Fredy Wijaya has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/9589 )

Change subject: IMPALA-6643: Add REFRESH METADATA fine-grained privilege
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Patch Set 8:

(3 comments)

http://gerrit.cloudera.org:8080/#/c/9589/8//COMMIT_MSG
Commit Message:

http://gerrit.cloudera.org:8080/#/c/9589/8//COMMIT_MSG@15
PS8, Line 15: REFRESH METADATA
> Just thinking out loud, should we rename it to RELOAD METADATA? From a user
We had few internal discussions on what name we should use. Initially it was 
simply "REFRESH", but then we decided to change it to "REFRESH METADATA". I 
guess it's to mean a privilege for both "REFRESH" and "INVALIDATE METADATA". 
I'm open to suggestion though.


http://gerrit.cloudera.org:8080/#/c/9589/8/fe/src/main/java/org/apache/impala/authorization/Privilege.java
File fe/src/main/java/org/apache/impala/authorization/Privilege.java:

http://gerrit.cloudera.org:8080/#/c/9589/8/fe/src/main/java/org/apache/impala/authorization/Privilege.java@54
PS8, Line 54:   public enum SentryAction implements Action {
> Just to be sure, these Impala specific privilege grants to groups are ignor
That's correct.


http://gerrit.cloudera.org:8080/#/c/9589/8/fe/src/test/java/org/apache/impala/analysis/AuthorizationTest.java
File fe/src/test/java/org/apache/impala/analysis/AuthorizationTest.java:

http://gerrit.cloudera.org:8080/#/c/9589/8/fe/src/test/java/org/apache/impala/analysis/AuthorizationTest.java@249
PS8, Line 249:     roleName = "refresh_functional_alltypesagg";
> I think you could keep a single role (say "refresh_metadata_role") and keep
Yup, you're right if we only consider using Sentry Service. We can easily 
switch between roles. With Sentry authorization policy file, we have no way of 
switching roles. I believe the idea to keep the roles match between Sentry 
Service and Sentry authorization file is for readability although it may be 
redundant for Sentry service.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I4c3c5a51fe493d39fd719c7a388d4d5760049ce4
Gerrit-Change-Number: 9589
Gerrit-PatchSet: 8
Gerrit-Owner: Fredy Wijaya <[email protected]>
Gerrit-Reviewer: Adam Holley <[email protected]>
Gerrit-Reviewer: Bharath Vissapragada <[email protected]>
Gerrit-Reviewer: Fredy Wijaya <[email protected]>
Gerrit-Reviewer: Vuk Ercegovac <[email protected]>
Gerrit-Comment-Date: Thu, 15 Mar 2018 02:50:40 +0000
Gerrit-HasComments: Yes

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