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How would you return the values when calling a Sybase stored procedure call ?

Posted on 2008-10-15
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Last Modified: 2013-11-27
I am developing an Access mdb application using Access as the front end and I call a sybased stored procedure named sp3D_GetListOfDocuments. My code is the Attach Code Snippet.

How would you modify this code to execute the stored procedure that returns
a result set which is comprised of the following 3 columns:
1) MailID
2) NoOfPages
3) NoOfAttributes
This stored procedure does not require any parameters.

My goal is to load the result set records by APPENDING THEM into the table tblNameAddressMod.  

In the following Attach Code Snippet, the table tblNameAddressMod has the same 3 fields:

1) MailID
2) NoOfPages
3) NoOfAttributes

For Example, the result set could have the following values:
------------------------------------------------------------------------

MailID                               NoOfPages                          NoOfAttributes
-----------------                 ----------------                       -------------------
200707091208                1                                           3
200707091235                1                                           3
200707091356                1                                           3

Private Sub Command9_Click()
Dim com As ADODB.Command
Dim recNameAdress As ADODB.Recordset
Dim cmd As ADODB.Command
Dim oConn
Dim strMailID As String
Dim strNoOfPages As String
Dim strNoOfAttributes As String
 
DoCmd.Hourglass True
On Error Resume Next
Set oConn = CreateObject("ADODB.Connection")
oConn.Open "DSN=N_DIG_MAIL;" & _
 "Uid=PC;" & _
 "Pwd=po"
 
Dim rst As ADODB.Recordset
Set rst = New ADODB.Recordset
 
rst.Open "SELECT MailID FROM tblNameAddressMod", CurrentProject.Connection
 
Set cmd = New ADODB.Command
With cmd
    .ActiveConnection = oConn
    .CommandType = adCmdText
    .CommandText = "exec sp3D_GetListOfDocuments"
    Set recNameAdress = .Execute
End With
 
strMailID = recNameAdress("MailID")
strNoOfPages = Nz(recNameAdress("NoOfPages"), " ")
strNoOfAttributes = Nz(recNameAdress("NoOfAttributes"), " ")
 
CurrentProject.Connection.Execute "INSERT INTO tblNameAddress Set MailID ='" & Replace(strMailID, "'", "''") & "', " & _
"NoOfPages ='" & strNoOfPages & "', NoOfAttributes ='" & strNoOfAttributes & "    "
 
recNameAdress.Close

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Comment
Question by:zimmer9
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7 Comments
 
LVL 9

Expert Comment

by:borki
ID: 22728261
Hi Zimmer9

I think you were almost there!

You can directly execute a stored procedure (SP) using ADO with MS SQL (I don't have Sybase).

You did not specify the data types of the columns returned. I would have thought that the 2nd and 3rd one were numeric. You need to watch out for conversion problems.

While your approach to build a SQL Insert statement is valid, I prefer to use a recordset.

Hope that helps

Felix Burkhard


Private Sub test()
   Dim oConn As New ADODB.Connection
   Dim oCmd As New ADODB.Command
   Dim recSP As New ADODB.Recordset
   Dim recMod As New ADODB.Recordset
    
   DoCmd.Hourglass True
   On Error Resume Next
   
   'Prepare command object with SP
   oConn.ConnectionString = "DSN=N_DIG_MAIL;Uid=PC;Pwd=po"
   With oCmd
       .ActiveConnection = oConn
       .CommandType = adCmdStoredProc
       .CommandText = "sp3D_GetListOfDocuments"
   End With
       
   'Open command object - executes SP
   recSP.Open oCmd
   If recSP.EOF Then
      'Handle error...
      Exit Sub
   End If
   
   'Open local dataset
   recMod.Open "tblNameAddressMod", CurrentProject.Connection, adOpenForwardOnly, adLockOptimistic, adCmdTable
   
   'Loop through records retrieved from SP
   Do While Not recSP.EOF
      'Copy data from SP output into new local record
      recMod.AddNew
      recMod!MailID = recSP!MailID
      recMod!NoOfPages = Nz(recSP!NoOfPages, " ")
      recMod!NoOfAttributes = Nz(recSP!NoOfAttributes, " ")
      recMod.Update
      'Advance cursor to next row
      recSP.MoveNext
   Loop
   recSP.Close
   recMod.Close
   Set recSP = Nothing
   Set recMod = Nothing
   DoCmd.Hourglass False
End Sub

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0
 

Author Comment

by:zimmer9
ID: 22729939
I am a user who needs to access a Sybase database and call a stored procedures exposed to me to get information as a Sybase result set. I don't have any choice in the matter.

0
 

Author Comment

by:zimmer9
ID: 22730040
Can anyone confirm whether or not the solution above proposed by Felix should work as is  
using ADO with Sybase ? I have tried implementing it and as I step throught the execution I get to the following line in which the recordset is opened and the EOF is reached immediatately and the subroutine exits.

'Open command object - executes SP
   recSP.Open oCmd
   If recSP.EOF Then
      'Handle error...
      Exit Sub
   End If


thanks,
zimmer9
0
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LVL 9

Expert Comment

by:borki
ID: 22735156
Hi Zimmer9

I just re-checked my code, and I think I forgot to open the connection. Try to add these 2 lines

10a   oConn.Provider = "ASEOLEDB"
11a   oConn.Open

Let me know how you go

0
 

Author Comment

by:zimmer9
ID: 22742242
Where is the linkage between the result set from the execution of stored procedure sp3D_GetListOfDocuments             and the record set recSP ?

By the way, I use ODBC with DataDirect 4.0 Sybase Wire Protocol driver.
0
 

Author Comment

by:zimmer9
ID: 22742274
Don't I need a .Execute line in the following With/End With ?

With oCmd
       .ActiveConnection = oConn
       .CommandType = adCmdStoredProc
       .CommandText = "sp3D_GetListOfDocuments"
End With
0
 
LVL 9

Accepted Solution

by:
borki earned 500 total points
ID: 22751574
Hi Zimmer9

There are two types of commands you can have with ADO,
1) use Execute to run an Action query (Insert/Update/Delete)
2) use Recordset.Open to run a Select query that returns rows of data

Did you try the code with the modification I sent?

I am not sure what DataDirect 4 for Sybase is and does... I gound some references on the Sybase site that uses "ASEOLEDB" - what appears to be a specific OLEDB provider for Sybase. Not sure where ODBC fits in, but if you are using it, I would think that your remote data is already accessible via a linked table.

Good luck



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