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Date: Tue, 8 Nov 2016 23:14:00 +0000 (UTC)
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Subject: [jira] [Commented] (FLINK-3702) DataStream API PojoFieldAccessor
 doesn't support nested POJOs
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archived-at: Tue, 08 Nov 2016 23:14:03 -0000


    [ https://issues.apache.org/jira/browse/FLINK-3702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15649144#comment-15649144 ] 

ASF GitHub Bot commented on FLINK-3702:
---------------------------------------

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

    https://github.com/apache/flink/pull/2094#discussion_r87096436
  
    --- Diff: flink-streaming-java/src/main/java/org/apache/flink/streaming/api/datastream/KeyedStream.java ---
    @@ -337,37 +337,43 @@ public KeyedStream(DataStream<T> dataStream, KeySelector<T, KEY> keySelector, Ty
     	 * per key.
     	 *
     	 * @param positionToSum
    -	 *            The position in the data point to sum
    +	 *            The field position in the data points to sum. This is applicable to
    +	 *            Tuple types, basic and primitive array types, Scala case classes,
    --- End diff --
    
    Not sure if we should document the behavior that we might remove soon. 
    I'd rather have this as undocumented feature and open a JIRA issue to either add the documentation or remove the support for arrays and `0` for atomic types. What do you think @mbalassi?
    
    Same applies for all other Java / ScalaDocs.


> DataStream API PojoFieldAccessor doesn't support nested POJOs
> -------------------------------------------------------------
>
>                 Key: FLINK-3702
>                 URL: https://issues.apache.org/jira/browse/FLINK-3702
>             Project: Flink
>          Issue Type: Improvement
>          Components: DataStream API
>    Affects Versions: 1.0.0
>            Reporter: Robert Metzger
>            Assignee: Gabor Gevay
>
> The {{PojoFieldAccessor}} (which is used by {{.sum(String)}} and similar methods) doesn't support nested POJOs right now.
> As part of FLINK-3697 I'll add a check for a nested POJO and fail with an exception.



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