Microsoft KB Archive/172160

Knowledge Base

ACC97: One Linked Table Opened Read-Only Makes All Read-Only

Article ID: 172160

Article Last Modified on 1/20/2007

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APPLIES TO

• Microsoft Access 97 Standard Edition

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This article was previously published under Q172160

Moderate: Requires basic macro, coding, and interoperability skills.

SYMPTOMS

When you open a linked table as read-only with the OpenRecordset method in code, all linked tables in that database are read-only until the recordset is closed.

RESOLUTION

You can either open linked tables read-write instead of read-only, or you can create a global recordset variable and run the following code when the database opens:

   Dim rsGlobal As Recordset

   Function InitializeLinkTables()

      Dim mydb As Database
      Set mydb = CurrentDb
      Set rsGlobal = mydb.OpenRecordset("select * from Shippers")

   End Function
                

STATUS

Microsoft has confirmed this to be a problem in Microsoft Access 97.

This problem no longer occurs in Microsoft Jet Database Engine version 3.51, which is available from the Microsoft Download Center.

For information on how to obtain Microsoft Jet Database Engine 3.51, please see the following article in the Microsoft Knowledge Base:

172733 ACC97: Updated Version of Microsoft Jet 3.5 Available for Download

MORE INFORMATION

When you open a recordset against a linked table, Microsoft Access caches a Table object with the properties of the first linked table you specify. When you open additional linked tables, they are opened with the cached information. If the first linked table is opened as read-only, all additional linked tables opened are opened as read-only.

Steps to Reproduce Problem

NOTE: There may be other steps that exhibit this behavior. The following steps outline just one known way of duplicating this problem.

1. Create a new database.
2. Create a linked table to the Suppliers table in the sample database Northwind.mdb.
3. Create a linked table to the Shippers table in the sample database Northwind.mdb.

4. Add the following code to a new module:
   

         Function TestReadOnly()
   
            Dim dbTest As Database
            Dim rsTest As Recordset
            Set dbTest = CurrentDb
            Set rsTest = dbTest.OpenRecordset("Select * From Shippers", _
                         dbOpenDynaset, dbReadOnly)
            Stop
            rsTest.Close
   
         End Function
                           

5. Open the Debug window, type the following line, and then press ENTER:
   
   ?TestReadOnly
   
   NOTE: The code will pause on the Stop line in the code.
6. From the Database window, open the Shippers table and note that you cannot modify any data as expected.
7. From the Database window, open the Suppliers table and try to change the Company Name of any supplier.
   
   RESULT: The Suppliers table is read-only as described in the "Symptoms" section.
8. Return to the Module window and press F5 to resume running the code.
9. From the Database window, open the Suppliers table and try to change the Company Name of any supplier.
   
   RESULT: You can now modify data appropriately.

Keywords: kbbug kbhowto kbprogramming KB172160

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