441 lines
17 KiB
PHP
441 lines
17 KiB
PHP
<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* Index, constraint and alter methods for DB_Table usage with
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* PEAR::DB as backend.
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*
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* The code in this class was adopted from the MDB2 PEAR package.
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*
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* PHP versions 4 and 5
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*
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* LICENSE:
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*
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* Copyright (c) 1997-2007, Lukas Smith <smith@pooteeweet.org>
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* Paul M. Jones <pmjones@php.net>
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* David C. Morse <morse@php.net>
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* Mark Wiesemann <wiesemann@php.net>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * The names of the authors may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @category Database
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* @package DB_Table
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* @author Lukas Smith <smith@pooteeweet.org>
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* @author Mark Wiesemann <wiesemann@php.net>
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* @license http://opensource.org/licenses/bsd-license.php New BSD License
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* @version CVS: $Id: mysqli.php,v 1.6 2007/12/13 16:52:15 wiesemann Exp $
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* @link http://pear.php.net/package/DB_Table
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*/
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/**
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* require DB_Table class
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*/
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require_once 'DB/Table.php';
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/**
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* Index, constraint and alter methods for DB_Table usage with
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* PEAR::DB as backend.
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*
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* The code in this class was adopted from the MDB2 PEAR package.
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*
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* @category Database
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* @package DB_Table
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* @author Lukas Smith <smith@pooteeweet.org>
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* @author Mark Wiesemann <wiesemann@php.net>
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* @version Release: 1.5.6
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* @link http://pear.php.net/package/DB_Table
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*/
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class DB_Table_Manager_mysqli {
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/**
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*
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* The PEAR DB object that connects to the database.
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*
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* @access private
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*
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* @var object
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*
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*/
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var $_db = null;
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/**
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* list all indexes in a table
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*
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* @param string $table name of table that should be used in method
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* @return mixed data array on success, a PEAR error on failure
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* @access public
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*/
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function listTableIndexes($table)
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{
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$key_name = 'Key_name';
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$non_unique = 'Non_unique';
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$query = "SHOW INDEX FROM $table";
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$indexes = $this->_db->getAll($query, null, DB_FETCHMODE_ASSOC);
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if (PEAR::isError($indexes)) {
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return $indexes;
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}
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$result = array();
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foreach ($indexes as $index_data) {
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if ($index_data[$non_unique]) {
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$result[$index_data[$key_name]] = true;
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}
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}
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$result = array_change_key_case($result, CASE_LOWER);
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return array_keys($result);
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}
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/**
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* list all constraints in a table
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*
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* @param string $table name of table that should be used in method
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* @return mixed data array on success, a PEAR error on failure
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* @access public
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*/
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function listTableConstraints($table)
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{
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$key_name = 'Key_name';
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$non_unique = 'Non_unique';
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$query = "SHOW INDEX FROM $table";
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$indexes = $this->_db->getAll($query, null, DB_FETCHMODE_ASSOC);
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if (PEAR::isError($indexes)) {
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return $indexes;
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}
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$result = array();
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foreach ($indexes as $index_data) {
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if (!$index_data[$non_unique]) {
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if ($index_data[$key_name] !== 'PRIMARY') {
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$index = $index_data[$key_name];
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} else {
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$index = 'PRIMARY';
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}
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$result[$index] = true;
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}
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}
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$result = array_change_key_case($result, CASE_LOWER);
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return array_keys($result);
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}
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/**
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* get the structure of an index into an array
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*
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* @param string $table name of table that should be used in method
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* @param string $index_name name of index that should be used in method
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* @return mixed data array on success, a PEAR error on failure
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* @access public
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*/
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function getTableIndexDefinition($table, $index_name)
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{
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$result = $this->_db->query("SHOW INDEX FROM $table");
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if (PEAR::isError($result)) {
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return $result;
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}
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$definition = array();
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while (is_array($row = $result->fetchRow(DB_FETCHMODE_ASSOC))) {
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$row = array_change_key_case($row, CASE_LOWER);
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$key_name = $row['key_name'];
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$key_name = strtolower($key_name);
