reuvenlax commented on issue #25228:
URL: https://github.com/apache/beam/issues/25228#issuecomment-1420116876

   This is an interesting request. Even in the above example, not all INT64 
values can be converted to Java double. e.g. the following code:
   
   long longValue = XXXX;
   double doubleValue = (double) longValue;
   assert(longValue == (long) doubleValue);
   
   will often fail, especially for large numbers (e.g. try it out for 
499999999000000001L).
   
   I guess we could convert optimistically and fail if the specific number 
happens to lose precision, however I'm uncomfortable with that. That's a recipe 
for a pipeline that works for a while and then suddenly starts behaving poorly 
as the input data changes, which is very confusing. I think understandable and 
easily-predictable behavior is better.
   
   


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