flink sql hop使用udaf问题

[bigdata]

你好：

    flink1.10.1使用sql hop函数中使用udaf函数，报错如下，如何解决，已经有marge方法。

org.apache.flink.table.api.ValidationException: Function class 'com.autoai.cns.udaf.PercentileUDAF' does not implement at least one method named 'merge' which is public, not abstract and (in case of table functions) not static