BEGIN;
BEGIN
create or replace view revenue1 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1994-05-01'
		and l_shipdate < date'1994-05-01' + 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,
	revenue1
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue1
	)
order by
	s_suppkey;
                                                                                      QUERY PLAN                                                                                       
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2364937.52..2370034.37 rows=3710 width=79) (actual time=17910.890..17910.893 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue1.supplier_no)
   Buffers: shared hit=430673 read=894257 dirtied=656 written=472
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1173979.15..1173979.16 rows=1 width=8) (actual time=8545.171..8545.171 rows=1 loops=1)
           Buffers: shared hit=175084 read=486402 written=135
           ->  HashAggregate  (cost=1173895.68..1173932.78 rows=3710 width=12) (actual time=8512.876..8535.991 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=175084 read=486402 written=135
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=47292.48..1151550.40 rows=2234528 width=12) (actual time=1106.791..6902.090 rows=2245041 loops=1)
                       Recheck Cond: ((l_shipdate >= '1994-05-01'::date) AND (l_shipdate < '1994-07-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=655348
                       Buffers: shared hit=175084 read=486402 written=135
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46733.85 rows=2234528 width=0) (actual time=819.495..819.495 rows=2256575 loops=1)
                             Index Cond: ((l_shipdate >= '1994-05-01'::date) AND (l_shipdate < '1994-07-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6138
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.039..25.807 rows=71902 loops=1)
         Buffers: shared hit=1958
   ->  Sort  (cost=1190958.06..1190967.34 rows=3710 width=12) (actual time=17878.657..17878.658 rows=1 loops=1)
         Sort Key: revenue1.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=428715 read=894257 dirtied=656 written=472
         ->  Subquery Scan on revenue1  (cost=1190654.64..1190738.11 rows=3710 width=12) (actual time=17873.413..17878.625 rows=1 loops=1)
               Buffers: shared hit=428715 read=894257 dirtied=656 written=472
               ->  HashAggregate  (cost=1190654.64..1190701.01 rows=3710 width=12) (actual time=17873.411..17878.622 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=428715 read=894257 dirtied=656 written=472
                     ->  Bitmap Heap Scan on lineitem  (cost=47292.48..1151550.40 rows=2234528 width=12) (actual time=1056.014..7656.893 rows=2245041 loops=1)
                           Recheck Cond: ((l_shipdate >= '1994-05-01'::date) AND (l_shipdate < '1994-07-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=655348
                           Buffers: shared hit=253631 read=407855 dirtied=656 written=337
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46733.85 rows=2234528 width=0) (actual time=789.017..789.017 rows=2256575 loops=1)
                                 Index Cond: ((l_shipdate >= '1994-05-01'::date) AND (l_shipdate < '1994-07-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=2 read=6136
 Planning time: 2.107 ms
 Execution time: 17921.874 ms
(38 rows)

drop view revenue1;
DROP VIEW
COMMIT;
COMMIT