Csaba Ringhofer created IMPALA-10326:
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             Summary: PrincipalPrivilegeTree doesn't handle emtry string and 
wildcards correctly
                 Key: IMPALA-10326
                 URL: https://issues.apache.org/jira/browse/IMPALA-10326
             Project: IMPALA
          Issue Type: Bug
          Components: Catalog
            Reporter: Csaba Ringhofer


Two bugs slipped through the tests in IMPALA-9242:
1. It assumes that unfilled elements in a privilege (e.g. table in a database 
privilege) are null, which is true in FE tests, but it is an empty string when 
the privilege comes from SentryPrivilege.
2. wildcards (e.g. * in server=server1->db=tpcds->table=*) are not handled well 
in the tree - it will be added as a table level privilege, while it should be 
added as a database-wide privilege



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