PRB: RDO RowsAffected Property Does Not Return Correct Value

ID: Q182958

The information in this article applies to:

Microsoft Visual Basic Enterprise Edition for Windows, versions 4.0, 5.0, 6.0

SYMPTOMS

The RowsAffected property of RDO does not return the correct number of rows affected when using a stored procedure. Instead the RowsAffected property returns a zero or 1.

CAUSE

This behavior occurs when using Microsoft SQL Server driver (SQLSRV32.DLL) version 3.xx. In earlier versions of the SQL Server driver, the RDO RowsAffected property correctly returned the numbers of rows that were affected by the stored procedure.

RESOLUTION

To work around the problem described below, it is necessary to return the @@ROWCOUNT value manually at the end of the stored procedure and change the Visual Basic code so that it captures this value. To do this in the code below, comment out the SQL = "{Call RowsAffectedTest}" line. Then uncomment both the line SQL = "{? = Call RowsAffectedTest}" and the last line of the code. Run the program again to see that the correct number of rows affected is returned by the stored procedure's return value.

STATUS

Microsoft is researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

Steps to Reproduce Behavior

To reproduce this problem you will first need to run the stored procedure given below against the pubs database. Once that has been completed, follow the steps under Visual Basic Code.

Stored Procedure:

1. Run the following stored procedure against the Pubs database in

   SQL Server:

      DROP PROCEDURE RowsAffectedTest
      go

      CREATE PROCEDURE RowsAffectedTest

      AS

      UPDATE AUTHORS SET ZIP = '99998'
      RETURN @@ROWCOUNT

      go

Visual Basic Code:

1. Start a new Visual Basic Standard EXE Project. Form1 is created by

   default. Add a reference to Microsoft Remote Data Object 2.0.

2. Add a CommandButton to the default form.

3. Add the following code to the CommandButton's click event. You will

   need to modify the connect string here to point to your SQL Server:

      Dim SQL As String
      Dim cn As rdoConnection
      Dim qd As rdoQuery
      Dim numberchanged As Integer

      Set cn = rdoEnvironments(0).OpenConnection( _
      dsname:="", _
      Prompt:=rdDriverNoPrompt, _
      Connect:="driver={SQL " & _
       "server};server=YourServerName;uid=sa;pwd=;database=pubs")

      'Comment out this line when un-commenting the other
      SQL = "{Call RowsAffectedTest}"

      'Uncomment this line to get the return value
      'SQL = "{? = Call RowsAffectedTest}"

      Set qd = cn.CreateQuery("MyTest", SQL)

      qd.Execute

      Debug.Print "RDO RowsAffected Property Value: " & qd.RowsAffected

      'Uncomment this line to see the returned value
      'Debug.Print "Returned Value From SP: " & qd(0).Value

4. Run the code and look at the RDO RowsAffected value. Note that it does

   not return the correct value.

Additional query words: kbrdo kbVBp400 kbVBp500 kbVBp600 kbdse kbDSupport kbVBp

Technology        : kbrdo
Platform          : WINDOWS
Issue type        : kbprb

Last Reviewed: August 13, 1998