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Posted to dev@hive.apache.org by "Edward Capriolo (JIRA)" <ji...@apache.org> on 2013/08/10 06:15:48 UTC

[jira] [Commented] (HIVE-3491) Expose column names to UDFs

    [ https://issues.apache.org/jira/browse/HIVE-3491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13735736#comment-13735736 ] 

Edward Capriolo commented on HIVE-3491:
---------------------------------------

So we are now intitilizing the UDF and passing some context. It should be possible to pass along and acquire this information.
                
> 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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