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From "Sean Busbey (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-2439) Add a NOT (!) operator to ColumnVisibility
Date Fri, 07 Mar 2014 19:19:43 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-2439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13924236#comment-13924236
] 

Sean Busbey commented on ACCUMULO-2439:
---------------------------------------

Hi Joe!

Thanks for the contribution. Could you post it to [the Apache review board|https://reviews.apache.org/]
so it's easier to gather feedback?

> Add a NOT (!) operator to ColumnVisibility
> ------------------------------------------
>
>                 Key: ACCUMULO-2439
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2439
>             Project: Accumulo
>          Issue Type: New Feature
>          Components: master
>    Affects Versions: 1.5.1
>            Reporter: Joe Ferner
>            Priority: Minor
>              Labels: patch, security
>         Attachments: ACCUMULO_2439.patch
>
>
> This patch adds a NOT "!" operator to ColumnVisibility.
> The syntax is as follows:
> !a
> (!a)&(!b)
> a&(!b)
> a&(!(b|c))
> Because of the nature of the current visibility parsing algorithm the additional parentheses
are required.
> In the shell, the "!" requires escaping. This is due to how JLine parses the command
and attempts to substitute "!" with history.



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