Database link with current_user

Question

I'm logged on database EMSDB.D710.DE and created a database link to EMSDB.D999.DE with current_user(...same user, same credentials I'm logged in). When I tried to use that created link I get the errorcode:"ORA-01017: Benutzername/Kennwort ungültig; Anmeldung abgelehnt". What I don't understand is, why I can connect to EMSDB.D999.DE --- but not access to the same database with a database link???
SELECT     'EMSDB.D999.DE'               REMOTE_DB   --NAME OF DATABASE 
FROM DUAL;
VARIABLE VAR_REMOTE_DB VARCHAR2(15);
BEGIN
    :VAR_REMOTE_DB := '&REMOTE_DB';
END;
SELECT  :VAR_REMOTE_DB                REMOTE_DB    
FROM DUAL;
CREATE DATABASE LINK &REMOTE_DB CONNECT TO CURRENT_USER USING '&REMOTE_DB' ;
SELECT TABLE_NAME FROM ALL_TABLES@&REMOTE_DB;output
SQL> @test
REMOTE_DB
EMSDB.D999.DE
REMOTE_DB
EMSDB.D999.DE
SELECT TABLE_NAME FROM [email protected]
FEHLER in Zeile 1:
ORA-01017: Benutzername/Kennwort ungültig; Anmeldung abgelehnt
SQL>Edited by: user5116754 on 22.02.2011 04:33

Answer 1

user5116754 wrote:
Thank you, John...but should it be possible for me to create this database link then???
As I said, if you are not a global user according to Oracle, you would need to create a database link supplying the username and password of the user at the remote database that you want to use. Something like:
CREATE DATABASE LINK EMSDB.D999.DE
CONNECT TO username IDENTIFIED BY password
USING 'EMSDB.D999.DE';
How to spy out, what kind of user (GLOBAL...) I am?Log into the local database and do:
SELECT external_name
FROM user_uses;If that return null, then you are not a global user, if it returns a value, you are a global user in that database. Log into the remote database (whatever is identified by emsdb.d999.de) and do the same thing. If the external names on both databases are not null and have the same value, then you are a global user on both databases, and the current_user should work, otherwise you are ethe not a global user on one or both databases, or you are a different global user on the two databases.
John