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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 2 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   * sqlsrv 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 v2 or later
  25   */
  26  
  27  defined('MOODLE_INTERNAL') || die();
  28  
  29  require_once (__DIR__.'/moodle_temptables.php');
  30  
  31  /**
  32   * This class is not specific to the SQL Server Native Driver but rather
  33   * to the family of Microsoft SQL Servers.
  34   *
  35   * @package    core_dml
  36   * @copyright  2009 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
  37   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v2 or later
  38   */
  39  class sqlsrv_native_moodle_temptables extends moodle_temptables {
  40  
  41      /**
  42       * Add one temptable to the store.
  43       *
  44       * Overriden because SQLSRV requires to add # for local (session) temporary
  45       * tables before the prefix.
  46       *
  47       * Given one moodle temptable name (without prefix), add it to the store, with the
  48       * key being the original moodle name and the value being the real db temptable name
  49       * already prefixed
  50       *
  51       * Override and use this *only* if the database requires modification in the table name.
  52       *
  53       * @param string $tablename name without prefix of the table created as temptable
  54       */
  55      public function add_temptable($tablename) {
  56          // TODO: throw exception if exists: if ($this->is_temptable...
  57          $this->temptables[$tablename] = '#' . $this->prefix . $tablename;
  58      }
  59  }