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From "Navis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3491) Expose column names to UDFs
Date Thu, 20 Sep 2012 06:35:08 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13459383#comment-13459383
] 

Navis commented on HIVE-3491:
-----------------------------

I've also tried similar thing for UDAF(HIVE-2964), and resigned because it was too confusional(MAP-AGGR,
etc.). But for UDF, it seemed possible.
                
> 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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