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https://issues.apache.org/jira/browse/HIVE-259?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12837527#action_12837527
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Carl Steinbach commented on HIVE-259:
-------------------------------------

bq. How did you get this list? 

Run 'ant checkstyle'. The list of violations gets dumped to 
build/checkstyle/checkstyle-errors.txt.

bq. Why HashMap and ArrayList are not allowed if supported?

You're allowed to use ArrayList and HashMap, but you're supposed to refer
to instances of these classes using the interface (List or Map) instead of the
concrete type, e.g.

{code:java}
Map<String, String> myMap = new HashMap<String, String>();

public List<String> getStringList() {
   return new ArrayList<String>();
}
{code}



> Add PERCENTILE aggregate function
> ---------------------------------
>
>                 Key: HIVE-259
>                 URL: https://issues.apache.org/jira/browse/HIVE-259
>             Project: Hadoop Hive
>          Issue Type: New Feature
>          Components: Query Processor
>            Reporter: Venky Iyer
>            Assignee: Jerome Boulon
>         Attachments: HIVE-259-2.patch, HIVE-259.1.patch, HIVE-259.patch, 
> jb2.txt, Percentile.xlsx
>
>
> Compute atleast 25, 50, 75th percentiles

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