Okla. Stat. tit. 22, § 22-330: Discharge of grand jury

On the completion of the business before the grand jury, or

completion of the statutory time limit for sessions of a grand jury,

or whenever the court shall be of the opinion that the public

interests will not be subserved by further continuance of the

session, the grand jury must be discharged, but whether the business

be completed or not they are discharged by the final adjournment of

the court, or by the judge of the district holding court in some

other county of the state, not within the judicial district in which

the grand jury is called.