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https://issues.apache.org/jira/browse/FLINK-1665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14651688#comment-14651688
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Stephan Ewen commented on FLINK-1665:
-------------------------------------

You can always specify order the following way:

Instead of
{code}
data.groupBy("id").orderBy("name")
{code}

you can do 

{code}
data.groupBy("id").orderBy("name.first", "name.last")
{code}

I feel that getting into order and annotations is a huge thing, for something 
that has very good other solutions.
I'd rather see us fixing more fundamental things.

> Add optional annotations for POJOs to specify the order of fields
> -----------------------------------------------------------------
>
>                 Key: FLINK-1665
>                 URL: https://issues.apache.org/jira/browse/FLINK-1665
>             Project: Flink
>          Issue Type: Improvement
>          Components: JobManager
>    Affects Versions: 0.8.0, 0.9
>            Reporter: Fabian Hueske
>
> The order of fields within a POJO is not well defined. 
> We could provide an optional annotation such as {{@Position(int)}} to enable 
> the definition of field orders.
> The order of fields is relevant when mapping data to POJOs such as when 
> generating POJOs from CSV input, converting POJOs to tuples (for example for 
> the expression API), or when sorting POJOs (see FLINK-1664).



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