在使用Flink SQL开发作业集成物联网平台数据时，需要使用SQL连接器连接物联网平台的数据表（产品属性时序数据、产品事件数据和自定义时序存储表）。物联网平台提供了连接器作为实时计算Flink全托管自定义连接器使用。本文介绍如何使用实时计算Flink版集成物联网平台数据的连接器（IoT Conne...

flink sql写累积窗口开一天每5分钟输出一次数据，为啥最后没有触发计算啊？

在Flink如果一个窗口区间没有数据，是不是不会开窗，就没法使用triggers赋默认值？

在Flink如果一个窗口中没数据，但是在udaf想输出一个默认值有什么好的办法麻？

Flink--8、时间语义、水位线（事件和窗口、水位线和窗口的工作原理、生产水位线、水位线的传递、迟到数据的处理）

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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

产品控制台

产品文档

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