MySQL Bugs: #1167: MyODBC and Describe Table

Bug #1167	MyODBC and Describe Table
Submitted:	30 Aug 2003 7:10	Modified:	16 Oct 2003 22:32
Reporter:	Ageu, Jr, Magrini	Email Updates:
Status:	Can't repeat	Impact on me:	None
Category:	Connector / ODBC	Severity:	S3 (Non-critical)
Version:	3.51.06	OS:	Windows (Windows 98 SE)
Assigned to:	Venu Anuganti	CPU Architecture:	Any

Description:
The code below works fine with "Show tables", "show databases" but receives an error with "Describe (table)" .
The Error is in the movenext point. 
The error just occurs when the next record has Null=Yes and there is no default value.
The error is "Data provider or other service returned an E_FAIL status." 

How to repeat:
Build a table with some field with Null=Yes and no default value.
Try to use the code below to send the command "Describe table".

---------------------------------------------------------------
Private Cn As adodb.Connection 
Private rs As adodb.Recordset 

Private Sub Command1_Click() 
    Dim Texto As String 
    Dim N As Integer 
    On Error GoTo Error_Handler 
    rs.CursorLocation = adUseClient 
    rs.Open Text1.Text, Cn, adOpenStatic, adLockReadOnly 
    MSF.Cols = rs.Fields.Count 
    MSF.Rows = 0 
    For N = 0 To MSF.Cols - 1 
        Texto = Texto + rs.Fields(N).Name + Chr(9) 
    Next 
    MSF.AddItem Texto 
    Texto = "" 
    Do While Not rs.EOF 
        For N = 0 To MSF.Cols - 1 
            Texto = Texto + rs.Fields(N) + Chr(9) 
        Next 
        MSF.AddItem Texto 
        Texto = "" 
        rs.MoveNext 
    Loop 
    MSF.FixedRows = 1 
    MSF.FixedCols = 0 
    rs.Close 
    Exit Sub 
    
Error_Handler: 
    Geral.Erro "Geral", "SqlReg", "SqlReg", Text1 
End Sub 

Private Sub Form_Load() 
    Set Cn = New adodb.Connection 
    Set rs = New adodb.Recordset 
    'conn.ConnectionString = "DRIVER=MySQL;" 
    Cn.ConnectionString = "DRIVER={MySQL ODBC 3.51 Driver};" _ 
                        & "SERVER=10.0.0.8;" _ 
                        & "DATABASE=pai;" _ 
                        & "UID=Juba;PWD=juba; OPTION=35;PORT=3306;" 

    Cn.Open 
End Sub

Hi !!

I am not able to reproduce the bavaviour as it simply works fine. Here is the test case and its output performed from 3.51.06 and 3.51.07:

Private Sub Describe_Click()

  Dim Cn As New Connection
  Dim rs As New Recordset
  Dim Texto As String
  Dim N, count, Rows As Integer

  Cn.ConnectionString = "DSN=myodbc3;OPTION=35" ' try to avoid 35
  Cn.Open
  
  Cn.Execute "DROP TABLE t_desc"
  Cn.Execute "CREATE TABLE t_desc(id int, id1 char(2) NOT NULL PRIMARY KEY DEFAULT '10')"
  rs.Open "Describe t_desc", Cn, adOpenStatic, adLockOptimistic

  rs.MoveFirst
  Debug.Print String(15, "-") & "DESCRIBE t_desc " & String(15, "-")
  For Each fld In rs.Fields
    Debug.Print fld.Name,
  Next
  Debug.Print
  Debug.Print String(35, "-")
    
  Do Until rs.EOF
    For Each fld In rs.Fields
      Debug.Print fld.Value,
    Next
    rs.MoveNext
    Debug.Print
 Loop
 Debug.Print "Total records: " & rs.RecordCount
 rs.Close
End Sub

Output:

---------------DESCRIBE t_desc ---------------
Field    Type     Null     Key       Default    Extra         
-----------------------------------
id       int(11)  YES      Null                  
id1      char(2)           PRI           10

I have two Mysql installed. One on Debian and other on Madrake.
The Debian one is 3.23.49 There is no newer for debian.
The Mandrake is 3.23.56.

When I reported the problem I just tested with the debian.
I note that the instructions works fine with Madrake one.
But The problem is still happen with Debian.

I thought bug is in Myodbc, because the instruction works fine in Debian console.