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 >= '1994-10-01'
		and l_shipdate < date'1994-10-01' + 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=2377334.31..2382431.30 rows=3719 width=79) (actual time=20391.216..20391.219 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue3.supplier_no)
   Buffers: shared hit=724975 read=605709 written=1085
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1180101.11..1180101.12 rows=1 width=8) (actual time=9558.704..9558.704 rows=1 loops=1)
           Buffers: shared hit=319454 read=345233 written=257
           ->  HashAggregate  (cost=1180017.43..1180054.62 rows=3719 width=12) (actual time=9514.399..9547.599 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=319454 read=345233 written=257
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=47600.60..1157469.10 rows=2254833 width=12) (actual time=1471.084..7596.217 rows=2241434 loops=1)
                       Recheck Cond: ((l_shipdate >= '1994-10-01'::date) AND (l_shipdate < '1994-12-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=658558
                       Buffers: shared hit=319454 read=345233 written=257
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47036.90 rows=2254833 width=0) (actual time=1140.964..1140.964 rows=2264054 loops=1)
                             Index Cond: ((l_shipdate >= '1994-10-01'::date) AND (l_shipdate < '1994-12-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6129 written=1
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.046..20.016 rows=47970 loops=1)
         Buffers: shared hit=1310
   ->  Sort  (cost=1197232.90..1197242.20 rows=3719 width=12) (actual time=20365.873..20365.875 rows=1 loops=1)
         Sort Key: revenue3.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=723665 read=605709 written=1085
         ->  Subquery Scan on revenue3  (cost=1196928.68..1197012.35 rows=3719 width=12) (actual time=20364.504..20365.839 rows=1 loops=1)
               Buffers: shared hit=723665 read=605709 written=1085
               ->  HashAggregate  (cost=1196928.68..1196975.16 rows=3719 width=12) (actual time=20364.501..20365.835 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=723665 read=605709 written=1085
                     ->  Bitmap Heap Scan on lineitem  (cost=47600.60..1157469.10 rows=2254833 width=12) (actual time=2118.569..8788.033 rows=2241434 loops=1)
                           Recheck Cond: ((l_shipdate >= '1994-10-01'::date) AND (l_shipdate < '1994-12-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=658558
                           Buffers: shared hit=404211 read=260476 written=828
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47036.90 rows=2254833 width=0) (actual time=1727.540..1727.540 rows=2264054 loops=1)
                                 Index Cond: ((l_shipdate >= '1994-10-01'::date) AND (l_shipdate < '1994-12-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=108 read=6021 written=200
 Planning time: 4.008 ms
 Execution time: 20406.890 ms
(38 rows)

drop view revenue3;
DROP VIEW
COMMIT;
COMMIT