[jira] [Created] (FLINK-15588) check registered udf via catalog API cannot be a scala inner class

[Bowen Li (Jira)]

Bowen Li created FLINK-15588:
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             Summary: check registered udf via catalog API cannot be a scala 
inner class
                 Key: FLINK-15588
                 URL: https://issues.apache.org/jira/browse/FLINK-15588
             Project: Flink
          Issue Type: Improvement
          Components: Table SQL / API
            Reporter: Bowen Li
             Fix For: 1.11.0


scala inner class cannot be instantiated via reflection directly. thus they 
cannot be catalog functions stored as full class name. 

we should check that in catalog API to make sure we remind users of it with 
proper error messages



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