实时计算 Flink版sql state 的相关内容

阿里云文档 2025-02-25

Flink SQL Join快速入门

Flink SQL支持在动态表上进行复杂的连接操作，提供多种查询语义和join类型。使用时需避免引发笛卡尔积，因为Flink SQL不支持这种操作，会导致查询失败。默认情况下，join顺序未优化。为提高性能，可在FROM子句中调整表顺序，将更新频率最低的表放在前面，最高的放在后面。

阿里云文档 2025-02-25

阿里云Flink SQL如何基于SPL实现弱结构化分析

本文介绍Flink SQL基于SPL实现弱结构化分析的操作步骤。

阿里云文档 2025-02-24

阿里云Flink SQL如何基于SPL实现行过滤与列裁剪

本文介绍Flink SQL用SPL完成行过滤与列裁剪的操作步骤。

阿里云文档 2025-02-06

DataWorks新版数据开发中的Flink SQL Streaming节点支持使用标准SQL语句定义实时任务处理逻辑。Flink SQL Streaming具有易用性、丰富的SQL支持、强大的状态管理及容错能力，兼容事件时间和处理时间，并可灵活扩展。该节点易于与Kafka、HDFS等系统集成，提供详尽的日志和性能监控工具。您只需在DataWorks项目中添加Flink SQL Streaming...

阿里云文档 2025-01-21

Flink Hive SQL作业快速入门

实时计算Flink版支持使用Hive方言创建批处理作业，通过兼容Hive SQL语法增强与Hive互操作性，便于从现有Hive作业平滑迁移至实时计算管理控制台。

文章 2024-08-22 来自：开发者社区

Flink SQL 在快手实践问题之由于meta信息变化导致的state向前兼容问题如何解决

问题一：为什么指标标识和 state 类型的映射关系很重要？为什么指标标识和 state 类型的映射关系很重要？参考回答：因为有的聚合函数（如avg）可能需要多个state（如sum和count）来辅助计算，所以指标标识和state类型的映射关系对于判断state是否兼容至关重要。这种映射关系被保存在state的meta中以便进行兼容性判断。 ...

问答 2024-07-23 来自：开发者社区

为什么 Flink SQL 在判断 state 是否兼容时存在漏洞？

问答 2023-08-21 来自：开发者社区

这是啥原因？ flink sql 使用自定义函数时出现 The state is cleared

这是啥原因？ flink sql 使用自定义函数时出现 The state is cleared because of state ttl，source用的hive,sink用的mysql

问答 2023-08-09 来自：开发者社区

Flink CDC中怎么在sql里面配置join state状态存储，还是默认特性不需要配置？

问答 2023-03-08 来自：开发者社区

请问flink sql 的windows操作，state会自动清理吗？

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更新时间 2024-08-23 12:59:11

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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。

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MySQL 到 Hologres

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