X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=helm%2Focaml%2Fmathql_interpreter%2FmQIPostgres.ml;fp=helm%2Focaml%2Fmathql_interpreter%2FmQIPostgres.ml;h=0000000000000000000000000000000000000000;hb=1696761e4b8576e8ed81caa905fd108717019226;hp=916f787321daf86eada1f1224d1cd0be2efcc383;hpb=5325734bc2e4927ed7ec146e35a6f0f2b49f50c1;p=helm.git

diff --git a/helm/ocaml/mathql_interpreter/mQIPostgres.ml b/helm/ocaml/mathql_interpreter/mQIPostgres.ml
deleted file mode 100644
index 916f78732..000000000
--- a/helm/ocaml/mathql_interpreter/mQIPostgres.ml
+++ /dev/null
@@ -1,94 +0,0 @@
-(* 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/.
- *)
-
-(*  AUTOR: Ferruccio Guidi <fguidi@cs.unibo.it>
- *)
-
-let init () =
-   let connection_string =
-      Helm_registry.get "mathql_interpreter.postgresql_connection_string"
-   in
-   try new Postgres.connection connection_string
-   with _ -> raise (Failure "mqi_connecion")
-
-let close c = c#close
-
-let quote s =
-   let rec quote_aux s =
-      try
-         let l = String.length s in
-         let i = String.index s '\'' in
-         String.sub s 0 i ^ "\\'" ^ quote_aux (String.sub s (succ i) (l - (succ i)))
-      with Not_found -> s
-   in
-   "'" ^ quote_aux s ^ "'"
-
-let exec (c, out) q = out q; (c#exec q)#get_list
-
-let exec c table cols ct cfl =
-   let rec iter f last sep = function
-      | []           -> last
-      | [head]       -> f head 
-      | head :: tail -> f head ^ sep ^ iter f last sep tail
-   in
-   let pg_cols = iter (fun x -> x) "" ", " cols in
-   let pg_msval v = iter quote "" ", " v in
-   let pg_con (pat, col, v) = 
-      if col <> "" then 
-         let f s = col ^ " ~ " ^ quote ("^" ^ s ^ "$") in
-         if pat then "(" ^ iter f "false" " or " v ^ ")"
-         else match v with 
-            | [s] -> col ^ " = " ^ (quote s)     
-            | v   -> col ^ " in (" ^ pg_msval v ^ ")"
-      else "true"
-   in
-   let pg_cons l = iter pg_con "true" " and " l in
-   let pg_cons_not l = "not (" ^ pg_cons l ^ ")" in
-   let pg_cons_not_l ll = iter pg_cons_not "true" " and " ll in
-   let pg_where = match ct, cfl with
-      | [], []  -> ""
-      | lt, []  -> " where " ^ pg_cons lt
-      | [], llf -> " where " ^ pg_cons_not_l llf
-      | lt, llf -> " where " ^ pg_cons lt ^ " and " ^ pg_cons_not_l llf
-   in
-   if cols = [] then
-      let r = exec c ("select count(source) from " ^ table ^ pg_where) in
-      match r with
-         | [[s]] when int_of_string s > 0 -> [[]]
-         | _                              -> []
-   else
-      exec c ("select " ^ pg_cols ^ " from " ^ table ^ pg_where ^ 
-            " order by " ^ List.hd cols ^ " asc")
-
-(* funzioni vecchie  ********************************************************)
-(*
-let pg_name h s = 
-   let q = "select id from registry where uri = " ^ quote s in
-   match exec h q with
-      | [[id]] -> "t" ^ id
-      | _      -> ""
-
-let get_id b = if b then ["B"] else ["F"] 
-*)