How to write a dynamic SQL in Oracle Portal

Question

Hello
I am running portal on instance C.
I have instance A and B
From instance C I want to run a report where I will select the instance name.
then the when I execute the query must be dynamically generated adn executed.
for example: in the case of instance A;
the query must be
select * from scott.emp@A
in the case of instance B
the query must be
select * from scott.emp@B
I already have database links A and B pointing to instances A and B respectively.
How do I achieve this. Any code samples, suggestions appreciated.
Thanks
Ganesh

Answer 1

Hallo,
I don't understand why you need a database link, if you are already on that instance ?
BUT for your solution : put your database links in a view and select from this view.
In the view you can do something like this :
create or replace view test
(col1, col2, col3)
as
select .., 'A' location
from taba@A
where ...
union
select .., 'C' location
from taba@C
where ...
union
select .., 'B' location
from taba@B
where ...
The only thing you have to do is to give the instance name to the view as the column location.
Good luck.
Filip Huysmans.