实时计算 Flink版aggregatefunction 的相关内容

flink中AggregateFunction 的什么方法在某些场景下是必须实现的？

flink中每个 AggregateFunction 必须要实现的是什么方法？

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Flink 自定义聚合函数 AggregateFunction 不触发

本地sock测试AggregateFunction 生效但是上了flink集群后（连接的kafka源，数据能正常收到）发现AggregateFunction 的getresult方法不触发，而createAccumulator和add均能触发，

社区版的Flink的AggregateFunction的Open函数不被调用？

flink-1.4.2 (使用1.6.2测试过，问题同样存在)自定义一个AggregateFunction，需要在open函数中做一些处理，Intellij调试的时候发现open函数不被调用。由于计算逻辑较复杂，同样用到了udsf和udtf，这两个对象的open函数在调试的时候是可以被调用的，但是u...

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更新时间 2023-05-22 14:58:27

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实时计算Flink版

阿里云实时计算Flink版(Alibaba Cloud Realtime Compute)，完全兼容开源的Apache Flink，比开源性能提升2～3倍，提供了完整的告警、监控、日志的解决方案、提升开发效率且无运维成本，并有社区专家提供技术支持。

立即开通

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实时同步

MySQL 到 Hologres

Kafka 到 Hologres

功能对比

开源Flink对比

成本优化

作业自动调优