Github user HuJiayin commented on a diff in the pull request: https://github.com/apache/spark/pull/7236#discussion_r34229711 --- Diff: unsafe/src/main/java/org/apache/spark/unsafe/types/UTF8String.java --- @@ -254,6 +254,70 @@ public boolean equals(final Object other) { } } + /** + * Levenshtein distance is a metric for measuring the distance of two strings. The distance is + * defined by the minimum number of single-character edits (i.e. insertions, deletions or + * substitutions) that are required to change one of the strings into the other. + */ + public int levenshteinDistance(UTF8String other) { + // Implementation adopted from org.apache.common.lang3.StringUtils.getLevenshteinDistance + + int n = numChars(); --- End diff -- If each string will not exceed 65535 characters, you can use unsigned short maybe.
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