696 lines
22 KiB
PHP
696 lines
22 KiB
PHP
<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 foldmethod=marker: */
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// +----------------------------------------------------------------------+
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// | PHP Version 4 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2004 The PHP Group |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 2.02 of the PHP license, |
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// | that is bundled with this package in the file LICENSE, and is |
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// | available at through the world-wide-web at |
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// | http://www.php.net/license/2_02.txt. |
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// | If you did not receive a copy of the PHP license and are unable to |
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// | obtain it through the world-wide-web, please send a note to |
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// | license@php.net so we can mail you a copy immediately. |
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// +----------------------------------------------------------------------+
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// | Authors: Urs Gehrig <urs@circle.ch> |
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// | Mika Tuupola <tuupola@appelsiini.net> |
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// | Maintainer: Daniel Convissor <danielc@php.net> |
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// +----------------------------------------------------------------------+
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//
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// $Id: sqlite.php 3355 2005-06-11 22:14:40Z nbm $
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require_once 'DB/common.php';
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/**
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* Database independent query interface definition for the SQLite
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* PECL extension.
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*
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* @package DB
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* @version $Id: sqlite.php 3355 2005-06-11 22:14:40Z nbm $
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* @category Database
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* @author Urs Gehrig <urs@circle.ch>
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* @author Mika Tuupola <tuupola@appelsiini.net>
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*/
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class DB_sqlite extends DB_common
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{
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// {{{ properties
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var $connection;
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var $phptype, $dbsyntax;
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var $prepare_tokens = array();
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var $prepare_types = array();
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var $_lasterror = '';
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// }}}
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// {{{ constructor
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/**
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* Constructor for this class.
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*
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* Error codes according to sqlite_exec. Error Codes specification is
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* in the {@link http://sqlite.org/c_interface.html online manual}.
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*
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* This errorhandling based on sqlite_exec is not yet implemented.
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*
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* @access public
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*/
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function DB_sqlite()
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{
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$this->DB_common();
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$this->phptype = 'sqlite';
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$this->dbsyntax = 'sqlite';
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$this->features = array (
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'prepare' => false,
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'pconnect' => true,
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'transactions' => false,
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'limit' => 'alter'
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);
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// SQLite data types, http://www.sqlite.org/datatypes.html
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$this->keywords = array (
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'BLOB' => '',
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'BOOLEAN' => '',
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'CHARACTER' => '',
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'CLOB' => '',
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'FLOAT' => '',
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'INTEGER' => '',
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'KEY' => '',
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'NATIONAL' => '',
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'NUMERIC' => '',
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'NVARCHAR' => '',
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'PRIMARY' => '',
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'TEXT' => '',
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'TIMESTAMP' => '',
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'UNIQUE' => '',
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'VARCHAR' => '',
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'VARYING' => ''
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);
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$this->errorcode_map = array(
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);
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}
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// }}}
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// {{{ connect()
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/**
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* Connect to a database represented by a file.
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*
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* @param $dsn the data source name; the file is taken as
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* database; "sqlite://root:@host/test.db?mode=0644"
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* @param $persistent (optional) whether the connection should
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* be persistent
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* @access public
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* @return int DB_OK on success, a DB error on failure
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*/
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function connect($dsninfo, $persistent = false)
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{
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if (!DB::assertExtension('sqlite')) {
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return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
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}
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$this->dsn = $dsninfo;
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if ($dsninfo['database']) {
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if (!file_exists($dsninfo['database'])) {
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if (!touch($dsninfo['database'])) {
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return $this->sqliteRaiseError(DB_ERROR_NOT_FOUND);
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}
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if (!isset($dsninfo['mode']) ||
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!is_numeric($dsninfo['mode']))
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{
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$mode = 0644;
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} else {
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$mode = octdec($dsninfo['mode']);
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}
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if (!chmod($dsninfo['database'], $mode)) {
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return $this->sqliteRaiseError(DB_ERROR_NOT_FOUND);
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}
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if (!file_exists($dsninfo['database'])) {
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return $this->sqliteRaiseError(DB_ERROR_NOT_FOUND);
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}
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}
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if (!is_file($dsninfo['database'])) {
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return $this->sqliteRaiseError(DB_ERROR_INVALID);
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}
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if (!is_readable($dsninfo['database'])) {
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return $this->sqliteRaiseError(DB_ERROR_ACCESS_VIOLATION);
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}
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} else {
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return $this->sqliteRaiseError(DB_ERROR_ACCESS_VIOLATION);
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}
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$connect_function = $persistent ? 'sqlite_popen' : 'sqlite_open';
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if (!($conn = @$connect_function($dsninfo['database']))) {
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return $this->sqliteRaiseError(DB_ERROR_NODBSELECTED);
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}
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$this->connection = $conn;
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return DB_OK;
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}
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// }}}
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// {{{ disconnect()
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/**
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* Log out and disconnect from the database.
