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https://issues.apache.org/jira/browse/HIVE-4575?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13661029#comment-13661029
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Eric Hanson commented on HIVE-4575:
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I'm not sure I understand the problem here. Can you give a repro?
> In place filtering in Not Filter doesn't handle nulls correctly.
> ----------------------------------------------------------------
>
> Key: HIVE-4575
> URL: https://issues.apache.org/jira/browse/HIVE-4575
> Project: Hive
> Issue Type: Sub-task
> Reporter: Jitendra Nath Pandey
> Assignee: Jitendra Nath Pandey
>
> The FilterNotExpr evaluates the child expression and takes the compliment of
> the selected vector. Since child expression filters out null values, the
> compliment includes the nulls in the output. This is incorrect because
> not(null) = null.
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