BUG: OLE DB AppWizard Generates Wrong SQL Statement (190942)


The information in this article applies to:

  • Microsoft Visual C++, 32-bit Enterprise Edition 6.0
  • Microsoft Visual C++, 32-bit Professional Edition 6.0
  • Microsoft Visual C++, 32-bit Learning Edition 6.0
This article was previously published under Q190942

SYMPTOMS

If an Oracle table name contains spaces in it, the MFC OLE DB AppWizard will generate incorrect SQL Statements. This problem happens when using either the OLE DB Provider for ODBC (using the Microsoft Oracle ODBC Driver) or the OLE DB Provider for Oracle.

When attempting to build the application, the following error is returned:
error C2017: illegal escape sequence

RESOLUTION

The solution is to remove one of the slashes from each part of the SQL Statement. The SQL Statement should resemble the following: 
   "SELECT * FROM PSS.\"my table\""
Although this corrects the SELECT statement, the COLUMN_MAP and Data members for the CMytable class are not created, because of the original syntax problem. The datamembers and COLUMN_MAPs must be manually created. A better solution would be to not use spaces in table names.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. We are researching this bug and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

Steps to Reproduce Behavior

Create a DSN pointing to an Oracle Server. Run the following DDL statement using SQL Plus (Oracle's client query tool): 
   Create table "my table" (fld1 VARCHAR2(10));
   INSERT INTO "my table" VALUES ('Hello');
Start Visual C++ version 6.0.

  1. Create an MFC AppWizard(exe) Project.
  2. Click Next in step 1 of 6.
  3. In step 2 of 6, select "Database view with file support."
  4. Click Data Source.
  5. Select OLE DB, then click "Select OLE DB Datasource."
  6. Choose the OLE DB Provider for ODBC and select the Oracle data source that has been created for this test. User ID and Password need to be filled in.
  7. Click OK on the Database Options dialog box. Then select "my table" from the table list.
  8. Click Finish on step 2 of 6.
NOTE: The SQL SELECT statement is generated incorrectly in the CCommand<CAccessor<CMytable class. The CCommand<CAccessor<CMytable class can be found in the xxxSet.h file, where xxx is the name of your project: 
   "SELECT * FROM PSS.\\"my table\\""
When you attempt to build the application, you will receive error C2017: illegal escape sequence.

After testing this situation, run the following DDL script to remove the table. 
   DROP TABLE "my table";
Modification Type:MajorLast Reviewed:11/18/2003
Keywords:kbBug kbDatabase kbOracle kbpending KB190942
©2003 Microsoft Corporation. All rights reserved.