DOCUMENT:Q132399  06-MAY-2001  [visualc]
TITLE   :SQLGetData() Returns SQL_NO_TOTAL in RFX_LongBinary()
PRODUCT :Microsoft C Compiler
PROD/VER:winnt:2.1,4.0
OPER/SYS:
KEYWORDS:kbfile kbprogramming kbDatabase kbMFC kbODBC kbVC

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The information in this article applies to:

 - The Microsoft Foundation Classes (MFC), used with:
    - Microsoft Visual C++ for Windows, 16-bit edition, version 1.52 
    - Microsoft Visual C++, 32-bit Editions, versions 2.1, 4.0 
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SUMMARY
=======

An assertion may occur in RFX_LongBinary() if an ODBC driver returns a value of
SQL_NO_TOTAL (-4) in the location pointed to by plLength after calling
SQLGetData(). The MFC RFX_LongBinary() function assumes that an ODBC driver
won't return SQL_NO_TOTAL from SQLGetData(). This is by design. If you must use
RFX_LongBinary() to map a binary field to a CLongBinary variable, use the
RFX_LongBinary() function in BLOBRFX.EXE. BLOBRFX.EXE, a self-extracting file,
contains two files: BLOBRFX.CPP and BLOBRFX.H. BLOBRFX.CPP contains an
RFX_LongBinary2() function, which can be used in place of RFX_LongBinary() in
your CRecordset's DoFieldExchange() function. BLOBRFX.H contains the prototype
for the RFX_LongBinary2() function.

Blobrfx.exe

For additional information about how to download Microsoft Support files, click
the article number below to view the article in the Microsoft Knowledge Base:

   Q119591 How to Obtain Microsoft Support Files from Online Services

Microsoft used the most current virus detection software available on the date of
posting to scan this file for viruses. Once posted, the file is housed on secure
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NOTE: If you are using a precompiled header in your project, you may want to add
the following line of code to the top of BLOBRFX.CPP:

      #include "stdafx.h"

This behavior is by design. This problem was corrected in Visual C++ version 4.2
and above.

MORE INFORMATION
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REFERENCES
==========

The ODBC Programmer's Reference in the Visual C++ Online Books provides
information about SQLGetData().

Additional query words: Oracle

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Keywords          : kbfile kbprogramming kbDatabase kbMFC kbODBC kbVC 
Technology        : kbAudDeveloper kbMFC
Version           : winnt:2.1,4.0
Issue type        : kbprb
Solution Type     : kbfix

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