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if ($index_name == $key_name) {
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$column_name = $row['column_name'];
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$column_name = strtolower($column_name);
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$definition['fields'][$column_name] = array();
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if (array_key_exists('collation', $row)) {
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$definition['fields'][$column_name]['sorting'] = ($row['collation'] == 'A'
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? 'ascending' : 'descending');
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}
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}
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}
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$result->free();
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return $definition;
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}
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/**
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* get the structure of a constraint into an array
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*
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* @param string $table name of table that should be used in method
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* @param string $index_name name of index that should be used in method
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* @return mixed data array on success, a PEAR error on failure
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* @access public
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*/
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function getTableConstraintDefinition($table, $index_name)
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{
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$result = $this->_db->query("SHOW INDEX FROM $table");
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if (PEAR::isError($result)) {
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return $result;
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}
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$definition = array();
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while (is_array($row = $result->fetchRow(DB_FETCHMODE_ASSOC))) {
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$row = array_change_key_case($row, CASE_LOWER);
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$key_name = $row['key_name'];
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$key_name = strtolower($key_name);
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if ($index_name == $key_name) {
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if ($row['key_name'] == 'PRIMARY') {
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$definition['primary'] = true;
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} else {
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$definition['unique'] = true;
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}
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$column_name = $row['column_name'];
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$column_name = strtolower($column_name);
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$definition['fields'][$column_name] = array();
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if (array_key_exists('collation', $row)) {
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$definition['fields'][$column_name]['sorting'] = ($row['collation'] == 'A'
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? 'ascending' : 'descending');
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}
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}
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}
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$result->free();
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return $definition;
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}
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/**
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* drop existing index
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*
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* @param string $table name of table that should be used in method
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* @param string $name name of the index to be dropped
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* @return mixed DB_OK on success, a PEAR error on failure
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* @access public
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*/
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function dropIndex($table, $name)
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{
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$table = $this->_db->quoteIdentifier($table);
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$name = $this->_db->quoteIdentifier($name);
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return $this->_db->query("DROP INDEX $name ON $table");
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}
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/**
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* drop existing constraint
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*
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* @param string $table name of table that should be used in method
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* @param string $name name of the constraint to be dropped
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* @return mixed DB_OK on success, a PEAR error on failure
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* @access public
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*/
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function dropConstraint($table, $name)
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{
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$table = $this->_db->quoteIdentifier($table);
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if (strtolower($name) == 'primary') {
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$query = "ALTER TABLE $table DROP PRIMARY KEY";
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} else {
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$name = $this->_db->quoteIdentifier($name);
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$query = "ALTER TABLE $table DROP INDEX $name";
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}
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return $this->_db->query($query);
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}
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/**
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* alter an existing table
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*
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* @param string $name name of the table that is intended to be changed.
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* @param array $changes associative array that contains the details of each type
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* of change that is intended to be performed. The types of
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* changes that are currently supported are defined as follows:
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*
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* name
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*
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* New name for the table.
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*
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* add
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*
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* Associative array with the names of fields to be added as
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* indexes of the array. The value of each entry of the array
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* should be set to another associative array with the properties
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* of the fields to be added. The properties of the fields should
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* be the same as defined by the Metabase parser.
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*
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*
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* remove
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*
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* Associative array with the names of fields to be removed as indexes
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* of the array. Currently the values assigned to each entry are ignored.
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* An empty array should be used for future compatibility.
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*
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* rename
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*
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* Associative array with the names of fields to be renamed as indexes
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* of the array. The value of each entry of the array should be set to
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* another associative array with the entry named name with the new
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* field name and the entry named Declaration that is expected to contain
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* the portion of the field declaration already in DBMS specific SQL code
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* as it is used in the CREATE TABLE statement.
