Flink CDC不带ID会报：please declare primary key for sink table when query contains update/delete record.我参考你之前的回答使用了其他字段做业务ID，但是业务上也不太行，现在就是想所有的数据都是insert，没有update和DELETE操作？

问答 2023-11-22 来自：开发者社区

请教一下Flink CDC，偶发性的delete记录没有写mysql的现象，这个是什么问题呀？

请教一下Flink CDC，我用upsert-kafka作为source 输入源。使用jdbc 作为sink，写入mysql，会出现偶发性的delete记录没有写mysql的现象，这个是什么问题呀？用的是FlinkCDC 2.2 + Flink-1.14.2任务刚提交的时候，delete动作会执行，但是过一段时间后，kafka里输入一个-D的记录，jdbc就不会写库里

问答 2023-11-07 来自：开发者社区

flink cdc delete主键删除源表一条记录，目标表未删除数据问题

flink cdc delete源表，目标表未删除，如下：INSERT INTO sink_table (id,device_id,name,device_type,device_name,gateway_serial_num,points_model_id,device_uniq_code,etl_time)SELECTt1.id,t1.device_id,t2.device_type,t2.....

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更新时间 2024-03-12 16:22:37

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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