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https://issues.apache.org/jira/browse/HIVE-1470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12889550#action_12889550
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John Sichi commented on HIVE-1470:
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Unit test?
> percentile_approx() fails with more than 1 reducer
> --------------------------------------------------
>
> Key: HIVE-1470
> URL: https://issues.apache.org/jira/browse/HIVE-1470
> Project: Hadoop Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 0.6.0
> Reporter: Mayank Lahiri
> Assignee: Mayank Lahiri
> Fix For: 0.7.0
>
> Attachments: HIVE-1470.1.patch
>
>
> The larger issue is that a UDAF that has variable return types needs two
> inner Evaluator classes. This patch fixes a NullPointerException bug that is
> only encountered when partial aggregations are invoked.
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