http://apache-carbondata-dev-mailing-list-archive.168.s1.nabble.com/jira-Updated-CARBONDATA-4179-Support-renaming-of-complex-columns-tp108256.html
Summary: Support renaming of complex columns (was: Support rename/change datatype for complex columns)
> Support renaming of complex columns
> -----------------------------------
>
> Key: CARBONDATA-4179
> URL:
https://issues.apache.org/jira/browse/CARBONDATA-4179> Project: CarbonData
> Issue Type: Sub-task
> Reporter: Akshay
> Priority: Major
>
> Complex columns supported for - *array and struct.*
> For schema lets say- *str struct<a:int>* the following points will be considered -
> 1) Rename parent name *str to str2*
> alter table test_rename change str str2 struct<a:int>
>
> 2) Rename child name from *a to b*
> alter table test_rename change str str struct<b:int>
>
> 3) Change datatype of *a* from *int to long*
> alter table test_rename change str str struct<a:long>
>
> *NOTE*- Renaming and changing datatype both operations should be done without changing the levels of the complex column. For example :
> 1) int cannot be converted to an array or struct.
> 2) array cannot be converted to struct and vice-versa