[jira] [Created] (FLINK-6361) Finalize the AggregateFunction interface and refactoring built-in aggregates

[Shang Yuanchun (Jira)]

Shaoxuan Wang created FLINK-6361:
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             Summary: Finalize the AggregateFunction interface and refactoring built-in aggregates
                 Key: FLINK-6361
                 URL: https://issues.apache.org/jira/browse/FLINK-6361
             Project: Flink
          Issue Type: Sub-task
          Components: Table API & SQL
            Reporter: Shaoxuan Wang
            Assignee: Shaoxuan Wang


We have completed codeGen for all aggregate runtime functions. Now we can finalize the AggregateFunction. This includes 1) remove Accumulator trait; 2) remove accumulate, retract, merge, resetAccumulator, getAccumulatorType methods from interface, and allow them as contracted methods for UDAGG; 3) refactoring the built-in aggregates accordingly.



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