duongcongtoai commented on issue #17445:
URL: https://github.com/apache/datafusion/issues/17445#issuecomment-3410520759

   i think so,  is only checking if the ptrs are equal between dictionary, this 
will be broken when:
   - spilling
   - repartition (if you set the original script to only use 1 partition the 
issue disappear)
   
   I found this issue relevant: 
https://github.com/apache/arrow-rs/pull/7519/files but maybe the implementation 
does not consider logically equivalent dictionary (different addr by the same 
dataset)


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