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Applies the changes made to a data graph back to the database.
void SDO_DAS_Relational::applyChanges ( PDO $database_handle , SDODataObject $root_data_object )
Given a PDO database handle and the special root object of a data graph, examine the change summary in the datagraph and applies the changes to the database. The changes that it can apply can be creations of data objects, deletes of data objects, and modifica