如何在Hive中将字符串转换为数组？

Question

我正在使用Hive 1.1

 hive> select country from releases limit 1;
 OK
 ["us","ca","fr"]

目前，在Hive中，国家是字符串类型。如何将其转换为Array [String]？

我尝试了以下操作，但出现错误：

 hive> select country, cast(country as Array[String]) from releases limit 1;
 FAILED: ParseException line 1:48 cannot recognize input near 'Array' '[' 'String' in primitive type specification

有人可以帮我进行类型转换吗？

- Surender Raja

Answer 1

hive> with releases as (select '["us","ca","fr"]' as country)
    > select  split(regexp_extract(country,'^\\["(.*)\\"]$',1),'","')
    > from    releases
    > ;
OK
_c0
["us","ca","fr"]

- David דודו Markovitz

Answer 2

没有使用regexp_extract的方法

SELECT country, split(substr(country, 3, length(country) - 4),'","') AS arr FROM releases LIMIT 1;

- user10223493