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Q141716: PRB: Oracle Driver Does Not Support Dynasets

Article: Q141716
Product(s): Microsoft C Compiler
Version(s): 4.0
Operating System(s): 
Keyword(s): kb3rdparty kbinterop kbprogramming kbDatabase kbMFC kbODBC kbVC
Last Modified: 30-JUL-2001

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The information in this article applies to:

- Microsoft Visual C++, version 4.0 
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SYMPTOMS
========

When using the 32-bit ODBC driver for Oracle that is distributed with Visual C++
4.0, you may see the following message in your debug output window:

  

  Warning: SQLExtendedFetch not supported by driver
  and/or cursor library not loaded. Opening forwardOnly.

You may also experience an unhandled exception accompanied by the following
messages in your debug output window:

  

  Error: failure updating record

  Function sequence error
  State:S1010,Native:0,Origin:[Microsoft][ODBC Driver Manager]

  First-chance exception in MyExe.exe (MFCD40D.DLL): 0xE06D7363:
  Microsoft C++ Exception

  Recordset is read-only

  First-chance exception in MyExe.exe (MFCD40D.DLL): 0xE06D7363:
  Microsoft C++ Exception

CAUSE
=====

You are attempting to open and use a CRecordset object as a dynaset.

The driver does not support the ODBC API function SQLExtendedFetch.
SQLExtendedFetch is required by SQLSetPos and SQLSetPos is required to provide
dynasets.

CRecordset::OnSetOptions() queries the driver to see if SQLExtendedFetch is
available. When it finds that SQLExtendedFetch isn't available, it opens the
recordset as forwardonly. This generates the first warning message.

The last two error messages listed occur when you call CRecordset::Edit() to edit
a record.

The rest of the error messages occur when you call CRecordset::AddNew() and
CRecordset::Update to add a record.

RESOLUTION
==========

You can use snapshots to create a scrollable, updatable recordset. The ODBC
Cursor Library is loaded when using snapshots, which provides the functionality
needed for a scrollable, updatable recordset.

MORE INFORMATION
================

The driver in question isL

File Name: VSORAC32.DLL Version: 1.03.009

To verify the driver version info:

1. Open the ODBC Administator.

2. Click the Drivers button.

3. Highlight the Oracle driver in the Installed ODBC Drivers list box.

4. Click the About button

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Keywords          : kb3rdparty kbinterop kbprogramming kbDatabase kbMFC kbODBC kbVC 
Technology        : kbVCsearch kbVC400 kbAudDeveloper
Version           : 4.0
Issue type        : kbprb

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