1183 lines
37 KiB
PHP
1183 lines
37 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 oci8 extension
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* for interacting with Oracle 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 James L. Pine <jlp@valinux.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 oci8 extension
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* for interacting with Oracle databases
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*
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* Definitely works with versions 8 and 9 of Oracle.
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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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* Be aware... OCIError() only appears to return anything when given a
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* statement, so functions return the generic DB_ERROR instead of more
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* useful errors that have to do with feedback from the database.
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*
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* @category Database
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* @package DB
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* @author James L. Pine <jlp@valinux.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_oci8 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 = 'oci8';
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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 = 'oci8';
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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' => '5.0.0',
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'numrows' => 'subquery',
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'pconnect' => true,
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'prepare' => true,
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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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1 => DB_ERROR_CONSTRAINT,
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900 => DB_ERROR_SYNTAX,
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904 => DB_ERROR_NOSUCHFIELD,
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913 => DB_ERROR_VALUE_COUNT_ON_ROW,
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921 => DB_ERROR_SYNTAX,
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923 => DB_ERROR_SYNTAX,
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942 => DB_ERROR_NOSUCHTABLE,
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955 => DB_ERROR_ALREADY_EXISTS,
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1400 => DB_ERROR_CONSTRAINT_NOT_NULL,
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1401 => DB_ERROR_INVALID,
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1407 => DB_ERROR_CONSTRAINT_NOT_NULL,
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1418 => DB_ERROR_NOT_FOUND,
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1476 => DB_ERROR_DIVZERO,
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1722 => DB_ERROR_INVALID_NUMBER,
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2289 => DB_ERROR_NOSUCHTABLE,
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2291 => DB_ERROR_CONSTRAINT,
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2292 => DB_ERROR_CONSTRAINT,
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2449 => DB_ERROR_CONSTRAINT,
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12899 => DB_ERROR_INVALID,
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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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* 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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public $autocommit = true;
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/**
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* Stores the $data passed to execute() in the oci8 driver
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*
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* Gets reset to array() when simpleQuery() is run.
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*
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* Needed in case user wants to call numRows() after prepare/execute
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* was used.
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*
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* @var array
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* @access private
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*/
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public $_data = array();
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/**
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* The result or statement handle from the most recently executed query
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* @var resource
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*/
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public $last_stmt;
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/**
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* Is the given prepared statement a data manipulation query?
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* @var array
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* @access private
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*/
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public $manip_query = array();
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/**
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* Store of prepared SQL queries.
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* @var array
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* @access private
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*/
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public $_prepared_queries = 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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* If PHP is at version 5.0.0 or greater:
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* + Generally, oci_connect() or oci_pconnect() are used.
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* + But if the new_link DSN option is set to true, oci_new_connect()
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* is used.
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*
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* When using PHP version 4.x, OCILogon() or OCIPLogon() are used.
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*
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* PEAR DB's oci8 driver supports the following extra DSN options:
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* + charset The character set to be used on the connection.
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* Only used if PHP is at version 5.0.0 or greater
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* and the Oracle server is at 9.2 or greater.
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* Available since PEAR DB 1.7.0.
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* + new_link If set to true, causes subsequent calls to
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* connect() to return a new connection link
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* instead of the existing one. WARNING: this is
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* not portable to other DBMS's.
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* Available since PEAR DB 1.7.0.
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*
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* @param array $dsn the data source name
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* @param bool $persistent should the connection be persistent?
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*
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* @return int DB_OK on success. A DB_Error object on failure.
