(a) No judge of any court shall either directly or indirectly express in open court his approval or disapproval of the verdict of any jury in any case tried before him, except as provided in this Code section; nor may the judge discharge any jury upon the ground that the verdict rendered in any case does not meet with his approval.

(b) No judge of any court may commend or compliment a jury during the term of any court for discharging its duty if the commendation or compliment has the effect of approving a verdict.

(c) If any judge of any court either directly or indirectly expresses in open court his approval or disapproval of the verdict of the jury in any case tried before him, he shall be disqualified from presiding in the case in the event a new trial is granted.

(d) Nothing in this Code section shall have the effect of prohibiting a judge of any court from approving or disapproving the verdict of a jury in any case tried before him in hearing a motion for a new trial that comes on before him; however, the approval or disapproval on the hearing of a motion for new trial shall be expressed in the formal order of the judge in granting or overruling the motion and not otherwise.