Jibing-Li commented on PR #9593:
URL: https://github.com/apache/incubator-doris/pull/9593#issuecomment-1129804041

   > > > How many steps are you planning to implement this in? I don't see the 
sync logic after schema change.
   > > 
   > > 
   > > This is the only PR to implement this. We don't need to sync the changed 
schema, it is read the schema from HMS every time. So it is automatically 
synced.
   > 
   > It only sync once when creating the table. When the table schema is 
changed in Hive for a existed table in Doris, the schema in Doris also need to 
be updated. How to handle this case? Drop and recreate the table in Doris?
   
   In the code, we don't keep the schema in Catalog, the schema is fetched from 
HMS every time when getBaseSchema is called, so it is always consistent with 
the Hive schema. getBaseSchema is called when user execute describe or query 
statement. It was tested and the behavior looks correct.


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