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各位大佬我一直有个疑问概念: WaterMark可以理解为是为了解决窗口的触发时#Flink

各位大佬我一直有个疑问概念: WaterMark可以理解为是为了解决窗口的触发时机的问题问题: 如果没有窗口是不是没有WaterMark这个概念了 #Flink

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请问如果想判断某一个数据项的数据发生变化时，触发一个规则，用flink如何实现？

请问如果想判断某一个数据项的数据发生变化时，触发一个规则，用flink如何实现？本问题来自阿里云开发者社区的【11大垂直技术领域开发者社群】。点击这里欢迎加入感兴趣的技术领域群。

当水印小于窗口结束时，触发基于事件时间的Flink窗口操作

我在Flink测试事件时间和水印。以下是我的代码。 object WatermarkTest { def main(args: Array[String]): Unit = { val env = StreamExecutionEnvironment.getExecutionEnvironment ...

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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