public static String unEscapeString(String s) {
    return s != null && s.contains("\\,") ? StringUtils.unEscapeString(s) : s;
  }
replaces all occurrences of "\," with ","; returns {@code s} if no modifications needed
hcatalog/webhcat/svr/src/main/java/org/apache/hive/hcatalog/templeton/tool/TempletonUtils.java