mssql.php

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<?php
// +----------------------------------------------------------------------+
// | PHP versions 4 and 5                                                 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |
// | Stig. S. Bakken, Lukas Smith                                         |
// | All rights reserved.                                                 |
// +----------------------------------------------------------------------+
// | MDB2 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.                                          |
// +----------------------------------------------------------------------+
// | Authors: Frank M. Kromann <[e-mail]>                       |
// |          David Coallier <[e-mail]>                             |
// |          Lorenzo Alberton <[e-mail]>                      |
// +----------------------------------------------------------------------+
//
// $Id: mssql.php,v 1.109 2008/03/05 12:55:57 afz Exp $
//

require_once 'MDB2/Driver/Manager/Common.php';

// {{{ class MDB2_Driver_Manager_mssql

/**
 * MDB2 MSSQL driver for the management modules
 *
 * @package MDB2
 * @category Database
 * @author  Frank M. Kromann <[e-mail]>
 * @author  David Coallier <[e-mail]>
 * @author  Lorenzo Alberton <[e-mail]>
 */
class MDB2_Driver_Manager_mssql extends MDB2_Driver_Manager_Common
{
    // {{{ createDatabase()
    /**
     * create a new database
     *
     * @param string $name    name of the database that should be created
     * @param array  $options array with collation info
     *
     * @return mixed MDB2_OK on success, a MDB2 error on failure
     * @access public
     */
    function createDatabase($name, $options = array())
    {
        $db =& $this->getDBInstance();
        if (PEAR::isError($db)) {
            return $db;
        }

        $name = $db->quoteIdentifier($name, true);
        $query = "CREATE DATABASE $name";
        if ($db->options['database_device']) {
            $query.= ' ON '.$db->options['database_device'];
            $query.= $db->options['database_size'] ? '=' .
                     $db->options['database_size'] : '';
        }
        if (!empty($options['collation'])) {
            $query .= ' COLLATE ' . $options['collation'];
        }
        return $db->standaloneQuery($query, null, true);
    }

    // }}}
    // {{{ alterDatabase()

    /**
     * alter an existing database
     *
     * @param string $name    name of the database that is intended to be changed
     * @param array  $options array with name, collation info
     *
     * @return mixed MDB2_OK on success, a MDB2 error on failure
     * @access public
     */
    function alterDatabase($name, $options = array())
    {
        $db =& $this->getDBInstance();
        if (PEAR::isError($db)) {
            return $db;
        }

        $query = '';
        if (!empty($options['name'])) {
            $query .= ' MODIFY NAME = ' .$db->quoteIdentifier($options['name'], true);
        }
        if (!empty($options['collation'])) {
            $query .= ' COLLATE ' . $options['collation'];
        }
        if (!empty($query)) {
            $query = 'ALTER DATABASE '. $db->quoteIdentifier($name, true) . $query;
            return $db->standaloneQuery($query, null, true);
        }
        return MDB2_OK;
    }

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

    /**
     * drop an existing database
     *
     * @param string $name name of the database that should be dropped
     *
     * @return mixed MDB2_OK on success, a MDB2 error on failure
     * @access public
     */
    function dropDatabase($name)
    {
        $db =& $this->getDBInstance();
        if (PEAR::isError($db)) {
            return $db;
        }

        $name = $db->quoteIdentifier($name, true);
        return $db->standaloneQuery("DROP DATABASE $name", null, true);
    }

    // }}}
    // {{{ _getTemporaryTableQuery()

    /**
     * Override the parent method.
     *
     * @return string The string required to be placed between "CREATE" and "TABLE"
     *                to generate a temporary table, if possible.
     */
    function _getTemporaryTableQuery()
    {
        return '';
    }

    // }}}
    // {{{ _getAdvancedFKOptions()

