Discoverer query a logical standby rather than production via db link

Hello,
I have read in some oracle documentation that oracle does not support discoverer on a logical standby database because the EUL tables need write access. So oracle recommends having the EUL tables on a write enabled database (Production) and then link to data on a logical standby.
Is anyone doing something like this currently? I am curious how this would be configured? And is it worth it?
Thanks

Hi Olivier
You need to point your EUL folders at the other database using a database link. Then whenever Discoverer sees that folder it will call the database link and the data will come from the other database.
Therefore, you need to have a schema on the other database that has SELECT permissions on all of the objects that you want to query. After satisfying yourself that you have such a schema, on the local database you create a database link to the other database using the schema that has the permissions. In order to create the database link your will of course need to be logged on locally using an account that has permission to create such a link and you will need to know the password of the schema in the other database.
If you don't create a PUBLIC database link you will also need to make sure that your EUL owner and all of your users can access it. More often than not I will use a PUBLIC database link which saves all the trouble.
Here is a script for a PUBLIC database link. The link is called LOCAL_TO_STANDBY and as you can see the user I am connecting as is called APPS with a password of STANDBY_APPS (entered in the IDENTIFIED BY section):
CREATE PUBLIC DATABASE LINK LOCAL_TO_STANDBY
CONNECT TO APPS
IDENTIFIED BY STANDBY_APPS
USING '(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.10.20)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = STANDBY) ) )';
You will of course have to change your database connection information by altering the IP address or the host or replacing this with a fully qualified domain name, you then have to provide the PORT and the SERVICE_NAME for the database you will be connecting to.
To test the connection, try this:
SELECT FROM DUAL@LOCAL_TO_STANDBY;
Does this help?
Best wishes
Michael

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user12219815 wrote:
Hi ,
We have one logical standby database is running for our production database .
Now business require one more logical standby for reporting purpose
so during step for creating new logical standby we need to run
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so is this will impact exsiting logical standby ? or we don't run this time this statemnet ?
Thanks
Gauravno need to execute.

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Edited by: 825766 on Jun 23, 2011 1:20 PM
Edited by: 825766 on Jun 23, 2011 1:44 PM

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Discoverer query a logical standby rather than production via db link

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