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376 lines
14 KiB
PHP
376 lines
14 KiB
PHP
<?php
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// +----------------------------------------------------------------------+
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// | PHP versions 4 and 5 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, |
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// | Stig. S. Bakken, Lukas Smith |
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// | All rights reserved. |
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// +----------------------------------------------------------------------+
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// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
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// | API as well as database abstraction for PHP applications. |
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// | This LICENSE is in the BSD license style. |
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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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// | |
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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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// | |
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// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
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// | Lukas Smith nor the names of his contributors may be used to endorse |
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// | or promote products derived from this software without specific prior|
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// | written permission. |
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// | |
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// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
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// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
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// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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// | POSSIBILITY OF SUCH DAMAGE. |
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// +----------------------------------------------------------------------+
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// | Author: Lukas Smith <smith@backendmedia.com> |
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// +----------------------------------------------------------------------+
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//
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// $Id$
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//
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require_once 'MDB2/Driver/Manager/Common.php';
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/**
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* MDB2 SQLite driver for the management modules
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*
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* @package MDB2
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* @category Database
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* @author Lukas Smith <smith@backendmedia.com>
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*/
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class MDB2_Driver_Manager_sqlite extends MDB2_Driver_Manager_Common
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{
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// {{{ createDatabase()
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/**
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* create a new database
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*
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* @param string $name name of the database that should be created
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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*/
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function createDatabase($name)
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{
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$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
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$database_file = $db->_getDatabaseFile($name);
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if (file_exists($database_file)) {
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return $db->raiseError(MDB2_ERROR_CANNOT_CREATE, null, null,
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'createDatabase: database already exists');
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}
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$php_errormsg = '';
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$handle = @sqlite_open($database_file, $db->dsn['mode'], $php_errormsg);
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if (!$handle) {
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return $db->raiseError(MDB2_ERROR_CANNOT_CREATE, null, null,
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'createDatabase: '.(isset($php_errormsg) ? $php_errormsg : 'could not create the database file'));
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}
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@sqlite_close($handle);
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return MDB2_OK;
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}
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// }}}
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// {{{ dropDatabase()
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/**
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* drop an existing database
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*
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* @param string $name name of the database that should be dropped
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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*/
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function dropDatabase($name)
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{
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$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
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$database_file = $db->_getDatabaseFile($name);
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if (!@file_exists($database_file)) {
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return $db->raiseError(MDB2_ERROR_CANNOT_DROP, null, null,
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'dropDatabase: database does not exist');
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}
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$result = @unlink($database_file);
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if (!$result) {
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return $db->raiseError(MDB2_ERROR_CANNOT_DROP, null, null,
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'dropDatabase: '.(isset($php_errormsg) ? $php_errormsg : 'could not remove the database file'));
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}
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return MDB2_OK;
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}
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// }}}
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// {{{ listDatabases()
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/**
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* list all databases
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*
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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*/
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function listDatabases()
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{
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$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
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return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
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'listDatabases: list databases is not supported');
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}
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// }}}
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// {{{ listUsers()
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/**
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* list all users
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*
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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*/
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function listUsers()
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{
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$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
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return $db->queryCol('SELECT DISTINCT USER FROM USER');
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}
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// }}}
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// {{{ listTables()
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/**
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* list all tables in the current database
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*
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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*/
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function listTables()
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{
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$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
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$query = "SELECT name FROM sqlite_master WHERE type='table' AND sql NOT NULL ORDER BY name";
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$table_names = $db->queryCol($query);
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if (PEAR::isError($table_names)) {
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return $table_names;
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}
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$tables = array();
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for ($i = 0, $j = count($table_names); $i < $j; ++$i) {
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if (!$this->_isSequenceName($table_names[$i]))
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$tables[] = $table_names[$i];
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}
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return $tables;
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}
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// }}}
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// {{{ listTableFields()
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/**
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* list all fields in a tables in the current database
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*
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* @param string $table name of table that should be used in method
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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*/
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function listTableFields($table)
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{
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$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
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$query = "SELECT * FROM $table";
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$db->setLimit(1);
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$result = $db->query($query);
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if (PEAR::isError($result)) {
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return $result;
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}
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$columns = $result->getColumnNames();
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$result->free();
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if (PEAR::isError($columns)) {
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return $columns;
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}
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return array_flip($columns);
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}
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// }}}
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// {{{ createIndex()
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/**
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* get the stucture of a field into an array
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*
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* @param string $table name of the table on which the index is to be created
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* @param string $name name of the index to be created
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* @param array $definition associative array that defines properties of the index to be created.
