684 lines
20 KiB
PHP
684 lines
20 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 ifx extension
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* for interacting with Informix 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 Tomas V.V.Cox <cox@idecnet.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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/**
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* The methods PEAR DB uses to interact with PHP's ifx extension
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* for interacting with Informix 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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* More info on Informix errors can be found at:
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* http://www.informix.com/answers/english/ierrors.htm
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*
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* TODO:
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* - set needed env Informix vars on connect
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* - implement native prepare/execute
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*
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* @category Database
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* @package DB
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* @author Tomas V.V.Cox <cox@idecnet.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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*/
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class DB_ifx 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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var $phptype = 'ifx';
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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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var $dbsyntax = 'ifx';
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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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var $features = array(
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'limit' => 'emulate',
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'new_link' => false,
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'numrows' => 'emulate',
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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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var $errorcode_map = array(
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'-201' => DB_ERROR_SYNTAX,
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'-206' => DB_ERROR_NOSUCHTABLE,
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'-217' => DB_ERROR_NOSUCHFIELD,
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'-236' => DB_ERROR_VALUE_COUNT_ON_ROW,
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'-239' => DB_ERROR_CONSTRAINT,
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'-253' => DB_ERROR_SYNTAX,
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'-268' => DB_ERROR_CONSTRAINT,
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'-292' => DB_ERROR_CONSTRAINT_NOT_NULL,
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'-310' => DB_ERROR_ALREADY_EXISTS,
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'-316' => DB_ERROR_ALREADY_EXISTS,
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'-319' => DB_ERROR_NOT_FOUND,
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'-329' => DB_ERROR_NODBSELECTED,
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'-346' => DB_ERROR_CONSTRAINT,
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'-386' => DB_ERROR_CONSTRAINT_NOT_NULL,
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'-391' => DB_ERROR_CONSTRAINT_NOT_NULL,
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'-554' => DB_ERROR_SYNTAX,
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'-691' => DB_ERROR_CONSTRAINT,
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'-692' => DB_ERROR_CONSTRAINT,
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'-703' => DB_ERROR_CONSTRAINT_NOT_NULL,
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'-1202' => DB_ERROR_DIVZERO,
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'-1204' => DB_ERROR_INVALID_DATE,
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'-1205' => DB_ERROR_INVALID_DATE,
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'-1206' => DB_ERROR_INVALID_DATE,
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'-1209' => DB_ERROR_INVALID_DATE,
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'-1210' => DB_ERROR_INVALID_DATE,
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'-1212' => DB_ERROR_INVALID_DATE,
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'-1213' => DB_ERROR_INVALID_NUMBER,
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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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var $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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var $dsn = array();
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/**
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* Should data manipulation queries be committed automatically?
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* @var bool
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* @access private
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*/
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var $autocommit = true;
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/**
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* The quantity of transactions begun
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*
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* {@internal While this is private, it can't actually be designated
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* private in PHP 5 because it is directly accessed in the test suite.}}
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*
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* @var integer
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* @access private
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*/
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var $transaction_opcount = 0;
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/**
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* The number of rows affected by a data manipulation query
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* @var integer
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* @access private
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*/
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var $affected = 0;
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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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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 $persistent should the connection be persistent?
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*
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* @return int DB_OK on success. A DB_Error object on failure.
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*/
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function connect($dsn, $persistent = false)
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{
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if (!PEAR::loadExtension('informix') &&
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!PEAR::loadExtension('Informix'))
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{
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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 = $dsn['dbsyntax'];
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}
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$dbhost = $dsn['hostspec'] ? '@' . $dsn['hostspec'] : '';
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$dbname = $dsn['database'] ? $dsn['database'] . $dbhost : '';
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$user = $dsn['username'] ? $dsn['username'] : '';
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$pw = $dsn['password'] ? $dsn['password'] : '';
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$connect_function = $persistent ? 'ifx_pconnect' : 'ifx_connect';
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$this->connection = @$connect_function($dbname, $user, $pw);
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if (!is_resource($this->connection)) {
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return $this->ifxRaiseError(DB_ERROR_CONNECT_FAILED);
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}
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return DB_OK;
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}
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// }}}
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// {{{ disconnect()
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/**
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* Disconnects from the database server
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*
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* @return bool TRUE on success, FALSE on failure
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*/
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function disconnect()
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{
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$ret = @ifx_close($this->connection);
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$this->connection = null;
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return $ret;
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}
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// }}}
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// {{{ simpleQuery()
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/**
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* Sends a query to the database server
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*
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* @param string the SQL query string
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*
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* @return mixed + a PHP result resrouce for successful SELECT queries
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* + the DB_OK constant for other successful queries
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* + a DB_Error object on failure
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*/
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function simpleQuery($query)
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{
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$ismanip = $this->_checkManip($query);
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$this->last_query = $query;
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$this->affected = null;
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if (preg_match('/(SELECT|EXECUTE)/i', $query)) { //TESTME: Use !DB::isManip()?
