(a) Except as otherwise provided by law, a district attorney or criminal district attorney is entitled to receive from the state:
(1) annual compensation in an amount equal to at least 80 percent of the state annual salary as set by the General Appropriations Act in accordance with § 659.012 paid to a district judge with comparable years of service as the district attorney or criminal district attorney; and
(2) a monthly amount of longevity pay based on the district attorney’s or criminal district attorney’s years of service that would be paid to the district attorney or criminal district attorney under § 659.0445 if the district attorney or criminal district attorney were a judge or justice described by § 659.0445(a).
(b) For purposes of this section, the years of service of a district attorney or criminal district attorney include any years of service as:
(1) a district attorney, criminal district attorney, or county attorney; or
(2) an appellate court justice, district judge, judge of a statutory county court, judge of a multicounty statutory county court, or judge or justice of a statutory probate court.