[jira] [Assigned] (HIVE-27000) Improve the modularity of the *ColumnStatsMerger classes

["Alessandro Solimando (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-27000?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alessandro Solimando reassigned HIVE-27000:
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> Improve the modularity of the *ColumnStatsMerger classes
> --------------------------------------------------------
>
>                 Key: HIVE-27000
>                 URL: https://issues.apache.org/jira/browse/HIVE-27000
>             Project: Hive
>          Issue Type: Improvement
>          Components: Statistics
>    Affects Versions: 4.0.0-alpha-2
>            Reporter: Alessandro Solimando
>            Assignee: Alessandro Solimando
>            Priority: Major
>
> *ColumnStatsMerger classes contain a lot of duplicate code which is not specific to the data type, and that could therefore be lifted to a common parent class.
> This phenomenon is bound to become even worse if we keep enriching further our supported set of statistics as we did in the context of HIVE-26221.
> The current ticket aims at improving the modularity and code reuse of the *ColumnStatsMerger classes, while improving unit-test coverage to cover all classes and support more use-cases.



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