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*/
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public function connect($dsn, $persistent = false)
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{
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if (!PEAR::loadExtension('oci8')) {
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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 = $dsn['dbsyntax'];
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}
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// Backwards compatibility with DB < 1.7.0
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if (empty($dsn['database']) && !empty($dsn['hostspec'])) {
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$db = $dsn['hostspec'];
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} else {
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$db = $dsn['database'];
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}
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if (function_exists('oci_connect')) {
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if (isset($dsn['new_link'])
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&& ($dsn['new_link'] == 'true' || $dsn['new_link'] === true)) {
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$connect_function = 'oci_new_connect';
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} else {
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$connect_function = $persistent ? 'oci_pconnect'
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: 'oci_connect';
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}
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if (isset($this->dsn['port']) && $this->dsn['port']) {
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$db = '//'.$db.':'.$this->dsn['port'];
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}
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$char = empty($dsn['charset']) ? null : $dsn['charset'];
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$this->connection = @$connect_function(
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$dsn['username'],
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$dsn['password'],
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$db,
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$char
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);
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$error = OCIError();
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if (!empty($error) && $error['code'] == 12541) {
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// Couldn't find TNS listener. Try direct connection.
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$this->connection = @$connect_function(
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$dsn['username'],
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$dsn['password'],
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null,
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$char
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);
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}
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} else {
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$connect_function = $persistent ? 'OCIPLogon' : 'OCILogon';
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if ($db) {
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$this->connection = @$connect_function(
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$dsn['username'],
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$dsn['password'],
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$db
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);
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} elseif ($dsn['username'] || $dsn['password']) {
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$this->connection = @$connect_function(
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$dsn['username'],
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$dsn['password']
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);
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}
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}
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if (!$this->connection) {
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$error = OCIError();
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$error = (is_array($error)) ? $error['message'] : null;
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return $this->raiseError(
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DB_ERROR_CONNECT_FAILED,
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null,
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null,
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null,
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$error
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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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* 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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if (function_exists('oci_close')) {
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$ret = @oci_close($this->connection);
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} else {
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$ret = @OCILogOff($this->connection);
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}
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$this->connection = null;
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return $ret;
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}
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// }}}
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// {{{ simpleQuery()
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/**
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* Sends a query to the database server
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*
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* To determine how many rows of a result set get buffered using
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* ocisetprefetch(), see the "result_buffering" option in setOptions().
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* This option was added in Release 1.7.0.
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*
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* @param string the SQL query string
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*
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* @return mixed + a PHP result resrouce for successful SELECT queries
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* + the DB_OK constant for other successful queries
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* + a DB_Error object on failure
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*/
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public function simpleQuery($query)
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{
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$this->_data = array();
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$this->last_parameters = array();
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$this->last_query = $query;
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$query = $this->modifyQuery($query);
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$result = @OCIParse($this->connection, $query);
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if (!$result) {
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return $this->oci8RaiseError();
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}
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if ($this->autocommit) {
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$success = @OCIExecute($result, OCI_COMMIT_ON_SUCCESS);
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} else {
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$success = @OCIExecute($result, OCI_DEFAULT);
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}
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if (!$success) {
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return $this->oci8RaiseError($result);
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}
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$this->last_stmt = $result;
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if ($this->_checkManip($query)) {
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return DB_OK;
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} else {
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@ocisetprefetch($result, $this->options['result_buffering']);
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return $result;
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}
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}
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// }}}
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// {{{ nextResult()
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/**
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* Move the internal oracle result pointer to the next available result
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*
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* @param a valid oci8 result resource
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*
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* @access public
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*
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* @return true if a result is available otherwise return false
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*/
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public function nextResult($result)
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{
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return false;
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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 $rownum the row number to fetch (0 = first row)
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*
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* @return mixed DB_OK on success, NULL when the end of a result set is
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* reached or on failure
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*
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* @see DB_result::fetchInto()
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*/
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public function fetchInto($result, &$arr, $fetchmode, $rownum = null)
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{
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if ($rownum !== null) {
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return $this->raiseError(DB_ERROR_NOT_CAPABLE);
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}
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if ($fetchmode & DB_FETCHMODE_ASSOC) {
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$moredata = @OCIFetchInto($result, $arr, OCI_ASSOC+OCI_RETURN_NULLS+OCI_RETURN_LOBS);
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if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE &&
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$moredata) {
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$arr = array_change_key_case($arr, CASE_LOWER);
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}
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} else {
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$moredata = OCIFetchInto($result, $arr, OCI_RETURN_NULLS+OCI_RETURN_LOBS);
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}
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if (!$moredata) {
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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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// {{{ 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 $result is invalid
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*
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* @see DB_result::free()
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*/
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public function freeResult($result)
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{
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return is_resource($result) ? OCIFreeStatement($result) : false;
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}
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/**
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* Frees the internal resources associated with a prepared query
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*
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* @param resource $stmt the prepared statement's resource
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* @param bool $free_resource should the PHP resource be freed too?
