wgtmac opened a new pull request, #45127:
URL: https://github.com/apache/arrow/pull/45127

   ### Rationale for this change
   
   FormatStatValue function in the parquet/types.cc employs reinterpret_cast to 
cast bytes to specific data types. It is undefined behavior when the bytes are 
unaligned.
   
   ### What changes are included in this PR?
   
   Use std::memcpy to replace reinterpret_cast.
   
   ### Are these changes tested?
   
   Pass CI.
   
   ### Are there any user-facing changes?
   
   No.


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