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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-1599) TypeComperator with no keys and comparators matches some elements
Date Fri, 02 Oct 2015 09:57:27 GMT

    [ https://issues.apache.org/jira/browse/FLINK-1599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14940973#comment-14940973

ASF GitHub Bot commented on FLINK-1599:

Github user asfgit closed the pull request at:


> TypeComperator with no keys and comparators matches some elements
> -----------------------------------------------------------------
>                 Key: FLINK-1599
>                 URL: https://issues.apache.org/jira/browse/FLINK-1599
>             Project: Flink
>          Issue Type: Bug
>          Components: Distributed Runtime
>    Affects Versions: 0.8.0
>            Reporter: Maximilian Michels
>            Priority: Minor
> If you create a custom type comparator by subclassing {{TypeComperator}} and implement
{{int extractKeys(Object record, Object[] target, int index)}} and {{TypeComparator[] getFlatComparators()}}
to return 0 and no type comparators respectively, the {{coGroup}} operator (possibly others)
find matching elements although no comparators have been specified.
> In this case, the expected behavior for a CoGroup would be that only elements from one
side are supplied in the CoGroup method.

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