kou commented on issue #45560:
URL: https://github.com/apache/arrow/issues/45560#issuecomment-2667867943

   > let imagine a type like ` auto type = struct_({field("list_a", 
fixed_size_list(int64(), 2)), field("list_b", fixed_size_list(int64(), 2))});` 
I think even if there is a max element for the struct(not child type) it would 
probably be a two fixed_size_list again. Thus it could not be a scalar
   
   We have `StructScalar` and `FixedSizeListScalar:
   
https://github.com/apache/arrow/blob/c7a91000a454303bcf860c629fa6a4d041a8fbad/cpp/src/arrow/scalar.h#L714-L727
   
https://github.com/apache/arrow/blob/c7a91000a454303bcf860c629fa6a4d041a8fbad/cpp/src/arrow/scalar.h#L705-L712
   
   It seems that they can represet the max value.


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