RE: ora 12154

  • From: "Chitale, Hemant Krishnarao" <Hemant.Chitale@xxxxxx>
  • To: <oracle-l@xxxxxxxxxxxxx>
  • Date: Fri, 4 Nov 2011 09:38:39 +0800

Here's how you can use a password with the "@" character :

SQL> create user TEST_AT identified by TEST_@_P;
create user TEST_AT identified by TEST_@_P
ERROR at line 1:
ORA-00911: invalid character

SQL> !oerr ora 911
00911, 00000, "invalid character"
// *Cause: identifiers may not start with any ASCII character other than
//         letters and numbers.  $#_ are also allowed after the first
//         character.  Identifiers enclosed by doublequotes may contain
//         any character other than a doublequote.  Alternative quotes
//         (q'#...#') cannot use spaces, tabs, or carriage returns as
//         delimiters.  For all other contexts, consult the SQL Language
//         Reference Manual.
// *Action:

SQL> create user TEST_AT identified by "TEST_@_P";

User created.

SQL> grant create session to TEST_AT;

Grant succeeded.

SQL> connect TEST_AT/"TEST_@_P";
ORA-12154: TNS:could not resolve the connect identifier specified

Warning: You are no longer connected to ORACLE.

And from a desktop Client connecting with the connection string "@MYNDB" :

SQL*Plus: Release - Production on Fri Nov 4 09:36:06 2011

Copyright (c) 1982, 2007, Oracle.  All Rights Reserved.

Enter user-name: TEST_AT/"TEST_@_P"@MYNDB

Connected to:
Oracle Database 10g Enterprise Edition Release - Production
With the Partitioning, OLAP and Data Mining options


Hemant K Chitale 

-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On 
Behalf Of Hemant K Chitale
Sent: Friday, November 04, 2011 8:46 AM
To: Brian.Zelli@xxxxxxxxxxxxxxx
Cc: Radoulov, Dimitre; oracle-l@xxxxxxxxxxxxx
Subject: RE: ora 12154

That's a known issue.  Oracle doesn't prevent the use of the "@" symbol
when you set the users's password but interprets it as a connection-string
qualifier when you actually attempt to use it.  It then attempt a TNS
lookup with the subsequent characters.
Hemant K Chitale

sent from my smartphone
On 4 Nov 2011 00:39, "Zelli, Brian" <Brian.Zelli@xxxxxxxxxxxxxxx> wrote:

> Yes, the password.....I was trying to be security minded.....
> -----Original Message-----
> From: Radoulov, Dimitre [mailto:cichomitiko@xxxxxxxxx]
> Sent: Thursday, November 03, 2011 12:37 PM
> To: Zelli, Brian
> Cc: 'oracle-l@xxxxxxxxxxxxx'
> Subject: Re: ora 12154
> On 03/11/2011 17:35, Zelli, Brian wrote:
> >
> > Must have been the actual name I gave that userid.  I re-created it with
> a different name and it works.
> Perhaps the previous username contained the @ or the / characters :)
> Regards
> Dimitre

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