let c = pgc () in
(*let r1 = helm_class_id "MathResource" in*)
(*let qq = "select att0 from t" ^ r1 ^ " where att0 " ^ (pattern_match apreamble apattern afragid) ^ " order by t" ^ r1 ^ ".att0 asc" in*)
let c = pgc () in
(*let r1 = helm_class_id "MathResource" in*)
(*let qq = "select att0 from t" ^ r1 ^ " where att0 " ^ (pattern_match apreamble apattern afragid) ^ " order by t" ^ r1 ^ ".att0 asc" in*)