[jira] [Created] (FLINK-14015) Introduce PythonScalarFunctionOperator as a standalone StreamOperator for Python ScalarFunction execution

[Shang Yuanchun (Jira)]

Dian Fu created FLINK-14015:
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             Summary: Introduce PythonScalarFunctionOperator as a standalone StreamOperator for Python ScalarFunction execution
                 Key: FLINK-14015
                 URL: https://issues.apache.org/jira/browse/FLINK-14015
             Project: Flink
          Issue Type: Sub-task
          Components: API / Python
            Reporter: Dian Fu
             Fix For: 1.10.0


PythonScalarFunctionOperator is a standalone StreamOperator and it doesn’t need to how the Python ScalarFunctions are executed which is the responsibility of PythonScalarFunctionRunner:
 # It is a StreamOperator which employs PythonScalarFunctionRunner for Python ScalarFunction execution
 # It sends input elements to PythonScalarFunctionRunner, fetches the execution results, constructs the result rows and sends them to the downstream operator
 # It should handle the checkpoint and watermark properly



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