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https://issues.apache.org/jira/browse/BEAM-2747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16121112#comment-16121112
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James Xu commented on BEAM-2747:
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[~mingmxu] I think the Adapter strategy should work.
Although AggregateFunctionImpl.create() only take one Class parameter. But we
can copy the implementation out, make some modification, make it accept a
CombineFn instance.
> accept CombineFn as UDAF
> ------------------------
>
> Key: BEAM-2747
> URL: https://issues.apache.org/jira/browse/BEAM-2747
> Project: Beam
> Issue Type: Sub-task
> Components: dsl-sql
> Reporter: Xu Mingmin
> Assignee: Xu Mingmin
> Labels: dsl_sql_merge, dsl_sql_review
>
> refer to
> https://docs.google.com/document/d/1VlAqKLhQua6YpR42KuziIYHTB1FfQTi16Mh88MEYBsU/edit?disco=AAAABTmjhgo
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