chl-wxp commented on PR #10897:
URL: https://github.com/apache/seatunnel/pull/10897#issuecomment-4474867833

   > @chl-wxp Hello, may I ask why this parameter is being cleared? It seems to 
be an entry that only wants to `insert` and not `update`?
   
   Thank you for your review. When I reviewed the code, I found that the final 
behavior controlled by the parameter support_upsert_by_insert_only is to insert 
data using insert syntax. When we want to achieve this goal, we only need to 
set the parameter enable_upsert to false. Another very important point is that 
there is no introduction to the support_upsert_by_insert_only parameter in 
earlier versions.


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