BEGIN;
BEGIN
create or replace view revenue16 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1994-09-01'
		and l_shipdate < date'1994-09-01' + 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,
	revenue16
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue16
	)
order by
	s_suppkey;
                                                                                      QUERY PLAN                                                                                       
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2376364.87..2381462.41 rows=3756 width=79) (actual time=21454.839..21454.843 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue16.supplier_no)
   Buffers: shared hit=734869 read=594135 dirtied=728 written=5119
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1179550.71..1179550.72 rows=1 width=8) (actual time=9981.190..9981.190 rows=1 loops=1)
           Buffers: shared hit=370651 read=293196 written=555
           ->  HashAggregate  (cost=1179466.20..1179503.76 rows=3756 width=12) (actual time=9890.323..9970.729 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=370651 read=293196 written=555
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=47996.75..1156746.02 rows=2272018 width=12) (actual time=1254.774..7436.401 rows=2242395 loops=1)
                       Recheck Cond: ((l_shipdate >= '1994-09-01'::date) AND (l_shipdate < '1994-11-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=657715
                       Buffers: shared hit=370651 read=293196 written=555
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47428.75 rows=2272018 width=0) (actual time=953.812..953.812 rows=2263072 loops=1)
                             Index Cond: ((l_shipdate >= '1994-09-01'::date) AND (l_shipdate < '1994-11-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6132 written=15
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.031..19.655 rows=47970 loops=1)
         Buffers: shared hit=1310
   ->  Sort  (cost=1196813.86..1196823.25 rows=3756 width=12) (actual time=21430.459..21430.461 rows=1 loops=1)
         Sort Key: revenue16.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=733559 read=594135 dirtied=728 written=5119
         ->  Subquery Scan on revenue16  (cost=1196506.33..1196590.84 rows=3756 width=12) (actual time=21427.279..21430.414 rows=1 loops=1)
               Buffers: shared hit=733559 read=594135 dirtied=728 written=5119
               ->  HashAggregate  (cost=1196506.33..1196553.28 rows=3756 width=12) (actual time=21427.277..21430.410 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=733559 read=594135 dirtied=728 written=5119
                     ->  Bitmap Heap Scan on lineitem  (cost=47996.75..1156746.02 rows=2272018 width=12) (actual time=1333.989..8308.034 rows=2242395 loops=1)
                           Recheck Cond: ((l_shipdate >= '1994-09-01'::date) AND (l_shipdate < '1994-11-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=657715
                           Buffers: shared hit=362908 read=300939 dirtied=728 written=4564
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47428.75 rows=2272018 width=0) (actual time=996.391..996.391 rows=2262665 loops=1)
                                 Index Cond: ((l_shipdate >= '1994-09-01'::date) AND (l_shipdate < '1994-11-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=580 read=5552 written=456
 Planning time: 3.188 ms
 Execution time: 21473.596 ms
(38 rows)

drop view revenue16;
DROP VIEW
COMMIT;
COMMIT