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* Use false if you need to get data
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* from the result set later.
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*
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* @return bool TRUE on success, FALSE if $result is invalid
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*
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* @see DB_oci8::prepare()
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*/
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public function freePrepared($stmt, $free_resource = true)
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{
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if (!is_resource($stmt)) {
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return false;
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}
|
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if ($free_resource) {
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@ocifreestatement($stmt);
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}
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if (isset($this->prepare_types[(int)$stmt])) {
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unset($this->prepare_types[(int)$stmt]);
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unset($this->manip_query[(int)$stmt]);
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unset($this->_prepared_queries[(int)$stmt]);
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} else {
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return false;
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}
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return true;
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}
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// }}}
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// {{{ numRows()
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|
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/**
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* Gets the number of rows in a result set
|
|
*
|
|
* Only works if the DB_PORTABILITY_NUMROWS portability option
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* is turned on.
|
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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"
|
|
* because DB_result is a separate object.
|
|
*
|
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* @param resource $result PHP's query result resource
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*
|
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* @return int the number of rows. A DB_Error object on failure.
|
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*
|
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* @see DB_result::numRows(), DB_common::setOption()
|
|
*/
|
|
public function numRows($result)
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{
|
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// emulate numRows for Oracle. yuck.
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if ($this->options['portability'] & DB_PORTABILITY_NUMROWS &&
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$result === $this->last_stmt) {
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$countquery = 'SELECT COUNT(*) FROM ('.$this->last_query.')';
|
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$save_query = $this->last_query;
|
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$save_stmt = $this->last_stmt;
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$count = $this->query($countquery);
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|
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// Restore the last query and statement.
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$this->last_query = $save_query;
|
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$this->last_stmt = $save_stmt;
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if (DB::isError($count) ||
|
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DB::isError($row = $count->fetchRow(DB_FETCHMODE_ORDERED))) {
|
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return $this->raiseError(DB_ERROR_NOT_CAPABLE);
|
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}
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return $row[0];
|
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}
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return $this->raiseError(DB_ERROR_NOT_CAPABLE);
|
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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
|
|
*
|
|
* This method is not meant to be called directly. Use
|
|
* DB_result::numCols() instead. It can't be declared "protected"
|
|
* because DB_result is a separate object.
|
|
*
|
|
* @param resource $result PHP's query result resource
|
|
*
|
|
* @return int the number of columns. A DB_Error object on failure.
|
|
*
|
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* @see DB_result::numCols()
|
|
*/
|
|
public function numCols($result)
|
|
{
|
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$cols = @OCINumCols($result);
|
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if (!$cols) {
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return $this->oci8RaiseError($result);
|
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}
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return $cols;
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}
|
|
|
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// }}}
|
|
// {{{ prepare()
|
|
|
|
/**
|
|
* Prepares a query for multiple execution with execute().
|
|
*
|
|
* With oci8, this is emulated.
|
|
*
|
|
* prepare() requires a generic query as string like <code>
|
|
* INSERT INTO numbers VALUES (?, ?, ?)
|
|
* </code>. The <kbd>?</kbd> characters are placeholders.
|
|
*
|
|
* Three types of placeholders can be used:
|
|
* + <kbd>?</kbd> a quoted scalar value, i.e. strings, integers
|
|
* + <kbd>!</kbd> value is inserted 'as is'
|
|
* + <kbd>&</kbd> requires a file name. The file's contents get
|
|
* inserted into the query (i.e. saving binary
|
|
* data in a db)
|
|
*
|
|
* Use backslashes to escape placeholder characters if you don't want
|
|
* them to be interpreted as placeholders. Example: <code>
|
|
* "UPDATE foo SET col=? WHERE col='over \& under'"
|
|
* </code>
|
|
*
|
|
* @param string $query the query to be prepared
|
|
*
|
|
* @return mixed DB statement resource on success. DB_Error on failure.
