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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-1032) Extend POJO Field Selectors to Support Accessing Nested Objects
Date Mon, 06 Oct 2014 11:31:34 GMT

    [ https://issues.apache.org/jira/browse/FLINK-1032?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14160205#comment-14160205

ASF GitHub Bot commented on FLINK-1032:

Github user aljoscha commented on a diff in the pull request:

    --- Diff: flink-tests/src/test/java/org/apache/flink/test/exampleScalaPrograms/PageRankITCase.java
    @@ -18,19 +18,19 @@
     package org.apache.flink.test.exampleScalaPrograms;
    +import java.io.FileNotFoundException;
    +import java.io.IOException;
    +import java.util.Collection;
    +import java.util.LinkedList;
     import org.apache.flink.configuration.Configuration;
    -import org.apache.flink.examples.scala.graph.PageRankBasic;
    +import org.apache.flink.examples.java.graph.PageRankBasic;
    --- End diff --
    Should also still use the Scala example.

> Extend POJO Field Selectors to Support Accessing Nested Objects
> ---------------------------------------------------------------
>                 Key: FLINK-1032
>                 URL: https://issues.apache.org/jira/browse/FLINK-1032
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Java API
>            Reporter: Aljoscha Krettek
>            Assignee: Robert Metzger
> Right now you can only use fields of the top-level object as key fields in groupings,
joins, and co-group. This should be extended to allow using nested fields. We have to be careful
with null fields, though.

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