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From "Hyunsik Choi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAJO-483) Add getParentCount(), getParents(), getParent() functions to DirectedGraph
Date Wed, 08 Jan 2014 14:17:50 GMT

    [ https://issues.apache.org/jira/browse/TAJO-483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13865465#comment-13865465
] 

Hyunsik Choi commented on TAJO-483:
-----------------------------------

+1

The change is straightforward and it includes unit tests.

Regarding this issue, a tree data structure, wrapping a directed graph, would be useful because
it provides users with only a simple tree view.

> Add getParentCount(), getParents(), getParent() functions to DirectedGraph
> --------------------------------------------------------------------------
>
>                 Key: TAJO-483
>                 URL: https://issues.apache.org/jira/browse/TAJO-483
>             Project: Tajo
>          Issue Type: Improvement
>    Affects Versions: 0.8-incubating
>            Reporter: Jihoon Son
>            Assignee: Jihoon Son
>         Attachments: TAJO-483.patch
>
>
> See the title.
> In the current implementation, DirectedGraph provides only getParent() because it assumes
that there is only one parent. However, multiple parents should be supported in DirectedGraph.



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