Recordset Null Value not being detected in null check

help you fix your problem The Str function will specifically check if a Null value is passed in and deal with it accordingly. When you pass in an object it attempts to convert the result of a default method to a String. The result of the default method is not passed into the Str method, but Field object is, so a check for the initial Null will fail. The Str function will continue to check the parameter type for datatypes that it supports when it realizes that it has an object, it will attempt to retrieve the default value. It doesn't re-attempt to deal with the default value as it did with the passed in argument, so the attempt to return a Null as a String will fail. It seems MS didn't expect a default value to be Null or any other invalid value for Str. For instance Str doesn't support an empty string either.

This might help you I'm getting an ADODB Recordset and I need to check the value of a nullable column in ASP Classic. How can I tell whether it's null? AFAIK IsDBNull doesn't exist in ASP Classic, and all the Null testers ask whether the object is null, not its value. , Try this, it should work if you are using MS SQL

IF IsNull(RS("myCol")) = False THEN
  IF RS("myCol") THEN
    Response.Write "myCol is TRUE"
  ELSE
    Response.Write "myCol is False"
  END IF
ELSE
  Response.Write "myCol is NULL"
END IF

IF RS("myCol")<>"" THEN
  IF RS("myCol") THEN
    Response.Write "myCol is TRUE"
  ELSE
    Response.Write "myCol is False"
  END IF
ELSE
  Response.Write "myCol is NULL"
END IF

This might help you In an access application's VBA code there is a function to convert some database fields over to another format. This happens for 2 tables, in code you can tell them appart by the 2 loops, for BOM and ROUTING. This code had poor performance because sometimes 200000+ records passed through it. In order to speed it up I added transactions to it- its 3x as fast now. However, when trying to close the ROUTING recordset, I get an error saying "object invalid or no longer set". Therefor I added 2 checks to it, a not nothing and not null before I attempt to close it. when stepping through with the debugger it passes both checks and then attempts to close the recordset, then goes to ErrorHandler which gives the message. What makes this error extra weird is that it has no problems closing the BOM recordset for the first loop. Code: , You need to close the Recordset before closing the Workspace.

Workspace.CommitTrans

If Not ROUTING Is Nothing Then
    ROUTING.Close
    Set ROUTING= Nothing
End If

Workspace.Close
Set Workspace = Nothing

To fix the issue you can do I pull a large recordset from a MySQL server and I assign a bunch of variables in an Excel VBA routine based on the field position, e.g.: , Use a function like that

Option Explicit

Function rcdString(rcdField As Variant) As String

    If IsNull(rcdField) Then
        rcdString = ""
    Else
        rcdString = rcdField.Value
    End If

End Function

x = rcdString(MyRecordset.Fields(0))

Hope that helps I have solved this issue by removing the mapped class i.e. Record.class and using

Object[] alert = threatList.get(i);