通过使用配置单元查询可以将表数据转换为复杂类型列表 <structure> ？

Question

Here is the table details

Id    Data  
a     {"col1":"11.0","col2":30.0}  
a     {"col1":"12.0","col2":10.0}  
b     {"col1":"11.0","col2":20.0}  
b     {"col1":"12.0","col2":25.0}  
b     {"col1":"15.0","col2":25.0}  
c     {"col1":"12.0","col2":15.0}  
c     {"col1":"13.0","col2":16.0}  

Expected Output - List of Data structures grouped by Id.

ID  Data  
a   list[ {"col1":"11.0","col2":30.0},{"col1":"12.0","col2":10.0}]  
b   list[ {"col1":"11.0","col2":20.0},{"col1":"12.0","col2":25.0},{"col1":"15.0","col2":25.0}]  
c   list[ {"col1":"12.0","col2":15.0},{"col1":"13.0","col2":16.0}] 

Is it possible by functions supported by HIVE or need to write any user define function.

Answer 1

The short answer is yes, and there are previous answers to this, see here

How to get array/bag of elements from Hive group by operator?

But in summary if you you have only unique elements then use collect_set otherwise use collect_list (only works in hive 0.13+), apart from that it is a standard group by query.