796 lines
23 KiB
PHP
796 lines
23 KiB
PHP
<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* The PEAR DB driver for PHP's fbsql extension
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* for interacting with FrontBase databases
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*
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* PHP version 5
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*
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* LICENSE: This source file is subject to version 3.0 of the PHP license
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* that is available through the world-wide-web at the following URI:
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* http://www.php.net/license/3_0.txt. If you did not receive a copy of
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* the PHP License and are unable to obtain it through the web, please
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* send a note to license@php.net so we can mail you a copy immediately.
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*
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* @category Database
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* @package DB
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* @author Frank M. Kromann <frank@frontbase.com>
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* @author Daniel Convissor <danielc@php.net>
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* @copyright 1997-2007 The PHP Group
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* @license http://www.php.net/license/3_0.txt PHP License 3.0
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* @version CVS: $Id$
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* @link http://pear.php.net/package/DB
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*/
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/**
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* Obtain the DB_common class so it can be extended from
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*/
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//require_once 'DB/common.php';
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require_once 'common.php';
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/**
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* The methods PEAR DB uses to interact with PHP's fbsql extension
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* for interacting with FrontBase databases
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*
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* These methods overload the ones declared in DB_common.
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*
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* @category Database
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* @package DB
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* @author Frank M. Kromann <frank@frontbase.com>
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* @author Daniel Convissor <danielc@php.net>
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* @copyright 1997-2007 The PHP Group
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* @license http://www.php.net/license/3_0.txt PHP License 3.0
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* @version Release: 1.9.2
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* @link http://pear.php.net/package/DB
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* @since Class functional since Release 1.7.0
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*/
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class DB_fbsql extends DB_common
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{
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// {{{ properties
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/**
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* The DB driver type (mysql, oci8, odbc, etc.)
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* @var string
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*/
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public $phptype = 'fbsql';
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/**
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* The database syntax variant to be used (db2, access, etc.), if any
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* @var string
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*/
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public $dbsyntax = 'fbsql';
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/**
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* The capabilities of this DB implementation
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*
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* The 'new_link' element contains the PHP version that first provided
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* new_link support for this DBMS. Contains false if it's unsupported.
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*
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* Meaning of the 'limit' element:
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* + 'emulate' = emulate with fetch row by number
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* + 'alter' = alter the query
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* + false = skip rows
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*
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* @var array
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*/
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public $features = array(
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'limit' => 'alter',
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'new_link' => false,
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'numrows' => true,
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'pconnect' => true,
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'prepare' => false,
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'ssl' => false,
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'transactions' => true,
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);
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/**
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* A mapping of native error codes to DB error codes
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* @var array
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*/
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public $errorcode_map = array(
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22 => DB_ERROR_SYNTAX,
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85 => DB_ERROR_ALREADY_EXISTS,
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108 => DB_ERROR_SYNTAX,
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116 => DB_ERROR_NOSUCHTABLE,
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124 => DB_ERROR_VALUE_COUNT_ON_ROW,
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215 => DB_ERROR_NOSUCHFIELD,
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217 => DB_ERROR_INVALID_NUMBER,
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226 => DB_ERROR_NOSUCHFIELD,
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231 => DB_ERROR_INVALID,
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239 => DB_ERROR_TRUNCATED,
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251 => DB_ERROR_SYNTAX,
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266 => DB_ERROR_NOT_FOUND,
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357 => DB_ERROR_CONSTRAINT_NOT_NULL,
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358 => DB_ERROR_CONSTRAINT,
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360 => DB_ERROR_CONSTRAINT,
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361 => DB_ERROR_CONSTRAINT,
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);
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/**
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* The raw database connection created by PHP
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* @var resource
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*/
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public $connection;
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/**
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* The DSN information for connecting to a database
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* @var array
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*/
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public $dsn = array();
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// }}}
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// {{{ constructor
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/**
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* This constructor calls <kbd>parent::__construct()</kbd>
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*
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* @return void
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*/
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public function __construct()
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{
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parent::__construct();
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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 server, log in and open the database
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*
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* Don't call this method directly. Use DB::connect() instead.
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*
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* @param array $dsn the data source name
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* @param bool $persistent should the connection be persistent?
