[GitHub] carbondata pull request #1751: [CARBONDATA-1971][Blocklet Prunning] Measure ...

[jackylk]

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

    https://github.com/apache/carbondata/pull/1751#discussion_r159368023
  
    --- Diff: 
core/src/main/java/org/apache/carbondata/core/datastore/DataRefNode.java ---
    @@ -71,6 +71,8 @@
        */
       byte[][] getColumnsMinValue();
     
    +  byte[] getColumnsNullValue();
    --- End diff --
    
    please add comment


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