[jira] [Created] (FLINK-14022) Add validation check for places where Python ScalarFunction cannot be used

[Shang Yuanchun (Jira)]

Dian Fu created FLINK-14022:
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             Summary: Add validation check for places where Python ScalarFunction cannot be used
                 Key: FLINK-14022
                 URL: https://issues.apache.org/jira/browse/FLINK-14022
             Project: Flink
          Issue Type: Sub-task
          Components: API / Python
            Reporter: Dian Fu
             Fix For: 1.10.0


Currently, there are places where Python ScalarFunction could not be used, for example:
 # Python UDF could not be used in MatchRecognize
 # Python UDFs could not be used in Join condition which take the columns from both the left table and the right table as inputs

We should add validation check for places where it’s not supported.



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