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6.4

Can't select id for record inserted within a transaction

Asked by davidsperling in Programming for ASP.NET, Oracle Database, .NET

I need to select the id of a newly created record, before that database operation is commited.

Code below generates this error:

"ORA-08002: sequence SEQ_ORANGE_REQUEST.CURRVAL is not yet defined in this session "

Se tag "PROBLEM HERE" in code! 
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public static int addOrangeRequest(List<OrangeRequestDataObject> oranges, string requestedBy, DateTime reqDateOfDelivery, int userId)
    {
 
 
        DateTime requestDate = DateTime.Now;
        int requestStatus = (int)RequestStatusCode.Requested;
        OleDbConnection con = new OleDbConnection(getConnectionString());
        con.Open();
        OleDbTransaction trans=con.BeginTransaction();
 
 
        OleDbCommand cmd1 = new OleDbCommand();
        OleDbCommand cmd2 = new OleDbCommand();
        cmd1.Connection = con;
        cmd2.Connection = con;
 
        // Assign transaction object to Commands:
        cmd1.Transaction = trans;
        cmd2.Transaction = trans;
 
 
        try
        {
 
            const string sql1 = "insert into orange_request (requested_by, request_date ,date_of_delivery, request_status, user_id) values (?,?,?,?,?)";            
            cmd1.Parameters.Add(new OleDbParameter("", requestedBy));
            cmd1.Parameters.Add(new OleDbParameter("", requestDate));
            cmd1.Parameters.Add(new OleDbParameter("", reqDateOfDelivery));
            cmd1.Parameters.Add(new OleDbParameter("", requestStatus));
            cmd1.Parameters.Add(new OleDbParameter("", userId));
            cmd1.CommandText = sql1;
            cmd1.ExecuteNonQuery();
 
 
            //PROBLEM HERE:
            //get the latest request id
            int requestId = Convert.ToInt32(getSingleVal("SELECT SEQ_ORANGE_REQUEST.CURRVAL as new_id FROM dual", getConnectionString()));
 
 
            //insert all oranges to table orange_request_detail
            const string sqlTemplate = "insert into orange_request_detail (orange_request_id, orange_id, requested_size) values({0},{1},{2});\n ";
            string sql2 = "begin\n ";
            foreach (OrangeRequestDataObject orange in oranges)
            {
                sql2 += String.Format(sqlTemplate, requestId, orange.OrangeId, orange.RequestedSize);
            }
            sql2 += "end; ";
            cmd2.CommandText = sql2;
            cmd2.CommandType = CommandType.Text;
            cmd2.ExecuteNonQuery();
        }
        catch (Exception err)
        {
            trans.Rollback(); 
            throw new Exception("addOrangeRequest database operation failed: "+ err.Message); 
        }
        finally        
        {            
            con.Close();
        }
 
 
 
        return oranges.Count; //return number of oranges added to request
    }
[+][-]10/20/09 07:20 AM, ID: 25614417Accepted Solution

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About this solution

Zones: Programming for ASP.NET, Oracle Database, .NET
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Solution Provided By: davidsperling
Participating Experts: 0
Solution Grade: A
 
 
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