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*
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* @access public
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* @return bool true on success, false if not connected.
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* @todo fix return values
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*/
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function disconnect()
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{
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$ret = @sqlite_close($this->connection);
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$this->connection = null;
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return $ret;
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}
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// }}}
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// {{{ simpleQuery()
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/**
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* Send a query to SQLite and returns the results as a SQLite resource
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* identifier.
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*
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* @param the SQL query
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* @access public
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* @return mixed returns a valid SQLite result for successful SELECT
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* queries, DB_OK for other successful queries. A DB error is
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* returned on failure.
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*/
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function simpleQuery($query)
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{
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$ismanip = DB::isManip($query);
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$this->last_query = $query;
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$query = $this->_modifyQuery($query);
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ini_set('track_errors', true);
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$result = @sqlite_query($query, $this->connection);
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ini_restore('track_errors');
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$this->_lasterror = isset($php_errormsg) ? $php_errormsg : '';
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$this->result = $result;
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if (!$this->result) {
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return $this->sqliteRaiseError(null);
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}
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/* sqlite_query() seems to allways return a resource */
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/* so cant use that. Using $ismanip instead */
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if (!$ismanip) {
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$numRows = $this->numRows($result);
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/* if numRows() returned PEAR_Error */
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if (is_object($numRows)) {
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return $numRows;
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}
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return $result;
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}
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return DB_OK;
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}
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// }}}
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// {{{ nextResult()
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/**
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* Move the internal sqlite result pointer to the next available result.
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*
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* @param a valid sqlite result resource
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* @access public
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* @return true if a result is available otherwise return false
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*/
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function nextResult($result)
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{
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return false;
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}
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// }}}
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// {{{ fetchInto()
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/**
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* Fetch a row and insert the data into an existing array.
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*
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* Formating of the array and the data therein are configurable.
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* See DB_result::fetchInto() for more information.
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*
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* @param resource $result query result identifier
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* @param array $arr (reference) array where data from the row
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* should be placed
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* @param int $fetchmode how the resulting array should be indexed
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* @param int $rownum the row number to fetch
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*
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* @return mixed DB_OK on success, null when end of result set is
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* reached or on failure
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*
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* @see DB_result::fetchInto()
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* @access private
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*/
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function fetchInto($result, &$arr, $fetchmode, $rownum=null)
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{
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if ($rownum !== null) {
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if (!@sqlite_seek($this->result, $rownum)) {
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return null;
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}
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}
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if ($fetchmode & DB_FETCHMODE_ASSOC) {
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$arr = @sqlite_fetch_array($result, SQLITE_ASSOC);
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if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) {
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$arr = array_change_key_case($arr, CASE_LOWER);
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}
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} else {
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$arr = @sqlite_fetch_array($result, SQLITE_NUM);
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}
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if (!$arr) {
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/* See: http://bugs.php.net/bug.php?id=22328 */
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return null;
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}
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if ($this->options['portability'] & DB_PORTABILITY_RTRIM) {
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/*
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* Even though this DBMS already trims output, we do this because
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* a field might have intentional whitespace at the end that
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* gets removed by DB_PORTABILITY_RTRIM under another driver.
