实时计算 Flink版join 的相关内容

问答 2023-01-09 来自：开发者社区

使用 interval join 合并a,b两个表，这两个表是flink cdc的表，b表的更新在a

使用 interval join 合并a,b两个表，这两个表是flink cdc的表，b表的更新在a表的上下界范围内，能够正常输出，一旦b表的更新在a表的上下界范围外，会发出一条delete消息，这个是正常的吗？我希望匹配不上不会有delete消息发出，这个可以怎么做呢？

问答 2023-01-09 来自：开发者社区

使用flink sql CDC 多表Interval Join 的时候，报错

使用flink sql CDC 多表Interval Join 的时候，报错：StreamPhysicalIntervalJoin doesn't support consuming update and delete changes which is produced by node TableSourceScan，有人知道怎么解决吗？

问答 2023-01-09 来自：开发者社区

有遇到过 flink SQL join 聚合结果缺失的情况吗？

问答 2023-01-09 来自：开发者社区

Flink CDC 请教个问题 pg 可不可以强制走 hash join 呢？

问答 2023-01-09 来自：开发者社区

flink1.13.6 版本使用flink sql interval left join 不生效

在使用flink interval join 时使用left join 关联两个表，并且输出到kafka中，发现输出的是撤回流，左表并不存数据在state中，一直输出不关联右表的数据，是版本太低不支持interval left join 吗

问答 2023-01-09 来自：开发者社区

flink-cdc中使用 select * from a left join b on a.id =

flink-cdc中使用 select * from a left join b on a.id = b.id 这种方式是不是就是Regular JOIN的方式，还是说cdc有啥特殊处理。状态设置ttl清理了，那之后关联表的时候不会有问题吗，比如A表中的某条记录在状态中...

文章 2022-11-26 来自：开发者社区

flink 维表join 的方式很多，本文主要讲述的是广播维表的方式进行join.实现方式：利用broadcast State将维度数据流广播到下游做join 将维度数据发送到kakfa作为广播原始流S1 定义状态描述符MapStateDescriptor 调用S1.broadcast()获得broadCastStream S2 调用非广播流S3.connect(S2),得到BroadcastC....

问答 2022-09-28 来自：开发者社区

flink sql 批处理的时候，用left join 产生了数据倾斜，一般怎么处理啊？

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更新时间 2024-11-29 17:31:01

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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