public static String qualifyDatabaseName(String databaseName) {
    if (databaseName != null && !databaseName.startsWith("root.")) {
      databaseName = "root." + databaseName;
    }
    return databaseName;
  }
Remove the back quotes of a measurement if necessary
iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/utils/PathUtils.java