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diff --git a/components/hmysql/hMysql.ml b/components/hmysql/hMysql.ml
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+(* Copyright (C) 2005, HELM Team.
+ * 
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ * 
+ * HELM is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 
+ * HELM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA  02111-1307, USA.
+ * 
+ * For details, see the HELM World-Wide-Web page,
+ * http://cs.unibo.it/helm/.
+ *)
+
+(* $Id$ *)
+
+type dbd = Mysql.dbd option 
+type result = Mysql.result option
+type error_code = 
+ | OK
+ | Table_exists_error
+ | Dup_keyname
+ | No_such_table
+ | No_such_index
+ | Bad_table_error
+ | GENERIC_ERROR of string
+exception Error of string
+
+let profiler = HExtlib.profile "mysql"
+
+let quick_connect ?host ?database ?port ?password ?user () =
+ profiler.HExtlib.profile 
+   (fun () ->
+      Some (Mysql.quick_connect ?host ?database ?port ?password ?user ())) 
+   ()
+;;
+
+let disconnect = function 
+  | None -> ()
+  | Some dbd -> profiler.HExtlib.profile Mysql.disconnect dbd
+
+let escape s =
+ profiler.HExtlib.profile Mysql.escape s
+
+let exec s dbd =
+  match dbd with
+  | None -> None 
+  | Some dbd -> 
+     try 
+      Some (profiler.HExtlib.profile (Mysql.exec dbd) s)
+     with Mysql.Error s -> raise (Error s)
+
+let map res ~f =
+  match res with 
+  | None ->  []
+  | Some res -> 
+      let map f = Mysql.map res ~f in
+      profiler.HExtlib.profile map f
+
+let iter res ~f =
+  match res with 
+  | None ->  	()
+  | Some res -> 
+      let iter f = Mysql.iter res ~f in
+      profiler.HExtlib.profile iter f
+
+let errno = function 
+  | None -> GENERIC_ERROR "Mysql.Connection_error"
+  | Some dbd -> 
+      match Mysql.errno dbd with
+      | Mysql.No_such_table -> No_such_table
+      | Mysql.Table_exists_error -> Table_exists_error
+      | Mysql.Dup_keyname -> Dup_keyname
+      | Mysql.No_such_index -> No_such_index
+      | Mysql.Bad_table_error -> Bad_table_error
+      | _ -> GENERIC_ERROR "Mysql_generic_error"
+;;
+
+let isMysql = true
+
+let escape_string_for_like = ("ESCAPE \"\\\\\"" : ('a,'b,'c,'a) format4);;