Impala Public Jenkins has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/14867 )

Change subject: IMPALA-9222: Speed up show tables/DBs if the user has access to 
parent db/server
......................................................................

IMPALA-9222: Speed up show tables/DBs if the user has access to parent db/server

Currently we always do the auth check for tables/dbs individually.
If the user has privileges higher in the hierarchy then it is not
necessary to do these checks as they will all succeed.

This change adds a higher level check before the individual checks.
The optimization is only enabled for Sentry, as Ranger has deny
policies, so server/db level access does not guarantee db/table level
access.

Testing:
- the existing auth related test coverage seems enough
- there are no tests for deny policies yet - adding them seems a bigger
  task so I created a follow up jira: IMPALA-9252

Change-Id: Ic1f5c5d1cf447a9f1cec46c45272f250b8580826
Reviewed-on: http://gerrit.cloudera.org:8080/14867
Reviewed-by: Impala Public Jenkins <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
---
M fe/src/main/java/org/apache/impala/service/Frontend.java
1 file changed, 53 insertions(+), 6 deletions(-)

Approvals:
  Impala Public Jenkins: Looks good to me, approved; Verified

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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: Ic1f5c5d1cf447a9f1cec46c45272f250b8580826
Gerrit-Change-Number: 14867
Gerrit-PatchSet: 13
Gerrit-Owner: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Quanlong Huang <[email protected]>
Gerrit-Reviewer: Vihang Karajgaonkar <[email protected]>

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