Github user geetikagupta16 commented on a diff in the pull request:

    https://github.com/apache/carbondata/pull/2139#discussion_r180649360
  
    --- Diff: 
integration/presto/src/main/java/org/apache/carbondata/presto/PrestoFilterUtil.java
 ---
    @@ -69,6 +72,13 @@
     
       private static Map<Integer, Expression> filterMap = new HashMap<>();
     
    +  private final static String HIVE_DEFAULT_DYNAMIC_PARTITION = 
"__HIVE_DEFAULT_PARTITION__";
    --- End diff --
    
    HIVE_DEFAULT_DYNAMIC_PARTITION is created when the partition value for that 
column is null so the data goes to __HIVE_DEFAULT_PARTITION__ partition. This 
check is added so that we can query the data from __HIVE_DEFAULT_PARTITION__ as 
well.


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