[jira] [Created] (FLINK-4781) Add User Defined Function(UDF) API for DataStream

[Shang Yuanchun (Jira)]

Shaoxuan Wang created FLINK-4781:
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             Summary: Add User Defined Function(UDF) API for DataStream
                 Key: FLINK-4781
                 URL: https://issues.apache.org/jira/browse/FLINK-4781
             Project: Flink
          Issue Type: New Feature
          Components: DataStream API
            Reporter: Shaoxuan Wang


Will update details later



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