实时计算 Flink版join 的相关内容

问答 2023-07-26 来自：开发者社区

Flink CDC中四张表做leftjoin关联然后sink。flinkCDC是怎么做join？

Flink CDC中四张表做leftjoin关联，然后sink到一张表。flinkCDC是怎么做join的？是把所有数据发送到flink内存里，在内存里做的关联？造了一千万数据，MySQL显示有两张表的数据已经全部发送了。

问答 2023-07-26 来自：开发者社区

Flink CDC中关于维表join这种情况下flinksql咋写呢？

Flink CDC中关于维表join，假如我的动态表是A，我要补充的数据在表C，但是两者需要通过表B才能关联起来，这种情况下flinksql咋写呢？lookup join。动态表A，要取的补充字段在表C，表A和表C需要表B才能关联上，这种属于多流join?

问答 2023-07-26 来自：开发者社区

Flink CDC中请问如果lookup join 提示超时，锁问题，一般如何优化？

Flink CDC中请问如果lookup join 提示超时，锁问题，一般如何优化？调整参数？lookup.cache.max-rowslookup.cache.ttl

问答 2023-07-26 来自：开发者社区

大佬们，我想请问下，Flink中我是用flinksql进行批处理操作，在left join的时候会？

大佬们，我想请问下，Flink中我是用flinksql进行批处理操作，在left join的时候会产生回撤流，这是不是flink批处理不是特别友好呀？我这边也是使用的execution.runtime-mode=BATCH,但是还是会产生回撤流

问答 2023-07-25 来自：开发者社区

Flink中FLINK-SQL，两个千万级的表join，并行度12，tm=4096m，慢得扣卡，？

Flink中FLINK-SQL，两个千万级的表join，并行度12，tm=4096m，慢得扣卡，有没大佬知道哪个环节出了问题？

问答 2023-07-20 来自：开发者社区

select table_A.user_id ,max(table_B.end_time) as last_timefrom table_Aleft join table_B FOR SYSTEM_TIME as of table_A.process_time as table_Bon table_A.user_id=table_B.user_idand table_B.status='0'...

问答 2023-07-18 来自：开发者社区

大佬们，Flink中双流join，要全量join，状态无限增长，这种有什么好的解决方案么？？cdc打

大佬们，Flink中双流join，要全量join，状态无限增长，这种有什么好的解决方案么？？cdc打宽表a是啥意思呀这个方案没看懂，不能维表join，数据不能过期不能设置ttl

问答 2023-07-13 来自：开发者社区

Flink CDC中flink interval join 默认效果是inner join吗，支不？

Flink CDC中flink interval join 默认效果是inner join吗，支不支持left join效果

问答 2023-07-13 来自：开发者社区

looup join时，Flink维表发生变化，会重新下发join后的数据嘛？还是说只有主流来了，才

looup join时，Flink维表发生变化，会重新下发join后的数据嘛？还是说只有主流来了，才会触发join

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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