[jira] [Commented] (HIVE-21034) Add option to schematool to drop Hive databases

["Daniel Voros (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-21034?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16781572#comment-16781572 ] 

Daniel Voros commented on HIVE-21034:
-------------------------------------

Attached patch #3 that is rebased on master (classes moved in HIVE-21298) and also moves the "yes" handling to the task as suggested by Miklos.

[~mgergely] I've seen NPEs there when {{MetastoreSchemaTool#init()}} failed before (or during) setting cmdLine, that's why I've added the null-check.

[~ashutoshc], [~alangates] could you please also take a look?

> Add option to schematool to drop Hive databases
> -----------------------------------------------
>
>                 Key: HIVE-21034
>                 URL: https://issues.apache.org/jira/browse/HIVE-21034
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Daniel Voros
>            Assignee: Daniel Voros
>            Priority: Major
>         Attachments: HIVE-21034.1.patch, HIVE-21034.2.patch, HIVE-21034.2.patch, HIVE-21034.3.patch
>
>
> An option to remove all Hive managed data could be a useful addition to {{schematool}}.
> I propose to introduce a new flag {{-dropAllDatabases}} that would *drop all databases with CASCADE* to remove all data of managed tables.



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