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https://issues.apache.org/jira/browse/HIVE-78?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12923667#action_12923667
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He Yongqiang commented on HIVE-78:
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The other option we came up from offline discussion is the rule of "one accept 
then accept" but in a hierarchy style. First check privileges granted the user 
and groups. One accept then accept; One deny then deny. And then check role 
level privileges, one accept then accept; one deny then deny.

We prefer to go with this rule. Please comment, and if no concerns on this, i 
will update the wiki.

> Authorization infrastructure for Hive
> -------------------------------------
>
>                 Key: HIVE-78
>                 URL: https://issues.apache.org/jira/browse/HIVE-78
>             Project: Hive
>          Issue Type: New Feature
>          Components: Server Infrastructure
>            Reporter: Ashish Thusoo
>            Assignee: He Yongqiang
>         Attachments: createuser-v1.patch, hive-78-metadata-v1.patch, 
> hive-78-syntax-v1.patch, hive-78.diff
>
>
> Allow hive to integrate with existing user repositories for authentication 
> and authorization infromation.

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