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https://issues.apache.org/jira/browse/FLINK-5957?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15976502#comment-15976502
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lining commented on FLINK-5957:
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Hi, [~sunjincheng121]
I think `TypeInformation.of(new TypeHint[AGG.type](){})` is not ok, because use
java clazz.getGenericSuperclass(), so type lost, but
`org.apache.flink.streaming.api.scala.createTypeInformation[AGG.type]` is ok,
you can try it
> Remove `getAccumulatorType` method from build-in `AggregateFunction`
> ---------------------------------------------------------------------
>
> Key: FLINK-5957
> URL: https://issues.apache.org/jira/browse/FLINK-5957
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> 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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