实时计算 Flink版join 的相关内容

返回频道实时计算 Flink版join

问答 2023-08-02 来自：开发者社区

Flink CDC中我的业务不太适合使用lookup join,同步的可以理解为，用户信息表，部门？

Flink CDC中我的业务不太适合使用lookup join,同步的可以理解为，用户信息表，部门表，权限表、角色表，jion后给整理成一个大宽表。这个有啥好的办法吗？

问答 2023-08-01 来自：开发者社区

请问大佬Flink CDC双流join能同步删除吗？我是直接flink mysql cdc ->

请问大佬Flink CDC双流join能同步删除吗？我是直接flink mysql cdc -> reguler join -> mysql jdbc，表都有主键？

问答 2023-08-01 来自：开发者社区

flink sql 双流regular join关联后结果输出到mysql，不能同步删除，有大佬？

flink sql 双流regular join关联后结果输出到mysql，不能同步删除，有大佬知道解决方案吗？

问答 2023-08-01 来自：开发者社区

Flink CDC做join和聚合会对源数据库照成压力吗？look up 和 join 啥区别？

问答 2023-07-26 来自：开发者社区

flink sql任务有三个mysql cdc 源表通过left join关联写入目标表，没更新？

flink sql任务有三个mysql cdc 源表通过left join关联写入目标表。过了半天之后，更新源表中的记录，发现目标表没更新。这是flink SQL不支持吗，还是要做什么特殊设置，或者使用什么语法？就是更新了where条件对应的记录，另外，大表join，是如何做实时记录匹配的，应该是需要流内存拦截吧，不然怎么做到实时匹配呢？假如关联的两张表的记录一个在最开始就来了，另一个迟了很久才....

问答 2023-07-26 来自：开发者社区

请问flink mysql cdc 双流left join后再入库在目标表c没有删除呢？

"请问flink mysql cdc 双流left join后再入库mysql，insert into c select from a left join b，源表a某些数据删了，在目标表c没有删除呢？三个表都设置了主键。请问怎么解决？测试删除trans_detail的数据，在结果表里没有被删除，没有left join的话，能同步删除。INSERT INTO tr_flow_base_info_....

问答 2023-07-26 来自：开发者社区

Flink CDC中，如果要join多张维表，for system-time as of要写多次？

Flink CDC中，如果要join多张维表，那个for system-time as of也是要写多次？

问答 2023-07-26 来自：开发者社区

Flink CDC中维表join时候，两个表join的字段类型不一致这个有解决方案吗?

问题1：Flink CDC中维表join时候，两个表join的字段类型不一致这个有解决方案吗，改数据库字段类型肯定不行，已经是生产库了；org.apache.flink.table.api.TableException: implicit type conversion between VARCHAR(2147483647) and INTEGER is not supported on jo....

问答 2023-07-26 来自：开发者社区

Flink CDC直接查数据库，是相当于普通的join了吗？

问答 2023-07-26 来自：开发者社区

Flink CDC中多表join的原理是什么？

Flink CDC中多表join的原理是什么？是否是把所有的数据发送到flink内存之后在内存里做的关联？看了一下四张表总共22.09G，那就是需要内存比这还大的服务器才能做到全量同步？

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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