OracleDataAdapter returning wrong number of columns

Question

Hello All,
I have an issue of an oracle data adapter not returning all columns in my select statement. When I use code similar to below, the data adapter returns 2 columns per row instead of 5. And they are out of order (ie, DataRow(0) could be column 1 and DataRow(1) could be column 4 -- so I don't see which columns have been dropped without looking at the value).
The database id XE on the local machine. The connection works fine. And the internal VS.NET PL/SQL debugger returns the query just fine.
Some of the columns I'm trying to get are null -- in fact, most are. But they are changed during the program. So I still need them to show up in the dataset.
BTW, I have had zero success getting OracleCommand.BindByName and OracleParameters to work, so I punted. Since I can get what I want out of readers and datasets, I can live without'em -- or can I?!?!
I think my problem has something to do with handling null values. So I have tried the select statement with NVL wrapping the fields that could be null. But still no success.
Any ideas?
Table:
account char(30) not null
col_code as NUMBER(1,0) null ok
columnIDontNeed as whatever null ok
sum1 as char(1) null ok
sum2 as char(1) null ok
sum3 as char(1) null ok
anotherColumnIDontNeed as whatever null ok
Sample Code:
dim oconn as New OracleConnection(conStrBldr.toString)
Dim cmdLedger As OracleCommand = oconn.CreateCommand
cmdLedger.BindByName = True ' seems to affect nothing! ever!
cmdLedger.AddToStatementCache = False ' no noticable affect
cmdLedger.CommandText = " SELECT account,col_code,sum1,sum2,sum3 "
cmdLedger.CommandText &= "FROM gl.ledger "
cmdLedger.CommandText &= "ORDER BY gl.ledger.account "
cmdLedger.CommandType = CommandType.Text
' Create DataAdapter based on main Ledger SELECT
Dim cmdLedgerDA As New OracleDataAdapter(cmdLedger)
cmdLedgerDA.ReturnProviderSpecificTypes = True ' same results with False
' Create DataSet and Fill it.
' After this, we can now use this dataset
' to iterate through the GL ledger data.
Dim cmdLedgerDS As New DataSet("GLBal")
Try ' to fill dataset with Ledger SELECT
' fill dataset from OracleDataAdapter and the
' previously defined Oracle Command.
cmdLedgerDA.Fill(cmdLedgerDS, "GL.LEDGER") ' tried with and without src
Catch ex As OracleException
ShowEx(ex)
End Try ' to fill dataset with Ledger SELECT
These are the typical test from within VB that I've run to check what was returned:
console.writeline(cmdLedgerDS.Tables(0).Rows(0).ItemArray.Length)
2
dim row as DataRow = cmdLedgerDS.Tables(0).Rows(0)
console.writeline(row(0).toString & row(1).toString & row(2).toString & row(3).toString & row(4).toString) ' EXCEPTION IS THROWN

Answer 1

I cannot reproduce the error using basic code below. What is the specific exception you get?
And BindByName is not necessary since you're not using bind variables
Sub Main()
    Dim da As OracleDataAdapter
    Dim sqlstr As String
    Dim connstr As String
    Dim ds As DataSet
    Dim dr As DataRow
    Dim dc As DataColumn
    Try
        sqlstr = "select employee_id, first_name, last_name, null, salary "
        sqlstr &= "from employees where rownum < 10"
        connstr = "Data Source=xe;User ID=hr;Password=hr;"
        da = New OracleDataAdapter(sqlstr, New OracleConnection(connstr))
        ds = New DataSet("EmployeeDS")
        da.Fill(ds, "employees")
        For Each dc In ds.Tables("employees").Columns
            Console.Write(dc.ColumnName & " ")
        Next
        Console.WriteLine()
        For Each dr In ds.Tables("employees").Rows
            Console.WriteLine(dr(0).ToString & " " & _
                dr(1).ToString & " " & dr(2).ToString & " " & _
                dr(3).ToString & " " & dr(4).ToString)
        Next
    Catch ex As Exception
        Console.WriteLine(ex.Message)
    End Try
End SubOutput should look like
EMPLOYEE_ID FIRST_NAME LAST_NAME NULL SALARY
100 Steven King  24000
101 Neena Kochhar  17000
102 Lex De Haan  17000
103 Alexander Hunold  9000
104 Bruce Ernst  6000
105 David Austin  4800
106 Valli Pataballa  4800
107 Diana Lorentz  4200
108 Nancy Greenberg  12000I am using VS2005, ODP 10.2.0.2.21 and OracleXE on remote machine.
NH
Message was edited by:
nurhidayat