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

    https://github.com/apache/incubator-carbondata/pull/176#discussion_r80179589
  
    --- Diff: 
core/src/main/java/org/apache/carbondata/core/util/CarbonTimeStatisticsFactory.java
 ---
    @@ -17,13 +17,14 @@
     
     package org.apache.carbondata.core.util;
     
    -import 
org.apache.carbondata.core.carbon.querystatistics.DriverQueryStatisticsRecorder;
    +import org.apache.carbondata.core.carbon.querystatistics.*;
     import org.apache.carbondata.core.constants.CarbonCommonConstants;
     
     public class CarbonTimeStatisticsFactory {
       private static String LoadStatisticsInstanceType;
       private static LoadStatistics LoadStatisticsInstance;
    -  private static DriverQueryStatisticsRecorder 
QueryStatisticsRecorderInstance;
    +  private static String queryStatisticsRecorderInstanceType;
    +  private static QueryStatisticsRecorder QueryStatisticsRecorderInstance;
    --- End diff --
    
    And seems it is not initialized but returned in 
`getQueryStatisticsRecorderInstance` function?


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