lib/dml/mssql_native_moodle_temptables.php

   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 }