BEGIN;
BEGIN
create or replace view revenue4 (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,
	revenue4
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue4
	)
order by
	s_suppkey;
                                                                                      QUERY PLAN                                                                                       
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2366927.72..2372026.23 rows=3821 width=79) (actual time=19989.051..19989.057 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue4.supplier_no)
   Buffers: shared hit=797067 read=525988 dirtied=357 written=2861
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1174738.45..1174738.46 rows=1 width=8) (actual time=9469.642..9469.642 rows=1 loops=1)
           Buffers: shared hit=325621 read=334577 written=19
           ->  HashAggregate  (cost=1174652.48..1174690.69 rows=3821 width=12) (actual time=9422.095..9459.506 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=325621 read=334577 written=19
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=48654.90..1151688.25 rows=2296423 width=12) (actual time=1253.864..7358.920 rows=2245417 loops=1)
                       Recheck Cond: ((l_shipdate >= '1995-09-01'::date) AND (l_shipdate < '1995-11-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=654059
                       Buffers: shared hit=325621 read=334577 written=19
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..48080.79 rows=2296423 width=0) (actual time=931.747..931.747 rows=2252136 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
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.032..40.605 rows=97885 loops=1)
         Buffers: shared hit=2659
   ->  Sort  (cost=1192188.97..1192198.52 rows=3821 width=12) (actual time=19938.846..19938.848 rows=1 loops=1)
         Sort Key: revenue4.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=794408 read=525988 dirtied=357 written=2861
         ->  Subquery Scan on revenue4  (cost=1191875.65..1191961.62 rows=3821 width=12) (actual time=19912.983..19938.813 rows=1 loops=1)
               Buffers: shared hit=794408 read=525988 dirtied=357 written=2861
               ->  HashAggregate  (cost=1191875.65..1191923.41 rows=3821 width=12) (actual time=19912.981..19938.808 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=794408 read=525988 dirtied=357 written=2861
                     ->  Bitmap Heap Scan on lineitem  (cost=48654.90..1151688.25 rows=2296423 width=12) (actual time=1237.254..7452.400 rows=2245417 loops=1)
                           Recheck Cond: ((l_shipdate >= '1995-09-01'::date) AND (l_shipdate < '1995-11-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=654059
                           Buffers: shared hit=468787 read=191411 dirtied=357 written=2842
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..48080.79 rows=2296423 width=0) (actual time=949.679..949.679 rows=2252132 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=478 read=5661 written=333
 Planning time: 2.392 ms
 Execution time: 20011.061 ms
(38 rows)

drop view revenue4;
DROP VIEW
COMMIT;
COMMIT