mysql.php

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<?php
// +----------------------------------------------------------------------+
// | PHP Version 4                                                        |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox,                 |
// | Stig. S. Bakken, Lukas Smith                                         |
// | All rights reserved.                                                 |
// +----------------------------------------------------------------------+
// | MDB is a merge of PEAR DB and Metabases that provides a unified DB   |
// | API as well as database abstraction for PHP applications.            |
// | This LICENSE is in the BSD license style.                            |
// |                                                                      |
// | Redistribution and use in source and binary forms, with or without   |
// | modification, are permitted provided that the following conditions   |
// | are met:                                                             |
// |                                                                      |
// | Redistributions of source code must retain the above copyright       |
// | notice, this list of conditions and the following disclaimer.        |
// |                                                                      |
// | Redistributions in binary form must reproduce the above copyright    |
// | notice, this list of conditions and the following disclaimer in the  |
// | documentation and/or other materials provided with the distribution. |
// |                                                                      |
// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
// | Lukas Smith nor the names of his contributors may be used to endorse |
// | or promote products derived from this software without specific prior|
// | written permission.                                                  |
// |                                                                      |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
// | POSSIBILITY OF SUCH DAMAGE.                                          |
// +----------------------------------------------------------------------+
// | Author: Lukas Smith <[e-mail]>                         |
// +----------------------------------------------------------------------+
//
// $Id: mysql.php,v 1.44.4.10 2004/04/19 20:21:51 lsmith Exp $
//

if(!defined('MDB_MANAGER_MYSQL_INCLUDED'))
{
    define('MDB_MANAGER_MYSQL_INCLUDED', 1);

require_once('MDB/Modules/Manager/Common.php');

/**
 * MDB MySQL driver for the management modules
 *
 * @package MDB
 * @category Database
 * @access private
 * @author  Lukas Smith <[e-mail]>
 */
class MDB_Manager_mysql extends MDB_Manager_Common
{
    // {{{ properties
    var $verified_table_types = array();

    // }}}
    // {{{ _verifyTransactionalTableType()

    /**
     * verify that chosen transactional table hanlder is available in the database
     *
     * @param object    $db        database object that is extended by this class
     * @param string $table_type name of the table handler
     * @return mixed MDB_OK on success, a MDB error on failure
     * @access private
     */
    function _verifyTransactionalTableType(&$db, $table_type)
    {
        switch(strtoupper($table_type)) {
            case 'BERKELEYDB':
            case 'BDB':
                $check = array('have_bdb');
                break;
            case 'INNODB':
                $check = array('have_innobase', 'have_innodb');
                break;
            case 'GEMINI':
                $check = array('have_gemini');
                break;
            case 'HEAP':
            case 'ISAM':
            case 'MERGE':
            case 'MRG_MYISAM':
            case 'MYISAM':
            case '':
                return(MDB_OK);
            default:
                return($db->raiseError(MDB_ERROR_UNSUPPORTED, NULL, NULL,
                    'Verify transactional table',
                    $table_type.' is not a supported table type'));
        }
        if(isset($this->verified_table_types[$table_type])
            && $this->verified_table_types[$table_type] == $db->connection)
        {
            return(MDB_OK);
        }
        $not_supported = FALSE;
        for($i=0, $j=count($check); $i<$j; ++$i) {
            $query = 'SHOW VARIABLES LIKE '.$db->getValue('text', $check[$i]);
            $has = $db->queryRow($query, NULL, MDB_FETCHMODE_ORDERED);
            if (MDB::isError($has)) {
                return $has;
            }
            if (is_array($has)) {
                $not_supported = TRUE;
                if ($has[1] == 'YES') {
                    $this->verified_table_types[$table_type] = $db->connection;
                    return(MDB_OK);
                }
            }
        }
        if ($not_supported) {
            return($db->raiseError(MDB_ERROR_UNSUPPORTED, null, null,
                $table_type.' is not a supported table type by this MySQL database server'));
        }
        return($db->raiseError(MDB_ERROR_UNSUPPORTED, null, null,
            'could not tell if '.$table_type.' is a supported table type'));
    }

    // }}}
    // {{{ createDatabase()

    /**
     * create a new database
     *
     * @param object    $db        database object that is extended by this class
     * @param string $name name of the database that should be created
     * @return mixed MDB_OK on success, a MDB error on failure
     * @access public
     */
    function createDatabase(&$db, $name)
    {
        if (MDB::isError($result = $db->connect())) {
            return($result);
        }
        $query = 'CREATE DATABASE '.$name;
        if(MDB::isError($db->query($query))) {
            return($db->mysqlRaiseError());
        }

        return(MDB_OK);
    }

    // }}}
    // {{{ dropDatabase()

    /**
     * drop an existing database
     *
     * @param object    $db        database object that is extended by this class
     * @param string $name name of the database that should be dropped
     * @return mixed MDB_OK on success, a MDB error on failure
     * @access public
     */
    function dropDatabase(&$db, $name)
    {
        if (MDB::isError($result = $db->connect())) {
            return($result);
        }
        $query = 'DROP DATABASE '.$name;
        if(MDB::isError($db->query($query))) {
            return($db->mysqlRaiseError());
        }
        return(MDB_OK);
    }

    // }}}
    // {{{ createTable()

