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Current File : C:/Users/Mahmood/Desktop/moodle/lib/ddllib.php |
<?php // This file is part of Moodle - http://moodle.org/ // // Moodle 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, either version 3 of the License, or // (at your option) any later version. // // Moodle 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 Moodle. If not, see <http://www.gnu.org/licenses/>. /** * This library includes all the required functions used to handle the DB * structure (DDL) independently of the underlying RDBMS in use. * * This library includes all the required functions used to handle the DB * structure (DDL) independently of the underlying RDBMS in use. All the functions * rely on the XMLDBDriver classes to be able to generate the correct SQL * syntax needed by each DB. * * To define any structure to be created we'll use the schema defined * by the XMLDB classes, for tables, fields, indexes, keys and other * statements instead of direct handling of SQL sentences. * * This library should be used, exclusively, by the installation and * upgrade process of Moodle. * * For further documentation, visit {@link http://docs.moodle.org/en/DDL_functions} * * @package core * @subpackage ddl * @copyright 2001-3001 Eloy Lafuente (stronk7) http://contiento.com * 2008 Petr Skoda http://skodak.org * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ defined('MOODLE_INTERNAL') || die(); // Add required library require_once($CFG->libdir.'/xmlize.php'); // Add required XMLDB constants require_once($CFG->libdir.'/xmldb/xmldb_constants.php'); // Add required XMLDB DB classes require_once($CFG->libdir.'/xmldb/xmldb_object.php'); // Add required XMLDB DB classes require_once($CFG->libdir.'/xmldb/xmldb_file.php'); // Add required XMLDB DB classes require_once($CFG->libdir.'/xmldb/xmldb_structure.php'); // Add required XMLDB DB classes require_once($CFG->libdir.'/xmldb/xmldb_table.php'); // Add required XMLDB DB classes require_once($CFG->libdir.'/xmldb/xmldb_field.php'); // Add required XMLDB DB classes require_once($CFG->libdir.'/xmldb/xmldb_key.php'); // Add required XMLDB DB classes require_once($CFG->libdir.'/xmldb/xmldb_index.php'); require_once($CFG->libdir.'/ddl/sql_generator.php'); require_once($CFG->libdir.'/ddl/database_manager.php'); /** * DDL exception class, use instead of print_error() and "return false;" in ddl code. */ class ddl_exception extends moodle_exception { /** * @param string $errorcode * @param string $debuginfo */ function __construct($errorcode, $a=NULL, $debuginfo=null) { parent::__construct($errorcode, '', '', $a, $debuginfo); } } /** * Table does not exist problem exception */ class ddl_table_missing_exception extends ddl_exception { /** * @param string $tablename * @param string $debuginfo */ function __construct($tablename, $debuginfo=null) { parent::__construct('ddltablenotexist', $tablename, $debuginfo); } } /** * Table does not exist problem exception */ class ddl_field_missing_exception extends ddl_exception { /** * @param string $fieldname * @param string $tablename * @param string $debuginfo */ function __construct($fieldname, $tablename, $debuginfo=null) { $a = new stdClass(); $a->fieldname = $fieldname; $a->tablename = $tablename; parent::__construct('ddlfieldnotexist', $a, $debuginfo); } } /** * Error during changing db structure */ class ddl_change_structure_exception extends ddl_exception { /** @var string */ public $error; public $sql; /** * @param string $error * @param string $sql */ function __construct($error, $sql=null) { $this->error = $error; $this->sql = $sql; $errorinfo = $error."\n".$sql; parent::__construct('ddlexecuteerror', NULL, $errorinfo); } } /** * Error changing db structure, caused by some dependency found * like trying to modify one field having related indexes. */ class ddl_dependency_exception extends ddl_exception { function __construct($targettype, $targetname, $offendingtype, $offendingname, $debuginfo=null) { $a = new stdClass(); $a->targettype = $targettype; $a->targetname = $targetname; $a->offendingtype = $offendingtype; $a->offendingname = $offendingname; parent::__construct('ddldependencyerror', $a, $debuginfo); } }