SQL & PL/SQL

Hi

I have come across the following code in one of packages I have to work on:

        select max(rowid) into l_rowid

          from trade_xxxx

         where cob_date = v_cob_date

           and rownum <= 1;

The l_rowid variable is then used at a point later in the package to identify a partition, which is subsequently truncated, i.e.

          select subobject_name into l_partition_name
            from user_objects
           where data_object_id = dbms_rowid.rowid_object(l_rowid)
             and object_name = 'TRADE_XXXX'
             and object_type = 'TABLE PARTITION';

Assuming there is no row movement (which I accept is rather presumptuous), the question is, is a rowid a monotonically increasing value, something akin to sequence ?

My view is that it should not be used, but can anybody elaborate on the reasons ?

Thanks