实时计算 Flink版lookup join维表的相关内容

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 2024-11-22

Processing Time Temporal Join语句

对于每条流式数据，可以关联一个外部维表数据源，为实时计算Flink版提供数据关联查询。

阿里云文档 2024-10-21

维表JOIN语句

对于每条流式数据，可以关联一个外部维表数据源，为实时计算Flink版提供数据关联查询。

阿里云文档 2024-07-31

Join变更兼容性

本文为您介绍Regular Join、Interval Join、Temporal Join和Lookup Join变更的状态兼容性的详情。

文章 2024-06-15 来自：开发者社区

实时计算 Flink版产品使用问题之lookup Join hologres的维表，是否可以指定查bitmap

问题一：FLINK CEP社区后续有演进计划吗？近期计划引入FLINK CEP，浏览官网发现CEP已经两年多没有演进了，FLIP-200、FLIP-228、FLIP-244也没有了后续讨论，想咨询FLINK CEP后续是否还会持续演进，有没有具体的演进计划。参考答案：在开源项目中，组件的演进往往取决于社区活跃度以及项目维护者和贡献者的投入。虽然某...

阿里云文档 2024-05-30

如何使用双流JOIN语句,有哪些语法和示例

Flink SQL支持对动态表进行复杂而灵活的连接操作，本文为您介绍如何使用双流JOIN语句。

问答 2024-03-20 来自：开发者社区

flink中lookup Join hologres的维表，可以指定查bitmap吗？

flink中lookup Join hologres的维表，可以指定查bitmap吗？如果查询条件同时走clustering key和bitmap时，发现bitmap的速度更快

问答 2023-01-30 来自：开发者社区

有用过flink streaming去lookup join一个一亿条数据的hive维表的经验的吗？

有没有哪位有用过flink streaming 去lookup join一个一亿条数据的hive维表的经验。左边kafka，每分钟500万条，两侧字段球不到30，hive数据同步到kv里再去join，join的时候再加些缓存

问答 2023-01-08 来自：开发者社区

请问flink-cdc定义的表可以直接做为 lookup join 的维表吗？

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更新时间 2024-06-21 19:38:07

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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