BEGIN;
BEGIN
create or replace view revenue7 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1993-09-01'
		and l_shipdate < date'1993-09-01' + 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,
	revenue7
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue7
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2385129.99..2390227.29 rows=3740 width=79) (actual time=18824.114..18824.119 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue7.supplier_no)
   Buffers: shared hit=576221 read=758745 written=54
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1183941.64..1183941.65 rows=1 width=8) (actual time=8567.924..8567.924 rows=1 loops=1)
           Buffers: shared hit=285112 read=381379
           ->  HashAggregate  (cost=1183857.49..1183894.89 rows=3740 width=12) (actual time=8526.227..8557.593 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=285112 read=381379
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=47847.32..1161158.22 rows=2269927 width=12) (actual time=1333.518..6725.915 rows=2249633 loops=1)
                       Recheck Cond: ((l_shipdate >= '1993-09-01'::date) AND (l_shipdate < '1993-11-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=660350
                       Buffers: shared hit=285112 read=381379
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47279.84 rows=2269927 width=0) (actual time=1018.294..1018.294 rows=2275805 loops=1)
                             Index Cond: ((l_shipdate >= '1993-09-01'::date) AND (l_shipdate < '1993-11-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6141
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.038..28.013 rows=72980 loops=1)
         Buffers: shared hit=1984
   ->  Sort  (cost=1201188.04..1201197.39 rows=3740 width=12) (actual time=18789.099..18789.101 rows=1 loops=1)
         Sort Key: revenue7.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=574237 read=758745 written=54
         ->  Subquery Scan on revenue7  (cost=1200881.94..1200966.09 rows=3740 width=12) (actual time=18760.871..18789.057 rows=1 loops=1)
               Buffers: shared hit=574237 read=758745 written=54
               ->  HashAggregate  (cost=1200881.94..1200928.69 rows=3740 width=12) (actual time=18760.870..18789.055 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=574237 read=758745 written=54
                     ->  Bitmap Heap Scan on lineitem  (cost=47847.32..1161158.22 rows=2269927 width=12) (actual time=1375.657..7631.762 rows=2249633 loops=1)
                           Recheck Cond: ((l_shipdate >= '1993-09-01'::date) AND (l_shipdate < '1993-11-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=660350
                           Buffers: shared hit=289125 read=377366 written=54
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47279.84 rows=2269927 width=0) (actual time=1020.847..1020.847 rows=2275805 loops=1)
                                 Index Cond: ((l_shipdate >= '1993-09-01'::date) AND (l_shipdate < '1993-11-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared read=6141
 Planning time: 2.958 ms
 Execution time: 18838.371 ms
(38 rows)

drop view revenue7;
DROP VIEW
COMMIT;
COMMIT