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 >= '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,
	revenue4
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue4
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2365223.38..2370321.45 rows=3791 width=79) (actual time=23713.137..23713.144 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue4.supplier_no)
   Buffers: shared hit=775961 read=545483 dirtied=372 written=1496
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1173938.39..1173938.40 rows=1 width=8) (actual time=12737.964..12737.964 rows=1 loops=1)
           Buffers: shared hit=300161 read=360080 written=63
           ->  HashAggregate  (cost=1173853.09..1173891.00 rows=3791 width=12) (actual time=12647.426..12727.293 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=300161 read=360080 written=63
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=48367.21..1151025.14 rows=2282795 width=12) (actual time=1211.961..9117.444 rows=2245771 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=654101
                       Buffers: shared hit=300161 read=360080 written=63
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47796.51 rows=2282795 width=0) (actual time=945.356..945.356 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=0.039..15.027 rows=34927 loops=1)
         Buffers: shared hit=962
   ->  Sort  (cost=1191284.69..1191294.17 rows=3791 width=12) (actual time=23694.472..23694.475 rows=1 loops=1)
         Sort Key: revenue4.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=774999 read=545483 dirtied=372 written=1496
         ->  Subquery Scan on revenue4  (cost=1190974.05..1191059.35 rows=3791 width=12) (actual time=23665.719..23694.435 rows=1 loops=1)
               Buffers: shared hit=774999 read=545483 dirtied=372 written=1496
               ->  HashAggregate  (cost=1190974.05..1191021.44 rows=3791 width=12) (actual time=23665.717..23694.430 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=774999 read=545483 dirtied=372 written=1496
                     ->  Bitmap Heap Scan on lineitem  (cost=48367.21..1151025.14 rows=2282795 width=12) (actual time=1896.300..8770.069 rows=2245771 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=654101
                           Buffers: shared hit=474838 read=185403 dirtied=372 written=1433
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47796.51 rows=2282795 width=0) (actual time=1235.073..1235.073 rows=2252225 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 hit=283 read=5857 written=169
 Planning time: 3.134 ms
 Execution time: 23727.908 ms
(38 rows)

drop view revenue4;
DROP VIEW
COMMIT;
COMMIT