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https://issues.apache.org/jira/browse/PIG-987?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12763361#action_12763361
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Yan Zhou commented on PIG-987:
------------------------------

I don't think the owner name is a problem because in this release it has no 
effect at all.

The log complains about "chgrp changing group ... is not permitted".  Can you 
chgrp a local FS  file to a group called "users" on your box?

> [zebra] Zebra Column Group Access Control
> -----------------------------------------
>
>                 Key: PIG-987
>                 URL: https://issues.apache.org/jira/browse/PIG-987
>             Project: Pig
>          Issue Type: New Feature
>    Affects Versions: 0.6.0
>            Reporter: Yan Zhou
>            Assignee: Yan Zhou
>         Attachments: ColumnGroupSecurity.patch, ColumnGroupSecurity.patch, 
> TEST-org.apache.hadoop.zebra.io.TestCheckin.txt, 
> TEST-org.apache.hadoop.zebra.mapred.TestCheckin.txt, tmp-987-plus-991.patch
>
>
> Access Control: when processes try to read from the column groups, Zebra 
> should be able to handle allowed vs. disallowed user/application accesses.  
> The security is eventuallt granted by corresponding  HDFS security of the 
> data stored.
> Expected behavior when column group permissions are set:
>     When user selects only columns that they do not have permissions to 
> access, Zebra should return error with message "Error #: Permission denied 
> for accessing column <column name or names> 
> Access control applies to an entire column group, so all columns in a column 
> group have same permissions. 

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