|
|
*
|
|
* @see DB_oci8::execute()
|
|
*/
|
|
public function prepare($query)
|
|
{
|
|
$tokens = preg_split(
|
|
'/((?<!\\\)[&?!])/',
|
|
$query,
|
|
-1,
|
|
PREG_SPLIT_DELIM_CAPTURE
|
|
);
|
|
$binds = count($tokens) - 1;
|
|
$token = 0;
|
|
$types = array();
|
|
$newquery = '';
|
|
|
|
foreach ($tokens as $key => $val) {
|
|
switch ($val) {
|
|
case '?':
|
|
$types[$token++] = DB_PARAM_SCALAR;
|
|
unset($tokens[$key]);
|
|
break;
|
|
case '&':
|
|
$types[$token++] = DB_PARAM_OPAQUE;
|
|
unset($tokens[$key]);
|
|
break;
|
|
case '!':
|
|
$types[$token++] = DB_PARAM_MISC;
|
|
unset($tokens[$key]);
|
|
break;
|
|
default:
|
|
$tokens[$key] = preg_replace('/\\\([&?!])/', "\\1", $val);
|
|
if ($key != $binds) {
|
|
$newquery .= $tokens[$key] . ':bind' . $token;
|
|
} else {
|
|
$newquery .= $tokens[$key];
|
|
}
|
|
}
|
|
}
|
|
|
|
$this->last_query = $query;
|
|
$newquery = $this->modifyQuery($newquery);
|
|
if (!$stmt = @OCIParse($this->connection, $newquery)) {
|
|
return $this->oci8RaiseError();
|
|
}
|
|
$this->prepare_types[(int)$stmt] = $types;
|
|
$this->manip_query[(int)$stmt] = DB::isManip($query);
|
|
$this->_prepared_queries[(int)$stmt] = $newquery;
|
|
return $stmt;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ execute()
|
|
|
|
/**
|
|
* Executes a DB statement prepared with prepare().
|
|
*
|
|
* To determine how many rows of a result set get buffered using
|
|
* ocisetprefetch(), see the "result_buffering" option in setOptions().
|
|
* This option was added in Release 1.7.0.
|
|
*
|
|
* @param resource $stmt a DB statement resource returned from prepare()
|
|
* @param mixed $data array, string or numeric data to be used in
|
|
* execution of the statement. Quantity of items
|
|
* passed must match quantity of placeholders in
|
|
* query: meaning 1 for non-array items or the
|
|
* quantity of elements in the array.
|
|
*
|
|
* @return mixed returns an oic8 result resource for successful SELECT
|
|
* queries, DB_OK for other successful queries.
|
|
* A DB error object is returned on failure.
|
|
*
|
|
* @see DB_oci8::prepare()
|
|
*/
|
|
public function &execute($stmt, $data = array())
|
|
{
|
|
$data = (array)$data;
|
|
$this->last_parameters = $data;
|
|
$this->last_query = $this->_prepared_queries[(int)$stmt];
|
|
$this->_data = $data;
|
|
|
|
$types = $this->prepare_types[(int)$stmt];
|
|
if (count($types) != count($data)) {
|
|
$tmp = $this->raiseError(DB_ERROR_MISMATCH);
|
|
return $tmp;
|
|
}
|
|
|
|
$i = 0;
|
|
foreach ($data as $key => $value) {
|
|
if ($types[$i] == DB_PARAM_MISC) {
|
|
/*
|
|
* Oracle doesn't seem to have the ability to pass a
|
|
* parameter along unchanged, so strip off quotes from start
|
|
* and end, plus turn two single quotes to one single quote,
|
|
* in order to avoid the quotes getting escaped by
|
|
* Oracle and ending up in the database.
