YannByron commented on issue #4131:
URL: https://github.com/apache/hudi/issues/4131#issuecomment-1012949764


   > In Hudi version 0.9.0,SQL insert determines by default that if there is a 
primary key, the operation is upsert. Starting from version 0.10.0, change to 
judge if PRECOMBINE_FIELD is set, operation is upsert
   
   @dongkelun 
   It will be nice that list all of the insert behaviors, insert, upsert, 
bulk-insert, insert-overwrite-table, insert-overwrite-partition, and how hudi 
choose which behavior through parameters and configurations.


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