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// the scroll is needed for fetching absolute row numbers
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// in a select query result
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$result = @ifx_query($query, $this->connection, IFX_SCROLL);
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} else {
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if (!$this->autocommit && $ismanip) {
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if ($this->transaction_opcount == 0) {
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$result = @ifx_query('BEGIN WORK', $this->connection);
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if (!$result) {
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return $this->ifxRaiseError();
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}
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}
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$this->transaction_opcount++;
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}
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$result = @ifx_query($query, $this->connection);
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}
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if (!$result) {
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return $this->ifxRaiseError();
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}
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$this->affected = @ifx_affected_rows($result);
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// Determine which queries should return data, and which
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// should return an error code only.
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if (preg_match('/(SELECT|EXECUTE)/i', $query)) {
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return $result;
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}
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// XXX Testme: free results inside a transaction
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// may cause to stop it and commit the work?
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// Result has to be freed even with a insert or update
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@ifx_free_result($result);
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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 ifx 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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function nextResult($result)
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{
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return false;
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}
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// }}}
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// {{{ affectedRows()
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/**
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* Determines the number of rows affected by a data maniuplation query
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*
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* 0 is returned for queries that don't manipulate data.
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*
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* @return int the number of rows. A DB_Error object on failure.
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*/
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function affectedRows()
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{
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if ($this->_last_query_manip) {
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return $this->affected;
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} else {
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return 0;
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}
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}
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// }}}
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// {{{ fetchInto()
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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 $rownum the row number to fetch (0 = first row)
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*
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* @return mixed DB_OK on success, NULL when the end of a result set is
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* reached or on failure
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*
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* @see DB_result::fetchInto()
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*/
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function fetchInto($result, &$arr, $fetchmode, $rownum = null)
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{
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if (($rownum !== null) && ($rownum < 0)) {
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return null;
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}
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if ($rownum === null) {
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/*
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* Even though fetch_row() should return the next row if
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* $rownum is null, it doesn't in all cases. Bug 598.
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*/
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$rownum = 'NEXT';
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} else {
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// Index starts at row 1, unlike most DBMS's starting at 0.
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$rownum++;
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}
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if (!$arr = @ifx_fetch_row($result, $rownum)) {
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return null;
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}
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if ($fetchmode !== DB_FETCHMODE_ASSOC) {
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$i=0;
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$order = array();
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foreach ($arr as $val) {
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$order[$i++] = $val;
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}
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$arr = $order;
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} elseif ($fetchmode == DB_FETCHMODE_ASSOC &&
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$this->options['portability'] & DB_PORTABILITY_LOWERCASE)
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{
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$arr = array_change_key_case($arr, CASE_LOWER);
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}
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if ($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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// {{{ 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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* 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 $result PHP's query result resource
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*
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* @return int the number of columns. A DB_Error object on failure.
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*
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* @see DB_result::numCols()
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*/
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function numCols($result)
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{
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if (!$cols = @ifx_num_fields($result)) {
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return $this->ifxRaiseError();
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}
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return $cols;
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}
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// }}}
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// {{{ freeResult()
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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 $result is invalid
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*
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* @see DB_result::free()
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*/
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function freeResult($result)
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{
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return is_resource($result) ? ifx_free_result($result) : false;
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}
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// }}}
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// {{{ autoCommit()
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/**
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* Enables or disables automatic commits
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*
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* @param bool $onoff true turns it on, false turns it off
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*
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* @return int DB_OK on success. A DB_Error object if the driver
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* doesn't support auto-committing transactions.
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*/
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function autoCommit($onoff = true)
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{
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// XXX if $this->transaction_opcount > 0, we should probably
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// issue a warning here.
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$this->autocommit = $onoff ? true : false;
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return DB_OK;
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}
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// }}}
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// {{{ commit()
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/**
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* Commits the current transaction
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*
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* @return int DB_OK on success. A DB_Error object on failure.
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*/
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function commit()
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{
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if ($this->transaction_opcount > 0) {
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$result = @ifx_query('COMMIT WORK', $this->connection);
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$this->transaction_opcount = 0;
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if (!$result) {
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return $this->ifxRaiseError();
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}
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}
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return DB_OK;
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}
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// }}}
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// {{{ rollback()
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/**
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* Reverts the current transaction
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*
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* @return int DB_OK on success. A DB_Error object on failure.
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*/
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function rollback()
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{
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if ($this->transaction_opcount > 0) {
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$result = @ifx_query('ROLLBACK WORK', $this->connection);
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$this->transaction_opcount = 0;
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if (!$result) {
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return $this->ifxRaiseError();
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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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// {{{ ifxRaiseError()
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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 $errno if the error is being manually raised pass a
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* DB_ERROR* constant here. If this isn't passed
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* the error information gathered from the DBMS.
