On Mon, Mar 8, 2010 at 11:07 AM, Erik Holstad <erikhols...@gmail.com> wrote: > Why is it that null column values are not allowed?
It's semantically unnecessary and potentially harmful at an implementation level. (Many java Map implementations can't distinguish between a null key and a key that is not present.) > What is the reason for using a ConcurrentSkipListMap<byte, IColumn> for > columns_ in ColumnFamily > compared to using the set version and use the comparator to sort on the name > field in IColumn? ? > For the call get_range_slice() you get all the rows returned even though > they might have been deleted, Yes, that is the point. > is it really that expensive to check if the list is empty before returning > that row Yes, because you have to check the entire row, which may be much larger than the given predicate. -Jonathan