[jira] Commented: (HIVE-513) UDFToString bug

["Zheng Shao (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12713740#action_12713740 ] 

Zheng Shao commented on HIVE-513:
---------------------------------

Are you working on the latest trunk? There was a recent change that might have fixed it.

We remove redundant conversion functions at compile time.
I tried "select cast('my string' as string) from mytable;" with the latest trunk and it correctly outputs "my string".


> UDFToString bug
> ---------------
>
>                 Key: HIVE-513
>                 URL: https://issues.apache.org/jira/browse/HIVE-513
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Min Zhou
>            Assignee: Min Zhou
>         Attachments: HIVE-513.patch
>
>
> execute a query like below,
> {noformat}
> select cast('my string' as string) from pokes;
> {noformat}
> you will get the result:
> {noformat}
> NULL
> NULL
> ...
> {noformat}
> the reason is UDFToString hasn't an evaluate method acceptes Text or BytesWritable argument.

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