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51CTO
26 天
Flink SQL 四种 Join 方式详解:原理、场景与实战-51CTO.COM
二、Regular Join:常规双流 Join 1. 定义与核心思想 Regular Join 是 Flink SQL 中最基础的 Join 类型,语法与标准 SQL 一致(如 INNER JOIN、LEFT JOIN)。 它持续关联两条流的数据:当任一流收到新数据时,会扫描另一条流的所有历史数据,生成匹配结果并更新下游。 核心特点: ...
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