Prasanth Jayachandran commented on HIVE-21254:

Seems like there is flag to allow read access on db and tables. 


Should we set this to false in pre-upgrade tool explicitly to get read access?

> Pre-upgrade tool should handle exceptions and skip db/tables
> ------------------------------------------------------------
>                 Key: HIVE-21254
>                 URL: https://issues.apache.org/jira/browse/HIVE-21254
>             Project: Hive
>          Issue Type: Bug
>          Components: Transactions
>    Affects Versions: 4.0.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>            Priority: Major
>         Attachments: HIVE-21254.1.patch, HIVE-21254.2.patch, 
> HIVE-21254.3.patch, HIVE-21254.4.patch
> When exceptions like AccessControlException is thrown, pre-upgrade tool 
> fails. If hive user does not have read access to database or tables (some 
> external tables denies read access to hive), pre-upgrade tool should just 
> assume they are external tables and move on without failing pre-upgrade 
> process. 

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