Specify Connection string once for multiple pass-through queries

If you open a connection to the database using that connection string and keep it open during the calls of the queries, you should not need to re-specify the connection string for each query.

/gustav

Not sure if it works in Oracle or not but I have AS400 that I do pass through to and I have created a ODBC conection on each computer that runs the DB. Then when I make my query I do this

        strConnect = "ODBC;DSN=AS400 ODBC"
    Set qdf = dbs.CreateQueryDef("PTBROKERAGEORDERINFO")
        qdf.Connect = strConnect

Of course there is quite a bit more code but check out the strConnect. That is the key.

I did some searching here before posting the Q.  I've tried the following

create a function that returns the connection string
Public Function GetConnectString() As String
On Error GoTo Err_GetConnectString

    Dim strConString As String
   
    strConString = "ODBC;Driver={Microsoft ODBC for Oracle};UID=XXXXX;PWD=XXXXXX;SERVER=TheOracleDB;"
   
    GetConnectString = strConString
   
Exit_GetConnectString:
    Exit Function
   
Err_GetConnectString:
    MsgBox Err.Number & ", " & Err.Description, , "Error"
    Resume Exit_GetConnectString
   
End Function


establish a connection to the back-end
Public Sub PingDatabase()   ' Ping the back end so that the application caches the connect string and won't ask again.

    Dim db As Database

    Set db = OpenDatabase("", False, True, GetConnectString)
    DoCmd.Beep  ' Ping!
   
End Sub



in my pass-through query I then changed the ODBC Connect Str property to
ODBC;Driver={Microsoft ODBC for Oracle};SERVER=TheOracleDB;


I called the public sub to establish the connection.  I then attempted to open the pass-through query but received a prompt for username and pwd

OM Gang

UniqueData - I've been using a DSN and it does work.  The problem is the DSN needs to be established on each machine.  I'd like to switch to DSNless connection but am looking for a method that allows me to stipulate the connection string once so I don't have to change the ODBC Connect Str property for each of the pass-through queries.
OM Gang

The Q where I found the example to 'ping' the db suggested this was enough to establish a connection that Access would then cache.  It appears to not work unless I am doing something wrong.  I was hoping that I was missing something.

<<Or create a static or public/global connection variable to hold the connection while the queries run.>>
you mean something like????
Public pDB as Database

Public Sub PingDatabase()   ' Ping the back end so that the application caches the connect string and won't ask again.

    Dim db As Database

    Set db = OpenDatabase("", False, True, GetConnectString)
    Set pDB = db
    'DoCmd.Beep  ' Ping!
   
End Sub

OM Gang

Yes:

Public pDB as Database

Public Sub PingDatabase()  
    Set pDB = OpenDatabase("", False, True, GetConnectString)
    DoCmd.Beep  ' Ping!
End Sub

  ' Run queries.

  pDB.Close
  Set pDB = Nothing

But I think I would prefer a method like that suggested by Jim.

/gustav

cactus data, I didn't try that method as I liked jmoss111' suggestion as well.  It works just fine and does exactly what I want it to.
Thanks to you both.
OM Gang

You are welcome!

/gustav

You're welcome omgang!

Jim