实时计算 Flink版sql group 的相关内容

文章 2024-08-22 来自：开发者社区

Flink SQL 在快手实践问题之Group Window Aggregate 中的数据倾斜问题如何解决

问题一：数据倾斜在实时计算中可能带来哪些问题？数据倾斜在实时计算中可能带来哪些问题？参考回答：数据倾斜在实时计算中可能带来指标延迟或数据事故等问题。当实时计算任务遇到数据倾斜时，部分节点可能会处理过多的数据，导致处理速度下降，进而影响整个任务的完成时间和数据准确性。关于本问题的更多问答可点击原文查看： https://...

问答 2024-07-23 来自：开发者社区

Flink SQL 如何解决 Group Window Aggregate 中的数据倾斜问题？

阿里云文档 2024-07-16

GroupAggregate变更兼容性

本文为您介绍Group Aggregate变更的可兼容性和不可兼容性详情。

阿里云文档 2024-07-11

GroupWindowAggregate变更兼容性

本文为您介绍Group Window Aggregate变更的可兼容性和不可兼容性详情。

问答 2022-12-09 来自：开发者社区

大家flink sql 选择 group-offset 新的group 会报错吗？

问答 2022-07-11 来自：开发者社区

请问在flink sql-client中进行做group by 聚合值统计的时候，流式查询时是怎么计

请问在flink sql-client中进行做group by 聚合值统计的时候，流式查询时是怎么计算的？是每次都把所有历史明细数据聚合一次吗？

问答 2022-02-15 来自：开发者社区

flink1.10.1/1.11.1 使用sql 进行group 和时间窗口操作后状态越来越大

Hi，社区的各位大家好：我目前生产上面使用的是1.8.2版本，相对稳定为了能够用sql统一所有相关的作业，同时我也一直在跟着flink最新版本进行研究，截止目前先后研究了1.10.1 1.11.1共2个大版本在尝试使用的过程中，我发现了通过程序，使用sql进行group操作时，checkpoint中的数据量一直在缓慢增加状态后端使用的是rocksdb 的增量模式 StateBacke.....

问答 2021-12-08 来自：开发者社区

Flink SQL GROUP BY后写入postgresql数据库主键如何实现业务场景需求呢？

SQL中对时间窗口和PRODUCT_ID进行了Group By聚合操作，PG数据表中的主键须设置为WINDOW_START /WINDOW_END和PRODUCT_ID，否则无法以upinsert方式写出数据，但是这样却无法满足业务场景的需求，业务上应以RANK_ID +WINDOW_START /WINDOW_END为主键标识，请问Flink 中该如何实现这个需求？*来自志愿...

问答 2021-12-02 来自：开发者社区

Flink SQL将group聚合的数据写入到HBase表报primary keys问题

各位好，最近在研究Flink Hbase连接器，测试实验是将聚合的数据写入到hbase报错。希望能得到各位的帮助。代码如下： /** @Author: ellis.guan @Description: HBase测试类 @Date: 2020/3/6 15:41 @Version: 1.0 */ p...

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更新时间 2024-08-23 12:59:00

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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

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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