<?php
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// vim: set et ts=4 sw=4 fdm=marker:
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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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/**
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* MDB2 SQLite driver
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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_sqlite extends MDB2_Driver_Common
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{
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// {{{ properties
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var $escape_quotes = "'";
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var $_lasterror = '';
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// }}}
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// {{{ constructor
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/**
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* Constructor
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*/
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function __construct()
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{
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parent::__construct();
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$this->phptype = 'sqlite';
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$this->dbsyntax = 'sqlite';
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$this->supported['sequences'] = true;
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$this->supported['indexes'] = true;
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$this->supported['affected_rows'] = true;
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$this->supported['summary_functions'] = true;
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$this->supported['order_by_text'] = true;
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$this->supported['current_id'] = true;
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$this->supported['limit_queries'] = true;
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$this->supported['LOBs'] = true;
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$this->supported['replace'] = true;
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$this->supported['transactions'] = true;
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$this->supported['sub_selects'] = true;
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$this->supported['auto_increment'] = true;
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$this->options['base_transaction_name'] = '___php_MDB2_sqlite_auto_commit_off';
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$this->options['fixed_float'] = 0;
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$this->options['database_path'] = '';
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$this->options['database_extension'] = '';
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}
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// }}}
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// {{{ errorInfo()
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/**
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* This method is used to collect information about an error
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*
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* @param integer $error
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* @return array
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* @access public
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*/
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function errorInfo($error = null)
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{
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$native_code = null;
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if ($this->connection) {
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$native_code = @sqlite_last_error($this->connection);
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}
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$native_msg = @sqlite_error_string($native_code);
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if (is_null($error)) {
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static $error_regexps;
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if (empty($error_regexps)) {
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$error_regexps = array(
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'/^no such table:/' => MDB2_ERROR_NOSUCHTABLE,
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'/^no such index:/' => MDB2_ERROR_NOT_FOUND,
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'/^(table|index) .* already exists$/' => MDB2_ERROR_ALREADY_EXISTS,
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'/PRIMARY KEY must be unique/i' => MDB2_ERROR_CONSTRAINT,
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'/is not unique/' => MDB2_ERROR_CONSTRAINT,
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'/columns .* are not unique/i' => MDB2_ERROR_CONSTRAINT,
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'/uniqueness constraint failed/' => MDB2_ERROR_CONSTRAINT,
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'/may not be NULL/' => MDB2_ERROR_CONSTRAINT_NOT_NULL,
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'/^no such column:/' => MDB2_ERROR_NOSUCHFIELD,
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'/column not present in both tables/i' => MDB2_ERROR_NOSUCHFIELD,
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'/^near ".*": syntax error$/' => MDB2_ERROR_SYNTAX,
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'/[0-9]+ values for [0-9]+ columns/i' => MDB2_ERROR_VALUE_COUNT_ON_ROW,
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);
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}
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foreach ($error_regexps as $regexp => $code) {
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if (preg_match($regexp, $this->_lasterror)) {
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$error = $code;
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break;
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}
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}
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}
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return array($error, $native_code, $native_msg);
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}
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// }}}
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// {{{ escape()
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/**
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* Quotes a string so it can be safely used in a query. It will quote
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* the text so it can safely be used within a query.
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*
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* @param string $text the input string to quote
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* @return string quoted string
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* @access public
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*/
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function escape($text)
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{
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return @sqlite_escape_string($text);
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}
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// }}}
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// {{{ beginTransaction()
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/**
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* Start a transaction.
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*
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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*/
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function beginTransaction()
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{
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$this->debug('starting transaction', 'beginTransaction');
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if ($this->in_transaction) {
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return MDB2_OK; //nothing to do
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}
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if (!$this->destructor_registered && $this->opened_persistent) {
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$this->destructor_registered = true;
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register_shutdown_function('MDB2_closeOpenTransactions');
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}
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$query = 'BEGIN TRANSACTION '.$this->options['base_transaction_name'];
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$result = $this->_doQuery($query, true);
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if (PEAR::isError($result)) {
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return $result;
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}
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$this->in_transaction = true;
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return MDB2_OK;
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}
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// }}}
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// {{{ commit()
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/**
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* Commit the database changes done during a transaction that is in
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* progress.
