函数，压缩和存储

1.1自定义函数

<dependencies>
        <!-- https://mvnrepository.com/artifact/org.apache.hive/hive-exec -->
        <dependency>
            <groupId>org.apache.hive</groupId>
            <artifactId>hive-exec</artifactId>
            <version>1.2.1</version>
        </dependency>
</dependencies>
代码参考

代码参考
add jar /opt/module/datas/udf.jar;
create temporary function mylower as “com.atguigu.hive.Lower”;
select ename, mylower(ename) lowername from emp;
2.1压缩