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Stored Procedure Return w/RDO/Oracle/VB4

Posted on 1997-06-15
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Last Modified: 2012-06-27
I am using VB4 with Oracle and RDO data access.  I need to make an Oracle stored procedure call from an RDO object and return either return codes or rows from a table.  This is not documented very well and I am more of a DBA than a VB programmer.  I tried using the rdoPreparedStatement and seem to get close but that's it.  The particular procedure I am calling has an OUT parameter with no IN parameters but I need something generic enough to call functions or procedures in Oracle with any number of parameters.  Thanks.
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Question by:rengland
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tward earned 100 total points
ID: 1427293
I am using Oracles Objects for OLE which seems to work well.

You use objects and basically open Dynasets with a query by which you can movenext, moveprevious through the sets returned.

Below is some sample code that I use all the time to do database stuff with Oracle:

  Option Explicit

  ' Oracle setup '
  Public OraSession As Object
  Public oraDatabase As Object

  ' Oracle Connect String (Used in DatabaseOpen) '
  Public CONNECT$

  ' Oracle Database String (Used in DatabaseOpen) '
  Public DATABASE$

  ' Oracle SQL String (Used in OpenDynaset) '
  Public SQL$

  Public DynaSetOpenError As Boolean
'''''''''''''''''''''''''''''''''''''''''''''''''''
'    Function:  DatabaseOpen(CONNECT$,DATABASE$)  '
'                                                 '
' Description:  Opens the Database Passed to it   '
'               in DATABASE using the             '
'               NAME/PASSWORD in CONNECT.         '
'                                                 '
'       Input:   CONNECT$ - "NAME/PASSWORD"       '
'               DATABASE$ - "X:ORA_DB_SRV:ORCL"   '
'                           "PROD"                '
'                                                 '
'      Output:  Message Box on Error, otherwise   '
'               an Open Database Object.          '
'                                                 '
'     Returns:   True = Database was Opened.      '
'               False = Database Open Failed.     '
'                                                 '
'''''''''''''''''''''''''''''''''''''''''''''''''''
Public Function DatabaseOpen(ByVal CONNECT$, ByVal DATABASE$) As Boolean
 
  DatabaseOpen = True
 
  ' Setup The Oracle Session '
  On Error Resume Next
  Set OraSession = CreateObject("oracleinprocserver.xorasession")
  If Err.Number <> 0 Then
   
    MsgBox "Oracle Error:  " & Err.Description, vbOKOnly + vbCritical, "Database Session Error..."
    DatabaseOpen = False
    On Error GoTo 0
    Exit Function
   
  End If
 
  ' Setup The Oracle Connection '
  On Error Resume Next
  Set oraDatabase = OraSession.dbopendatabase(DATABASE$, CONNECT$, 0&)
 
  If Err.Number <> 0 Then
   
    MsgBox "Oracle Error:  " & Err.Description, vbOKOnly + vbCritical, "Database Connection Error..."
    DatabaseOpen = False
   
  End If
 
  On Error GoTo 0
 
End Function

'''''''''''''''''''''''''''''''''''''''''''''''''''
'    Function:  OpenDynaset(SQL$)                 '
'                                                 '
' Description:  Opens a Dynaset using the SQL$    '
'               SQL Statement passed to it.       '
'                                                 '
'       Input:  SQL$ - Any valid SQL Statement.   '
'                                                 '
'      Output:  An Open Dynaset, Use CloseDynaset '
'               to Close Dynasets.                '
'                                                 '
'     Returns:  The OpenDynaset Object.           '
'                                                 '
'''''''''''''''''''''''''''''''''''''''''''''''''''
Public Function OpenDynaSet(ByVal SQL$) As Object
 
  On Error Resume Next
 
  DynaSetOpenError = False
 
  Set OpenDynaSet = oraDatabase.DBCREATEDYNASET(SQL$, 0&)
 
  If Err.Number <> 0 Then
 
    Call MsgBox("Error #" & Err.Number & ":  " & Err.Description, vbCritical + vbOKOnly, "SQL Query Error.....")
    DynaSetOpenError = True
   
  End If
  On Error GoTo 0
 
End Function

'''''''''''''''''''''''''''''''''''''''''''''''''''
'    Function:  CloseDynaSet()                    '
'                                                 '
' Description:  Closes the Open Dynaset.          '
'                                                 '
'       Input:  None.                             '
'                                                 '
'      Output:  None.                             '
'                                                 '
'     Returns:  Nothing into the DynaSet Object.  '
'                                                 '
'''''''''''''''''''''''''''''''''''''''''''''''''''
Public Function CloseDynaSet() As Object

  Set CloseDynaSet = Nothing

End Function

'''''''''''''''''''''''''''''''''''''''''''''''''''
'    Function:  DatabaseClose()                   '
'                                                 '
' Description:  Closes an Open Oracle Database.   '
'               Database should have been opened  '
'               using OpenDatabase.               '
'                                                 '
'       Input:  NONE.                             '
'                                                 '
'      Output:  Clears OraSession and oraDatabase.'
'                                                 '
'     Returns:  NONE.                             '
'                                                 '
'''''''''''''''''''''''''''''''''''''''''''''''''''
Public Sub DatabaseClose()
 
  Set OraSession = Nothing
  Set oraDatabase = Nothing

End Sub
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