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*/
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$this->_rtrimArrayValues($arr);
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}
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if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) {
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$this->_convertNullArrayValuesToEmpty($arr);
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}
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return DB_OK;
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}
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// }}}
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// {{{ freeResult()
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/**
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* Free the internal resources associated with $result.
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*
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* @param $result SQLite result identifier
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* @access public
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* @return bool true on success, false if $result is invalid
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*/
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function freeResult(&$result)
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{
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// XXX No native free?
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if (!is_resource($result)) {
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return false;
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}
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$result = null;
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return true;
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}
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// }}}
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// {{{ numCols()
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/**
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* Gets the number of columns in a result set.
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*
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* @return number of columns in a result set
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*/
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function numCols($result)
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{
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$cols = @sqlite_num_fields($result);
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if (!$cols) {
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return $this->sqliteRaiseError();
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}
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return $cols;
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}
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// }}}
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// {{{ numRows()
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/**
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* Gets the number of rows affected by a query.
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*
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* @return number of rows affected by the last query
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*/
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function numRows($result)
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{
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$rows = @sqlite_num_rows($result);
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if (!is_integer($rows)) {
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return $this->raiseError();
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}
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return $rows;
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}
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// }}}
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// {{{ affected()
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/**
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* Gets the number of rows affected by a query.
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*
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* @return number of rows affected by the last query
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*/
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function affectedRows()
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{
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return @sqlite_changes($this->connection);
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}
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// }}}
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// {{{ errorNative()
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/**
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* Get the native error string of the last error (if any) that
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* occured on the current connection.
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*
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* This is used to retrieve more meaningfull error messages DB_pgsql
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* way since sqlite_last_error() does not provide adequate info.
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*
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* @return string native SQLite error message
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*/
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function errorNative()
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{
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return($this->_lasterror);
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}
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// }}}
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// {{{ errorCode()
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/**
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* Determine PEAR::DB error code from the database's text error message.
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*
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* @param string $errormsg error message returned from the database
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* @return integer an error number from a DB error constant
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*/
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function errorCode($errormsg)
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{
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static $error_regexps;
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if (!isset($error_regexps)) {
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$error_regexps = array(
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'/^no such table:/' => DB_ERROR_NOSUCHTABLE,
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'/^table .* already exists$/' => DB_ERROR_ALREADY_EXISTS,
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'/PRIMARY KEY must be unique/i' => DB_ERROR_CONSTRAINT,
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'/is not unique/' => DB_ERROR_CONSTRAINT,
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'/uniqueness constraint failed/' => DB_ERROR_CONSTRAINT,
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'/may not be NULL/' => DB_ERROR_CONSTRAINT_NOT_NULL,
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'/^no such column:/' => DB_ERROR_NOSUCHFIELD,
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'/^near ".*": syntax error$/' => DB_ERROR_SYNTAX
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);
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}
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foreach ($error_regexps as $regexp => $code) {
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if (preg_match($regexp, $errormsg)) {
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return $code;
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}
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}
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// Fall back to DB_ERROR if there was no mapping.
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return DB_ERROR;
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}
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// }}}
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// {{{ dropSequence()
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/**
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* Deletes a sequence
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*
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* @param string $seq_name name of the sequence to be deleted
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*
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* @return int DB_OK on success. DB_Error if problems.
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*
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* @internal
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* @see DB_common::dropSequence()
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* @access public
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*/
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function dropSequence($seq_name)
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{
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$seqname = $this->getSequenceName($seq_name);
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return $this->query("DROP TABLE $seqname");
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}
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/**
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* Creates a new sequence
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*
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* @param string $seq_name name of the new sequence
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*
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* @return int DB_OK on success. A DB_Error object is returned if
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* problems arise.
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*
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* @internal
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* @see DB_common::createSequence()
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* @access public
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*/
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function createSequence($seq_name)
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{
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$seqname = $this->getSequenceName($seq_name);
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$query = 'CREATE TABLE ' . $seqname .
