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https://issues.apache.org/jira/browse/HIVE-734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12740388#action_12740388
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Ning Zhang commented on HIVE-734:
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Thanks for the pointer Zheng. We certainly can use JavaVoidObjecInspector for
NULL. However it turns out NULL is more complicated than what it sounds like
(see http://en.wikipedia.org/wiki/Null_(SQL) ). NULL has to be handled not only
in this simple select cause, but also in much more complex cases in the
where-clause and joins. Let's have a talk.
> problem in dealing with null
> ----------------------------
>
> Key: HIVE-734
> URL: https://issues.apache.org/jira/browse/HIVE-734
> Project: Hadoop Hive
> Issue Type: Bug
> Reporter: Zheng Shao
> Assignee: Ning Zhang
>
> This command fails with the following error:
> {code}
> hive/bin/hive -e "INSERT OVERWRITE LOCAL DIRECTORY 'abc' select null from
> zshao_tt"
> FAILED: Error in semantic analysis:
> java.lang.RuntimeException: Internal error: Cannot find ObjectInspector for
> VOID
> {code}
> When 'null' is replaced by '' it works.
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