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

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-(* Copyright (C) 2000, 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/.
- *)
-
-(*
- * implementazione dei comandi USE/USED BY
- *)
-
-open Utility;;
-open Dbconn;;
-
-(*
- * implementazione dei comandi USE/USED BY
- *
- * parametri:
- * alist: string list list; lista su cui eseguire il comando USE/USED BY
- * asvar: string; nome della variabile del comando use
- * usek: string; nome della tabella in cui ricercare le occorrenze;
- *               la distinzione fra l'esecuzione del comando USE e USED BY
- *               sta nell'utilizzo della tabella 'backPointer' per USE
- *               e 'refObj' per USED BY
- *
- * output: string list list; lista su cui e' stato eseguito il 
- *                           comando USE/USED BY
- *)
-let use_ex alist asvar usek =
-let module S = Mathql_semantics in
-let _ = print_string ("USE ")
-and t = Unix.time () in
-let result =
- let c = pgc () in
-  Sort.list
-   (fun {S.uri = uri1} {S.uri = uri2} -> uri1 < uri2)
-   (List.fold_left
-    (fun parziale {S.uri = uri ; S.attributes = attributes} ->
-     print_string uri ;
-     (*let r1 = helm_property_id usek
-     and r2 = helm_property_id "position"
-     and r3 = helm_property_id "occurrence"
-     in
-      let qq = "select distinct t" ^ r3 ^ ".att1, t" ^ r2 ^ ".att1 " ^
-       "from t" ^ r3 ^ ", t" ^ r2 ^ ", t" ^ r1 ^ " " ^
-       "where " ^ "t" ^ r1 ^ ".att0 = '" ^ (List.hd xres) ^ "' and t" ^ r1 ^
-       ".att1 = t" ^ r2 ^ ".att0 and t" ^ r1 ^ ".att1 = t" ^ r3 ^
-       ".att0 order by t" ^ r3 ^ ".att1 asc"*)
-      let tv =
-       pgresult_to_string
-        (c#exec ("select id from registry where uri='" ^ uri ^ "'"))
-      in
-      let qq =
-       "select uri, context from t" ^ tv ^ " where back_for='" ^ usek ^
-        "' order by uri asc"
-      in
-      let res = c#exec qq in
-       (List.map
-        (function
-            [uri;context] -> {S.uri = uri ; S.attributes = [asvar, context]}
-          | _ -> assert false
-        ) res#get_list
-       ) @
-       parziale
-    ) [] alist
-   )
-in
-print_string (" = " ^ string_of_int (List.length result) ^ ": ") ; 
-print_endline (string_of_float (Unix.time () -. t) ^ "s") ;
-flush stdout ;
-   result
-;;
-