < '1997-07-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6140
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.048..14.567 rows=34927 loops=1)
         Buffers: shared hit=962
   ->  Sort  (cost=1191494.22..1191503.70 rows=3791 width=12) (actual time=21887.244..21887.247 rows=1 loops=1)
         Sort Key: revenue21.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=651833 read=668889 written=10
         ->  Subquery Scan on revenue21  (cost=1191183.58..1191268.88 rows=3791 width=12) (actual time=21872.582..21887.212 rows=1 loops=1)
               Buffers: shared hit=651833 read=668889 written=10
               ->  HashAggregate  (cost=1191183.58..1191230.97 rows=3791 width=12) (actual time=21872.580..21887.208 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=651833 read=668889 written=10
                     ->  Bitmap Heap Scan on lineitem  (cost=48371.42..1151227.49 rows=2283205 width=12) (actual time=1617.968..9097.520 rows=2248039 loops=1)
                           Recheck Cond: ((l_shipdate >= '1997-05-01'::date) AND (l_shipdate < '1997-07-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=654221
                           Buffers: shared hit=343222 read=317139 written=6
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47800.62 rows=2283205 width=0) (actual time=1242.687..1242.687 rows=2252515 loops=1)
                                 Index Cond: ((l_shipdate >= '1997-05-01'::date) AND (l_shipdate < '1997-07-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared read=6140
 Planning time: 4.433 ms
 Execution time: 21912.827 ms
(38 rows)

drop view revenue21;
DROP VIEW
COMMIT;
COMMIT