[jira] [Created] (FLINK-20640) Use cython to optimize the logic of Python UDAF

[Shang Yuanchun (Jira)]

Huang Xingbo created FLINK-20640:
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             Summary: Use cython to optimize the logic of Python UDAF
                 Key: FLINK-20640
                 URL: https://issues.apache.org/jira/browse/FLINK-20640
             Project: Flink
          Issue Type: Improvement
          Components: API / Python
            Reporter: Huang Xingbo
             Fix For: 1.13.0






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