BEGIN;
BEGIN
create or replace view revenue18 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1995-09-01'
		and l_shipdate < date'1995-09-01' + 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,
	revenue18
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue18
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2386195.47..2391292.22 rows=3686 width=79) (actual time=105698.686..105698.689 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue18.supplier_no)
   Buffers: shared hit=393232 read=945323 written=12291
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1184577.71..1184577.72 rows=1 width=8) (actual time=54159.812..54159.813 rows=1 loops=1)
           Buffers: shared hit=303218 read=364729 written=16
           ->  HashAggregate  (cost=1184494.77..1184531.63 rows=3686 width=12) (actual time=54084.494..54145.767 rows=100000 loops=1)
                 Buffers: shared hit=303218 read=364729 written=16
                 ->  Bitmap Heap Scan on lineitem  (cost=47240.47..1162065.85 rows=2242892 width=12) (actual time=2935.358..49186.878 rows=2245011 loops=1)
                       Recheck Cond: ((l_shipdate >= '1995-09-01'::date) AND (l_shipdate < '1995-11-30 00:00:00'::timestamp without time zone))
                       Buffers: shared hit=303218 read=364729 written=16
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46679.75 rows=2242892 width=0) (actual time=2475.108..2475.108 rows=2279099 loops=1)
                             Index Cond: ((l_shipdate >= '1995-09-01'::date) AND (l_shipdate < '1995-11-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6139 written=9
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.110..137.787 rows=97885 loops=1)
         Buffers: shared hit=2660
   ->  Sort  (cost=1201617.75..1201626.97 rows=3686 width=12) (actual time=105543.199..105543.199 rows=1 loops=1)
         Sort Key: revenue18.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=390572 read=945323 written=12291
         ->  Subquery Scan on revenue18  (cost=1201316.46..1201399.40 rows=3686 width=12) (actual time=105510.922..105543.162 rows=1 loops=1)
               Buffers: shared hit=390572 read=945323 written=12291
               ->  HashAggregate  (cost=1201316.46..1201362.54 rows=3686 width=12) (actual time=105510.920..105543.158 rows=1 loops=1)
                     Filter: (sum((public.lineitem.l_extendedprice * (1::double precision - public.lineitem.l_discount))) = $0)
                     Rows Removed by Filter: 99999
                     Buffers: shared hit=390572 read=945323 written=12291
                     ->  Bitmap Heap Scan on lineitem  (cost=47240.47..1162065.85 rows=2242892 width=12) (actual time=2975.714..46427.513 rows=2245011 loops=1)
                           Recheck Cond: ((l_shipdate >= '1995-09-01'::date) AND (l_shipdate < '1995-11-30 00:00:00'::timestamp without time zone))
                           Buffers: shared hit=87354 read=580594 written=12275
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46679.75 rows=2242892 width=0) (actual time=2523.298..2523.298 rows=2278745 loops=1)
                                 Index Cond: ((l_shipdate >= '1995-09-01'::date) AND (l_shipdate < '1995-11-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=619 read=5521 written=528
 Total runtime: 105713.983 ms
(33 rows)

drop view revenue18;
DROP VIEW
COMMIT;
COMMIT