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https://issues.apache.org/jira/browse/HIVE-18622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16356631#comment-16356631
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Matt McCline commented on HIVE-18622:
-------------------------------------
[~vihangk1] This problem causes wrong query results. Backporting will be
manual and very tedious.
> Vectorization: IF Statements, Comparisons, and more do not handle NULLs
> correctly
> ---------------------------------------------------------------------------------
>
> Key: HIVE-18622
> URL: https://issues.apache.org/jira/browse/HIVE-18622
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Reporter: Matt McCline
> Assignee: Matt McCline
> Priority: Critical
> Fix For: 3.0.0
>
> Attachments: HIVE-18622.03.patch
>
>
>
> Many vector expression classes are missing guards around setting noNulls
> among other things.
> {code:java}
> // Carefully update noNulls...
> if (outputColVector.noNulls) {
> outputColVector.noNulls = inputColVector.noNulls;
> }
> {code}
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