BEGIN;
BEGIN
create or replace view revenue30 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1996-04-01'
		and l_shipdate < date'1996-04-01' + 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,
	revenue30
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue30
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2383025.51..2388123.79 rows=3805 width=79) (actual time=24687.300..24687.303 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue30.supplier_no)
   Buffers: shared hit=730925 read=598678 dirtied=67 written=5565
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1182745.40..1182745.41 rows=1 width=8) (actual time=11754.065..11754.066 rows=1 loops=1)
           Buffers: shared hit=283830 read=380411 written=309
           ->  HashAggregate  (cost=1182659.79..1182697.84 rows=3805 width=12) (actual time=11690.661..11743.186 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=283830 read=380411 written=309
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=48715.01..1159582.28 rows=2307751 width=12) (actual time=1482.422..8914.716 rows=2244427 loops=1)
                       Recheck Cond: ((l_shipdate >= '1996-04-01'::date) AND (l_shipdate < '1996-06-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=658106
                       Buffers: shared hit=283830 read=380411 written=309
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..48138.08 rows=2307751 width=0) (actual time=1138.859..1138.859 rows=2268788 loops=1)
                             Index Cond: ((l_shipdate >= '1996-04-01'::date) AND (l_shipdate < '1996-06-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6135 written=13
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.039..16.856 rows=40980 loops=1)
         Buffers: shared hit=1121
   ->  Sort  (cost=1200279.81..1200289.32 rows=3805 width=12) (actual time=24666.126..24666.127 rows=1 loops=1)
         Sort Key: revenue30.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=729804 read=598678 dirtied=67 written=5565
         ->  Subquery Scan on revenue30  (cost=1199967.92..1200053.53 rows=3805 width=12) (actual time=24654.229..24666.092 rows=1 loops=1)
               Buffers: shared hit=729804 read=598678 dirtied=67 written=5565
               ->  HashAggregate  (cost=1199967.92..1200015.48 rows=3805 width=12) (actual time=24654.227..24666.086 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=729804 read=598678 dirtied=67 written=5565
                     ->  Bitmap Heap Scan on lineitem  (cost=48715.01..1159582.28 rows=2307751 width=12) (actual time=1932.254..9386.246 rows=2244427 loops=1)
                           Recheck Cond: ((l_shipdate >= '1996-04-01'::date) AND (l_shipdate < '1996-06-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=658106
                           Buffers: shared hit=445974 read=218267 dirtied=67 written=5256
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..48138.08 rows=2307751 width=0) (actual time=1496.236..1496.236 rows=2267272 loops=1)
                                 Index Cond: ((l_shipdate >= '1996-04-01'::date) AND (l_shipdate < '1996-06-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=428 read=5707 written=244
 Planning time: 3.367 ms
 Execution time: 24704.372 ms
(38 rows)

drop view revenue30;
DROP VIEW
COMMIT;
COMMIT