Hive 如何在配置单元表中拆分字符串

我有一个表

emp

，它看起来像这样：

+----------+----+
|customerID|name|
+----------+----+
|         1| Ram|
|         2| Raj|
+----------+----+

我希望分割每条记录的字符串，并希望在配置单元中输出如下所示：

+----------+----+---+
|customerID|name|req|
+----------+----+---+
|         1| Ram|  R|
|         1| Ram|  a|
|         1| Ram|  m|
|         1| Ram|   |
|         2| Raj|  R|
|         2| Raj|  a|
|         2| Raj|  j|
|         2| Raj|   |
+----------+----+---+

---

您必须在配置单元中将名称列转换为数组类型，然后分解以获得所需的结果。 例如：

移除空白空间。

select customerID,req  from (select *,explode(split(name,'')) as req from emp) where req != ''

+----------+---+
|customerID|req|
+----------+---+
|         1|  R|
|         1|  a|
|         1|  m|
|         2|  R|
|         2|  a|
|         2|  j|
+----------+---+

select customerID,req  from (select *,explode(split(name,'')) as req from emp) where req != ''

+----------+---+
|customerID|req|
+----------+---+
|         1|  R|
|         1|  a|
|         1|  m|
|         2|  R|
|         2|  a|
|         2|  j|
+----------+---+