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...

问答 2024-07-31 来自：开发者社区

Flink sql cdc 增量聚合有文档吗？比如说基于CDC，算交易额的汇总

问答 2024-05-28 来自：开发者社区

Flink SQL使用mysql-cdc表，提示错误如下错误：我怎么样才能使用window聚合？

Flink SQL使用mysql-cdc表，做window操作，提示错误如下错误：org.apache.flink.table.api.TableException: StreamPhysicalWindowAggregate doesn't support consuming update and delete changes which is produced by node TableSo....

文章 2024-02-25 来自：开发者社区

Flink报错问题之Sql往kafka表写聚合数据报错如何解决

问题一：Flink操作 kafka ，hive遇到kerberos过期请问下 Flink操作 kafka ，hive遇到kerberos过期有什么解决方法吗？*来自志愿者整理的flink邮件归档参考答案：遇到kerberos过期问题，应该是你使用的是ticket cache，而不是keytab文件做认证*来自志愿者整理的flink邮件归档 ...

问答 2023-07-26 来自：开发者社区

Flink CDC中flink sql 聚合操作默认有状态吗？

Flink CDC中flink sql 聚合操作默认有状态吗？比如 select a, sum(b) from test group by a;这种，sum会使用历史计算的值吗，还是每条记录计算一个值，不管历史的。

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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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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