hadoop函数-阿里云

　Hive可以通过实现用户定义函数（User-Defined Functions，UDF）进行扩展（事实上，大多数Hive功能都是通过扩展UDF实现的）。想要开发UDF程序，需要继承org.apache.hadoop.ql.exec.UDF类，并重载evaluate方法。Hive API提供@Des...

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更新时间 2023-04-20 10:17:55

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