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Long Term Support Release
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 * OCI specific temptables store. Needed because temporary tables 19 * in Oracle are global (to all sessions), so we need to rename them 20 * on the fly in order to get local (different for each session) table names. 21 * Also used to be able to retrieve temp table names included in the get_tables() 22 * method of the DB. 23 * 24 * @package core_dml 25 * @copyright 2009 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com} 26 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later 27 */ 28 29 defined('MOODLE_INTERNAL') || die(); 30 31 require_once (__DIR__.'/moodle_temptables.php'); 32 33 class oci_native_moodle_temptables extends moodle_temptables { 34 35 /** @var int To store unique_session_id. Needed for temp tables unique naming (upto 24cc) */ 36 protected $unique_session_id; // 37 /** @var int To get incrementally different temptable names on each add_temptable() request */ 38 protected $counter; 39 40 /** 41 * Creates new moodle_temptables instance 42 * @param object moodle_database instance 43 */ 44 public function __construct($mdb, $unique_session_id) { 45 $this->unique_session_id = $unique_session_id; 46 $this->counter = 1; 47 parent::__construct($mdb); 48 } 49 50 /** 51 * Add one temptable to the store. 52 * 53 * Overridden because OCI only support global temptables, so we need to change completely the name, based 54 * in unique session identifier, to get local-like temp tables support 55 * tables before the prefix. 56 * 57 * Given one moodle temptable name (without prefix), add it to the store, with the 58 * key being the original moodle name and the value being the real db temptable name 59 * already prefixed 60 * 61 * Override and use this *only* if the database requires modification in the table name. 62 * 63 * @param string $tablename name without prefix of the table created as temptable 64 */ 65 public function add_temptable($tablename) { 66 // TODO: throw exception if exists: if ($this->is_temptable... 67 $this->temptables[$tablename] = $this->prefix . $this->unique_session_id . $this->counter; 68 $this->counter++; 69 } 70 }
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