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*
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* @return object the DB_Error object
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*
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* @see DB_common::raiseError(),
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* DB_ifx::errorNative(), DB_ifx::errorCode()
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*/
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function ifxRaiseError($errno = null)
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{
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if ($errno === null) {
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$errno = $this->errorCode(ifx_error());
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}
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return $this->raiseError($errno, null, null, null,
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$this->errorNative());
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}
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// }}}
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// {{{ errorNative()
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/**
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* Gets the DBMS' native error code and message produced by the last query
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*
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* @return string the DBMS' error code and message
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*/
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function errorNative()
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{
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return @ifx_error() . ' ' . @ifx_errormsg();
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}
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// }}}
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// {{{ errorCode()
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/**
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* Maps native error codes to DB's portable ones.
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*
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* Requires that the DB implementation's constructor fills
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* in the <var>$errorcode_map</var> property.
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*
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* @param string $nativecode error code returned by the database
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* @return int a portable DB error code, or DB_ERROR if this DB
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* implementation has no mapping for the given error code.
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*/
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function errorCode($nativecode)
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{
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if (preg_match('/SQLCODE=(.*)]/', $nativecode, $match)) {
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$code = $match[1];
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if (isset($this->errorcode_map[$code])) {
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return $this->errorcode_map[$code];
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}
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}
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return DB_ERROR;
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}
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// }}}
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// {{{ tableInfo()
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/**
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* Returns information about a table or a result set
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*
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* NOTE: only supports 'table' if <var>$result</var> is a table name.
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*
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* If analyzing a query result and the result has duplicate field names,
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* an error will be raised saying
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* <samp>can't distinguish duplicate field names</samp>.
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*
|
|
* @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 $mode a valid tableInfo mode
|
|
*
|
|
* @return array an associative array with the information requested.
|
|
* A DB_Error object on failure.
|
|
*
|
|
* @see DB_common::tableInfo()
|
|
* @since Method available since Release 1.6.0
|
|
*/
|
|
function tableInfo($result, $mode = null)
|
|
{
|
|
if (is_string($result)) {
|
|
/*
|
|
* Probably received a table name.
|
|
* Create a result resource identifier.
|
|
*/
|
|
$id = @ifx_query("SELECT * FROM $result WHERE 1=0",
|
|
$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.
|
|
*/
|
|
$id = $result;
|
|
$got_string = false;
|
|
}
|
|
|
|
if (!is_resource($id)) {
|
|
return $this->ifxRaiseError(DB_ERROR_NEED_MORE_DATA);
|
|
}
|
|
|
|
$flds = @ifx_fieldproperties($id);
|
|
$count = @ifx_num_fields($id);
|
|
|
|
if (count($flds) != $count) {
|
|
return $this->raiseError("can't distinguish duplicate field names");
|
|
}
|
|
|
|
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
|
|
$case_func = 'strtolower';
|
|
} else {
|
|
$case_func = 'strval';
|
|
}
|
|
|
|
$i = 0;
|
|
$res = array();
|
|
|
|
if ($mode) {
|
|
$res['num_fields'] = $count;
|
|
}
|
|
|
|
foreach ($flds as $key => $value) {
|
|
$props = explode(';', $value);
|
|
$res[$i] = array(
|
|
'table' => $got_string ? $case_func($result) : '',
|
|
'name' => $case_func($key),
|
|
'type' => $props[0],
|
|
'len' => $props[1],
|
|
'flags' => $props[4] == 'N' ? 'not_null' : '',
|
|
);
|
|
if ($mode & DB_TABLEINFO_ORDER) {
|
|
$res['order'][$res[$i]['name']] = $i;
|
|
}
|
|
if ($mode & DB_TABLEINFO_ORDERTABLE) {
|
|
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
|
|
}
|
|
$i++;
|
|
}
|
|
|
|
// free the result only if we were called on a table
|
|
if ($got_string) {
|
|
@ifx_free_result($id);
|
|
}
|
|
return $res;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getSpecialQuery()
|
|
|
|
/**
|
|
* Obtains the query string needed for listing a given type of objects
|
|
*
|
|
* @param string $type the kind of objects you want to retrieve
|
|
*
|
|
* @return string the SQL query string or null if the driver doesn't
|
|
* support the object type requested
|
|
*
|
|
* @access protected
|
|
* @see DB_common::getListOf()
|
|
*/
|
|
function getSpecialQuery($type)
|
|
{
|
|
switch ($type) {
|
|
case 'tables':
|
|
return 'SELECT tabname FROM systables WHERE tabid >= 100';
|
|
default:
|
|
return null;
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
|
|
}
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* End:
|
|
*/
|
|
|
|
?>
|