|
|
*/
|
|
$data[$key] = preg_replace("/^'(.*)'$/", "\\1", $data[$key]);
|
|
$data[$key] = str_replace("''", "'", $data[$key]);
|
|
} elseif ($types[$i] == DB_PARAM_OPAQUE) {
|
|
$fp = @fopen($data[$key], 'rb');
|
|
if (!$fp) {
|
|
$tmp = $this->raiseError(DB_ERROR_ACCESS_VIOLATION);
|
|
return $tmp;
|
|
}
|
|
$data[$key] = fread($fp, filesize($data[$key]));
|
|
fclose($fp);
|
|
} elseif ($types[$i] == DB_PARAM_SCALAR) {
|
|
// Floats have to be converted to a locale-neutral
|
|
// representation.
|
|
if (is_float($data[$key])) {
|
|
$data[$key] = $this->quoteFloat($data[$key]);
|
|
}
|
|
}
|
|
if (!@OCIBindByName($stmt, ':bind' . $i, $data[$key], -1)) {
|
|
$tmp = $this->oci8RaiseError($stmt);
|
|
return $tmp;
|
|
}
|
|
$this->last_query = preg_replace(
|
|
"/:bind$i(?!\d)/",
|
|
$this->quoteSmart($data[$key]),
|
|
$this->last_query,
|
|
1
|
|
);
|
|
$i++;
|
|
}
|
|
if ($this->autocommit) {
|
|
$success = @OCIExecute($stmt, OCI_COMMIT_ON_SUCCESS);
|
|
} else {
|
|
$success = @OCIExecute($stmt, OCI_DEFAULT);
|
|
}
|
|
if (!$success) {
|
|
$tmp = $this->oci8RaiseError($stmt);
|
|
return $tmp;
|
|
}
|
|
$this->last_stmt = $stmt;
|
|
if ($this->manip_query[(int)$stmt] || $this->_next_query_manip) {
|
|
$this->_last_query_manip = true;
|
|
$this->_next_query_manip = false;
|
|
$tmp = DB_OK;
|
|
} else {
|
|
$this->_last_query_manip = false;
|
|
@ocisetprefetch($stmt, $this->options['result_buffering']);
|
|
$tmp = new DB_result($this, $stmt);
|
|
}
|
|
return $tmp;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ autoCommit()
|
|
|
|
/**
|
|
* Enables or disables automatic commits
|
|
*
|
|
* @param bool $onoff true turns it on, false turns it off
|
|
*
|
|
* @return int DB_OK on success. A DB_Error object if the driver
|
|
* doesn't support auto-committing transactions.
|
|
*/
|
|
public function autoCommit($onoff = false)
|
|
{
|
|
$this->autocommit = (bool)$onoff;
|
|
;
|
|
return DB_OK;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ commit()
|
|
|
|
/**
|
|
* Commits the current transaction
|
|
*
|
|
* @return int DB_OK on success. A DB_Error object on failure.
|
|
*/
|
|
public function commit()
|
|
{
|
|
$result = @OCICommit($this->connection);
|
|
if (!$result) {
|
|
return $this->oci8RaiseError();
|
|
}
|
|
return DB_OK;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ rollback()
|
|
|
|
/**
|
|
* Reverts the current transaction
|
|
*
|
|
* @return int DB_OK on success. A DB_Error object on failure.
|
|
*/
|
|
public function rollback()
|
|
{
|
|
$result = @OCIRollback($this->connection);
|
|
if (!$result) {
|
|
return $this->oci8RaiseError();
|
|
}
|
|
return DB_OK;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ affectedRows()
|
|
|
|
/**
|
|
* Determines the number of rows affected by a data maniuplation query
|
|
*
|
|
* 0 is returned for queries that don't manipulate data.
|
|
*
|
|
* @return int the number of rows. A DB_Error object on failure.
|
|
*/
|
|
public function affectedRows()
|
|
{
|
|
if ($this->last_stmt === false) {
|
|
return $this->oci8RaiseError();
|
|
}
|
|
$result = @OCIRowCount($this->last_stmt);
|
|
if ($result === false) {
|
|
return $this->oci8RaiseError($this->last_stmt);
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ modifyQuery()
|
|
|
|
/**
|
|
* Changes a query string for various DBMS specific reasons
|
|
*
|
|
* "SELECT 2+2" must be "SELECT 2+2 FROM dual" in Oracle.