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*
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* change
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*
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* Associative array with the names of the fields to be changed as indexes
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* of the array. Keep in mind that if it is intended to change either the
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* name of a field and any other properties, the change array entries
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* should have the new names of the fields as array indexes.
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*
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* The value of each entry of the array should be set to another associative
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* array with the properties of the fields to that are meant to be changed as
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* array entries. These entries should be assigned to the new values of the
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* respective properties. The properties of the fields should be the same
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* as defined by the Metabase parser.
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*
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* Example
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* array(
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* 'name' => 'userlist',
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* 'add' => array(
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* 'quota' => array(
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* 'type' => 'integer',
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* 'unsigned' => 1
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* )
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* ),
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* 'remove' => array(
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* 'file_limit' => array(),
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* 'time_limit' => array()
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* ),
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* 'change' => array(
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* 'name' => array(
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* 'length' => '20',
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* 'definition' => array(
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* 'type' => 'text',
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* 'length' => 20,
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* ),
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* )
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* ),
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* 'rename' => array(
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* 'sex' => array(
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* 'name' => 'gender',
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* 'definition' => array(
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* 'type' => 'text',
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* 'length' => 1,
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* 'default' => 'M',
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* ),
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* )
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* )
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* )
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*
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* @param boolean $check (ignored in DB_Table)
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* @access public
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*
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* @return mixed DB_OK on success, a PEAR error on failure
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*/
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function alterTable($name, $changes, $check)
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{
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foreach ($changes as $change_name => $change) {
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switch ($change_name) {
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case 'add':
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case 'remove':
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case 'change':
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case 'rename':
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case 'name':
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break;
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default:
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return DB_Table::throwError(DB_TABLE_ERR_ALTER_TABLE_IMPOS);
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}
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}
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$query = '';
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if (array_key_exists('name', $changes)) {
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$change_name = $this->_db->quoteIdentifier($changes['name']);
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$query .= 'RENAME TO ' . $change_name;
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}
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if (array_key_exists('add', $changes)) {
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foreach ($changes['add'] as $field_name => $field) {
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if ($query) {
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$query.= ', ';
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}
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$query.= 'ADD ' . $field_name . ' ' . $field;
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}
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}
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if (array_key_exists('remove', $changes)) {
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foreach ($changes['remove'] as $field_name => $field) {
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if ($query) {
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$query.= ', ';
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}
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$field_name = $db->quoteIdentifier($field_name);
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$query.= 'DROP ' . $field_name;
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}
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}
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$rename = array();
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if (array_key_exists('rename', $changes)) {
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foreach ($changes['rename'] as $field_name => $field) {
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$rename[$field['name']] = $field_name;
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}
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}
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if (array_key_exists('change', $changes)) {
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foreach ($changes['change'] as $field_name => $field) {
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if ($query) {
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$query.= ', ';
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}
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if (isset($rename[$field_name])) {
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$old_field_name = $rename[$field_name];
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unset($rename[$field_name]);
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} else {
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$old_field_name = $field_name;
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}
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$old_field_name = $this->_db->quoteIdentifier($old_field_name);
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$query.= "CHANGE $old_field_name " . $field_name . ' ' . $field['definition'];
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}
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}
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if (!empty($rename)) {
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foreach ($rename as $rename_name => $renamed_field) {
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if ($query) {
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$query.= ', ';
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}
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$field = $changes['rename'][$renamed_field];
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$renamed_field = $this->_db->quoteIdentifier($renamed_field);
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$query.= 'CHANGE ' . $renamed_field . ' ' . $field['name'] . ' ' . $renamed_field['definition'];
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}
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}
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if (!$query) {
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return DB_OK;
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}
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$name = $this->_db->quoteIdentifier($name);
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return $this->_db->query("ALTER TABLE $name $query");
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}
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}
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?>
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