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*
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* @return int|object
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*/
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public function connect($dsn, $persistent = false)
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{
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if (!PEAR::loadExtension('fbsql')) {
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return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
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}
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$this->dsn = $dsn;
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if ($dsn['dbsyntax']) {
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$this->dbsyntax = $dsn['dbsyntax'];
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}
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$params = array(
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$dsn['hostspec'] ? $dsn['hostspec'] : 'localhost',
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$dsn['username'] ? $dsn['username'] : null,
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$dsn['password'] ? $dsn['password'] : null,
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);
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$connect_function = $persistent ? 'fbsql_pconnect' : 'fbsql_connect';
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$ini = ini_get('track_errors');
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$php_errormsg = '';
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if ($ini) {
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$this->connection = @call_user_func_array(
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$connect_function,
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$params
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);
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} else {
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@ini_set('track_errors', 1);
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$this->connection = @call_user_func_array(
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$connect_function,
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$params
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);
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@ini_set('track_errors', $ini);
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}
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if (!$this->connection) {
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return $this->raiseError(
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DB_ERROR_CONNECT_FAILED,
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null,
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null,
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null,
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$php_errormsg
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);
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}
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if ($dsn['database']) {
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if (!@fbsql_select_db($dsn['database'], $this->connection)) {
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return $this->fbsqlRaiseError();
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}
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}
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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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* Produces a DB_Error object regarding the current problem
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*
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* @param int $errno if the error is being manually raised pass a
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* DB_ERROR* constant here. If this isn't passed
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* the error information gathered from the DBMS.
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*
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* @return object the DB_Error object
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*
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* @see DB_common::raiseError(),
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* DB_fbsql::errorNative(), DB_common::errorCode()
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*/
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public function fbsqlRaiseError($errno = null)
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{
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if ($errno === null) {
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$errno = $this->errorCode(fbsql_errno($this->connection));
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}
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return $this->raiseError(
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$errno,
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null,
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null,
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null,
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@fbsql_error($this->connection)
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);
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}
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// }}}
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// {{{ simpleQuery()
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/**
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* Disconnects from the database server
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*
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* @return bool TRUE on success, FALSE on failure
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*/
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public function disconnect()
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{
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$ret = @fbsql_close($this->connection);
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$this->connection = null;
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return $ret;
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}
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// }}}
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// {{{ nextResult()
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/**
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* Sends a query to the database server
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*
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* @param string the SQL query string
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*
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* @return mixed + a PHP result resrouce for successful SELECT queries
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* + the DB_OK constant for other successful queries
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* + a DB_Error object on failure
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*/
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public function simpleQuery($query)
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{
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$this->last_query = $query;
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$query = $this->modifyQuery($query);
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$result = @fbsql_query("$query;", $this->connection);
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if (!$result) {
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return $this->fbsqlRaiseError();
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}
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// Determine which queries that should return data, and which
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// should return an error code only.
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if ($this->_checkManip($query)) {
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return DB_OK;
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}
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return $result;
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}
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// }}}
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// {{{ fetchInto()
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/**
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* Move the internal fbsql result pointer to the next available result
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*
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* @param a valid fbsql result resource
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*
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* @access public
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*
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* @return true if a result is available otherwise return false
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*/
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public function nextResult($result)
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{
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return @fbsql_next_result($result);
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}
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// }}}
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// {{{ freeResult()
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/**
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* Places a row from the result set into the given 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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* This method is not meant to be called directly. Use
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* DB_result::fetchInto() instead. It can't be declared "protected"
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* because DB_result is a separate object.
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*
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* @param resource $result the query result resource
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* @param array $arr the referenced array to put the data in
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* @param int $fetchmode how the resulting array should be indexed
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* @param int $rownum the row number to fetch (0 = first row)
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*
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* @return mixed DB_OK on success, NULL when the end of a result set is
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* reached or on failure
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*
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* @see DB_result::fetchInto()
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*/
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public function fetchInto($result, &$arr, $fetchmode, $rownum = null)
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{
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if ($rownum !== null) {
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if (!@fbsql_data_seek($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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$arr = @fbsql_fetch_array($result, FBSQL_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 = @fbsql_fetch_row($result);
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}
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if (!$arr) {
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return null;
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}
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if ($this->options['portability'] & DB_PORTABILITY_RTRIM) {
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$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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// {{{ autoCommit()
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/**
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* Deletes the result set and frees the memory occupied by the result set
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*
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* This method is not meant to be called directly. Use
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* DB_result::free() instead. It can't be declared "protected"
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* because DB_result is a separate object.