    /**
     * Return the FOREIGN KEY query section dealing with non-standard options
     * as MATCH, INITIALLY DEFERRED, ON UPDATE, ...
     *
     * @param array $definition
     *
     * @return string
     * @access protected
     */
    function _getAdvancedFKOptions($definition)
    {
        $query = '';
        if (!empty($definition['onupdate'])) {
            $query .= ' ON UPDATE '.$definition['onupdate'];
        }
        if (!empty($definition['ondelete'])) {
            $query .= ' ON DELETE '.$definition['ondelete'];
        }
        return $query;
    }

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

    /**
     * create a new table
     *
     * @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,
     *                            ),
     *                            'description' => array(
     *                                'type' => 'text',
     *                                'length' => 12,
     *                            )
     *                        );
     * @param array $options An associative array of table options:
     *                          array(
     *                              'comment' => 'Foo',
     *                              'temporary' => true|false,
     *                          );
     *
     * @return mixed MDB2_OK on success, a MDB2 error on failure
     * @access public
     */
    function createTable($name, $fields, $options = array())
    {
        if (!empty($options['temporary'])) {
            $name = '#'.$name;
        }
        return parent::createTable($name, $fields, $options);
    }

    // }}}
    // {{{ truncateTable()

    /**
     * Truncate an existing table (if the TRUNCATE TABLE syntax is not supported,
     * it falls back to a DELETE FROM TABLE query)
     *
     * @param string $name name of the table that should be truncated
     * @return mixed MDB2_OK on success, a MDB2 error on failure
     * @access public
     */
    function truncateTable($name)
    {
        $db =& $this->getDBInstance();
        if (PEAR::isError($db)) {
            return $db;
        }

        $name = $db->quoteIdentifier($name, true);
        return $db->exec("TRUNCATE TABLE $name");
    }

    // }}}
    // {{{ vacuum()

    /**
     * Optimize (vacuum) all the tables in the db (or only the specified table)
     * and optionally run ANALYZE.
     *
     * @param string $table table name (all the tables if empty)
     * @param array  $options an array with driver-specific options:
     *               - timeout [int] (in seconds) [mssql-only]
     *               - analyze [boolean] [pgsql and mysql]
     *               - full [boolean] [pgsql-only]
     *               - freeze [boolean] [pgsql-only]
     *
     * NB: you have to run the NSControl Create utility to enable VACUUM
     *
     * @return mixed MDB2_OK success, a MDB2 error on failure
     * @access public
     */
    function vacuum($table = null, $options = array())
    {
        $db =& $this->getDBInstance();
        if (PEAR::isError($db)) {
            return $db;
        }
        $timeout = isset($options['timeout']) ? (int)$options['timeout'] : 300;

        $query = 'NSControl Create';
        $result = $db->exec($query);
        if (PEAR::isError($result)) {
            return $result;
        }

        return $db->exec('EXEC NSVacuum '.$timeout);
    }

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

    /**
     * alter an existing table
     *
     * @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.
     *
     *                            add
     *
     *                                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 MDB2 parser.
     *
     *
     *                            remove
     *
     *                                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.
     *
     *                            rename
     *
     *                                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.
     *
     *                            change
     *
     *                                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 change 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 MDB2 parser.
     *
     *                            Example
     *                                array(
     *                                    'name' => 'userlist',
     *                                    'add' => array(
     *                                        'quota' => array(
     *                                            'type' => 'integer',
     *                                            'unsigned' => 1
     *                                        )
     *                                    ),
     *                                    'remove' => array(
     *                                        'file_limit' => array(),
     *                                        'time_limit' => array()
     *                                    ),
     *                                    'change' => array(
     *                                        'name' => array(
     *                                            'length' => '20',
     *                                            'definition' => array(
     *                                                'type' => 'text',
     *                                                'length' => 20,
     *                                            ),
     *                                        )
     *                                    ),
     *                                    'rename' => array(
     *                                        'sex' => array(
     *                                            'name' => 'gender',
     *                                            'definition' => array(
     *                                                'type' => 'text',
     *                                                'length' => 1,
     *                                                'default' => 'M',
     *                                            ),
     *                                        )
     *                                    )
     *                                )