Hive基础之Hive的复杂类型

Array

一组有序字段，字段的类型必须相同。Array(1,2)

create table hive_array(ip string, uid array<string>)
row format delimited
fields terminated by ‘,‘
collection items terminated by ‘|‘
stored as textfile;

load data local inpath "/home/spark/software/data/hive_array.txt" overwrite into table hive_array;

hive_array.txt

192.168.1.1,www.baidu.com|www.google.com|www.qq.com
192.168.1.2,www.baidu.com|www.sina.com|www.sohu.com
192.168.1.3,www.qq.com|www.163.com|www.youku.com

select * from hive_array;
192.168.1.1     ["www.baidu.com","www.google.com","www.qq.com"]
192.168.1.2     ["www.baidu.com","www.sina.com","www.sohu.com"]
192.168.1.3     ["www.qq.com","www.163.com","www.youku.com"]

使用下标访问，下标从0开始：

select ip, uid[0] as id from hive_array;
192.168.1.1     www.baidu.com
192.168.1.2     www.baidu.com
192.168.1.3     www.qq.com

查看数据长度：

select size(uid) from hive_array;
3
3
3

数组查找：

select * from hive_array where array_contains(uid, "www.baidu.com");
192.168.1.1     ["www.baidu.com","www.google.com","www.qq.com"]
192.168.1.2     ["www.baidu.com","www.sina.com","www.sohu.com"]

Struts

Map

Hive基础之Hive的复杂类型