[jira] [Work logged] (HIVE-21721) nvl function fail with NullPointerException if the two paramtype are different

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-21721?focusedWorklogId=443229&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-443229 ]

ASF GitHub Bot logged work on HIVE-21721:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 09/Jun/20 16:44
            Start Date: 09/Jun/20 16:44
    Worklog Time Spent: 10m 
      Work Description: github-actions[bot] commented on pull request #623:
URL: https://github.com/apache/hive/pull/623#issuecomment-641143476


   This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.
   Feel free to reach out on the dev@hive.apache.org list if the patch is in need of reviews.


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Issue Time Tracking
-------------------

    Worklog Id:     (was: 443229)
    Time Spent: 0.5h  (was: 20m)

> nvl function fail with NullPointerException if the two paramtype are different
> ------------------------------------------------------------------------------
>
>                 Key: HIVE-21721
>                 URL: https://issues.apache.org/jira/browse/HIVE-21721
>             Project: Hive
>          Issue Type: Bug
>          Components: Parser
>    Affects Versions: 1.1.0
>            Reporter: philipse
>            Assignee: philipse
>            Priority: Blocker
>              Labels: pull-request-available
>         Attachments: image-2019-05-11-10-41-05-168.png, image-2019-05-12-23-47-49-401.png
>
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> Hi all
> when i user nvl and case when fucntion, it behaviors like the following.which is weird to me, and makes me headache everytime. i need to check where the nullpointexception throws out when it hadppens,So can the reasons more friendly to users,
> !image-2019-05-11-10-41-05-168.png!
> {code:java}
> select nvl(cast('2019-05-10 11:11:11,111' as timestamp),'2019-05-10 11:11:11,111');
> Error: Error while compiling statement: FAILED: NullPointerException null (state=42000,code=40000)
> {code}



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