BEGIN;
BEGIN
create or replace view revenue10 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1997-09-01'
		and l_shipdate < date'1997-09-01' + 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,
	revenue10
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue10
	)
order by
	s_suppkey;
                                                                                      QUERY PLAN                                                                                       
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2359297.59..2364394.68 rows=3726 width=79) (actual time=15717.735..15717.740 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue10.supplier_no)
   Buffers: shared hit=1030007 read=289853 dirtied=201 written=8
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1171136.24..1171136.25 rows=1 width=8) (actual time=8139.572..8139.572 rows=1 loops=1)
           Buffers: shared hit=462275 read=197240
           ->  HashAggregate  (cost=1171052.40..1171089.66 rows=3726 width=12) (actual time=8096.512..8128.965 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=462275 read=197240
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=47493.75..1148647.34 rows=2240506 width=12) (actual time=1634.182..6301.561 rows=2245476 loops=1)
                       Recheck Cond: ((l_shipdate >= '1997-09-01'::date) AND (l_shipdate < '1997-11-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=653382
                       Buffers: shared hit=462275 read=197240
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46933.62 rows=2240506 width=0) (actual time=1266.520..1266.520 rows=2247772 loops=1)
                             Index Cond: ((l_shipdate >= '1997-09-01'::date) AND (l_shipdate < '1997-11-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6133
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.029..11.665 rows=29990 loops=1)
         Buffers: shared hit=830
   ->  Sort  (cost=1188161.05..1188170.36 rows=3726 width=12) (actual time=15703.008..15703.010 rows=1 loops=1)
         Sort Key: revenue10.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=1029177 read=289853 dirtied=201 written=8
         ->  Subquery Scan on revenue10  (cost=1187856.20..1187940.03 rows=3726 width=12) (actual time=15693.407..15702.981 rows=1 loops=1)
               Buffers: shared hit=1029177 read=289853 dirtied=201 written=8
               ->  HashAggregate  (cost=1187856.20..1187902.77 rows=3726 width=12) (actual time=15693.405..15702.977 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=1029177 read=289853 dirtied=201 written=8
                     ->  Bitmap Heap Scan on lineitem  (cost=47493.75..1148647.34 rows=2240506 width=12) (actual time=1223.298..5761.116 rows=2245476 loops=1)
                           Recheck Cond: ((l_shipdate >= '1997-09-01'::date) AND (l_shipdate < '1997-11-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=653382
                           Buffers: shared hit=566902 read=92613 dirtied=201 written=8
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46933.62 rows=2240506 width=0) (actual time=960.973..960.973 rows=2247772 loops=1)
                                 Index Cond: ((l_shipdate >= '1997-09-01'::date) AND (l_shipdate < '1997-11-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=1 read=6132
 Planning time: 2.628 ms
 Execution time: 15725.758 ms
(38 rows)

drop view revenue10;
DROP VIEW
COMMIT;
COMMIT