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Posted to dev@flink.apache.org by "Timo Walther (Jira)" <ji...@apache.org> on 2021/12/16 08:54:00 UTC

[jira] [Created] (FLINK-25341) Improve casting structured type to STRING

Timo Walther created FLINK-25341:
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             Summary: Improve casting structured type to STRING
                 Key: FLINK-25341
                 URL: https://issues.apache.org/jira/browse/FLINK-25341
             Project: Flink
          Issue Type: Sub-task
          Components: Table SQL / Planner
            Reporter: Timo Walther


Structured types currently use ROW to STRING logic. However, this is not very useful for users as the field order might be determined by Flink. Also, structured types has the nice property of defining a custom {{toString}} and attribute names.

I would suggest the following:

If the structured type has a {{StructuredType.getImplementationClass}} convert to external class and call {{toString}}.

If no implementation class is present, use the string representation of maps.



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