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Date: Mon, 14 Mar 2016 12:48:33 +0000 (UTC)
From: "ramkrishna.s.vasudevan (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (FLINK-3579) Improve String concatenation
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    [ https://issues.apache.org/jira/browse/FLINK-3579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15193215#comment-15193215 ] 

ramkrishna.s.vasudevan commented on FLINK-3579:
-----------------------------------------------

I created a pull request with a necessary test case. I have a doubt with the 'cast' related change. Do let me know if my approach was right here. 

> Improve String concatenation
> ----------------------------
>
>                 Key: FLINK-3579
>                 URL: https://issues.apache.org/jira/browse/FLINK-3579
>             Project: Flink
>          Issue Type: Bug
>          Components: Table API
>            Reporter: Timo Walther
>            Assignee: ramkrishna.s.vasudevan
>            Priority: Minor
>
> Concatenation of a String and non-String does not work properly.
> e.g. {{f0 + 42}} leads to RelBuilder Exception
> ExpressionParser does not like {{f0 + 42.cast(STRING)}} either.


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