[jira] [Created] (FLINK-5957) Remove `getAccumulatorType` method from `AggregateFunction`

[Shang Yuanchun (Jira)]

sunjincheng created FLINK-5957:
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             Summary: Remove  `getAccumulatorType` method from `AggregateFunction`
                 Key: FLINK-5957
                 URL: https://issues.apache.org/jira/browse/FLINK-5957
             Project: Flink
          Issue Type: Sub-task
            Reporter: sunjincheng
            Assignee: sunjincheng


Build-in aggregateFunction need not implement the  `getAccumulatorType` method.
We can get TypeInformation by  `TypeInformation.of() ` or `TypeInformation.of(new TypeHint[AGG.type](){})`.
What do you think? [~fhueske] [~shaoxuan]



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