Weird SQL/View Problem

Question

I have the following query which runs quick...
select a.col1
,b.col2
,b.col3
from table1 a
,table2 b
where a.key = b.key
and a.col1 = 77902
order by a.col3;
Now if I create a view based on the above minus the order by and one of the conditions i.e..
create or replace view v_test as
select a.col1
,b.col2
,b.col3
from table1 a
,table2 b
where a.key = b.key;
and now do the following query:
select col1
,col2
,col3
from v_test
where col1 = 77902
order by col3;
The above query takes ages! I cannot understand why it should behave any different to my original query. All I have done is pushed the joins into a view and queried the view with the same condition and order by.
However, if I do a the following it is quick:
select *
from v_test
where col1 = 77902
order by col3;
Any suggestions will be appreciated.
Thanks

Answer 1

What is the database version?
Are the tables analyzed - CBO vs RBO?
What is the tkprof output for each of the three runs?