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' (id INTEGER UNSIGNED PRIMARY KEY) ';
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$result = $this->query($query);
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if (DB::isError($result)) {
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return($result);
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}
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$query = "CREATE TRIGGER ${seqname}_cleanup AFTER INSERT ON $seqname
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BEGIN
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DELETE FROM $seqname WHERE id<LAST_INSERT_ROWID();
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END ";
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$result = $this->query($query);
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if (DB::isError($result)) {
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return($result);
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}
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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 in a sequence
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*
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* @param string $seq_name name of the sequence
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* @param boolean $ondemand when true, the seqence is automatically
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* created if it does not exist
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*
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* @return int the next id number in the sequence. DB_Error if problem.
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*
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* @internal
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* @see DB_common::nextID()
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* @access public
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*/
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function nextId($seq_name, $ondemand = true)
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{
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$seqname = $this->getSequenceName($seq_name);
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do {
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$repeat = 0;
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$this->pushErrorHandling(PEAR_ERROR_RETURN);
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$result = $this->query("INSERT INTO $seqname (id) VALUES (NULL)");
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$this->popErrorHandling();
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if ($result === DB_OK) {
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$id = @sqlite_last_insert_rowid($this->connection);
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if ($id != 0) {
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return $id;
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}
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} elseif ($ondemand && DB::isError($result) &&
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$result->getCode() == DB_ERROR_NOSUCHTABLE)
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{
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$result = $this->createSequence($seq_name);
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if (DB::isError($result)) {
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return $this->raiseError($result);
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} else {
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$repeat = 1;
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}
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}
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} while ($repeat);
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return $this->raiseError($result);
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}
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// }}}
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// {{{ getSpecialQuery()
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/**
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* Returns the query needed to get some backend info.
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*
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* Refer to the online manual at http://sqlite.org/sqlite.html.
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*
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* @param string $type What kind of info you want to retrieve
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* @return string The SQL query string
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*/
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function getSpecialQuery($type, $args=array())
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{
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if (!is_array($args))
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return $this->raiseError('no key specified', null, null, null,
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'Argument has to be an array.');
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switch (strtolower($type)) {
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case 'master':
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return 'SELECT * FROM sqlite_master;';
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case 'tables':
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return "SELECT name FROM sqlite_master WHERE type='table' "
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. 'UNION ALL SELECT name FROM sqlite_temp_master '
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. "WHERE type='table' ORDER BY name;";
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case 'schema':
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return 'SELECT sql FROM (SELECT * FROM sqlite_master UNION ALL '
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. 'SELECT * FROM sqlite_temp_master) '
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. "WHERE type!='meta' ORDER BY tbl_name, type DESC, name;";
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case 'schemax':
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case 'schema_x':
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/*
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* Use like:
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* $res = $db->query($db->getSpecialQuery('schema_x', array('table' => 'table3')));
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*/
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return 'SELECT sql FROM (SELECT * FROM sqlite_master UNION ALL '
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. 'SELECT * FROM sqlite_temp_master) '
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. "WHERE tbl_name LIKE '{$args['table']}' AND type!='meta' "
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. 'ORDER BY type DESC, name;';
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case 'alter':
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/*
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* SQLite does not support ALTER TABLE; this is a helper query
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* to handle this. 'table' represents the table name, 'rows'
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* the news rows to create, 'save' the row(s) to keep _with_
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* the data.
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*
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* Use like:
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* $args = array(
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* 'table' => $table,
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* 'rows' => "id INTEGER PRIMARY KEY, firstname TEXT, surname TEXT, datetime TEXT",
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* 'save' => "NULL, titel, content, datetime"
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* );
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* $res = $db->query( $db->getSpecialQuery('alter', $args));
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*/
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$rows = strtr($args['rows'], $this->keywords);
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$q = array(
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'BEGIN TRANSACTION',
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"CREATE TEMPORARY TABLE {$args['table']}_backup ({$args['rows']})",
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|
"INSERT INTO {$args['table']}_backup SELECT {$args['save']} FROM {$args['table']}",
|
|
"DROP TABLE {$args['table']}",
|
|
"CREATE TABLE {$args['table']} ({$args['rows']})",
|
|
"INSERT INTO {$args['table']} SELECT {$rows} FROM {$args['table']}_backup",
|
|
"DROP TABLE {$args['table']}_backup",
|
|
'COMMIT',
|
|
);
|
|
|
|
// This is a dirty hack, since the above query will no get executed with a single
|
|
// query call; so here the query method will be called directly and return a select instead.
