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Importing Data from Oracle 10g to Sql Server 2005 using Linked Server

Posted By:      Posted Date: September 15, 2010    Points: 0   Category :Sql Server
Hi,   I am using Windows 2003 server and Sqlserver 2005 by the use of Linked server , I made a connection to Oracle 10g after that I am importing records from Oracle to sqlserver 2005. When I made tnsnames.ora in sql machine , it worked fine but when i am using tnsnames file from oracle server then i fiired importing procedure it returns below maintain error :   OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS" returned message "Unspecified error". OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS" returned message "Oracle error occurred, but error message could not be retrieved from Oracle.". Msg 7311, Level 16, State 2, Line 1 Cannot obtain the schema rowset "DBSCHEMA_TABLES" for OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS". The provider supports the interface, but returns a failure code when it is used.   Please let me know.   Thanks

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Dear All,

please to try to help me what could be the problem ?. when  i try to excute my stored proc in my sqlserver management studio it excuting fine when i trying to Excute using Asp.net application it giving Error. iam working on Sql Server, mt linked server is Oracle. my proc is like :

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SQL 2005 Linked Server to Oracle 10g - Very Slow




Anyone have some recommendations for a slow linked server from SQL 2005 to Oracle 10g?


Here is the situation.  We have an application that runs on SQL 2005 - Win 2003, and in certain forms it makes calls to an Oracle 10g database running on Sun Unix.  This database was upgraded from SQL 2000 Win 2000.  We have a test system mirroring production and have the same problems.


- All indexes are being used.

- Server configuration is correct.

- Changed the Oracle 10g driver from the main driver to the Instant Client - much smaller but same result.

- Read an old post about same issue but the person was connecting to 8i so they were using a different driver.

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- We are using the Windows Firewall and all DCOM components are set as Microsoft recommends.  I don't think this is an issue because the test server is not using Windows Firewall and we have the same issue on that server.


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