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https://issues.apache.org/jira/browse/HIVE-17240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16115693#comment-16115693
 ] 

ASF GitHub Bot commented on HIVE-17240:
---------------------------------------

GitHub user wangyum opened a pull request:

    https://github.com/apache/hive/pull/221

    [HIVE-17240] ACOS(2) and ASIN(2) should be null

    see: https://issues.apache.org/jira/browse/HIVE-17240

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/wangyum/hive HIVE-17240

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/hive/pull/221.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #221
    
----
commit fe1afe47e26350ff47424957bd78f06bdfe49533
Author: Yuming Wang <wgy...@gmail.com>
Date:   2017-08-03T09:47:05Z

    acos(2) should be null

commit 630042704cdadaf69a7afe49ffafb3c4af91a3b8
Author: Yuming Wang <wgy...@gmail.com>
Date:   2017-08-04T05:16:02Z

    asin(2) should be null

commit bee3c0eb6630a692093d231a3b7d3f842bfc1144
Author: Yuming Wang <wgy...@gmail.com>
Date:   2017-08-06T07:29:23Z

    Fix test error

----


> function ACOS(2) and ASIN(2) should be null
> -------------------------------------------
>
>                 Key: HIVE-17240
>                 URL: https://issues.apache.org/jira/browse/HIVE-17240
>             Project: Hive
>          Issue Type: Bug
>          Components: UDF
>    Affects Versions: 1.1.1, 1.2.2, 2.2.0
>            Reporter: Yuming Wang
>            Assignee: Yuming Wang
>         Attachments: HIVE-17240.1.patch, HIVE-17240.2.patch, 
> HIVE-17240.3.patch
>
>
> {{acos(2)}} should be null, same as MySQL:
> {code:sql}
> hive> desc function extended acos;
> OK
> acos(x) - returns the arc cosine of x if -1<=x<=1 or NULL otherwise
> Example:
>   > SELECT acos(1) FROM src LIMIT 1;
>   0
>   > SELECT acos(2) FROM src LIMIT 1;
>   NULL
> Time taken: 0.009 seconds, Fetched: 6 row(s)
> hive> select acos(2);
> OK
> NaN
> Time taken: 0.437 seconds, Fetched: 1 row(s)
> {code}
> {code:sql}
> mysql>  select acos(2);
> +---------+
> | acos(2) |
> +---------+
> |    NULL |
> +---------+
> 1 row in set (0.00 sec)
> {code}



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