Oracle UDTs Ánh xạ loại tùy chỉnh cho không được chỉ định hoặc không hợp lệ

Tôi đã thử khứ hồi đơn giản và mọi thứ dường như hoạt động tốt.

void Main()
{
    using (var connection = new OracleConnection("DATA SOURCE=HQ_PDB_TCP;PASSWORD=oracle;USER ID=HUSQVIK"))
    {
        connection.Open();

        using (var command = connection.CreateCommand())
        {
            command.CommandText = "DECLARE i SYS.ODCICOST := :p; BEGIN :p := SYS.ODCICOST(i.CPUCOST + 1, i.IOCOST + 1, i.NETWORKCOST + 1, i.INDEXCOSTINFO || 'Dummy'); END;";
            command.BindByName = true;

            var parameter = command.CreateParameter();
            parameter.Direction = ParameterDirection.InputOutput;
            parameter.ParameterName = "p";
            parameter.OracleDbType = OracleDbType.Object;
            parameter.UdtTypeName = "SYS.ODCICOST";
            parameter.Value = new OdciCost { CPUCOST = 123, INDEXCOSTINFO = "DUMMY", IOCOST = 456, NETWORKCOST = 789 };
            command.Parameters.Add(parameter);

            command.ExecuteNonQuery();

            var odciCost = (OdciCost)parameter.Value;
            Console.WriteLine($"CPUCOST={odciCost.CPUCOST}; IOCOST={odciCost.IOCOST}; NETWORKCOST={odciCost.NETWORKCOST}; INDEXCOSTINFO={odciCost.INDEXCOSTINFO}");
        }
    }
}

[OracleCustomTypeMapping("SYS.ODCICOST")]
public class OdciCost : IOracleCustomType, IOracleCustomTypeFactory, INullable
{
    private bool _isNull;
    [OracleObjectMapping("CPUCOST")]
    public decimal CPUCOST;
    [OracleObjectMapping("INDEXCOSTINFO")]
    public string INDEXCOSTINFO;
    [OracleObjectMapping("IOCOST")]
    public decimal IOCOST;
    [OracleObjectMapping("NETWORKCOST")]
    public decimal NETWORKCOST;

    public IOracleCustomType CreateObject()
    {
        return new OdciCost();
    }

    public void FromCustomObject(OracleConnection connection, IntPtr pointerUdt)
    {
        OracleUdt.SetValue(connection, pointerUdt, "CPUCOST", CPUCOST);
        OracleUdt.SetValue(connection, pointerUdt, "IOCOST", IOCOST);
        OracleUdt.SetValue(connection, pointerUdt, "NETWORKCOST", NETWORKCOST);
        OracleUdt.SetValue(connection, pointerUdt, "INDEXCOSTINFO", INDEXCOSTINFO);
    }

    public void ToCustomObject(OracleConnection connection, IntPtr pointerUdt)
    {
        CPUCOST = (decimal)OracleUdt.GetValue(connection, pointerUdt, "CPUCOST");
        IOCOST = (decimal)OracleUdt.GetValue(connection, pointerUdt, "IOCOST");
        NETWORKCOST = (decimal)OracleUdt.GetValue(connection, pointerUdt, "NETWORKCOST");
        INDEXCOSTINFO = (string)OracleUdt.GetValue(connection, pointerUdt, "INDEXCOSTINFO");
    }

    public bool IsNull
    {
        get { return this._isNull; }
    }

    public static OdciCost Null
    {
        get { return new OdciCost { _isNull = true }; }
    }
}