he object.
All changes are done with the object copy, leaving original object unchanged.
DyBASE marks in special bitmap page of the object index, which contains
modified object handle.<P>

When transaction is committed, DyBASE first checks if size of object index
was increased during current transaction. If so, it also reallocates shadow
copy of object index. Then DyBASE frees memory for all "old objects",
i.e. objects which was cloned within transaction. Memory can not be
deallocated before commit, because