DataSource :: openObjectSpace - Open object space
The object space handle is opened for the object space defined in objectSpaceName . The database handle of the data source must have been opened before. If the object space handle is already opened it will be closed before ( closeObjectSpace() ).
When the object space name is empty, the root object space of the database is referred to as object space handle.
Return value: Object space reference ( odaba::ObjectSpace & )
The reference refers to an opened or not opened object space handle.