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https://issues.apache.org/jira/browse/DRILL-4281?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15175917#comment-15175917
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ASF GitHub Bot commented on DRILL-4281:
---------------------------------------

Github user jacques-n commented on the pull request:

    https://github.com/apache/drill/pull/400#issuecomment-191318449
  
    Something like (1). Basically you're using multiple options plus string 
encoding to structure the configuration information. I'm proposing that we come 
up with a descriptive structure. 
    
    For example: 
    [
      {
      principals: { users: ["abc"], groups: [] },
      can_impersonate: {users: ["xyz"], groups: ["g1", "g2"]}
      },
      {
      principals: { users: [], groups: ["g2"] },
      can_impersonate: {users: ["user3", "user4"], groups: []}
      } 
     
    ]
    
    One other note, system/session options shouldn't start with "drill". 


> Drill should support inbound impersonation
> ------------------------------------------
>
>                 Key: DRILL-4281
>                 URL: https://issues.apache.org/jira/browse/DRILL-4281
>             Project: Apache Drill
>          Issue Type: Improvement
>            Reporter: Keys Botzum
>            Assignee: Sudheesh Katkam
>              Labels: doc-impacting, security
>
> Today Drill supports impersonation *to* external sources. For example I can 
> authenticate to Drill as myself and then Drill will access HDFS using 
> impersonation
> In many scenarios we also need impersonation to Drill. For example I might 
> use some front end tool (such as Tableau) and authenticate to it as myself. 
> That tool (server version) then needs to access Drill to perform queries and 
> I want those queries to run as myself, not as the Tableau user. While in 
> theory the intermediate tool could store the userid & password for every user 
> to the Drill this isn't a scalable or very secure solution.
> Note that HS2 today does support inbound impersonation as described here:  
> https://issues.apache.org/jira/browse/HIVE-5155 
> The above is not the best approach as it is tied to the connection object 
> which is very coarse grained and potentially expensive. It would be better if 
> there was a call on the ODBC/JDBC driver to switch the identity on a existing 
> connection. Most modern SQL databases (Oracle, DB2) support such function.



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