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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 commit()
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{
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$this->debug('commit transaction', 'commit');
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if (!$this->in_transaction) {
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return $this->raiseError(MDB2_ERROR, null, null,
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'commit: transaction changes are being auto committed');
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}
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$query = 'COMMIT TRANSACTION '.$this->options['base_transaction_name'];
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$result = $this->_doQuery($query, true);
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if (PEAR::isError($result)) {
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return $result;
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}
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$this->in_transaction = false;
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return MDB2_OK;
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}
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// }}}
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// {{{ rollback()
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/**
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* Cancel any database changes done during a transaction that is in
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* progress.
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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 rollback()
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{
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$this->debug('rolling back transaction', 'rollback');
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if (!$this->in_transaction) {
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return $this->raiseError(MDB2_ERROR, null, null,
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'rollback: transactions can not be rolled back when changes are auto committed');
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}
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$query = 'ROLLBACK TRANSACTION '.$this->options['base_transaction_name'];
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$result = $this->_doQuery($query, true);
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if (PEAR::isError($result)) {
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return $result;
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}
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$this->in_transaction = false;
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return MDB2_OK;
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}
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// }}}
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// {{{ getDatabaseFile()
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/**
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* Builds the string with path+dbname+extension
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*
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* @return string full database path+file
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* @access protected
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*/
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function _getDatabaseFile($database_name)
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{
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if ($database_name == '') {
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return $database_name;
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}
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return $this->options['database_path'].$database_name.$this->options['database_extension'];
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}
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// }}}
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// {{{ connect()
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/**
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* Connect to the database
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*
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* @return true on success, MDB2 Error Object on failure
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**/
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function connect()
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{
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$database_file = $this->_getDatabaseFile($this->database_name);
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if (is_resource($this->connection)) {
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if (count(array_diff($this->connected_dsn, $this->dsn)) == 0
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&& $this->connected_database_name == $database_file
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&& $this->opened_persistent == $this->options['persistent']
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) {
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return MDB2_OK;
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}
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$this->disconnect(false);
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}
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if (!PEAR::loadExtension($this->phptype)) {
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return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
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'connect: extension '.$this->phptype.' is not compiled into PHP');
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}
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if (!empty($this->database_name)) {
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if (!file_exists($database_file)) {
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if (!touch($database_file)) {
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return $this->raiseError(MDB2_ERROR_NOT_FOUND);
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}
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if (!isset($this->dsn['mode'])
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|| !is_numeric($this->dsn['mode'])
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) {
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$mode = 0644;
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} else {
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$mode = octdec($this->dsn['mode']);
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}
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if (!chmod($database_file, $mode)) {
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return $this->raiseError(MDB2_ERROR_NOT_FOUND);
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}
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if (!file_exists($database_file)) {
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return $this->raiseError(MDB2_ERROR_NOT_FOUND);
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}
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}
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if (!is_file($database_file)) {
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return $this->raiseError(MDB2_ERROR_INVALID);
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}
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if (!is_readable($database_file)) {
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return $this->raiseError(MDB2_ERROR_ACCESS_VIOLATION);
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}
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$connect_function = ($this->options['persistent'] ? 'sqlite_popen' : 'sqlite_open');
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$php_errormsg = '';
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@ini_set('track_errors', true);
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$connection = @$connect_function($database_file);
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@ini_restore('track_errors');
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$this->_lasterror = isset($php_errormsg) ? $php_errormsg : '';
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if (!$connection) {
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return $this->raiseError(MDB2_ERROR_CONNECT_FAILED);
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}
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$this->connection = $connection;
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$this->connected_dsn = $this->dsn;
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$this->connected_database_name = $database_file;
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$this->opened_persistent = $this->getoption('persistent');
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$this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
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}
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return MDB2_OK;
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}
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// }}}
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// {{{ disconnect()
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/**
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* Log out and disconnect from the database.