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* Currently, only one property named FIELDS is supported. This property
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* is also an associative with the names of the index fields as array
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* indexes. Each entry of this array is set to another type of associative
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* array that specifies properties of the index that are specific to
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* each field.
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*
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* Currently, only the sorting property is supported. It should be used
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* to define the sorting direction of the index. It may be set to either
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* ascending or descending.
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*
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* Not all DBMS support index sorting direction configuration. The DBMS
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* drivers of those that do not support it ignore this property. Use the
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* function support() to determine whether the DBMS driver can manage indexes.
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* Example
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* array(
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* 'fields' => array(
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* 'user_name' => array(
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* 'sorting' => 'ascending'
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* ),
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* 'last_login' => array()
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* )
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* )
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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*/
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function createIndex($table, $name, $definition)
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{
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$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
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$query = 'CREATE '.(isset($definition['unique']) ? 'UNIQUE' : '')." INDEX $name ON $table (";
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$skipped_first = false;
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foreach ($definition['fields'] as $field_name => $field) {
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if ($skipped_first) {
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$query .= ',';
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}
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$query .= $field_name;
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$skipped_first = true;
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}
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$query .= ')';
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return $db->query($query);
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}
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// }}}
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// {{{ dropIndex()
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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 $name name of the index to be dropped
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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*/
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function dropIndex($table, $name)
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{
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$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
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return $db->query("DROP INDEX $name");
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}
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// }}}
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// {{{ listTableIndexes()
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/**
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* list all indexes in a table
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*
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* @param string $table name of table that should be used in method
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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*/
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function listTableIndexes($table)
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{
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$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
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$query = "SELECT name FROM sqlite_master WHERE type='index' AND tbl_name='$table' AND sql NOT NULL ORDER BY name";
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$indexes_all = $db->queryCol($query);
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if (PEAR::isError($indexes_all)) {
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return $indexes_all;
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}
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$found = $indexes = array();
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foreach ($indexes_all as $index => $index_name) {
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if ($indexes_all[$index] != 'PRIMARY' && !isset($found[$index_name])) {
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$indexes[] = $index_name;
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$found[$index_name] = true;
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}
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}
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return $indexes;
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}
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// }}}
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// {{{ createSequence()
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/**
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* create sequence
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*
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* @param string $seq_name name of the sequence to be created
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* @param string $start start value of the sequence; default is 1
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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*/
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function createSequence($seq_name, $start = 1)
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{
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$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
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$sequence_name = $db->getSequenceName($seq_name);
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$seqcol_name = $db->options['seqcol_name'];
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$query = "CREATE TABLE $sequence_name ($seqcol_name INTEGER PRIMARY KEY DEFAULT 0 NOT NULL)";
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$res = $db->query($query);
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if (PEAR::isError($res)) {
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return $res;
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}
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if ($start == 1) {
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return MDB2_OK;
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}
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$res = $db->query("INSERT INTO $sequence_name ($seqcol_name) VALUES (".($start-1).')');
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if (!PEAR::isError($res)) {
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return MDB2_OK;
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}
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// Handle error
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$result = $db->query("DROP TABLE $sequence_name");
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if (PEAR::isError($result)) {
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return $db->raiseError(MDB2_ERROR, null, null,
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'createSequence: could not drop inconsistent sequence table ('.
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$result->getMessage().' ('.$result->getUserinfo().'))');
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}
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return $db->raiseError(MDB2_ERROR, null, null,
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'createSequence: could not create sequence table ('.
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$res->getMessage().' ('.$res->getUserinfo().'))');
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}
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// }}}
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// {{{ dropSequence()
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/**
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* drop existing sequence
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*
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* @param string $seq_name name of the sequence to be dropped
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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*/
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function dropSequence($seq_name)
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{
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$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
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$sequence_name = $db->getSequenceName($seq_name);
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return $db->query("DROP TABLE $sequence_name");
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}
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// }}}
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// {{{ listSequences()
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/**
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* list all sequences in the current database
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*
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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*/
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function listSequences()
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{
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$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
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$query = "SELECT name FROM sqlite_master WHERE type='table' AND sql NOT NULL ORDER BY name";
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$table_names = $db->queryCol($query);
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if (PEAR::isError($table_names)) {
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return $table_names;
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}
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$sequences = array();
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for ($i = 0, $j = count($table_names); $i < $j; ++$i) {
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if ($sqn = $this->_isSequenceName($table_names[$i]))
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$sequences[] = $sqn;
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}
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return $sequences;
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}
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// }}}
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}
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?>
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