ORS § 180.080
When directed by the Governor, the Attorney General shall attend in person, or by one of the assistants of the Attorney General, in any court, or appear before the grand jury in any county, for the purpose of managing and conducting in such court, or before such jury, the criminal action or proceeding specified in the requirement. The Attorney General, or the assistant of the Attorney General so attending, shall exercise all the powers and perform all the duties in respect of the action or proceeding which the district attorney would otherwise be authorized to exercise or perform. The district attorney shall only exercise such powers and perform such duties in the action or proceeding as are required of the district attorney by the Attorney General, or the assistant of the Attorney General so attending.
ORS 180.080