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*
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* @return mixed true on success, false if not connected and error
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* object on error
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* @access public
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*/
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function disconnect($force = true)
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{
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if (is_resource($this->connection)) {
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if (!$this->opened_persistent || $force) {
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@sqlite_close($this->connection);
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}
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$this->connection = 0;
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}
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return MDB2_OK;
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}
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// }}}
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// {{{ _doQuery()
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/**
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* Execute a query
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* @param string $query query
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* @param boolean $isManip if the query is a manipulation query
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* @param resource $connection
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* @param string $database_name
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* @return result or error object
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* @access protected
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*/
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function _doQuery($query, $isManip = false, $connection = null, $database_name = null)
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{
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$this->last_query = $query;
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$this->debug($query, 'query');
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if ($this->options['disable_query']) {
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if ($isManip) {
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return MDB2_OK;
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}
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return null;
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}
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if (is_null($connection)) {
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$error = $this->connect();
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if (PEAR::isError($error)) {
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return $error;
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}
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$connection = $this->connection;
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}
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$function = $this->options['result_buffering']
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? 'sqlite_query' : 'sqlite_unbuffered_query';
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$php_errormsg = '';
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ini_set('track_errors', true);
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$result = @$function($query.';', $connection);
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ini_restore('track_errors');
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$this->_lasterror = isset($php_errormsg) ? $php_errormsg : '';
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if (!$result) {
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return $this->raiseError();
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}
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if ($isManip) {
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return @sqlite_changes($connection);
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}
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return $result;
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}
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// }}}
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// {{{ _modifyQuery()
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/**
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* Changes a query string for various DBMS specific reasons
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*
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* @param string $query query to modify
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* @return the new (modified) query
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* @access protected
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*/
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function _modifyQuery($query, $isManip, $limit, $offset)
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{
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if ($this->options['portability'] & MDB2_PORTABILITY_DELETE_COUNT) {
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if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {
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$query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/',
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'DELETE FROM \1 WHERE 1=1', $query);
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}
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}
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if ($limit > 0
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&& !preg_match('/LIMIT\s*\d(\s*(,|OFFSET)\s*\d+)?/i', $query)
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) {
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$query = rtrim($query);
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if (substr($query, -1) == ';') {
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$query = substr($query, 0, -1);
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}
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if ($isManip) {
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$query .= " LIMIT $limit";
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} else {
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$query .= " LIMIT $offset,$limit";
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}
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}
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return $query;
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}
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// }}}
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// {{{ replace()
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/**
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* Execute a SQL REPLACE query. A REPLACE query is identical to a INSERT
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* query, except that if there is already a row in the table with the same
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* key field values, the REPLACE query just updates its values instead of
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* inserting a new row.
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*
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* The REPLACE type of query does not make part of the SQL standards. Since
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* practically only SQLite implements it natively, this type of query is
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* emulated through this method for other DBMS using standard types of
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* queries inside a transaction to assure the atomicity of the operation.
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*
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* @access public
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*
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* @param string $table name of the table on which the REPLACE query will
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* be executed.
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* @param array $fields associative array that describes the fields and the
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* values that will be inserted or updated in the specified table. The
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* indexes of the array are the names of all the fields of the table. The
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* values of the array are also associative arrays that describe the
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* values and other properties of the table fields.
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*
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* Here follows a list of field properties that need to be specified:
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*
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* value:
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* Value to be assigned to the specified field. This value may be
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* of specified in database independent type format as this
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* function can perform the necessary datatype conversions.
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*
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* Default:
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* this property is required unless the Null property
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* is set to 1.
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*
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* type
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* Name of the type of the field. Currently, all types Metabase
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* are supported except for clob and blob.
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*
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* Default: no type conversion
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*
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* null
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* Boolean property that indicates that the value for this field
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* should be set to null.
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*
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* The default value for fields missing in INSERT queries may be
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* specified the definition of a table. Often, the default value
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* is already null, but since the REPLACE may be emulated using
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* an UPDATE query, make sure that all fields of the table are
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* listed in this function argument array.
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*
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* Default: 0
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*
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* key
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* Boolean property that indicates that this field should be
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* handled as a primary key or at least as part of the compound
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* unique index of the table that will determine the row that will
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* updated if it exists or inserted a new row otherwise.
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*
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* This function will fail if no key field is specified or if the
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* value of a key field is set to null because fields that are
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* part of unique index they may not be null.
