ADODB connection with SQL2000SP3

[liorh]

my code is using ADODB connection to connect to SQL (Virtual) Server.

the way it being done is (c++):

ADODB::_Connect ionPtr m_dbConn;
ADODB::_Records etPtr m_dbRst;
m_dbConn.Create Instance(__uuid of(ADODB::Conne ction));
m_dbRst.CreateI nstance( __uuidof( ADODB::Recordse t ));
m_dbConn->ConnectionStri ng=( L"DSN=mydsn" );
m_dbConn->Open("","sa"," ",-1);

lately after installing SP3 over SQL2000, it was impossible to connect
- the error message showed: login failed for user 'null)'. reason: not
associated with a trusted sql server connection.

so i changed the connection string to:
m_dbConn-> ConnectionStrin g =(L"DSN=mydsn; UID=sa; PWD=;");
m_dbConn->Open("",""," ",-1);

and now it works !!

what is the reason for that ?
what in sql SP3 interrupt for this kind of connection ?
what is the difference ?

[Erland Sommarskog]

Re: ADODB connection with SQL2000SP3

liorh (liorhal@gmail. com) writes:[color=blue]
> my code is using ADODB connection to connect to SQL (Virtual) Server.
>
> the way it being done is (c++):
>
> ADODB::_Connect ionPtr m_dbConn;
> ADODB::_Records etPtr m_dbRst;
> m_dbConn.Create Instance(__uuid of(ADODB::Conne ction));
> m_dbRst.CreateI nstance( __uuidof( ADODB::Recordse t ));
> m_dbConn->ConnectionStri ng=( L"DSN=mydsn" );
> m_dbConn->Open("","sa"," ",-1);
>
> lately after installing SP3 over SQL2000, it was impossible to connect
> - the error message showed: login failed for user 'null)'. reason: not
> associated with a trusted sql server connection.
>
> so i changed the connection string to:
> m_dbConn-> ConnectionStrin g =(L"DSN=mydsn; UID=sa; PWD=;");
> m_dbConn->Open("",""," ",-1);
>
> and now it works !!
>
> what is the reason for that ?
> what in sql SP3 interrupt for this kind of connection ?
> what is the difference ?[/color]

Since I don't know what is in that DSN, I would have to guess a bit.
Then again, I never liked DSNs. Anyway, my guess is that since SP3
was very focused on security, it may be that since you did not provide
a password, there is now a default for Windows authentication.

Anyway, running a system with a blank password for 'sa' is extremely
poor practice. So is it for that matter, to use sa to connect to SQL
Server from an application.
--
Erland Sommarskog, SQL Server MVP, esquel@sommarsk og.se

Books Online for SQL Server SP3 at

http://www.microsoft.com/sql/techinfo/productdoc/2000/books.asp