实时计算 Flink版聚合接收的相关内容

阿里云文档 2026-02-02

多种实时数据聚合方案对比选择-实时计算 Flink版-阿里云

本文将为您介绍三种实时聚合的方案，也是技术递进的过程，适用于不同的场景。

阿里云文档 2026-02-02

使用UDAF实现数据排序和聚合

本文提供了一个自定义聚合函数（UDAF），实现将多行数据合并为一行并按照指定列进行排序，并以居民用电户电网终端数据为例，介绍如何在实时计算控制台使用该函数进行数据聚合和排序。

阿里云文档 2025-06-05

窗口聚合

实时计算Flink版的窗口聚合支持老语法分组窗口聚合（Group Window Aggregation）和新语法窗口表值函数聚合（Window TVF Aggregation）两种形式。本文为您介绍窗口聚合新老语法详情、窗口表值函数和聚合语句无法合并的场景、以及新老语法对更新流的支持情况。

阿里云文档 2023-06-01

如何针对资讯聚合类业务场景搭建基于云消息队列Kafka版和实时计算Flink的实时数仓

本文介绍如何针对资讯聚合类业务场景搭建基于云消息队列 Kafka 版和实时计算Flink的实时数仓。

问答 2018-12-11 来自：开发者社区

Flink - 如何在多个任务槽中聚合和查询富接收器功能状态

我实现了一个rich sink函数，它根据调用的对象执行一些网络调用。我希望能够计算这些事件的一些元数据，这些事件由事件中包含的某些上下文信息（事件的batchID）键入，并将此元数据公开给外部系统。例如，事件如下所示：case class MyEvent(batchId: String, eventId: String, moreInformation: ...)class MySink(......

问答 2018-12-11 来自：开发者社区

Flink窗口：聚合和输出到接收器

我们有一个数据流，其中每个元素都是这种类型： id: Stringtype: Typeamount: Integer我们希望聚合此流并输出amount每周一次的总和。当前解决方案示例flink管道将如下所示： stream.keyBy(type) .window(TumblingProcessingTimeWindows.of(Time.days(7))) .reduce(sumAm...

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更新时间 2024-03-05 12:25:30

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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