ORA-01460:转换请求无法实现或不合理

Question

                            FileInfo fi = new FileInfo(path);
                            int imgLength = (int)fi.Length;  //length
                            byte[] imgData = new byte[imgLength];
                            Stream imgStream = fi.OpenRead();
                            int n = imgStream.Read(imgData, 0, imgLength);
                                OracleParameter paramPhoto = new OracleParameter("zp", OracleType.Blob);//照片
                                paramPhoto.Value = imgData;
                                MyOracleCommand.Parameters.Add(paramPhoto);                                //执行
                                MyOracleCommand.ExecuteNonQuery();
在进行存储图片文件时30KB的话，将会提示如下问题：“ORA-01460:转换请求无法实现或不合理 ”

Answer 1

blob 字段blob的大小不可设啊