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https://issues.apache.org/jira/browse/FLINK-553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14035878#comment-14035878 ]
Robert Metzger commented on FLINK-553:
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aalexandrov will post again here, when he starts working on the issue. it has currently a low priority on his TODO list.
> Add getGroupKey() method to group-at-time operators
> ---------------------------------------------------
>
> Key: FLINK-553
> URL:
https://issues.apache.org/jira/browse/FLINK-553> Project: Flink
> Issue Type: Improvement
> Reporter: GitHub Import
> Labels: github-import
> Fix For: pre-apache
>
>
> Group-at-a-time operators (Reduce & CoGroup) work on multiple records in one UDF call. Often these UDFs need to access the key that is common to all records of a group.
> We could add a function to set a the key of a group before the UDF is called (``setGroupKey()``) and a function to get the key (``getGroupKey()``) that can be called from the UDF.
> What do you think about this?
> ---------------- Imported from GitHub ----------------
> Url:
https://github.com/stratosphere/stratosphere/issues/553> Created by: [fhueske|
https://github.com/fhueske]
> Labels: enhancement, java api, scala api, user satisfaction,
> Assignee: [aalexandrov|
https://github.com/aalexandrov]
> Created at: Mon Mar 10 22:28:27 CET 2014
> State: open
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