|
|
*
|
|
* @param string $query the query string to modify
|
|
*
|
|
* @return string the modified query string
|
|
*
|
|
* @access protected
|
|
*/
|
|
public function modifyQuery($query)
|
|
{
|
|
if (preg_match('/^\s*SELECT/i', $query) &&
|
|
!preg_match('/\sFROM\s/i', $query)) {
|
|
$query .= ' FROM dual';
|
|
}
|
|
return $query;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ modifyLimitQuery()
|
|
|
|
/**
|
|
* Adds LIMIT clauses to a query string according to current DBMS standards
|
|
*
|
|
* @param string $query the query to modify
|
|
* @param int $from the row to start to fetching (0 = the first row)
|
|
* @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, $params = array())
|
|
{
|
|
// Let Oracle return the name of the columns instead of
|
|
// coding a "home" SQL parser
|
|
|
|
if (count($params)) {
|
|
$result = $this->prepare("SELECT * FROM ($query) "
|
|
. 'WHERE NULL = NULL');
|
|
$tmp = $this->execute($result, $params);
|
|
} else {
|
|
$q_fields = "SELECT * FROM ($query) WHERE NULL = NULL";
|
|
|
|
if (!$result = @OCIParse($this->connection, $q_fields)) {
|
|
$this->last_query = $q_fields;
|
|
return $this->oci8RaiseError();
|
|
}
|
|
if (!@OCIExecute($result, OCI_DEFAULT)) {
|
|
$this->last_query = $q_fields;
|
|
return $this->oci8RaiseError($result);
|
|
}
|
|
}
|
|
|
|
$ncols = OCINumCols($result);
|
|
$cols = array();
|
|
for ($i = 1; $i <= $ncols; $i++) {
|
|
$cols[] = '"' . OCIColumnName($result, $i) . '"';
|
|
}
|
|
$fields = implode(', ', $cols);
|
|
// XXX Test that (tip by John Lim)
|
|
//if (preg_match('/^\s*SELECT\s+/is', $query, $match)) {
|
|
// // Introduce the FIRST_ROWS Oracle query optimizer
|
|
// $query = substr($query, strlen($match[0]), strlen($query));
|
|
// $query = "SELECT /* +FIRST_ROWS */ " . $query;
|
|
//}
|
|
|
|
// Construct the query
|
|
// more at: http://marc.theaimsgroup.com/?l=php-db&m=99831958101212&w=2
|
|
// Perhaps this could be optimized with the use of Unions
|
|
$query = "SELECT $fields FROM".
|
|
" (SELECT rownum as linenum, $fields FROM".
|
|
" ($query)".
|
|
' WHERE rownum <= '. ($from + $count) .
|
|
') WHERE linenum >= ' . ++$from;
|
|
return $query;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ nextId()
|
|
|
|
/**
|
|
* Returns the next free id in a sequence
|
|
*
|
|
* @param string $seq_name name of the sequence
|
|
* @param boolean $ondemand when true, the seqence is automatically
|
|
* created if it does not exist
|
|
*
|
|
* @return int the next id number in the sequence.
|
|
* A DB_Error object on failure.
|
|
*
|
|
* @see DB_common::nextID(), DB_common::getSequenceName(),
|
|
* DB_oci8::createSequence(), DB_oci8::dropSequence()
|
|
*/
|
|
public function nextId($seq_name, $ondemand = true)
|
|
{
|
|
$seqname = $this->getSequenceName($seq_name);
|
|
$repeat = 0;
|
|
do {
|
|
$this->expectError(DB_ERROR_NOSUCHTABLE);
|
|
$result = $this->query("SELECT ${seqname}.nextval FROM dual");
|
|
$this->popExpect();
|
|
if ($ondemand && DB::isError($result) &&
|
|
$result->getCode() == DB_ERROR_NOSUCHTABLE) {
|
|
$repeat = 1;
|
|
$result = $this->createSequence($seq_name);
|
|
if (DB::isError($result)) {
|
|
return $this->raiseError($result);
|
|
}
|
|
} else {
|
|
$repeat = 0;
|
|
}
|
|
} while ($repeat);
|
|
if (DB::isError($result)) {
|
|
return $this->raiseError($result);
|
|
}
|
|
$arr = $result->fetchRow(DB_FETCHMODE_ORDERED);
|
|
return $arr[0];
|
|
}
|
|
|
|
/**
|
|
* Creates a new sequence
|
|
*
|
|
* @param string $seq_name name of the new sequence
|
|
*
|
|
* @return int DB_OK on success. A DB_Error object on failure.