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*
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* @param resource $result PHP's query result resource
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*
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* @return bool TRUE on success, FALSE if $result is invalid
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*
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* @see DB_result::free()
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*/
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public function freeResult($result)
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{
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return is_resource($result) ? fbsql_free_result($result) : false;
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}
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// }}}
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// {{{ commit()
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/**
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* Enables or disables automatic commits
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*
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* @param bool $onoff true turns it on, false turns it off
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*
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* @return int DB_OK on success. A DB_Error object if the driver
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* doesn't support auto-committing transactions.
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*/
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public function autoCommit($onoff = false)
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{
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if ($onoff) {
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$this->query("SET COMMIT TRUE");
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} else {
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$this->query("SET COMMIT FALSE");
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}
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return null;
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}
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// }}}
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// {{{ rollback()
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/**
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* Commits the current transaction
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*
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* @return int DB_OK on success. A DB_Error object on failure.
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*/
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public function commit()
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{
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@fbsql_commit($this->connection);
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return 0;
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}
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// }}}
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// {{{ numCols()
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/**
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* Reverts the current transaction
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*
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* @return int DB_OK on success. A DB_Error object on failure.
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*/
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public function rollback()
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{
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@fbsql_rollback($this->connection);
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return 0;
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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 columns in a result set
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*
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* This method is not meant to be called directly. Use
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* DB_result::numCols() instead. It can't be declared "protected"
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* because DB_result is a separate object.
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*
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* @param resource $result PHP's query result resource
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*
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* @return int|object
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*
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* @see DB_result::numCols()
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*/
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public function numCols($result)
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{
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$cols = @fbsql_num_fields($result);
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if (!$cols) {
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return $this->fbsqlRaiseError();
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}
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return $cols;
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}
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// }}}
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// {{{ affectedRows()
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/**
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* Gets the number of rows in a result set
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*
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* This method is not meant to be called directly. Use
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* DB_result::numRows() instead. It can't be declared "protected"
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* because DB_result is a separate object.
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*
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* @param resource $result PHP's query result resource
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*
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* @return int|object
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*
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* @see DB_result::numRows()
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*/
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public function numRows($result)
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{
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$rows = @fbsql_num_rows($result);
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if ($rows === null) {
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return $this->fbsqlRaiseError();
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}
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return $rows;
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}
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// }}}
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// {{{ nextId()
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/**
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* Determines the number of rows affected by a data maniuplation query
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*
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* 0 is returned for queries that don't manipulate data.
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*
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* @return int the number of rows. A DB_Error object on failure.
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*/
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public function affectedRows()
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{
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if ($this->_last_query_manip) {
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$result = @fbsql_affected_rows($this->connection);
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} else {
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$result = 0;
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}
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return $result;
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}
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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 $ondemand when true, the seqence is automatically
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* created if it does not exist
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*
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* @return int|object
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* A DB_Error object on failure.
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*
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* @see DB_common::nextID(), DB_common::getSequenceName(),
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* DB_fbsql::createSequence(), DB_fbsql::dropSequence()
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*/
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public function nextId($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('SELECT UNIQUE FROM ' . $seqname);
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$this->popErrorHandling();
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if ($ondemand && DB::isError($result) &&
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$result->getCode() == DB_ERROR_NOSUCHTABLE) {
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$repeat = 1;
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$result = $this->createSequence($seq_name);
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if (DB::isError($result)) {
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return $result;
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}
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} else {
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$repeat = 0;
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}
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} while ($repeat);
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if (DB::isError($result)) {
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return $this->fbsqlRaiseError();
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}
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$result->fetchInto($tmp, DB_FETCHMODE_ORDERED);
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return $tmp[0];
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}
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// }}}
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// {{{ dropSequence()
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/**
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* Creates a new sequence
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*
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* @param string $seq_name name of the new sequence
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*
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* @return int DB_OK on success. A DB_Error object on failure.
