Comments on: Connecting to Oracle from SQL Server

By: Michael Kaufman

Michael Kaufman — Wed, 07 Dec 2011 21:29:05 +0000

I am connecting a SQL Server to an Oracle 11g sever. When I try to query data from Oracle through the SQL Server I get error messages:

Server: Msg 7354, Level 16, State 1, Line 1
OLE DB provider ‘OraOLEDB.Oracle’ supplied invalid metadata for column ‘DTTM_STAMP_SEC’. The data type is not supported.

and

Server: Msg 7318, Level 16, State 1, Line 1
OLE DB provider ‘MSDASQL’ returned an invalid column definition.

Which message I get depends upon whether I am connecting through the Oracle Provider for OLE DB or the Microsoft OLE DB Provider for ODBC.

Does anyone know what I am doing wrong?

By: dmcmillan

dmcmillan — Mon, 21 Nov 2011 19:29:22 +0000

I have figured out that this has to do with using update with openquery, I just need to figure out the right syntax. Thanks very much.

By: dmcmillan

dmcmillan — Mon, 21 Nov 2011 19:14:04 +0000

Ok, that’s what I thought. Select is working ok, but I’m having trouble getting an update to work. Am getting the following error, but I’m sure the permission is correct for the user I set:

Msg 7357, Level 16, State 2, Line 1
Cannot process the object “update test.employee set email_address = “dmcmillan@mgh.org”
where employee = 888888″. The OLE DB provider “OraOLEDB.Oracle” for linked server “lawtest” indicates that either the object has no columns or the current user does not have permissions on that object.

Thanks very much.

By: Taylor Gerring

Taylor Gerring — Mon, 21 Nov 2011 17:58:11 +0000

@dmcmillan

By selecting “Be made using this security context”, you’re requesting that the credentials used are those ones you’re providing in that dialog box.

If you want the connection to be attempted with the same credentials as you’re logging in, select “Be made using the login’s current security context”, though I find this often doesn’t work, especially with Windows Authentication.

By: dmcmillan

dmcmillan — Mon, 21 Nov 2011 17:46:04 +0000

I set up a link from SQL Server 2008R2 to an Oracle 10g database. Using “be made using this security contex” entered a login name and password.
Do you actually connect to the database as that user? Or are you connected as the user you are logged into SSMS as?
Thatnks very much.

By: Alecsandra

Alecsandra — Mon, 10 Oct 2011 16:36:35 +0000

This is great. It helped me a lot in troubleshooting my issue with the SQL server 2008 to Oracle 9i connection. Thanks!

By: Rando

Rando — Wed, 21 Sep 2011 13:26:43 +0000

Great Info — just set up a linked server at work, and it worked wonderfully.

By: Andrzej

Andrzej — Thu, 25 Aug 2011 11:16:53 +0000

Thank you – it’s just what I needed

By: Jason Puchyr

Jason Puchyr — Tue, 26 Jul 2011 18:36:30 +0000

You can also “by pass” the TNSNames.ora file (essentially a TNSless oracle linked server) by putting the TNSNames entry details as the Data Source.

Linked server: friendly name you want to use for the OracleDB
Server type: other
Provider: Oracle Provider for OLE DB
Product Name: whatever you want
Data source: full tns entry – with brackets ie:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=fakeHost.org)(PORT=234))(CONNECT_DATA=(SERVER=dedicated)(SERVICE_NAME=oraServiceName)))
Provider string: leave blank

(at least this works for me connecting a SQL Server 2008 R2 to an Oracle 11g database using the 11g client (11.2.0.1.0) 64-bit)

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