这个在 1.14 已经支持了, 详见 FLINK-20487

On 9/28/21, Liu Join <lzy139...@outlook.com> wrote:
> 我将数据流进行去重后,无法进行窗口聚合操作,一直报错GroupWindowAggregate doesn't support consuming
> update and delete changes which is produced by node Deduplicate
>

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