，flink cdc读取mysql表的时候，有一个字段是有默认值的，但是将这个字段设为null的时候，cdc的after里面只是读到它的默认值，读不到null，有办法解决吗？我意思是binlog输出的after和before里面都是默认值，after里面读不到null，这条数据来的时候，我也不知道它是不是null呀？我用的JsonDebeziumDeserializationSchema序列化，....

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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