Github user kbotzum commented on the pull request: https://github.com/apache/drill/pull/400#issuecomment-192320077 One suggestion. The terms I use when discussing the concepts with customers are Drill inbound impersonation and Drill outbound impersonation. That is absolutely clear. It does imply implementation to a bit but I think makes intent very clear. You can then derive other terms from that such as "can_impersonate_inbound" and "principals_authorized_for_inbound_impersonation." Yea, really wording but very clear. We can of course shorten to "princ_auth_inbound_imper" in code. Would that make sense? By the way the use of the termed chained in the context of security usually implied something like chained delegation which makes me think of a security identity that is both end to end secure like kerberos and includes all identities that were passed through. That's not this so I'd avoid use of the term chained.
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