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   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * MSSQL specific temptables store. Needed because temporary tables
  19   * are named differently than normal tables. Also used to be able to retrieve
  20   * temp table names included in the get_tables() method of the DB.
  21   *
  22   * @package    core_dml
  23   * @copyright  2009 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
  24   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25   */
  26  
  27  defined('MOODLE_INTERNAL') || die();
  28  
  29  require_once (__DIR__.'/moodle_temptables.php');
  30  
  31  class mssql_native_moodle_temptables extends moodle_temptables {
  32  
  33      /**
  34       * Add one temptable to the store.
  35       *
  36       * Overriden because MSSQL requires to add # for local (session) temporary
  37       * tables before the prefix.
  38       *
  39       * Given one moodle temptable name (without prefix), add it to the store, with the
  40       * key being the original moodle name and the value being the real db temptable name
  41       * already prefixed
  42       *
  43       * Override and use this *only* if the database requires modification in the table name.
  44       *
  45       * @param string $tablename name without prefix of the table created as temptable
  46       */
  47      public function add_temptable($tablename) {
  48          // TODO: throw exception if exists: if ($this->is_temptable...
  49          $this->temptables[$tablename] = '#' . $this->prefix . $tablename;
  50      }
  51  }