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https://issues.apache.org/jira/browse/FLINK-24914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17444282#comment-17444282
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xuyang commented on FLINK-24914:
--------------------------------

Hi, [~qingru zhang] . In a sense, it is, but FLIP-154 have not been discussed 
enough I think.

> Support implicit type conversion in SQL like "select int_field = 
> varchar_field"
> -------------------------------------------------------------------------------
>
>                 Key: FLINK-24914
>                 URL: https://issues.apache.org/jira/browse/FLINK-24914
>             Project: Flink
>          Issue Type: Improvement
>            Reporter: xuyang
>            Priority: Minor
>
> Before, "select int_field = varchar_field" will be converted to 
> "BinaryStringData.equals (int xxx)", so we always get FALSE.
> Currently, we temporarily forbid "=" and "<>" between numeric and (var)char 
> fields in SQL API, just like what have been done in Table API.
> In future, we can support the implicit type conversion in Flink SQL and let 
> this kind of SQL have the correct result.



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