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Posted to dev@hive.apache.org by "Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org> on 2017/06/22 15:21:00 UTC

[jira] [Created] (HIVE-16945) Add method to compare Operators

Jesus Camacho Rodriguez created HIVE-16945:
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             Summary: Add method to compare Operators 
                 Key: HIVE-16945
                 URL: https://issues.apache.org/jira/browse/HIVE-16945
             Project: Hive
          Issue Type: Improvement
          Components: Operators
    Affects Versions: 3.0.0
            Reporter: Jesus Camacho Rodriguez


HIVE-10844 introduced a comparator factory class for operators that encapsulates all the logic to assess whether two operators are equal:
https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/OperatorComparatorFactory.java

The current design might create problems as any change in fields of operators will break the comparators. It would be better to do this via inheritance from Operator base class, by adding a {{compareTo(Operator other)}} method.



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