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Q182958: PRB: RDO RowsAffected Property Does Not Return Correct Value

Article: Q182958
Product(s): Microsoft Visual Basic for Windows
Version(s): 
Operating System(s): 
Keyword(s): kbGrpDSVBDB
Last Modified: 09-JAN-2000

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The information in this article applies to:

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

======================================================================
Keywords          : kbGrpDSVBDB 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB500Search kbVB600Search kbVB500 kbVB600 kbVB400Search kbVB400
Issue type        : kbprb

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