PRB: Error Messaging Referencing #Temp Table with ADO-SQLOLEDB (235340)



The information in this article applies to:

  • ActiveX Data Objects (ADO) 2.1
  • ActiveX Data Objects (ADO) 2.1 SP1
  • ActiveX Data Objects (ADO) 2.1 SP2
  • ActiveX Data Objects (ADO) 2.5
  • ActiveX Data Objects (ADO) 2.6
  • ActiveX Data Objects (ADO) 2.7
  • Microsoft Visual Basic Learning Edition for Windows 5.0
  • Microsoft Visual Basic Learning Edition for Windows 6.0
  • Microsoft Visual Basic Professional Edition for Windows 5.0
  • Microsoft Visual Basic Professional Edition for Windows 6.0

This article was previously published under Q235340

SYMPTOMS

When you try to create a ADO recordset based on a #Temp table created within a stored procedure called by ADO using the SQLOLEDB provider, you may encounter one of the following error messages:
3704 - The operation requested by the application is not allowed if the object is closed.
-or-
Run-time error '3704': Operation is not allowed when the object is closed.

CAUSE

The SQL Server OLEDB provider (SQLOLEDB) has a new behavior designed to provide more accurate information to the caller about what happened in the procedure. Each SQL statement within a stored procedure returns a "result," either a count of rows affected, or a resultset.

The SQL Server ODBC provider (MSDASQL) does not provide information about the results of individual SQL statements within a stored procedure. The only result that comes back from a stored procedure execution is the result of the SELECT statement if it has one. This is why the problem does not manifest with MSDASQL.

RESOLUTION

To get SQLOLEDB to behave as the SQL ODBC driver did, you must use SET NOCOUNT ON. Put SET NOCOUNT ON in the stored procedure or in the SQL statement used with ADO as shown in the code sample below. Alternatively, you could use MSDASQL.

STATUS

This behavior is by design.

MORE INFORMATION

To reproduce the error:
  1. Create a new Visual Basic Standard EXE project and paste the following code in the General Declarations section of a Form.
  2. Set a reference to Microsoft ActiveX Data Objects Library.
  3. Change the connection string as necessary for your environment:
    Private Sub Form_Load()
    
    Dim adoCn As adoDb.Connection
    Dim adoRs As adoDb.Recordset
    Dim adoCm As adoDb.Command
    Dim strSQL As String
    
    Set adoCn = New adoDb.Connection
    With adoCn
        .ConnectionString = "Provider=SQLOLEDB;Server=<ServerName>;" & _
                                      "Database=Pubs;Uid=<username>;Pwd=<strong password>"
        '.ConnectionString = "Provider=MSDASQL;Driver={SQL Server};Server=<ServerName>;" & _
                                      "Database=Pubs;Uid=<username>;Pwd=<strong password>"
        .CursorLocation = adUseServer
        .Open
    End With
    
    Set adoCm = New adoDb.Command
    With adoCm
        Set .ActiveConnection = adoCn
        .CommandType = adCmdText
        .CommandText = "if exists (select * from sysobjects " & _
                                "where id = object_id('dbo.spADOTempTest') " & _
                                "and sysstat & 0xf = 4) " & _
                                "drop procedure dbo.spADOTempTest"
        .Execute
        .CommandText = "Create procedure spADOTempTest " & _
                                "as CREATE TABLE #test (field1 VARCHAR(20) NULL) " & _
                                "INSERT INTO #test(field1) SELECT fname FROM Employee " & _
                                "SELECT * FROM #test go"
        .Execute
        .CommandType = adCmdStoredProc
        .CommandText = "spADOTempTest"
        'the default for Prepared statements is false.
        '.Prepared = False
    End With
        
    Set adoRs = New adoDb.Recordset
    With adoRs
        Set .ActiveConnection = adoCn
        .LockType = adLockOptimistic
        .CursorLocation = adUseServer
        .CursorType = adOpenForwardOnly
        'Uncomment the next line with the SQLOLEDB provider to fix the error.
        '.Open "SET NOCOUNT ON"
    End With
    adoRs.Open adoCm, , , , adCmdStoredProc
    
    MsgBox "Recordset returned...", vbOKOnly
    
    While Not adoRs.EOF
        Debug.Print adoRs.Fields(0).Value
        adoRs.MoveNext
    Wend
    
    adoCn.Close
    Set adoCn = Nothing
    Set adoRs = Nothing
    
    End Sub
    					

REFERENCES

SQL Books Online, Temporary Tables

Modification Type:MajorLast Reviewed:11/5/2003
Keywords:kbprb kbStoredProc KB235340