liukun4515 commented on PR #3168:
URL: 
https://github.com/apache/arrow-datafusion/pull/3168#issuecomment-1222148563

   > Thanks @alamb @liukun4515 Imho its preferable to coerce in logical plan, 
and we probably have to avoid any kind of `downcast` before coercion. That 
looks like a beefy change. I'm happy to give a hand if needed
   
   Thank you @comphead , We discussed about the migration the coercion rule 
from physical phase to logical phase 
https://github.com/apache/arrow-datafusion/issues/3031 and other issue.
   
   But I need to take look at this issue and pr first, how and where to migrate 
the coercion is another thing.


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