Search engine redesign, first part :

- new table #search to store search rules associated to a search id.

- search rules are not passed through GET anymore, the search array build in
  search.php is serialized in #search table, so no need to rebuild it in
  function include/functions_category.inc.php::category_initialize

- search array build code is improved (efficiency and layout) in search.php

- SQL related to search is build in a dedicated function
  include/functions::get_sql_search_clause

- direct search author:<...>, date_avalaible:<...>, date_creation:<...>,
  keywords:<...> from picture.php are not available anymore. They will come
  back later, with improvement (new design). Same for date_*:<> in calendar
  calendar category.


git-svn-id: http://piwigo.org/svn/trunk@1008 68402e56-0260-453c-a942-63ccdbb3a9ee

install/db/4-database.php

@@ -0,0 +1,54 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | PhpWebGallery - a PHP based picture gallery                           |
+// | Copyright (C) 2002-2003 Pierrick LE GALL - pierrick@phpwebgallery.net |
+// | Copyright (C) 2003-2005 PhpWebGallery Team - http://phpwebgallery.net |
+// +-----------------------------------------------------------------------+
+// | branch        : BSF (Best So Far)
+// | file          : $RCSfile$
+// | last update   : $Date: 2005-09-21 00:04:57 +0200 (mer, 21 sep 2005) $
+// | last modifier : $Author: plg $
+// | revision      : $Revision: 870 $
+// +-----------------------------------------------------------------------+
+// | This program 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                                          |
+// |                                                                       |
+// | This program 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 this program; if not, write to the Free Software           |
+// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
+// | USA.                                                                  |
+// +-----------------------------------------------------------------------+
+
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+$upgrade_description = 'Table #search is required for search engine redesign';
+
+// +-----------------------------------------------------------------------+
+// |                            Upgrade content                            |
+// +-----------------------------------------------------------------------+
+
+// column user_id becomes data of type text
+$query = '
+CREATE TABLE '.PREFIX_TABLE.'search (
+  id int UNSIGNED NOT NULL AUTO_INCREMENT,
+  last_seen date DEFAULT NULL,
+  rules text,
+  PRIMARY KEY  (id)
+);';
+pwg_query($query);
+
+echo
+"\n"
+.'Table '.PREFIX_TABLE.'search created'
+."\n"
+;
+?>