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https://issues.apache.org/jira/browse/HIVE-5473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13788638#comment-13788638
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N Campbell commented on HIVE-5473:
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other cases are
select 0 / 0 from tversion
select sqrt ( -4 ) from tversion
select power( 0, -1) from tversion
note, in ISO these should be exceptions
in the first case you get a garbage value lack and infinity in the others
so even if design intent in hive the docs make no statement etc.
> sqrt of -ve value returns null instead of throwing an error
> -----------------------------------------------------------
>
> Key: HIVE-5473
> URL: https://issues.apache.org/jira/browse/HIVE-5473
> Project: Hive
> Issue Type: Bug
> Affects Versions: 0.11.0
> Reporter: N Campbell
> Priority: Minor
>
> select sqrt( -4 ) from t
> will return a null instead of throwing an exception.
> no discussion on web page that this would be by design to not throw an error.
> https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-DateFunctions
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