[GitHub] carbondata issue #1235: fixed bug for IsNull and IsNotNull clause in presto

[steven-qin]

Github user steven-qin commented on the issue:

    https://github.com/apache/carbondata/pull/1235
  
    Hi @anubhav100 
    Based on the commit "69c634c5f32dfc333919d0b3e6cc342e15638cf7",I find the 
problem and subsequent versions have been fixed it.
    
    git checkout -b  pre  69c634c5f32dfc333919d0b3e6cc342e15638cf7
    
    mvn -DskipTests -Pspark-2.1 -Dspark.version=2.1.0 clean package
    
    create statemant: carbon.sql("create table nation ( n_nationkey int, n_name 
string, n_regionkey int, n_comment string ) stored by 'carbondata'")
    
    load statemant: carbon.sql("LOAD DATA INPATH 
'/viphome/qr/testdata/nation_null.csv' INTO TABLE nation  
OPTIONS('DELIMITER'='\u0001')")
    
    sql: select * from nation where n_comment is null;
         select * from nation where n_comment is not null;
    
![not_null_clause](https://user-images.githubusercontent.com/15090715/29406335-4fdbdccc-8373-11e7-9692-873d1939224b.jpg)
    
    
    
![null_clause](https://user-images.githubusercontent.com/15090715/29406240-0d07f6ce-8373-11e7-8e03-61968a85c437.jpg)
    
    



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