@Override
  public String getDisplayString(String[] children) {
    return getStandardDisplayString(getFuncName(), children);
  }
GenericUDFSoundex.

Soundex is an encoding used to relate similar names, but can also be used as
a general purpose scheme to find word with similar phonemes.
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFSoundex.java