Ohio Code § 2937.09

§ 2937.09.

If the charge is a felony, the court or magistrate shall, before receiving a plea

of guilty, advise the accused that such plea constitutes an admission which may be

used against him at a later trial.  If the defendant enters a written plea of guilty or, pleading not guilty, affirmatively

waives the right to have the court or magistrate take evidence concerning the offense,

the court or magistrate forthwith and without taking evidence may find that the crime

has been committed and that there is probable and reasonable cause to hold the defendant

for trial pursuant to indictment by the grand jury, and, if the offense is bailable,

require the accused to enter into recognizance in such amount as it determines to

appear before the court of common pleas pursuant to indictment, otherwise to be confined

until the grand jury has considered and reported the matter.