[GitHub] orc pull request #184: Orc 256 unmask range option

[xndai]

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

    https://github.com/apache/orc/pull/184#discussion_r154761126
  
    --- Diff: 
java/core/src/java/org/apache/orc/impl/mask/RedactMaskFactory.java ---
    @@ -114,6 +120,10 @@
       private final boolean maskDate;
       private final boolean maskTimestamp;
     
    +  // index tuples that are not to be masked
    +  private final SortedMap<Integer,Integer> unmaskIndexRanges = 
Collections.synchronizedSortedMap(new TreeMap());
    --- End diff --
    
    Any particular reason that you need a sychronized map here?


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