In any county detached from one judicial district and added to another, if there be any case pending in the district court of such county which has at any time been tried by the judge of said court, and by him taken under advisement, and still undecided, it shall be the duty of the judge who tried said cause to make and render his finding and judgment therein and to determine all the motions therein, and to allow and settle the case made therein or dispose of such case in all respects as though said county had not been detached from his district. R.L. 1910, § 1781.
Oklahoma Legal Code