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BUG: Slower performance on linked tables in Access 2000

This article was previously published under Q261000
This article has been archived. It is offered "as is" and will no longer be updated.
For a Microsoft Access 2002 and later version of this article, see 275085.
Moderate: Requires basic macro, coding, and interoperability skills.

This article applies only to a Microsoft Access database (.mdb).

You may notice that linked tables in your database have slower performance when you open tables, or that performing updates takes longer than you expect.

You may notice this behavior after you convert the database from an earlier version of Microsoft Access, although this is not the only case in which these symptoms may occur.
The database has many linked tables that also have many relationships, and the table that you are opening has its Subdatasheet Name property set to [Auto]. This can make the table slow to open. Subdatasheets are a new feature in Access 2000. Therefore, you are more likely to notice this behavior after you convert a database from an earlier version.
To work around this behavior, set the Subdatasheet Name property on each table in the back-end database to [NONE]. You can do this manually or by using code.

Setting the Subdatasheet Name property manually

To set the Subdatasheet Name property manually, follow these steps:
  1. In the back-end database, open a table in Design view.
  2. On the View menu, click Properties.
  3. Set the Subdatasheet Name property to [NONE].
  4. Save and then close the table.

Setting the property for all tables by using code

You can use a Visual Basic for Applications function to automatically set the Subdatasheet Name property for all nonsystem tables in a database to [NONE]. To do this, follow these steps:
  1. Open the back-end database.
  2. On the Database window, click Modules, and then click New.
  3. On the Tools menu, click References. Make sure the Microsoft DAO 3.6 Object Library check box is selected, and then click OK.
  4. Type or paste the following code in the new module.
    Sub TurnOffSubDataSheets()Dim MyDB As DAO.DatabaseDim MyProperty As DAO.PropertyDim propName As String, propVal As String, rplpropValue As StringDim propType As Integer, i As IntegerDim intCount As IntegerOn Error GoTo tagErrorSet MyDB = CurrentDbpropName = "SubDataSheetName"propType = 10propVal = "[None]"rplpropValue = "[Auto]"intCount = 0For i = 0 To MyDB.TableDefs.Count - 1    If (MyDB.TableDefs(i).Attributes And dbSystemObject) = 0 Then        If MyDB.TableDefs(i).Properties(propName).Value = rplpropValue Then             MyDB.TableDefs(i).Properties(propName).Value = propVal             intCount = intCount + 1        End If    End IftagFromErrorHandling:Next iMyDB.CloseIf intCount > 0 Then    MsgBox "The " & propName & " value for " & intCount & " non-system tables has been updated to " & propVal & "."End IfExit SubtagError:If Err.Number = 3270 Then    Set MyProperty = MyDB.TableDefs(i).CreateProperty(propName)    MyProperty.Type = propType    MyProperty.Value = propVal    MyDB.TableDefs(i).Properties.Append MyProperty    intCount = intCount + 1    Resume tagFromErrorHandlingElse    MsgBox Err.Description & vbCrLf & vbCrLf & " in TurnOffSubDataSheets routine."End IfEnd Sub
  5. In the Immediate window, type the following text, and then press ENTER to run the function:
    Note that after a short time, if all the tables are not already updated, you receive a message box that tells you that the SubDataSheetName property for <NumberOfTablesUpdated> non-system tables has been updated to [NONE].
Microsoft provides programming examples for illustration only, without warranty either expressed or implied. This includes, but is not limited to, the implied warranties of merchantability or fitness for a particular purpose. This article assumes that you are familiar with the programming language that is being demonstrated and with the tools that are used to create and to debug procedures. Microsoft support engineers can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific requirements.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
prb pra converted linked upgraded SubdatasheetName subdata sheet

Article ID: 261000 - Last Review: 12/05/2015 19:58:33 - Revision: 5.0

Microsoft Access 2000 Standard Edition

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