|
|
*
|
|
* @see DB_common::createSequence(), DB_common::getSequenceName(),
|
|
* DB_oci8::nextID(), DB_oci8::dropSequence()
|
|
*/
|
|
public function createSequence($seq_name)
|
|
{
|
|
return $this->query('CREATE SEQUENCE '
|
|
. $this->getSequenceName($seq_name));
|
|
}
|
|
|
|
// }}}
|
|
// {{{ dropSequence()
|
|
|
|
/**
|
|
* Deletes a sequence
|
|
*
|
|
* @param string $seq_name name of the sequence to be deleted
|
|
*
|
|
* @return int DB_OK on success. A DB_Error object on failure.
|
|
*
|
|
* @see DB_common::dropSequence(), DB_common::getSequenceName(),
|
|
* DB_oci8::nextID(), DB_oci8::createSequence()
|
|
*/
|
|
public function dropSequence($seq_name)
|
|
{
|
|
return $this->query('DROP SEQUENCE '
|
|
. $this->getSequenceName($seq_name));
|
|
}
|
|
|
|
// }}}
|
|
// {{{ oci8RaiseError()
|
|
|
|
/**
|
|
* Produces a DB_Error object regarding the current problem
|
|
*
|
|
* @param int $errno if the error is being manually raised pass a
|
|
* DB_ERROR* constant here. If this isn't passed
|
|
* the error information gathered from the DBMS.
|
|
*
|
|
* @return object the DB_Error object
|
|
*
|
|
* @see DB_common::raiseError(),
|
|
* DB_oci8::errorNative(), DB_oci8::errorCode()
|
|
*/
|
|
public function oci8RaiseError($errno = null)
|
|
{
|
|
if ($errno === null) {
|
|
$error = @OCIError($this->connection);
|
|
return $this->raiseError(
|
|
$this->errorCode($error['code']),
|
|
null,
|
|
null,
|
|
null,
|
|
$error['message']
|
|
);
|
|
} elseif (is_resource($errno)) {
|
|
$error = @OCIError($errno);
|
|
return $this->raiseError(
|
|
$this->errorCode($error['code']),
|
|
null,
|
|
null,
|
|
null,
|
|
$error['message']
|
|
);
|
|
}
|
|
return $this->raiseError($this->errorCode($errno));
|
|
}
|
|
|
|
// }}}
|
|
// {{{ errorNative()
|
|
|
|
/**
|
|
* Gets the DBMS' native error code produced by the last query
|
|
*
|
|
* @return int the DBMS' error code. FALSE if the code could not be
|
|
* determined
|
|
*/
|
|
public function errorNative()
|
|
{
|
|
if (is_resource($this->last_stmt)) {
|
|
$error = @OCIError($this->last_stmt);
|
|
} else {
|
|
$error = @OCIError($this->connection);
|
|
}
|
|
if (is_array($error)) {
|
|
return $error['code'];
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ tableInfo()
|
|
|
|
/**
|
|
* Returns information about a table or a result set
|
|
*
|
|
* NOTE: only supports 'table' and 'flags' if <var>$result</var>
|
|
* is a table name.
|
|
*
|
|
* NOTE: flags won't contain index information.
|
|
*
|
|
* @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 $mode a valid tableInfo mode
|
|
*
|
|
* @return array an associative array with the information requested.
|
|
* A DB_Error object on failure.
