Reimus opened a new issue, #5915:
URL: https://github.com/apache/hudi/issues/5915

   In the documentation it says changing type from Date to String is supported 
(in the source/target table)
   
   Yet command using spark sql with sql extensions installed:
   
   ```
   ALTER TABLE `table` ALTER COLUMN ymd TYPE string;
   ```
   Produces output
   ```
   ALTER TABLE CHANGE COLUMN is not supported for changing column 'ymd' with 
type 'DateType' to 'ymd' with type 'StringType'
   ```
   
   **Expected behaviour**
   
   Either docs clearly state this is not supported - or it works as expected.
   
   **Environment Description**
   
   * Hudi version : 0.11
   
   * Spark version : 3.1.2
   
   * Hadoop version : 3.0.X
   
   * Storage (HDFS/S3/GCS..) : hdfs
   
   * Running on Docker? (yes/no) : no
   
   
   


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