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*
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* @see DB_common::createSequence(), DB_common::getSequenceName(),
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* DB_fbsql::nextID(), DB_fbsql::dropSequence()
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*/
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public function createSequence($seq_name)
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{
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$seqname = $this->getSequenceName($seq_name);
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$res = $this->query('CREATE TABLE ' . $seqname
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. ' (id INTEGER NOT NULL,'
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. ' PRIMARY KEY(id))');
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if ($res) {
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$res = $this->query('SET UNIQUE = 0 FOR ' . $seqname);
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}
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return $res;
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}
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// }}}
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// {{{ modifyLimitQuery()
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/**
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* Deletes a sequence
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*
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* @param string $seq_name name of the sequence to be deleted
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*
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* @return int DB_OK on success. A DB_Error object on failure.
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*
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* @see DB_common::dropSequence(), DB_common::getSequenceName(),
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* DB_fbsql::nextID(), DB_fbsql::createSequence()
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*/
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public function dropSequence($seq_name)
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{
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return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name)
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. ' RESTRICT');
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}
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// }}}
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// {{{ quoteBoolean()
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/**
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|
* Adds LIMIT clauses to a query string according to current DBMS standards
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|
*
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* @param string $query the query to modify
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|
* @param int $from the row to start to fetching (0 = the first row)
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|
* @param int $count the numbers of rows to fetch
|
|
* @param mixed $params array, string or numeric data to be used in
|
|
* execution of the statement. Quantity of items
|
|
* passed must match quantity of placeholders in
|
|
* query: meaning 1 placeholder for non-array
|
|
* parameters or 1 placeholder per array element.
|
|
*
|
|
* @return string the query string with LIMIT clauses added
|
|
*
|
|
* @access protected
|
|
*/
|
|
public function modifyLimitQuery($query, $from, $count, $params = array())
|
|
{
|
|
if (DB::isManip($query) || $this->_next_query_manip) {
|
|
return preg_replace(
|
|
'/^([\s(])*SELECT/i',
|
|
"\\1SELECT TOP($count)",
|
|
$query
|
|
);
|
|
} else {
|
|
return preg_replace(
|
|
'/([\s(])*SELECT/i',
|
|
"\\1SELECT TOP($from, $count)",
|
|
$query
|
|
);
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ quoteFloat()
|
|
|
|
/**
|
|
* Formats a boolean value for use within a query in a locale-independent
|
|
* manner.
|
|
*
|
|
* @param boolean the boolean value to be quoted.
|
|
* @return string the quoted string.
|
|
* @see DB_common::quoteSmart()
|
|
* @since Method available since release 1.7.8.
|
|
*/
|
|
public function quoteBoolean($boolean)
|
|
{
|
|
return $boolean ? 'TRUE' : 'FALSE';
|
|
}
|
|
|
|
// }}}
|
|
// {{{ fbsqlRaiseError()
|
|
|
|
/**
|
|
* Formats a float value for use within a query in a locale-independent
|
|
* manner.
|
|
*
|
|
* @param float the float value to be quoted.
|
|
* @return string the quoted string.
|
|
* @see DB_common::quoteSmart()
|
|
* @since Method available since release 1.7.8.
|
|
*/
|
|
public function quoteFloat($float)
|
|
{
|
|
return $this->escapeSimple(str_replace(',', '.', strval(floatval($float))));
|
|
}
|
|
|
|
// }}}
|
|
// {{{ errorNative()
|
|
|
|
/**
|
|
* Gets the DBMS' native error code produced by the last query
|
|
*
|
|
* @return int the DBMS' error code
|
|
*/
|
|
public function errorNative()
|
|
{
|
|
return @fbsql_errno($this->connection);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ tableInfo()
|
|
|
|
/**
|
|
* Returns information about a table or a result set
|
|
*
|
|
* @param object|string $result DB_result object from a query or a
|
|
* string containing the name of a table.
|
|
* While this also accepts a query result
|
|
* resource identifier, this behavior is
|
|
* deprecated.
|
|
* @param int $mode a valid tableInfo mode
|
|
*
|
|
* @return array|object
|
|
* A DB_Error object on failure.
|
|
*
|
|
* @see DB_common::tableInfo()
|
|
*/
|
|
public function tableInfo($result, $mode = null)
|
|
{
|
|
if (is_string($result)) {
|
|
/*
|
|
* Probably received a table name.
