If any term of a circuit court is to end, or has ended, without the dispatch of all its business or if there be a failure to hold any term or it is expedient in the opinion of the judge of the court to hold a special term for the trial of any cause pending in such court or of issues made up in any cause by consent of parties, or if the situation of a person confined in jail for trial in such circuit court makes it proper that his case should be disposed of before the next regular term thereof, or necessity in the judge’s opinion requires it, the judge of such circuit court or, if he is dead or is unable from any cause to hold his court, the judge of any other circuit court who has been designated to hold such terms, may, by order entered in such court or by a warrant directed to the clerk, appoint a special term thereof and prescribe in such order or warrant whether any venire is to be summoned to attend the term. The clerk shall inform the attorney for the Commonwealth and the sheriff of such appointment, post a copy of the warrant or order at the front door of the courthouse and issue all proper process to such special term and the sheriff shall execute the process.