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From "Jiayi Liu (Jira)" <j...@apache.org>
Subject [jira] [Created] (RANGER-2893) show grant on database xxx will fail in ranger hive plugin
Date Fri, 03 Jul 2020 14:02:00 GMT
Jiayi Liu created RANGER-2893:
---------------------------------

             Summary: show grant on database xxx will fail in ranger hive plugin
                 Key: RANGER-2893
                 URL: https://issues.apache.org/jira/browse/RANGER-2893
             Project: Ranger
          Issue Type: Bug
          Components: plugins
    Affects Versions: 2.0.0
            Reporter: Jiayi Liu
             Fix For: 2.1.0


When we enable Ranger Hive plugin, show grant at the database level will fail, and throw the
exception "RangerHiveAuthorizer.showPrivileges() only supports SHOW PRIVILEGES for Hive resources
and not user level". Although we are not showing grants at the user level, but at the database
level.

For example, 
{code:sql}
show grant on database default;
{code}
and the exception,
{code:java}
ERROR : FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask.
RangerHiveAuthorizer.showPrivileges() error: RangerHiveAuthorizer.showPrivileges() only supports
SHOW PRIVILEGES for Hive resources and not user level
{code}

The reason is that the parameter privObj.objectName passed to RangerHiveAuthorizer.showPrivileges
is null when show grant at the datatabase level, and the exception "RangerHiveAuthorizer.showPrivileges()
only supports SHOW PRIVILEGES for Hive resources and not user level" will be thrown when objectName
is null. The function is normal when the type of privObj is TABLE, because the dbName is the
db name and the objectName is the table name. 

We should check whether the dbName is null instead of check the objectName. We alse need to
fix the objectName to "*" when it is null to represent all tables in the db in HivePrivilegeInfo.



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