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https://issues.apache.org/jira/browse/HIVE-6797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13955964#comment-13955964
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Harish Butani commented on HIVE-6797:
-------------------------------------
+1
> Add protection against divide by zero in stats annotation
> ---------------------------------------------------------
>
> Key: HIVE-6797
> URL: https://issues.apache.org/jira/browse/HIVE-6797
> Project: Hive
> Issue Type: Sub-task
> Components: Query Processor, Statistics
> Affects Versions: 0.13.0
> Reporter: Prasanth J
> Assignee: Prasanth J
> Fix For: 0.13.0
>
> Attachments: HIVE-6797.1.patch
>
>
> In stats annotation, the denominator computation in join operator is not
> protected for divide by zero exception. It will be an issue when NDV (count
> distinct) updated by updateStats() becomes 0. This patch adds protection in
> updateStats() method to prevent divide-by-zero in downstream operators.
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