1 (* Copyright (C) 2000, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
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15 * GNU General Public License for more details.
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22 * For details, see the HELM World-Wide-Web page,
23 * http://cs.unibo.it/helm/.
27 * implementazione dei comandi USE/USED BY
34 * implementazione dei comandi USE/USED BY
37 * alist: string list list; lista su cui eseguire il comando USE/USED BY
38 * asvar: string; nome della variabile del comando use
39 * usek: string; nome della tabella in cui ricercare le occorrenze;
40 * la distinzione fra l'esecuzione del comando USE e USED BY
41 * sta nell'utilizzo della tabella 'backPointer' per USE
42 * e 'refObj' per USED BY
44 * output: string list list; lista su cui e' stato eseguito il
47 let use_ex alist asvar usek =
48 let module S = Mathql_semantics in
49 let _ = print_string ("USE ")
50 and t = Unix.time () in
54 (fun {S.uri = uri1} {S.uri = uri2} -> uri1 < uri2)
56 (fun parziale {S.uri = uri ; S.attributes = attributes} ->
58 (*let r1 = helm_property_id usek
59 and r2 = helm_property_id "position"
60 and r3 = helm_property_id "occurrence"
62 let qq = "select distinct t" ^ r3 ^ ".att1, t" ^ r2 ^ ".att1 " ^
63 "from t" ^ r3 ^ ", t" ^ r2 ^ ", t" ^ r1 ^ " " ^
64 "where " ^ "t" ^ r1 ^ ".att0 = '" ^ (List.hd xres) ^ "' and t" ^ r1 ^
65 ".att1 = t" ^ r2 ^ ".att0 and t" ^ r1 ^ ".att1 = t" ^ r3 ^
66 ".att0 order by t" ^ r3 ^ ".att1 asc"*)
69 (c#exec ("select id from registry where uri='" ^ uri ^ "'"))
72 "select uri, context from t" ^ tv ^ " where back_for='" ^ usek ^
75 let res = c#exec qq in
78 [uri;context] -> {S.uri = uri ; S.attributes = [asvar, context]}
86 print_string (" = " ^ string_of_int (List.length result) ^ ": ") ;
87 print_endline (string_of_float (Unix.time () -. t) ^ "s") ;