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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/.
+ *)
+
+(**
+ * {2 Proxy module around MySQL conection}
+ *
+ * The behaviour of this module is influenced by the Helm_registry boolean value
+ * of the "db.nodb" key. When set to "false" the module works as expected. When
+ * set to "true" all functions perform dummy action: connect and disconnect do
+ * nothing; exec, iter, and map work like the empty set of results has been
+ * returned; errno and status return Mysql.Connection_error
+ *)
+
+type dbd
+type result
+
+(* the exceptions raised are from the Mysql module *)
+
+val quick_connect :
+  ?host:string ->
+  ?database:string ->
+  ?port:int -> ?password:string -> ?user:string -> unit -> dbd
+
+val disconnect : dbd -> unit
+
+val exec: dbd -> string -> result
+val map : result -> f:(string option array -> 'a) -> 'a list
+val iter : result -> f:(string option array -> unit) -> unit
+
+val errno : dbd -> Mysql.error_code
+val status : dbd -> Mysql.status
+
+val escape: string -> string
+