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*
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* Default: 0
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*
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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*/
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function replace($table, $fields)
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{
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$count = count($fields);
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$query = $values = '';
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$keys = $colnum = 0;
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for (reset($fields); $colnum < $count; next($fields), $colnum++) {
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$name = key($fields);
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if ($colnum > 0) {
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$query .= ',';
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$values .= ',';
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}
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$query .= $name;
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if (isset($fields[$name]['null']) && $fields[$name]['null']) {
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$value = 'NULL';
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} else {
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$value = $this->quote($fields[$name]['value'], $fields[$name]['type']);
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}
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$values .= $value;
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if (isset($fields[$name]['key']) && $fields[$name]['key']) {
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if ($value === 'NULL') {
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return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
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'replace: key value '.$name.' may not be NULL');
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}
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$keys++;
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}
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}
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if ($keys == 0) {
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return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
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'replace: not specified which fields are keys');
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}
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$query = "REPLACE INTO $table ($query) VALUES ($values)";
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$this->last_query = $query;
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$this->debug($query, 'query');
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return $this->_doQuery($query, true);
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}
|
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// }}}
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// {{{ nextID()
|
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/**
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* returns the next free id of a sequence
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*
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* @param string $seq_name name of the sequence
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* @param boolean $ondemand when true the seqence is
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* automatic created, if it
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* not exists
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*
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* @return mixed MDB2 Error Object or id
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* @access public
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*/
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function nextID($seq_name, $ondemand = true)
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{
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$sequence_name = $this->getSequenceName($seq_name);
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$query = "INSERT INTO $sequence_name (".$this->options['seqcol_name'].") VALUES (NULL)";
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$this->expectError(MDB2_ERROR_NOSUCHTABLE);
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$result = $this->_doQuery($query, true);
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$this->popExpect();
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if (PEAR::isError($result)) {
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if ($ondemand && $result->getCode() == MDB2_ERROR_NOSUCHTABLE) {
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$this->loadModule('Manager');
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// Since we are creating the sequence on demand
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// we know the first id = 1 so initialize the
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// sequence at 2
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$result = $this->manager->createSequence($seq_name, 2);
|
if (PEAR::isError($result)) {
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return $this->raiseError(MDB2_ERROR, null, null,
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'nextID: on demand sequence '.$seq_name.' could not be created');
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} else {
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// First ID of a newly created sequence is 1
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return 1;
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}
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}
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return $result;
|
}
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$value = @sqlite_last_insert_rowid($this->connection);
|
if (is_numeric($value)
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&& PEAR::isError($this->_doQuery("DELETE FROM $sequence_name WHERE ".$this->options['seqcol_name']." < $value", true))
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) {
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$this->warnings[] = 'nextID: could not delete previous sequence table values from '.$seq_name;
|
}
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return $value;
|
}
|
|
// }}}
|
// {{{ getAfterID()
|
|
/**
|
* returns the autoincrement ID if supported or $id
|
*
|
* @param mixed $id value as returned by getBeforeId()
|
* @param string $table name of the table into which a new row was inserted
|
* @return mixed MDB2 Error Object or id
|
* @access public
|
*/
|
function getAfterID($id, $table)
|
{
|
$this->loadModule('Native');
|
return $this->native->getInsertID();
|
}
|
|
// }}}
|
// {{{ currID()
|
|
/**
|
* returns the current id of a sequence
|
*
|
* @param string $seq_name name of the sequence
|
* @return mixed MDB2 Error Object or id
|
* @access public
|
*/
|
function currID($seq_name)
|
{
|
$sequence_name = $this->getSequenceName($seq_name);
|
return $this->queryOne("SELECT MAX(".$this->options['seqcol_name'].") FROM $sequence_name", 'integer');
|
}
|
}
|
|
class MDB2_Result_sqlite extends MDB2_Result_Common
|
{
|
// }}}
|
// {{{ fetchRow()
|
|
/**
|
* Fetch a row and insert the data into an existing array.
