Jackie-Jiang commented on issue #4608: Unit tests and bug fixes for DeleteTable 
rest API for controller.
URL: https://github.com/apache/incubator-pinot/pull/4608#issuecomment-535111188
 
 
   > > The reason why we do not check if table exists is because when the 
previous table delete failed in the middle, the ideal state might already be 
removed. We still want to clean up the other properties for the table.
   > 
   > Thanks for pointing this out. Is it a common case? We could solve this 
issue in a periodically validation cleaner task?
   
   That is not the common case, but in exception path. Yes, that can be 
achieved by a periodically validation, but automatically delete table 
properties could also be risky. Right now we still rely on manually call the 
delete table again to clean up all properties.
   Any reason why you want to check the table existence first?

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