Q170149: PRB: Recordset Name Property is Limited to 256 Characters

Article: Q170149
Product(s): Microsoft Visual Basic for Windows
Version(s): 
Operating System(s): 
Keyword(s): kbGrpDSVBDB
Last Modified: 11-JAN-2001

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Visual Basic Learning Edition for Windows, versions 5.0, 6.0 
- Microsoft Visual Basic Professional Edition for Windows, versions 5.0, 6.0 
- Microsoft Visual Basic Enterprise Edition for Windows, versions 5.0, 6.0 
- Microsoft Visual Basic Standard Edition, 32-bit, for Windows, version 4.0 
- Microsoft Visual Basic Professional Edition, 16-bit, for Windows, version 4.0 
- Microsoft Visual Basic Professional Edition, 32-bit, for Windows, version 4.0 
- Microsoft Visual Basic Enterprise Edition, 16-bit, for Windows, version 4.0 
- Microsoft Visual Basic Enterprise Edition, 32-bit, for Windows, version 4.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

The Name property of a DAO Recordset object is limited to 256 characters. It
only reports the first 256 characters of the SQL statement used to create the
new Recordset. If the SQL statement is longer than 256 characters, and you
refresh the Data Control in the code later on, you will receive one of the
following errors:

  "Run-time error '3061': Too few parameters. Expected 1."

  "Run-time error '3075': Syntax error in string in query expression 'xxxx'."

CAUSE
=====

When you set the Data Control's Recordset property to an existing Recordset, it
obtains its RecordSource property from the DAO Recordset's Name property, which
allows a maximum length of 256 characters.

RESOLUTION
==========

Store the SQL statement into a string variable. Before refreshing the Data
Control, set its RecordSource Property to this variable. For example:

     Data1.RecordSource = SQLStr
     Data1.Refresh

STATUS
======

This behavior is by design.

MORE INFORMATION
================

Steps to Reproduce Behavior
---------------------------

1. Start a new project in Visual Basic. Form1 is created by default.

2. Add a Data Control(Data1) and a CommandButton (Command1) to Form1.

3. In the Click event of Command1, place the following code:

        Private Sub Command1_Click()
          Dim DB As Database, RS As Recordset
          Dim SQLStr As String

          Set DB = DBEngine.Workspaces(0).OpenDatabase("Biblio.MDB")

          'This SQL Statement cause Run-time error 3075.
          SQLStr = "Select PubID, Name, [Company Name], Address, " _
           & "City, State, PubID, Name, [Company Name], Address, City, " _
           & "State, PubID, Name, [Company Name], Address, City, State, " _
           & "PubID, Name, [Company Name], Address, City, State " _
           & "from Publishers Where PubID = 2 and State = 'MA'"

          'This SQL Statement cause Run-time error 3061.
          'SQLStr = "Select PubID, Name, [Company Name], Address, City, " _
          ' & "State, PubID, Name, [Company Name], Address, City, State, " _
          ' & "PubID, Name, [Company Name], Address, City, State, " _
          ' & "PubID, Name, [Company Name], Address, City, State, " _
          ' & "PubID from Publishers Where PubID = 2 and State = 'MA'"

          Set RS = DB.OpenRecordset(SQLStr, dbOpenDynaset)
          Set Data1.Recordset = RS
          Debug.Print RS.Name
          Debug.Print Data1.RecordSource
          Data1.Refresh

        End Sub

4. Start the program by pressing the F5 key.

5. Click the Command1 button to execute the code. You will receive one of the
  errors listed above.

Additional query words: kbVBp400 kbVBp500 kbVBp600 kbdse kbDSupport kbVBp kbrdo

======================================================================
Keywords          : kbGrpDSVBDB 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB500Search kbVB600Search kbVBA500 kbVBA600 kbVB500 kbVB600 kbVB400Search kbVB400 kbVB16bitSearch
Issue type        : kbprb

=============================================================================