|
|
* Create a result resource identifier.
|
|
*/
|
|
$id = @fbsql_list_fields(
|
|
$this->dsn['database'],
|
|
$result,
|
|
$this->connection
|
|
);
|
|
$got_string = true;
|
|
} elseif (isset($result->result)) {
|
|
/*
|
|
* Probably received a result object.
|
|
* Extract the result resource identifier.
|
|
*/
|
|
$id = $result->result;
|
|
$got_string = false;
|
|
} else {
|
|
/*
|
|
* Probably received a result resource identifier.
|
|
* Copy it.
|
|
* Deprecated. Here for compatibility only.
|
|
*/
|
|
$id = $result;
|
|
$got_string = false;
|
|
}
|
|
|
|
if (!is_resource($id)) {
|
|
return $this->fbsqlRaiseError(DB_ERROR_NEED_MORE_DATA);
|
|
}
|
|
|
|
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
|
|
$case_func = 'strtolower';
|
|
} else {
|
|
$case_func = 'strval';
|
|
}
|
|
|
|
$count = @fbsql_num_fields($id);
|
|
$res = array();
|
|
|
|
if ($mode) {
|
|
$res['num_fields'] = $count;
|
|
}
|
|
|
|
for ($i = 0; $i < $count; $i++) {
|
|
$res[$i] = array(
|
|
'table' => $case_func(@fbsql_field_table($id, $i)),
|
|
'name' => $case_func(@fbsql_field_name($id, $i)),
|
|
'type' => @fbsql_field_type($id, $i),
|
|
'len' => @fbsql_field_len($id, $i),
|
|
'flags' => @fbsql_field_flags($id, $i),
|
|
);
|
|
if ($mode & DB_TABLEINFO_ORDER) {
|
|
$res['order'][$res[$i]['name']] = $i;
|
|
}
|
|
if ($mode & DB_TABLEINFO_ORDERTABLE) {
|
|
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
|
|
}
|
|
}
|
|
|
|
// free the result only if we were called on a table
|
|
if ($got_string) {
|
|
@fbsql_free_result($id);
|
|
}
|
|
return $res;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getSpecialQuery()
|
|
|
|
/**
|
|
* Obtains the query string needed for listing a given type of objects
|
|
*
|
|
* @param string $type the kind of objects you want to retrieve
|
|
*
|
|
* @return string the SQL query string or null if the driver doesn't
|
|
* support the object type requested
|
|
*
|
|
* @access protected
|
|
* @see DB_common::getListOf()
|
|
*/
|
|
public function getSpecialQuery($type)
|
|
{
|
|
switch ($type) {
|
|
case 'tables':
|
|
return 'SELECT "table_name" FROM information_schema.tables'
|
|
. ' t0, information_schema.schemata t1'
|
|
. ' WHERE t0.schema_pk=t1.schema_pk AND'
|
|
. ' "table_type" = \'BASE TABLE\''
|
|
. ' AND "schema_name" = current_schema';
|
|
case 'views':
|
|
return 'SELECT "table_name" FROM information_schema.tables'
|
|
. ' t0, information_schema.schemata t1'
|
|
. ' WHERE t0.schema_pk=t1.schema_pk AND'
|
|
. ' "table_type" = \'VIEW\''
|
|
. ' AND "schema_name" = current_schema';
|
|
case 'users':
|
|
return 'SELECT "user_name" from information_schema.users';
|
|
case 'functions':
|
|
return 'SELECT "routine_name" FROM'
|
|
. ' information_schema.psm_routines'
|
|
. ' t0, information_schema.schemata t1'
|
|
. ' WHERE t0.schema_pk=t1.schema_pk'
|
|
. ' AND "routine_kind"=\'FUNCTION\''
|
|
. ' AND "schema_name" = current_schema';
|
|
case 'procedures':
|
|
return 'SELECT "routine_name" FROM'
|
|
. ' information_schema.psm_routines'
|
|
. ' t0, information_schema.schemata t1'
|
|
. ' WHERE t0.schema_pk=t1.schema_pk'
|
|
. ' AND "routine_kind"=\'PROCEDURE\''
|
|
. ' AND "schema_name" = current_schema';
|
|
default:
|
|
return null;
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
}
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* End:
|
|
*/
|