demo/demo_caml_mysql.ml

   1
   2 open Printf
   3 module M = Mysql
   4
   5 module G = Demo_caml_gen_mysql.Sqlgg(Sqlgg_mysql.Make(Int64))
   6
   7 let main () =
   8   let db = M.quick_connect ~database:"test" ~user:"root" () in
   9
  10   G.drop_person db;
  11   G.drop_money db;
  12
  13   (* create tables *)
  14   G.create_person db;
  15   G.create_money db;
  16
  17   (* add all person records *)
  18   G.add_person db "John" "Black";
  19   let john = M.insert_id db in
  20   G.add_person db "Ivan" "Petrov";
  21   let ivan = M.insert_id db in
  22   G.add_person db "Sancho" "Alvares";
  23   let sancho = M.insert_id db in
  24
  25   (* add money relations *)
  26   G.add_money db john ivan 200L;
  27   G.add_money db ~src:john ~dst:sancho ~amount:100L;
  28   G.add_money db ~amount:250L ~dst:sancho ~src:john;
  29   G.add_money db sancho ivan 300L;
  30
  31   (* summarize by person and output *)
  32   print_endline "Total transfers:";
  33   G.calc_total db (printf "%s = %Lu\n");
  34
  35   (* list donors *)
  36   print_endline "Donors:";
  37   G.list_donors db "petrov" 100L print_endline;
  38
  39   (* properly close database *)
  40   M.disconnect db;
  41
  42   ()
  43
  44 let () = Printexc.print main ()
  45