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From "pietro pinoli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-1963) Improve distinct() transformation
Date Mon, 13 Jul 2015 23:58:05 GMT

    [ https://issues.apache.org/jira/browse/FLINK-1963?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14625600#comment-14625600
] 

pietro pinoli commented on FLINK-1963:
--------------------------------------

[~fhueske] Dear Fabian,
I made the changes to the code.

I would really love to get also your feedback and some guidelines for updating the documentation
and the test section.

Cheers,
Pietro

> Improve distinct() transformation
> ---------------------------------
>
>                 Key: FLINK-1963
>                 URL: https://issues.apache.org/jira/browse/FLINK-1963
>             Project: Flink
>          Issue Type: Improvement
>          Components: Java API, Scala API
>    Affects Versions: 0.9
>            Reporter: Fabian Hueske
>            Assignee: pietro pinoli
>            Priority: Minor
>              Labels: starter
>             Fix For: 0.9
>
>
> The `distinct()` transformation is a bit limited right now with respect to processing
atomic key types:
> - `distinct(String ...)` works only for composite data types (POJO, tuple), but wildcard
expression should also be supported for atomic key types
> - `distinct()` only works for composite types, but should also work for atomic key types
> - `distinct(KeySelector)` is the most generic one, but not very handy to use
> - `distinct(int ...)` works only for Tuple data types (which is fine)
> Fixing this should be rather easy.



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