[jira] [Resolved] (DERBY-6411) Minimal select privilege should be checked in subqueries

["Knut Anders Hatlen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DERBY-6411?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Knut Anders Hatlen resolved DERBY-6411.
---------------------------------------

       Resolution: Fixed
    Fix Version/s: 10.11.0.0
                   10.10.1.3

> Minimal select privilege should be checked in subqueries
> --------------------------------------------------------
>
>                 Key: DERBY-6411
>                 URL: https://issues.apache.org/jira/browse/DERBY-6411
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.10.1.1
>            Reporter: Knut Anders Hatlen
>            Assignee: Knut Anders Hatlen
>             Fix For: 10.10.1.3, 10.11.0.0
>
>         Attachments: d6411-1a.diff
>
>
> DERBY-4191 added checks for minimal select privilege in cases where a SELECT query didn't access any actual column in the base table, such as SELECT COUNT(*) FROM USER1.T and SELECT 1 FROM USER1.T. That privilege checking is only done for top-level SELECT statements. It should also be done for subqueries.
> Examples of queries where Derby does not currently check for minimal select privileges on the accessed tables (performed as USER2, which has no privileges on any of USER1's tables):
> SELECT * FROM (SELECT COUNT(*) FROM USER1.T) S
> SELECT 1 FROM USER1.T UNION SELECT 2 FROM USER1.T
> INSERT INTO USER2.T SELECT 1 FROM USER1.T
> I believe that the above statements should have failed, but currently they succeed.



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