code: protected function getDefaultParts()
  	{
  		if (!isset(CmdUpsert::$DEFAULT))
  		{
  			CmdUpsert::$DEFAULT		= parent::getDefaultParts();
  			CmdUpsert::$PART_SET	= count(CmdUpsert::$DEFAULT);
  			
  			CmdUpsert::$DEFAULT[CmdUpsert::$PART_SET] = false;
  		}
  		
  		return CmdUpsert::$DEFAULT;
  	}
docs: Get the parts this query can have.
  @return array Array containing only the part as keys and values set to false.