Github user srowen commented on a diff in the pull request:

    https://github.com/apache/spark/pull/7390#discussion_r34541474
  
    --- Diff: unsafe/src/main/java/org/apache/spark/unsafe/types/Interval.java 
---
    @@ -43,12 +43,13 @@
        * Finally is the unit name, ends with an optional "s".
        */
       private static String unitRegex(String unit) {
    -    return "(?:\\s+(-?\\d+)\\s+" + unit + "s?)?";
    +    return "(?:\\s+(-?\\d+)\\s+" + unit + "s?\\s*)?";
    --- End diff --
    
    Sort-of related question -- why is this class in 'unsafe', and why not use 
Joda time? the JDK already has a rich set of abstractions for time. It seems 
like it's only used in catalyst.


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