flinksql 血缘
时间: 2023-08-16 08:06:22 浏览: 56
回答: 在Flink中,flinkStreamSQL血缘是指数据的来源和流向关系。通过flinkStreamSQL语句创建的源表会被映射为Flink Table类,并注册到TableEnvironment中。这样,当我们执行查询操作时,Flink会根据表之间的关系,构建数据的血缘关系图,以确定数据的来源和流向。具体而言,在flinkStreamSQL中,通过Kafka数据源创建的表会将Kafka的属性与Flink Table类的属性进行映射,并使用registerTable方法将该表注册到TableEnvironment中。同时,flinkStreamSQL还支持用户自定义函数(UDF)的注册,通过将实现了指定接口的类加载并注册到TableEnvironment中,实现对自定义函数的血缘关系的追踪。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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