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https://issues.apache.org/jira/browse/HIVE-259?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12832139#action_12832139
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Todd Lipcon commented on HIVE-259:
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Agreed re HashMap. Also, there should be some kind of setting that limits how
much RAM gets used up. In a later iteration we could do adaptive histogramming
once we hit the limit. In this version we should just throw up our hands and
fail with a message that says the user needs to discretize harder.
> 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.patch
>
>
> Compute atleast 25, 50, 75th percentiles
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