BEGIN;
BEGIN
create or replace view revenue3 (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,
	revenue3
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue3
	)
order by
	s_suppkey;
                                                                                      QUERY PLAN                                                                                       
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2377507.75..2382604.79 rows=3723 width=79) (actual time=20633.870..20633.875 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue3.supplier_no)
   Buffers: shared hit=728753 read=601189 written=754
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1180181.30..1180181.31 rows=1 width=8) (actual time=10147.932..10147.932 rows=1 loops=1)
           Buffers: shared hit=379998 read=284170 written=566
           ->  HashAggregate  (cost=1180097.53..1180134.76 rows=3723 width=12) (actual time=10067.284..10137.318 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=379998 read=284170 written=566
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=47638.08..1157532.15 rows=2256538 width=12) (actual time=1637.240..7874.550 rows=2245796 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=658034
                       Buffers: shared hit=379998 read=284170 written=566
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47073.95 rows=2256538 width=0) (actual time=1318.875..1318.875 rows=2266065 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 written=6
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.028..23.127 rows=58899 loops=1)
         Buffers: shared hit=1606
   ->  Sort  (cost=1197326.15..1197335.46 rows=3723 width=12) (actual time=20604.763..20604.765 rows=1 loops=1)
         Sort Key: revenue3.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=727147 read=601189 written=754
         ->  Subquery Scan on revenue3  (cost=1197021.56..1197105.33 rows=3723 width=12) (actual time=20567.270..20604.692 rows=1 loops=1)
               Buffers: shared hit=727147 read=601189 written=754
               ->  HashAggregate  (cost=1197021.56..1197068.10 rows=3723 width=12) (actual time=20567.267..20604.685 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=727147 read=601189 written=754
                     ->  Bitmap Heap Scan on lineitem  (cost=47638.08..1157532.15 rows=2256538 width=12) (actual time=1224.637..7942.295 rows=2245796 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=658034
                           Buffers: shared hit=347149 read=317019 written=188
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47073.95 rows=2256538 width=0) (actual time=955.613..955.613 rows=2266065 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 written=16
 Planning time: 2.486 ms
 Execution time: 20647.654 ms
(38 rows)

drop view revenue3;
DROP VIEW
COMMIT;
COMMIT