|
|
foreach ($q as $query) {
|
|
$this->query($query);
|
|
}
|
|
return "SELECT * FROM {$args['table']};";
|
|
default:
|
|
return null;
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getDbFileStats()
|
|
|
|
/**
|
|
* Get the file stats for the current database.
|
|
*
|
|
* Possible arguments are dev, ino, mode, nlink, uid, gid, rdev, size,
|
|
* atime, mtime, ctime, blksize, blocks or a numeric key between
|
|
* 0 and 12.
|
|
*
|
|
* @param string $arg Array key for stats()
|
|
* @return mixed array on an unspecified key, integer on a passed arg and
|
|
* false at a stats error.
|
|
*/
|
|
function getDbFileStats($arg = '')
|
|
{
|
|
$stats = stat($this->dsn['database']);
|
|
if ($stats == false) {
|
|
return false;
|
|
}
|
|
if (is_array($stats)) {
|
|
if (is_numeric($arg)) {
|
|
if (((int)$arg <= 12) & ((int)$arg >= 0)) {
|
|
return false;
|
|
}
|
|
return $stats[$arg ];
|
|
}
|
|
if (array_key_exists(trim($arg), $stats)) {
|
|
return $stats[$arg ];
|
|
}
|
|
}
|
|
return $stats;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ escapeSimple()
|
|
|
|
/**
|
|
* Escape a string according to the current DBMS's standards
|
|
*
|
|
* In SQLite, this makes things safe for inserts/updates, but may
|
|
* cause problems when performing text comparisons against columns
|
|
* containing binary data. See the
|
|
* {@link http://php.net/sqlite_escape_string PHP manual} for more info.
|
|
*
|
|
* @param string $str the string to be escaped
|
|
*
|
|
* @return string the escaped string
|
|
*
|
|
* @since 1.6.1
|
|
* @see DB_common::escapeSimple()
|
|
* @internal
|
|
*/
|
|
function escapeSimple($str) {
|
|
return @sqlite_escape_string($str);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ modifyLimitQuery()
|
|
|
|
function modifyLimitQuery($query, $from, $count, $params = array())
|
|
{
|
|
$query = $query . " LIMIT $count OFFSET $from";
|
|
return $query;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ modifyQuery()
|
|
|
|
/**
|
|
* "DELETE FROM table" gives 0 affected rows in SQLite.
|
|
*
|
|
* This little hack lets you know how many rows were deleted.
|
|
*
|
|
* @param string $query The SQL query string
|
|
* @return string The SQL query string
|
|
*/
|
|
function _modifyQuery($query)
|
|
{
|
|
if ($this->options['portability'] & DB_PORTABILITY_DELETE_COUNT) {
|
|
if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {
|
|
$query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/',
|
|
'DELETE FROM \1 WHERE 1=1', $query);
|
|
}
|
|
}
|
|
return $query;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ sqliteRaiseError()
|
|
|
|
/**
|
|
* Gather information about an error, then use that info to create a
|
|
* DB error object and finally return that object.
|
|
*
|
|
* @param integer $errno PEAR error number (usually a DB constant) if
|
|
* manually raising an error
|
|
* @return object DB error object
|
|
* @see errorNative()
|
|
* @see errorCode()
|
|
* @see DB_common::raiseError()
|
|
*/
|
|
function sqliteRaiseError($errno = null)
|
|
{
|
|
|
|
$native = $this->errorNative();
|
|
if ($errno === null) {
|
|
$errno = $this->errorCode($native);
|
|
}
|
|
|
|
$errorcode = @sqlite_last_error($this->connection);
|
|
$userinfo = "$errorcode ** $this->last_query";
|
|
|
|
return $this->raiseError($errno, null, null, $userinfo, $native);
|
|
}
|
|
|
|
// }}}
|
|
}
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* End:
|
|
*/
|
|
|
|
?>
|