RE: Resolving dblinks

Here's the chain of events:

Client SQLPlus logs in using client's TNS settings (TNS_Admin to = client's
TNSNAMES.ORA)
Client then uses a db link:

   Database must already have database link created    Database open new connection specified by db link by using database server's TNSNames.ora

In other words, since the database link is being opened by the database server, only the TNS settings on the server itself are important; the database cannot see what TNS environment the SQLPlus client is running = under.

...Rudy

-----Original Message-----
From: oracle-l-bounce_at_freelists.org =
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Rusnak, George A. (SEC-Lee) CTR Sent: Tuesday, May 24, 2005 11:08 AM
To: oracle-l_at_freelists.org
Subject: Resolving dblinks

One of our databases was started with TNS_ADMIN set to a directory where there was no TNSNAMES.ORA file. Now, when a remote user starts an = Sqlplus
session and attempts to use a synonym using a dblink, the result is 'ORA-12154: TNS:could not resolve service name'. When I am logged on the host and start an Sqlplus session and use the = same
synonym, the query works.

How is the database link resolved when running on the host as opposed to = a
session started from a remote user????=20

Thank you in advance !!!

Al Rusnak
Oracle Certified Professional
DBA - Computer Operations

• 804-734-8210
• george.rusnak_at_deca.mil

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