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https://issues.apache.org/jira/browse/FLINK-24473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17425647#comment-17425647
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Jark Wu commented on FLINK-24473:
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>From the exception message, the field type is int type, so you can't use
>{{getString}}. You should use {{getInt()}} can cast to string instead.
If you are looking for a more general way to convert any type into string, you
use {{org.apache.flink.table.data.RowData#createFieldGetter}} to get a
{{FieldGetter}} which can get an Object from the RowData, and then use
{{toString}} on the object.
> getString value from any datatype columns
> -----------------------------------------
>
> Key: FLINK-24473
> URL: https://issues.apache.org/jira/browse/FLINK-24473
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / API
> Affects Versions: 1.12.4
> Reporter: Spongebob
> Priority: Minor
> Attachments: image-2021-10-07-21-17-20-192.png
>
>
> Hope flink would support getting string value from any other datatype column,
> such as from int、decimal column. At current flink would throw cast exception
> when we do that.
>
> !image-2021-10-07-21-17-20-192.png!
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