[jira] [Updated] (HIVE-2171) Allow custom serdes to set field comments

["John Sichi (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-2171?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

John Sichi updated HIVE-2171:
-----------------------------

    Status: Open  (was: Patch Available)

I tried applying the patch against trunk for testing, but hit some conflicts...can you rebase?

Also, @Yongqiang:  do you have any more comments on this one?


> Allow custom serdes to set field comments
> -----------------------------------------
>
>                 Key: HIVE-2171
>                 URL: https://issues.apache.org/jira/browse/HIVE-2171
>             Project: Hive
>          Issue Type: Improvement
>    Affects Versions: 0.7.0
>            Reporter: Jakob Homan
>            Assignee: Jakob Homan
>         Attachments: HIVE-2171.patch
>
>
> Currently, while serde implementations can set a field's name, they can't set its comment.  These are set in the metastore utils to {{(from deserializer)}}.  For those serdes that can provide meaningful comments for a field, they should be propagated to the table description.  These serde-provided comments could be prepended to "(from deserializer)" if others feel that's a meaningful distinction.  This change involves updating {{StructField}} to support a (possibly null) comment field and then propagating this change out to the myriad places {{StructField}} is thrown around.

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