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From "Dag H. Wanvik (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-5292) SQLAuthorisation and views
Date Thu, 30 Jun 2011 10:14:28 GMT

    [ https://issues.apache.org/jira/browse/DERBY-5292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13057736#comment-13057736
] 

Dag H. Wanvik commented on DERBY-5292:
--------------------------------------

Actually, the patch only solved the first failing case in the repro, so the patch is insufficient.


> SQLAuthorisation and views
> --------------------------
>
>                 Key: DERBY-5292
>                 URL: https://issues.apache.org/jira/browse/DERBY-5292
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.7.1.1
>         Environment: windows xp
>            Reporter: Thomas Hill
>         Attachments: derby5292a.diff, output.txt, script.txt
>
>
> Hi,
> in some cases there seem to be issues with SQLAuthorisation in conjunction with database
VIEWS.
> Please see attached files as repro (script.txt has only the SQL I executed, output is
the output resulting when running the script). 
> I would think identical results should be returned in all cases and independent on how
the view has been defined, but this to my surprise not being the case:
> 1) Trying to select from view appl."VW_MyTasks" - which is a simple view defined on just
one table - leads to expected results, i.e. "my" tasks are being returned.
> 2) Trying to select from view appl."VW_MyPriorityTasks - which is a view defined on two
joined tables without using an inner join clause - leads to expected results, i.e. "my" priority
tasks are being returned.
> 3) Trying to select from view appl."VW2_MyPriorityTasks - which is the same view but
now the two tables joined using an inner join clause - leads to an error and no tasks returned
(when the same results as in 2) above were expected).
> 4) Trying to select from view appl."VW3_MyPriorityTasks" - which is a view defined using
a subselect - also unexpectedly leads to an error.
> Note: While I could rewrite each inner join clause with changing the syntax like in 2)
above, this provides a simple work-around for such cases. May be there is a work-around for
subselects also (not sure if every subselect could be rewritten to a join?). However when
depending on using EXISTS constructs in the query there unfortunately is no way (I would know
of) to get around this problem. Unfortuanetly a view that makes use of EXISTS is also one
I would need to define in my data base...
> Thanks

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