Cannot initialize the data source object of OLE DB

问题:

Having an interesting issue. I'm reading from an excel file on a server via an OpenRowset in Sql2005. I've run the query a number of times without any problems. I've just gone out for a quick meeting and suddenly I get the error "Cannot initialize the data source object of OLE DB provider "MSDASQL" for linked server "(null)""

I've made sure the files are not in use on the server and even deleted them and recopied them over onto the server and still I'm getting the same error.

UPDATE: This only seems to happen if I join two selects from different openrowsets. If I run the queries individually they still work fine. I have done the join before without any issues. Ideas?

回答1:

The problem comes because the Temp folder of the User under which the SQL server service is running isn't accessible under the credentials which the query is running. Try to to set the security of this temp folder with minimal restrictions. The dsn that gets created every time you run an openrowset query then can be recreated without any credentials conflict. This worked for me without any restart requirements.

回答2:

We ended up restarting the database server and that seemed to solve the problem. Maybe the files were getting locked somehow. We'll never know for sure though

回答3:

I had to download and install "Microsoft Access Database Engine 2010 Redistributable" available here.

"The cause of this issue is that there is no 64-bit ODBC text driver installed on your 64-bit Windows server 2003 actually. The 64-bit MSDASQL just provides an OLEDB/ODBC 'bridge' that allows applications built on OLEDB and ADO (which uses OLEDB internally) to access data sources through ODBC drivers." Source

回答4:

/* Linked server between local(Client) SQL server and Remote SQL server 2005*/

USE master
GO
-- To use named parameters: Add linked server in the source (Local machine - eg: MachineName or LocalSeverLoginName)

sp_addlinkedserver 
 @server = N'LnkSrv_RemoteServer_TEST', 
 @srvproduct=N'', -- Leave it blank when its not 'SQL Server'
 @provider=N'SQLNCLI', -- see notes
 @datasrc=N'RemoteServerName', 
 @provstr=N'UID=sa;PWD=sa;'
 --,@catalog = N'MYDATABASE' eg: pubs
GO

/*
 Note: 
  To check provider name use the folling query in the destination server
   Select Provider From sys.servers
*/
----------------------------------------------------------------------------------------------------------
-- Optional
--EXEC sp_addlinkedsrvlogin 'LnkSrv_RemoteServer_TEST', 'true' -- (self is true) -- for LocalSeverLoginName
--GO

-- Remote login
sp_addlinkedsrvlogin
 @rmtsrvname = 'LnkSrv_RemoteServer_TEST',
 @useself = 'False',
 @rmtuser = 'sa',
 @rmtpassword = 'sa'
GO

-- OR
/*
IF the above add linked server login failed then try in the Linked Server (LnkSrv_RemoteServer_TEST) Property 
Select -> Security - > 'For a login not defined in the list above, Connection will:'

Choose - > Be made using this security context
SET Remote login: sa
With password: sa
*/
----------------------------------------------------------------------------------------------------------

-- Test server connection
declare @srvr nvarchar(128), @retval int;
set @srvr = 'LnkSrv_RemoteServer_TEST';
begin try
    exec @retval = sys.sp_testlinkedserver @srvr;
end try
begin catch
    set @retval = sign(@@error);
end catch;
if @retval <> 0
  raiserror('Unable to connect to server. This operation will be tried later!', 16, 2 );

-- OR

BEGIN TRY 
    EXEC sp_testlinkedserver N'LnkSrv_RemoteServer_TEST'; 
END TRY 
BEGIN CATCH 
    PRINT 'Linked Server not available'; 
    RETURN; 
END CATCH 
----------------------------------------------------------------------------------------------------------

-- Get access linked server database
SET xact_abort ON 
GO

BEGIN TRANSACTION
SELECT  *  FROM LnkSrv_RemoteServer_TEST.DBName.dbo.tblName 
COMMIT TRAN
GO

-- OR
SELECT * FROM OPENQUERY(LnkSrv_RemoteServer_TEST, 'SELECT * FROM DBName.dbo.tblName')
GO

-- OR
SELECT * FROM OPENQUERY(LnkSrv_RemoteServer_TEST, 'SELECT * FROM sys.databases Order by name')
GO
----------------------------------------------------------------------------------------------------------

回答5:

This issue happened to me, as well. A combination of enabling the "Allow inprocess" provider option for the OraOLEDB.Oracle provide (SSMS > Server Objects > Linked Servers > Provides > OraOLEDB.Oracle), restarting the SQL Server Windows service and lastly adjusting the permissions on the TNSNAMES.ora file directly.