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[帮助文档] 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。

这个问题是由于Flink的Table API在处理MySQL数据时，将MULTISET类型的字段转换为了JSON格式

flink1.14.5我用table api从mysql写入es，mysql源中有一个字段通过collect聚合函数默认得到了MULTISET类型，该字段需要对应输出到es的array类型中，但是报错：Exception in thread "main" java.lang.UnsupportedO...

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[帮助文档] 实时计算Flink版集成物联网平台数据的连接器

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...

[帮助文档] 通过实时计算Flink集成向量数据

云原生数据仓库AnalyticDB PostgreSQL版支持通过flink-adbpg-connector集成向量化数据。本文以将Kafka数据导入至AnalyticDB PostgreSQL版为例，介绍如何将向量数据导入AnalyticDB PostgreSQL版。

[帮助文档] 通过实时计算Flink读写云原生数据仓库AnalyticDB PostgreSQL版数据

云原生数据仓库AnalyticDB PostgreSQL版支持通过实时计算Flink读写数据。本文介绍如何通过Flink写入数据到AnalyticDB PostgreSQL版及读取AnalyticDB PostgreSQL版数据。

flink sql/table watermark 迟到数据有办法获取到吗，有老师能给指点?

flink sql/table watermark 迟到数据有办法获取到吗，有老师能给指点指点吗？

hello 大佬们，问下flink cdc table落地到hudi table, 数据的有序

hello 大佬们，问下flink cdc table落地到hudi table, 数据的有序性有保障吗？我使用的connector是 tidb-cdc

flink 批处理使用table去读取MySQL的数据，报这个

java.lang.IllegalStateException: MiniCluster is not yet running or has already been shut down.

flink table同时作为写出及输入时下游无数据

各位大佬好，请教一个问题，就是在flink内部定义一个表g_unit(初始为空)，接受一个kafka源的写入，同时g_unit又要作为下游表g_summary的输入源，测试发现g_line表一直不会写入数据，代码如下，烦请大佬解答。 from pyflink.datastream import St...

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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