Okla. Stat. tit. 12, § 12-953: Final order defined

An order affecting a substantial right in an action, when such

order, in effect, determines the action and prevents a judgment, and

an order affecting a substantial right, made in a special proceeding

or upon a summary application in an action after judgment, is a

final order, which may be vacated, modified or reversed, as provided

in this article.