|
|
*
|
|
* @see DB_common::tableInfo()
|
|
*/
|
|
public function tableInfo($result, $mode = null)
|
|
{
|
|
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
|
|
$case_func = 'strtolower';
|
|
} else {
|
|
$case_func = 'strval';
|
|
}
|
|
|
|
$res = array();
|
|
|
|
if (is_string($result)) {
|
|
/*
|
|
* Probably received a table name.
|
|
* Create a result resource identifier.
|
|
*/
|
|
$result = strtoupper($result);
|
|
$q_fields = 'SELECT column_name, data_type, data_length, '
|
|
. 'nullable '
|
|
. 'FROM user_tab_columns '
|
|
. "WHERE table_name='$result' ORDER BY column_id";
|
|
|
|
$this->last_query = $q_fields;
|
|
|
|
if (!$stmt = @OCIParse($this->connection, $q_fields)) {
|
|
return $this->oci8RaiseError(DB_ERROR_NEED_MORE_DATA);
|
|
}
|
|
if (!@OCIExecute($stmt, OCI_DEFAULT)) {
|
|
return $this->oci8RaiseError($stmt);
|
|
}
|
|
|
|
$i = 0;
|
|
while (@OCIFetch($stmt)) {
|
|
$res[$i] = array(
|
|
'table' => $case_func($result),
|
|
'name' => $case_func(@OCIResult($stmt, 1)),
|
|
'type' => @OCIResult($stmt, 2),
|
|
'len' => @OCIResult($stmt, 3),
|
|
'flags' => (@OCIResult($stmt, 4) == 'N') ? 'not_null' : '',
|
|
);
|
|
if ($mode & DB_TABLEINFO_ORDER) {
|
|
$res['order'][$res[$i]['name']] = $i;
|
|
}
|
|
if ($mode & DB_TABLEINFO_ORDERTABLE) {
|
|
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
|
|
}
|
|
$i++;
|
|
}
|
|
|
|
if ($mode) {
|
|
$res['num_fields'] = $i;
|
|
}
|
|
@OCIFreeStatement($stmt);
|
|
} else {
|
|
if (isset($result->result)) {
|
|
/*
|
|
* Probably received a result object.
|
|
* Extract the result resource identifier.
|
|
*/
|
|
$result = $result->result;
|
|
}
|
|
|
|
$res = array();
|
|
|
|
if ($result === $this->last_stmt) {
|
|
$count = @OCINumCols($result);
|
|
if ($mode) {
|
|
$res['num_fields'] = $count;
|
|
}
|
|
for ($i = 0; $i < $count; $i++) {
|
|
$res[$i] = array(
|
|
'table' => '',
|
|
'name' => $case_func(@OCIColumnName($result, $i+1)),
|
|
'type' => @OCIColumnType($result, $i+1),
|
|
'len' => @OCIColumnSize($result, $i+1),
|
|
'flags' => '',
|
|
);
|
|
if ($mode & DB_TABLEINFO_ORDER) {
|
|
$res['order'][$res[$i]['name']] = $i;
|
|
}
|
|
if ($mode & DB_TABLEINFO_ORDERTABLE) {
|
|
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
|
|
}
|
|
}
|
|
} else {
|
|
return $this->raiseError(DB_ERROR_NOT_CAPABLE);
|
|
}
|
|
}
|
|
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 ($type) {
|
|
case 'tables':
|
|
return 'SELECT table_name FROM user_tables';
|
|
case 'synonyms':
|
|
return 'SELECT synonym_name FROM user_synonyms';
|
|
case 'views':
|
|
return 'SELECT view_name FROM user_views';
|
|
default:
|
|
return null;
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ quoteFloat()
|
|
|
|
/**
|
|
* Formats a float value for use within a query in a locale-independent
|
|
* manner.
|
|
*
|
|
* @param float the float value to be quoted.
|
|
* @return string the quoted string.
|
|
* @see DB_common::quoteSmart()
|
|
* @since Method available since release 1.7.8.
|
|
*/
|
|
public function quoteFloat($float)
|
|
{
|
|
return $this->escapeSimple(str_replace(',', '.', strval(floatval($float))));
|
|
}
|
|
|
|
// }}}
|
|
}
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* End:
|
|
*/
|