问题一：Group Window Aggregate在Flink中有哪些局限性？ Group Window Aggregate在Flink中有哪些局限性？参考回答： Group Window Aggregate在Flink 1.12及更早版本中用于窗口聚合，但其存在两个主要局限性：一是语法不符合SQL标准，需要借助特殊窗口函数和窗口辅助函数；二是窗口...

文章 2024-08-21 来自：开发者社区

OneSQL OLAP实践问题之Flink SQL Gateway的功能如何解决

问题一：在 Onesql OLAP 分析平台的查询流程中，Flink SQL Gateway 扮演了什么角色？在 Onesql OLAP 分析平台的查询流程中，Flink SQL Gateway 扮演了什么角色？参考回答： "在 Onesql OLAP 分析平台的查询流程中，Flink SQL Gateway 负责接收从 OneSQL 后端转发来的...

问答 2024-07-23 来自：开发者社区

(Window TVF) 在Flink SQL中扩展了哪些功能?

Window Table-valued Function (Window TVF) 在Flink SQL中扩展了哪些功能？

问答 2024-01-17 来自：开发者社区

Flink SQL想试一下CEP这个功能，但是CEP不支持更新要加这个数据源变成只追加，咋办？

Flink SQL想试一下CEP这个功能，我读的时候mysql 的表开启了binlog，但是CEP不支持更新要加这个数据源变成只追加这个要如何修改啊？报错：Match Recognize doesn't support consuming update and delete changes which is produced by node TableSourceScan(table=[.....

文章 2024-01-05 来自：开发者社区

Flink SQL提供了行转列的功能，可以通过使用`UNPIVOT`操作来实现

Flink SQL提供了行转列的功能，可以通过使用UNPIVOT操作来实现。UNPIVOT操作可以将行转换为列，它可以将一些列中的值逆规整到行上。例如，假设我们有一个数据表，其中包含id、name和score_math、score_english、score_science等列，我们可以使用以下SQL语句将这些列转换为一列&...

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更新时间 2024-10-17 18:21:18

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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