[jira] [Created] (FLINK-6725) make requiresOver as a contracted method in udagg

[Shang Yuanchun (Jira)]

Shaoxuan Wang created FLINK-6725:
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             Summary: make requiresOver as a contracted method in udagg
                 Key: FLINK-6725
                 URL: https://issues.apache.org/jira/browse/FLINK-6725
             Project: Flink
          Issue Type: Improvement
          Components: Table API & SQL
            Reporter: Shaoxuan Wang
            Assignee: Shaoxuan Wang


I realized requiresOver is defined in the udagg interface when I wrote up the udagg doc. I would like to put requiresOver as a contract method. This makes the entire udagg interface consistently and clean.



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