[GitHub] [carbondata] QiangCai commented on a change in pull request #3203: [DOC] Update doc for sort_columns modification

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QiangCai commented on a change in pull request #3203: [DOC] Update doc for sort_columns modification
URL: https://github.com/apache/carbondata/pull/3203#discussion_r283176470
 
 

 ##########
 File path: docs/ddl-of-carbondata.md
 ##########
 @@ -793,6 +793,19 @@ Users can specify which columns to include and exclude for local dictionary gene
        ALTER TABLE tablename UNSET TBLPROPERTIES('SORT_SCOPE')
        ```
 
+     - ##### SORT COLUMNS
+       Example to SET SORT COLUMNS:
+       ```
+       ALTER TABLE tablename SET TBLPROPERTIES('SORT_COLUMNS'='column1')
+       ```
+
+       UNSET is not supported, but it can set SORT_COLUMNS to empty string instead of using UNSET.
+       ```
+       ALTER TABLE tablename SET TBLPROPERTIES('SORT_COLUMNS'='')
+       ```
+
+       **NOTE:** streaming table is not supported for SORT_COLUMNS modification.
 
 Review comment:
   ok

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