export type RankFnName = 'ts_rank' | 'ts_rank_cd'

/** Choose Postgres rank function — cover-density variant (`ts_rank_cd`) or plain (`ts_rank`). */
export function chooseRankFn(coverDensity: boolean): RankFnName {
  return coverDensity ? 'ts_rank_cd' : 'ts_rank'
}