Mass update Linked Tables in Access

Gerhardpet
Gerhardpet used Ask the Experts™
on
I have an Access database that I use to convert data from one ERP to another ERP system. The databases are Pervasive to Postgresql.

I link tables from both databases using ODBC and then have append queries to migrate the data.

My problem is that I take this database to different servers and it is very cumbersome to update the links individually in the linked table manager. How can I mass update the links? In total I link to about 40 tables.
Comment
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®
Top Expert 2013

Commented:
One of the easiest way to do this is by using DSNs for the ODBC connections. I guess you are using DSN-less option for your linked tables. Create two DSNs: pervasiveERP and postgresERP and use them for the linked tables. If you stick to the same DSN names on different machines the linked tables will work
Most Valuable Expert 2015
Distinguished Expert 2018
Commented:
You can use a function like this:
Public Function AttachSqlServer( _
    Optional ByVal Hostname As String, _
    Optional ByVal Database As String, _
    Optional ByVal Username As String, _
    Optional ByVal Password As String) _
    As Boolean

' Attach all tables linked via ODBC to SQL Server.
' 2014-08-09. Cactus Data ApS, CPH.

    Const cstrDbType    As String = "ODBC"
    Const cstrAcPrefix  As String = "dbo_"
    Const cstrConnect   As String = _
        "ODBC;" & _
        "DRIVER=SQL Server;" & _
        "Description=Cactus TimeSag og Finans;" & _
        "APP=Microsoft® Access;" & _
        "SERVER={0};" & _
        "DATABASE={1};" & _
        "UID={2};" & _
        "PWD={3};"

    Dim dbs             As DAO.Database
    Dim tdf             As DAO.TableDef
    Dim strConnect      As String
    Dim strName         As String
    
    On Error GoTo Err_AttachSqlServer
    
    Set dbs = CurrentDb
    strConnect = cstrConnect
    strConnect = Replace(strConnect, "{0}", Hostname)
    strConnect = Replace(strConnect, "{1}", Database)
    strConnect = Replace(strConnect, "{2}", Username)
    strConnect = Replace(strConnect, "{3}", Password)
    
    For Each tdf In dbs.TableDefs
        strName = tdf.Name
        If Asc(strName) <> Asc("~") Then
            If InStr(tdf.Connect, cstrDbType) = 1 Then
                If Left(strName, Len(cstrAcPrefix)) = cstrAcPrefix Then
                    tdf.Name = Mid(strName, Len(cstrAcPrefix) + 1)
                End If
                tdf.Connect = strConnect
                tdf.RefreshLink
                Debug.Print tdf.Name, tdf.SourceTableName, tdf.Connect
            End If
        End If
    Next
    
    AttachSqlServer = True
    
Exit_AttachSqlServer:
    Set tdf = Nothing
    Set dbs = Nothing
    Exit Function
    
Err_AttachSqlServer:
    FejlBox (vbCritical)
    Resume Exit_AttachSqlServer
    
End Function

Open in new window

You have to modify it a little to separate the tables from the two servers in two groups.

/gustav

Author

Commented:
@chaau
Your suggestion works for the pervasive database but not for the postgress. For the postgres database the string also includes the database name.

Like so DSN=erp;database=abc. The database name will always be the company name so that will not work.

@Gustav Brock
I'm going to try yours
Should you be charging more for IT Services?

Do you wonder if your IT business is truly profitable or if you should raise your prices? Learn how to calculate your overhead burden using our free interactive tool and use it to determine the right price for your IT services. Start calculating Now!

Author

Commented:
The Postgres database connection string looks like this
database connection string
Most Valuable Expert 2015
Distinguished Expert 2018
Commented:
The only thing you may need to change is SERVER=localhost where localhost should be replaced with the hostname or IP address of the other server.

The generic string is:
Driver={PostgreSQL};Server=IP address;Port=5432;Database=myDataBase;Uid=myUsername;Pwd=myPassword;

/gustav

Author

Commented:
Got it! That works...Thanks for your help @gustav
Most Valuable Expert 2015
Distinguished Expert 2018

Commented:
You are welcome!

/gustav

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start 7-Day Free Trial