-(* 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://www.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 get_prop_id prop =
- if prop="refObj" then "F"
- else if prop="backPointer" then "B"
- else assert false
- ;;
-
-
-let relation_ex rop path rset attl =
- let usek = get_prop_id (List.hd path) in
-
-let _ = print_string ("RELATION "^usek)
-and t = Sys.time () in
-let result =
- let c = pgc () in
- Sort.list
- (fun (uri1-> uri1 < uri2)
- (List.fold_left
- (fun parziale (uri,aset)->
- print_string uri ;
- let tv =
- pgresult_to_string
- (c#exec ("select id from registry where uri='" ^ uri ^ "'"))
- in
- let qq =
- "select uri, context from t" ^ tv ^ " where prop_id='" ^ usek ^
- "' order by uri asc"
- in
- let res = c#exec qq in
- (List.map
- (function
- [uri;context] -> {S.uri = uri ; S.attributes = [asvar, context] ; S.extra = ""}
- | _ -> assert false
- ) res#get_list
- ) @
- parziale
- ) [] rset
- )
-in
-print_string (" = " ^ string_of_int (List.length result) ^ ": ") ;
-print_endline (string_of_float (Sys.time () -. t) ^ "s") ;
-flush stdout ;
- result
-;;
-