alamb commented on issue #3922:
URL: 
https://github.com/apache/arrow-datafusion/issues/3922#issuecomment-1287360445

   The root cause is that the arrow cast kernel doesn't support converting from 
timestamp --> int32 (as @waitingkuo  mentions)
   
   To fix this we çould extend the support support in 
https://github.com/apache/arrow-rs/blob/c7f7606/arrow/src/compute/kernels/cast.rs#L253-L254


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