[FIX] orm.copy_data: avoid reading useless and possibly expensive data when copying records
  
Rather than reading the data and discarding it,
it is much faster to not read it in the first place.
[FIX] orm.copy_data: avoid reading useless and possibly expensive data when copying records
  
Rather than reading the data and discarding it,
it is much faster to not read it in the first place.