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From "Yan Zhou (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-987) [zebra] Zebra Column Group Access Control
Date Thu, 08 Oct 2009 00:58:31 GMT

    [ https://issues.apache.org/jira/browse/PIG-987?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12763325#action_12763325
] 

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

I see the following errors in your attached log:

chgrp: changing group of `/home/raghu/h/pig-commit/build/contrib/zebra/test/data/TestColumnGroupNullSplits':
Operation not permitted

So I believen your tests has encountered disk permission problems. Note that we are testing
the feature of "column group security" so having property permission settings is necessary
for the tests to pass.

> [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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