大家好，请教一个问题，流表和维表在JOIN时，如果流表的数据没在维表中时，能否进行延迟join，比如，每10分钟进行match一下，连续match6次都没有match上的话，丢弃该数据。这个场景怎么通过flink SQL或UDF实现，目前是通过timer来实现的，感觉有些麻烦。 *来自志愿者整理的flink邮件归档

问答 2021-12-02 来自：开发者社区

为什么Flink 维表延迟join？

我么生产环境同样遇到这种问题，因为上有流数据到了，但是维表数据未更新导致丢失部分数据，请问大家现在有好的解决方案去解决Flink SQL 维表延迟Join的问题了吗？有解决方案的小伙伴能分享下嘛？*来自志愿者整理的flink邮件归档

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更新时间 2023-04-26 09:11:44

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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