FIX: Distributed Query with Oracle Cannot Work with Table Exported by DTS

View products that this article applies to.

This article was previously published under Q248062

BUG #: 56007(SQLBUG_70)

SYMPTOMS

After successfully copying a SQL Server 7.0 table to Oracle using the Microsoft Oracle OLEDB provider, the Data Transformation Services (DTS) wizard reports a success. However, a SQL 7.0 distributed query to Oracle may not find the table.

Back to the top

STATUS

Microsoft has confirmed this to be a problem in SQL Server 7.0. This problem has been corrected in U.S. Service Pack 2 for Microsoft SQL Server 7.0. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

254561 (http://support.microsoft.com/kb/254561/ ) INF: How to Obtain Service Pack 2 for Microsoft SQL Server 7.0 and Microsoft Data Engine (MSDE) 1.0

For more information, contact your primary support provider.

Back to the top

MORE INFORMATION

Steps to Reproduce the Behavior

Use the DTS Export wizard to copy the SQL 7.0 Northwind..Customers table to the Oracle "DEMO"."SQLCust" table using the Microsoft Oracle OLEDB provider. The DTS wizard will work ok and will report success. You can run the DTS Import Wizard to find the same table in Oracle (demo.SQLCust) and copy it back to SQL Server. However, a SQL 7.0 distributed query to Oracle will not find the table.

For example:

EXEC sp_addlinkedserver   'OracleServer',  'Oracle',  'MSDAORA',  'myOracleServer'

EXEC sp_addlinkedsrvlogin 'OracleServer', 'FALSE', NULL, 'demo', 'demo'

Select * from OracleServer..DEMO.SQLCUST

The preceding query does not work with various combinations of capitalization. It returns the following error:

Server: Msg 7314, Level 16, State 1, Line 1
OLE DB provider 'MSDAORA' does not contain table '"DEMO"."SQLCUST"'.

This code:

SELECT * FROM OPENQUERY(OracleServer, 'SELECT * FROM demo.SQLCust')

displays this error:

Server: Msg 7321, Level 16, State 2, Line 1
An error occurred while preparing a query for execution against OLE DB provider 'MSDAORA'.
[OLE/DB provider returned message: ORA-00942: table or view does not exist

sp_tables_ex OracleServer lists the table as SQLCust with TABLE_SCHEM = DEMO After applying the fix, since the DTS wizard creates the table in Oracle using quotes on the names so that it's mixed-case, users will need to access the table with an exact table name:

Select * from OracleServer..DEMO.SQLCust

When using SQL linked Server queries with a four part name to access mixed-case tables in Oracle (created without using quotes), users will need to access it using upper case letters, from SQL Server, such as:

  Select * from OracleServer..DEMO.SQLCUST

Back to the top

REFERENCES

For additional information on SQL Server distributed queries with an Oracle data source, see the SQL 7.0 Books Online topic "OLE DB Provider for Oracle".

For more information, see the following article in the Microsoft Knowledge Base:

240340 (http://support.microsoft.com/kb/240340/EN-US/ ) PRB: SQL Distributed Query with Oracle Causes 'Could not open table' Error

For additional information regarding this problem on SQL Server 2000, see the following article in the Microsoft Knowledge Base:

294459 (http://support.microsoft.com/kb/294459/EN-US/ ) FIX: Can't Use Four-Part Name to Query Oracle Table If Name Contains Lowercase Characters

Back to the top