// Step 3: write the generated script into rootpath
        public string writeStringToDisk(string rootPath, string objType, string scriptStr, string userID)
        {
            FileUtil fu = new FileUtil();
            string fileName = userID.ToLower() + "-db-ddl-" + Constants.exeSeqDict[objType];
            fu.setRootPath(rootPath);

            string outputFileName = fu.writeScript2CorrectFile(scriptStr, fileName);
            return outputFileName;
        }
        /*************************************
        * write the script into disk
        *************************************/
        private string writeStringToDisk(string rootPath, string tableName, string scriptStr)
        {
            FileUtil fu = new FileUtil();
            string fileName = tableName + "_preload.sql";
            fu.setRootPath(rootPath);

            string outputFileName = fu.writeScript2CorrectFile(scriptStr, fileName);
            return outputFileName;
        }