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From "Yan Zhou (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-987) [zebra] Zebra Column Group Access Control
Date Wed, 07 Oct 2009 03:51:31 GMT

    [ https://issues.apache.org/jira/browse/PIG-987?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12762854#action_12762854
] 

Yan Zhou commented on PIG-987:
------------------------------

It's because this patch expose the env problem using lzo as compression that 991 eventually
fixes.

Can you commit 991's patch along with this? What are tthe failures from trunk? What are the
error messages?

> [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, TEST-org.apache.hadoop.zebra.mapred.TestCheckin.txt
>
>
> 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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