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https://issues.apache.org/jira/browse/HIVE-7323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14054393#comment-14054393
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Navis commented on HIVE-7323:
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I cannot reproduce this but in a complex query with correlation optimizer, I've
seen the value inside the same DateWritable instance is changed between
set-time and write-time, making invalid stats.
> Date type stats in ORC sometimes go stale
> -----------------------------------------
>
> Key: HIVE-7323
> URL: https://issues.apache.org/jira/browse/HIVE-7323
> Project: Hive
> Issue Type: Bug
> Components: Statistics
> Reporter: Navis
> Assignee: Navis
> Priority: Minor
> Attachments: HIVE-7323.1.patch.txt
>
>
> I cannot make proper test case but sometimes min/max value in date type stats
> is changed in runtime. Stats for other type contains non-mutable values in it
> but date type stats contains DateWritable, which of inner value can be
> changed anytime.
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