|
*
|
* @param int $fetchmode how the array data should be indexed
|
* @param int $rownum number of the row where the data can be found
|
* @return int data array on success, a MDB2 error on failure
|
* @access public
|
*/
|
function &fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
|
{
|
if (!is_null($rownum)) {
|
$seek = $this->seek($rownum);
|
if (PEAR::isError($seek)) {
|
return $seek;
|
}
|
}
|
if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
|
$fetchmode = $this->db->fetchmode;
|
}
|
if ($fetchmode & MDB2_FETCHMODE_ASSOC) {
|
$row = @sqlite_fetch_array($this->result, SQLITE_ASSOC);
|
if (is_array($row)
|
&& $this->db->options['portability'] & MDB2_PORTABILITY_LOWERCASE
|
) {
|
$row = array_change_key_case($row, CASE_LOWER);
|
}
|
} else {
|
$row = @sqlite_fetch_array($this->result, SQLITE_NUM);
|
}
|
if (!$row) {
|
if (is_null($this->result)) {
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
'fetchRow: resultset has already been freed');
|
}
|
return null;
|
}
|
if ($this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL) {
|
$this->db->_convertEmptyArrayValuesToNull($row);
|
}
|
if (isset($this->values)) {
|
$this->_assignBindColumns($row);
|
}
|
if (isset($this->types)) {
|
$row = $this->db->datatype->convertResultRow($this->types, $row);
|
}
|
if ($fetchmode === MDB2_FETCHMODE_OBJECT) {
|
$object_class = $this->db->options['fetch_class'];
|
if ($object_class == 'stdClass') {
|
$row = (object) $row;
|
} else {
|
$row = &new $object_class($row);
|
}
|
}
|
++$this->rownum;
|
return $row;
|
}
|
|
// }}}
|
// {{{ _getColumnNames()
|
|
/**
|
* Retrieve the names of columns returned by the DBMS in a query result.
|
*
|
* @return mixed an associative array variable
|
* that will hold the names of columns. The
|
* indexes of the array are the column names
|
* mapped to lower case and the values are the
|
* respective numbers of the columns starting
|
* from 0. Some DBMS may not return any
|
* columns when the result set does not
|
* contain any rows.
|
*
|
* a MDB2 error on failure
|
* @access private
|
*/
|
function _getColumnNames()
|
{
|
$columns = array();
|
$numcols = $this->numCols();
|
if (PEAR::isError($numcols)) {
|
return $numcols;
|
}
|
for ($column = 0; $column < $numcols; $column++) {
|
$column_name = @sqlite_field_name($this->result, $column);
|
$columns[$column_name] = $column;
|
}
|
if ($this->db->options['portability'] & MDB2_PORTABILITY_LOWERCASE) {
|
$columns = array_change_key_case($columns, CASE_LOWER);
|
}
|
return $columns;
|
}
|
|
// }}}
|
// {{{ numCols()
|
|
/**
|
* Count the number of columns returned by the DBMS in a query result.
|
*
|
* @access public
|
* @return mixed integer value with the number of columns, a MDB2 error
|
* on failure
|
*/
|
function numCols()
|
{
|
$cols = @sqlite_num_fields($this->result);
|
if (is_null($cols)) {
|
if (is_null($this->result)) {
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
'numCols: resultset has already been freed');
|
}
|
return $this->db->raiseError();
|
}
|
return $cols;
|
}
|
}
|
|
class MDB2_BufferedResult_sqlite extends MDB2_Result_sqlite
|
{
|
// {{{ seek()
|
|
/**
|
* seek to a specific row in a result set
|
*
|
* @param int $rownum number of the row where the data can be found
|
* @return mixed MDB2_OK on success, a MDB2 error on failure
|
* @access public
|
*/
|
function seek($rownum = 0)
|
{
|
if (!@sqlite_seek($this->result, $rownum)) {
|
if (is_null($this->result)) {
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
'seek: resultset has already been freed');
|
}
|
return $this->db->raiseError(MDB2_ERROR_INVALID, null, null,
|
'seek: tried to seek to an invalid row number ('.$rownum.')');
|
}
|
$this->rownum = $rownum - 1;
|
return MDB2_OK;
|
}
|
|
// }}}
|
// {{{ valid()
|
|
/**
|
* check if the end of the result set has been reached
|
*
|
* @return mixed true or false on sucess, a MDB2 error on failure
|
* @access public
|
*/
|
function valid()
|
{
|
$numrows = $this->numRows();
|
if (PEAR::isError($numrows)) {
|
return $numrows;
|
}
|
return $this->rownum < ($numrows - 1);
|
}
|
|
// }}}
|
// {{{ numRows()
|
|
/**
|
* returns the number of rows in a result object
|
*
|
* @return mixed MDB2 Error Object or the number of rows
|
* @access public
|
*/
|
function numRows()
|
{
|
$rows = @sqlite_num_rows($this->result);
|
if (is_null($rows)) {
|
if (is_null($this->result)) {
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
'numRows: resultset has already been freed');
|
}
|
return $this->raiseError();
|
}
|
return $rows;
|
}
|
}
|
|
class MDB2_Statement_sqlite extends MDB2_Statement_Common
|
{
|
|
}
|
|
?>
|
