It is the duty of the court to advance upon the docket causes the decision of which directly involves questions concerning the public revenues, whether of state, county or municipality, questions concerning the boundaries of counties, towns or cities, or concerning public officers as to their eligibility, qualifications or appointment, or their lawful functions, so that such cause may be heard and determined with the least delay consistent with the proper investigation of such causes upon their merits.
T.C.A. § 20-8-105