    /**
     * create a new table
     *
     * @param object    $db        database object that is extended by this class
     * @param string $name     Name of the database that should be created
     * @param array $fields Associative array that contains the definition of
     *                      each field of the new table. The indexes of the array
     *                      entries are the names of the fields of the table an
     *                      the array entry values are associative arrays like
     *                      those that are meant to be passed with the field
     *                      definitions to get[Type]Declaration() functions.
     *
     *                        Example
     *                        array(
     *
     *                            'id' => array(
     *                                'type' => 'integer',
     *                                'unsigned' => 1
     *                                'notnull' => 1
     *                                'default' => 0
     *                            ),
     *                            'name' => array(
     *                                'type' => 'text',
     *                                'length' => 12
     *                            ),
     *                            'password' => array(
     *                                'type' => 'text',
     *                                'length' => 12
     *                            )
     *                        );
     * @return mixed MDB_OK on success, a MDB error on failure
     * @access public
     */
    function createTable(&$db, $name, $fields)
    {
        if (!isset($name) || !strcmp($name, '')) {
            return($db->raiseError(MDB_ERROR_CANNOT_CREATE, NULL, NULL,
                'no valid table name specified'));
        }
        if (count($fields) == 0) {
            return($db->raiseError(MDB_ERROR_CANNOT_CREATE, NULL, NULL,
                'no fields specified for table "'.$name.'"'));
        }
        $verify = $this->_verifyTransactionalTableType($db, $db->default_table_type);
        if(MDB::isError($verify)) {
            return($verify);
        }
        if (MDB::isError($query_fields = $db->getFieldDeclarationList($fields))) {
            return($db->raiseError(MDB_ERROR_CANNOT_CREATE, NULL, NULL, 'unkown error'));
        }
        if (isset($db->supported['Transactions'])
            && $db->default_table_type=='BDB'
        ) {
            $query_fields .= ', dummy_primary_key INT NOT NULL AUTO_INCREMENT, PRIMARY KEY (dummy_primary_key)';
        }
        $query = "CREATE TABLE $name ($query_fields)".
            (strlen($db->default_table_type) ? ' TYPE='.$db->default_table_type : '');

        return($db->query($query));
    }

    // }}}
    // {{{ alterTable()

    /**
     * alter an existing table
     *
     * @param object    $db        database object that is extended by this class
     * @param string $name         name of the table that is intended to be changed.
     * @param array $changes     associative array that contains the details of each type
     *                             of change that is intended to be performed. The types of
     *                             changes that are currently supported are defined as follows:
     *
     *                             name
     *
     *                                New name for the table.
     *
     *                            AddedFields
     *
     *                                Associative array with the names of fields to be added as
     *                                 indexes of the array. The value of each entry of the array
     *                                 should be set to another associative array with the properties
     *                                 of the fields to be added. The properties of the fields should
     *                                 be the same as defined by the Metabase parser.
     *
     *                                Additionally, there should be an entry named Declaration that
     *                                 is expected to contain the portion of the field declaration already
     *                                 in DBMS specific SQL code as it is used in the CREATE TABLE statement.
     *
     *                            RemovedFields
     *
     *                                Associative array with the names of fields to be removed as indexes
     *                                 of the array. Currently the values assigned to each entry are ignored.
     *                                 An empty array should be used for future compatibility.
     *
     *                            RenamedFields
     *
     *                                Associative array with the names of fields to be renamed as indexes
     *                                 of the array. The value of each entry of the array should be set to
     *                                 another associative array with the entry named name with the new
     *                                 field name and the entry named Declaration that is expected to contain
     *                                 the portion of the field declaration already in DBMS specific SQL code
     *                                 as it is used in the CREATE TABLE statement.
     *
     *                            ChangedFields
     *
     *                                Associative array with the names of the fields to be changed as indexes
     *                                 of the array. Keep in mind that if it is intended to change either the
     *                                 name of a field and any other properties, the ChangedFields array entries
     *                                 should have the new names of the fields as array indexes.
     *
     *                                The value of each entry of the array should be set to another associative
     *                                 array with the properties of the fields to that are meant to be changed as
     *                                 array entries. These entries should be assigned to the new values of the
     *                                 respective properties. The properties of the fields should be the same
     *                                 as defined by the Metabase parser.
     *
     *                                If the default property is meant to be added, removed or changed, there
     *                                 should also be an entry with index ChangedDefault assigned to 1. Similarly,
     *                                 if the notnull constraint is to be added or removed, there should also be
     *                                 an entry with index ChangedNotNull assigned to 1.
     *
     *                                Additionally, there should be an entry named Declaration that is expected
     *                                 to contain the portion of the field changed declaration already in DBMS
     *                                 specific SQL code as it is used in the CREATE TABLE statement.
     *                            Example
     *                                array(
     *                                    'name' => 'userlist',
     *                                    'AddedFields' => array(
     *                                        'quota' => array(
     *                                            'type' => 'integer',
     *                                            'unsigned' => 1
     *                                            'Declaration' => 'quota INT'
     *                                        )
     *                                    ),
     *                                    'RemovedFields' => array(
     *                                        'file_limit' => array(),
     *                                        'time_limit' => array()
     *                                        ),
     *                                    'ChangedFields' => array(
     *                                        'gender' => array(
     *                                            'default' => 'M',
     *                                            'ChangeDefault' => 1,
     *                                            'Declaration' => "gender CHAR(1) DEFAULT 'M'"
     *                                        )
     *                                    ),
     *                                    'RenamedFields' => array(
     *                                        'sex' => array(
     *                                            'name' => 'gender',