Whithout List.hd error

[helm.git] / helm / ocaml / mathql_interpreter / dbconn.ml

diff --git a/helm/ocaml/mathql_interpreter/dbconn.ml b/helm/ocaml/mathql_interpreter/dbconn.ml
index e46f89cb280180659b58d43d31552feea343dd0b..a6b1b2cce8351f15345a5bc6f01509762e31b852 100644 (file)
--- a/helm/ocaml/mathql_interpreter/dbconn.ml
+++ b/helm/ocaml/mathql_interpreter/dbconn.ml
@@ -20,7 +20,7 @@
  * MA  02111-1307, USA.
  * 
  * For details, see the HELM World-Wide-Web page,
- * http://cs.unibo.it/helm/.
+ * http://www.cs.unibo.it/helm/.
  *)
 
 (*
@@ -33,14 +33,20 @@
  *)
 open MathQL;;
 
+exception MQInvalidURI of string
+exception MQConnectionFailed of string
+exception MQInvalidConnection of string
+
+
+
 (*
  * paramentri della connessione
  *
  * TODO: bisogna scegliere se questi parametri vengono
  * passati come argomento
  *)
-let connection_param = "dbname=helm";;
-(*let connection_param = "host=dotto.cs.unibo.it dbname=helm user=helm";;*)
+(*let connection_param = "dbname=helm";;*)
+let connection_param = "host=dotto.cs.unibo.it dbname=helm user=helm";;
 
 (*
  * connessione al db
@@ -53,7 +59,7 @@ let conn = ref None;;
 let pgc () =
    match !conn with
       None -> raise (MQInvalidConnection connection_param)
-   |  Some c -> c
+    | Some c -> c
 ;;
 
 (*