BEGIN;
BEGIN
create or replace view revenue2 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1994-04-01'
		and l_shipdate < date'1994-04-01' + 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,
	revenue2
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue2
	)
order by
	s_suppkey;
                                                                                      QUERY PLAN                                                                                       
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2360762.97..2365859.82 rows=3710 width=79) (actual time=17767.291..17767.295 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue2.supplier_no)
   Buffers: shared hit=198552 read=1122207 dirtied=591 written=225
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1171892.19..1171892.20 rows=1 width=8) (actual time=7860.262..7860.262 rows=1 loops=1)
           Buffers: shared hit=107360 read=552282
           ->  HashAggregate  (cost=1171808.72..1171845.82 rows=3710 width=12) (actual time=7827.443..7850.720 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=107360 read=552282
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=47339.62..1149464.28 rows=2234444 width=12) (actual time=1153.204..6171.823 rows=2243386 loops=1)
                       Recheck Cond: ((l_shipdate >= '1994-04-01'::date) AND (l_shipdate < '1994-06-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=653508
                       Buffers: shared hit=107360 read=552282
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46781.01 rows=2234444 width=0) (actual time=856.798..856.798 rows=2250325 loops=1)
                             Index Cond: ((l_shipdate >= '1994-04-01'::date) AND (l_shipdate < '1994-06-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6134
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.034..20.054 rows=53995 loops=1)
         Buffers: shared hit=1474 read=1
   ->  Sort  (cost=1188870.47..1188879.75 rows=3710 width=12) (actual time=17742.355..17742.356 rows=1 loops=1)
         Sort Key: revenue2.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=197078 read=1122206 dirtied=591 written=225
         ->  Subquery Scan on revenue2  (cost=1188567.05..1188650.52 rows=3710 width=12) (actual time=17736.704..17742.316 rows=1 loops=1)
               Buffers: shared hit=197078 read=1122206 dirtied=591 written=225
               ->  HashAggregate  (cost=1188567.05..1188613.42 rows=3710 width=12) (actual time=17736.703..17742.315 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=197078 read=1122206 dirtied=591 written=225
                     ->  Bitmap Heap Scan on lineitem  (cost=47339.62..1149464.28 rows=2234444 width=12) (actual time=1276.453..8007.177 rows=2243386 loops=1)
                           Recheck Cond: ((l_shipdate >= '1994-04-01'::date) AND (l_shipdate < '1994-06-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=653508
                           Buffers: shared hit=89718 read=569924 dirtied=591 written=225
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46781.01 rows=2234444 width=0) (actual time=973.721..973.721 rows=2250325 loops=1)
                                 Index Cond: ((l_shipdate >= '1994-04-01'::date) AND (l_shipdate < '1994-06-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared read=6134
 Planning time: 2.290 ms
 Execution time: 17773.904 ms
(38 rows)

drop view revenue2;
DROP VIEW
COMMIT;
COMMIT