如何从json列表中提取内容？

Question

有一个很长的string值，其中包含json列表：

{"name":"jack","age":"38","city":"JP"},{"name":"lee","age":"42","city":"tjs"},{"name":"smith","age":"46","city":"kh"}

目标是提取name的信息，因此结果为'jack,lee,smith'。

我尝试get_json_object，但它返回null;我还尝试使用get_json_object split，但仍未使用...

Hive中是否有可以实现此需求的合适功能？

Answer 1

with t as (select '{"name":"jack","age":"38","city":"JP"},{"name":"lee","age":"42","city":"tjs"},{"name":"smith","age":"46","city":"kh"}' as myjson)
select  get_json_object(concat('{"x":[',myjson,']}'),'$.x.name[*]')  as names
from    t

+------------------------+
|         names          |
+------------------------+
| ["jack","lee","smith"] |
+------------------------+

with t as (select '{"name":"jack","age":"38","city":"JP"},{"name":"lee","age":"42","city":"tjs"},{"name":"smith","age":"46","city":"kh"}' as myjson)
select  translate(get_json_object(concat('{"x":[',myjson,']}'),'$.x.name[*]'),'[]"','')  as names
from    t

+----------------+
|     names      |
+----------------+
| jack,lee,smith |
+----------------+