Consider the following scenario:

• You change the binding order of two similarly-named output parameters from a stored procedure in an application.
• The application uses the Microsoft Data Access Components (MDAC) 2.8 Service Pack 1 (SP1) ODBC driver.
• The application is running on a Microsoft Windows XP with Service Pack 2 (SP2)-based computer.

In this scenario, incorrect data is returned.

For example, assume that you have a stored procedure that returns parameter values that are named @a1 and @a. In the application that uses the ODBC driver, you bind to @a first and then bind to @a1. In this scenario, the values are returned correctly. However, if you bind to @a1 first and then bind to @a, the parameter values are returned incorrectly.

Note If the shorter of the parameter names is not contained in the other parameter name, the parameter values are always returned correctly. For example, the parameter values are returned correctly if you use @a and @b or if you use @a1 and @a2.

This problem occurs because there is an incorrect comparison of parameter names in the Microsoft SQL Server ODBC driver and in the SQL OLE DB provider.

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

You must apply MDAC 2.8 SP1 and Windows XP SP2, before you apply this hotfix.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

To work around this problem, rename the parameters so that one parameter name is not contained inside the other parameter name.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

For more information, click the following article number to view the article in the Microsoft Knowledge Base: For more information about MDAC, visit the following Microsoft Developer Network (MSDN) Web site:For more information about Windows XP SP2, visit the following Microsoft Web site: