hive sql 将array<float>转成arrray<string>

在网上找了很久，终于解决了，代码如下：

with mydata as (
  select
    ID,
    my_array
  from
    (
      --some array<struct> example
      select
        1 ID,
        array(1.1, 2.2, 3.3) as my_array
      union all
      select
        2 ID,
        array(4.4, 5.5, 6.6) as my_array
    ) s
)
select
  ID,
  concat_ws(',', collect_list(element)) as my_string --collect array of strings and concatenate it using ',' delimiter
from
  (
    select
      s.ID,
      cast(mystruct as string) as element --concatenate struct using : as a delimiter Or concatenate in some other way
    from
      mydata s lateral view explode(s.my_array) a as mystruct
  ) s
group by
  ID;

结果示意图：

id	my_string
2	4.4,5.5,6.6
1	1.1,2.2,3.3