sql - 使用 hql 将列从列表转换为数组，以及将数组转换为 hive 中的列表

Question

我想使用 hql 将以下列从列表转换为数组

<表类=“s-表”> <标题> 列表 数组 <正文> [10:20] [10,20] [30:40:50] [30,40,50]

我还想将它从数组转换为列表

<表类=“s-表”> <标题> 数组 列表 <正文> [10,20] [10:20] [30,40,50] [30:40:50]

Answer 1

数组列出演示:

with mytable as (
select stack (2,
array(10,20),
array(30,40,50)
) as myarray
)

select myarray, concat('[',concat_ws(':',collect_list(string(element))),']') as list
  from mytable
       lateral view explode(myarray) e as element
       group by myarray;

结果:

myarray     list
[10,20]     [10:20]
[30,40,50]  [30:40:50]

列表到数组演示:

with mytable as (
select stack (2,
'[10:20]',
'[30:40:50]'
) as list
)

select list, collect_list(int(element)) myarray
  from mytable
       lateral view explode (split(regexp_replace(list,'\\[|\\]',''),':')) e as element
  group by list;

结果:

list        myarray
[30:40:50]  [30,40,50]
[10:20]     [10,20]

如果您同意array<string> ，那么转换就简单多了:

with mytable as (
select stack (2,
'[10:20]',
'[30:40:50]'
) as list
)

select list, split(regexp_replace(list,'\\[|\\]',''),':') myarray
  from mytable;

结果:

list        myarray
[10:20]     ["10","20"]
[30:40:50]  ["30","40","50"]