FIX: Problem Assigning ADO Recordset Numeric Fields to Another Field (247029)

SYMPTOMS

Using MDAC 2.1 SP2 (build 2.1.2.4202.3) or earlier, when attempting to assign an ADO recordset field with Numeric data type to a second recordset field (for example, rs2!K2 = rs1!K1), the following error appears:

Run-time error '-2147217887 (80040e21)':
Error occurred.

This problem is observed when client side cursor is specified (adUseClient).

RESOLUTION

There are three ways to work around this problem:

Use Server-side cursor (adUseServer).
Assign field value to a variable, and then assign the variable to the field of the second recordset, such as:
```
myVar = rs1!K1
rs2!K2 = myVar
					
```
Use the .Value property of the Column object, such as:
```
rs2("K2").Value = rs1("K1").Value
					
```

STATUS

Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.

This bug was corrected in Microsoft Data Access Components version 2.5 or later. You can obtain the latest version of Microsoft Data Access Components form the following Microsoft Web site:

http://msdn.microsoft.com/library/default.asp?url=/downloads/list/dataaccess.asp

MORE INFORMATION

Steps to Reproduce Behavior

Start a new Standard EXE project in Visual Basic. Form1 is created by default. Make a reference to the Microsoft ActiveX Data Objects 2.1 Library.

Double-click Form1. Copy and paste the following code under the Form_Load() event:

    Dim cn As New ADODB.Connection
    Dim rs1 As New ADODB.Recordset
    Dim rs2 As New ADODB.Recordset
        
    With cn
      .ConnectionString = "Provider=MSDASQL;Driver={SQL Server};UID=xxx;PWD=xxx;Server=MyServer;Database=Pubs;"
       .CursorLocation = adUseClient
       .Open
    End With
    
    On Error Resume Next
    cn.Execute "Drop Table T1"
    cn.Execute "Drop Table T2"
    On Error GoTo 0
    
    cn.Execute "Create Table T1 (K1 Numeric Primary Key)"
    cn.Execute "Create Table T2 (K2 Numeric Primary Key)"
    cn.Execute "Insert Into T1 Values (1)"
    cn.Execute "Insert Into T2 Values (1)"
    
    rs1.Open "SELECT * FROM T1", cn, adOpenKeyset, adLockOptimistic
    rs2.Open "SELECT * FROM T2", cn, adOpenKeyset, adLockOptimistic

    rs2!K2 = rs1!K1
    rs2.Update
    
    rs1.Close
    rs2.Close
    cn.Close

REFERENCES

For additional information about MDAC release history, click the article number below to view the article in the Microsoft Knowledge Base:

231943 NFO: Microsoft Data Access Components (MDAC) Release History