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From "Adam Kramer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3491) Expose column names to UDFs
Date Thu, 20 Sep 2012 08:13:08 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13459436#comment-13459436
] 

Adam Kramer commented on HIVE-3491:
-----------------------------------

Yes, the goal is to have this be eventually exposed.

Having the column names generally available will also help a lot with some of our worse error
messages. :) So even if it is not trivial it is worth taking seriously.
                
> Expose column names to UDFs
> ---------------------------
>
>                 Key: HIVE-3491
>                 URL: https://issues.apache.org/jira/browse/HIVE-3491
>             Project: Hive
>          Issue Type: New Feature
>          Components: Query Processor, UDF
>            Reporter: Adam Kramer
>
> If I run
> SELECT MY_FUNC(a.foo, b.bar) FROM baz1 a JOIN baz2 b;
> ...the parsed query structure (i.e., that "foo" and "bar" are the name of the columns)
should be available to the UDF in some manner.

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