[GitHub] carbondata issue #3044: [CARBONDATA-3202]Documentation for alter table colum...

[SteNicholas]

Github user SteNicholas commented on the issue:

    https://github.com/apache/carbondata/pull/3044
  
    @akashrn5 Yeah,for example
    ````
    ALTER TABLE [db_name.]table_name CHANGE old_col_name new_col_name 
column_data_type comment ' '
    ````
    Spark 2.1 couldn't support column coment after column rename.
    [[BACKPORT] [SPARK-23525] [SQL] Support ALTER TABLE CHANGE COLUMN COMMENT 
for external hive 
table](https://github.com/apache/spark/pull/20768?from=singlemessage&isappinstalled=0)


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