thesumery commented on PR #4882:
URL: https://github.com/apache/inlong/pull/4882#issuecomment-1175715305

   There are some reasons that clickhouse sink didn't release the ability of 
update/delete:
   1. clickhouse `update` operations is heavy, it will takes precedence over 
all others operation to execute, so it has a poor performance. It is more 
suitable for batch scenes but not streaming scenes where operations are 
performed frequently.
   


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