oci8.php

FP2 CRM code+Mysql DB

<?php

/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */

/**
 * The PEAR DB driver for PHP's oci8 extension
 * for interacting with Oracle databases
 *
 * PHP versions 4 and 5
 *
 * LICENSE: This source file is subject to version 3.0 of the PHP license
 * that is available through the world-wide-web at the following URI:
 * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
 * the PHP License and are unable to obtain it through the web, please
 * send a note to [e-mail] so we can mail you a copy immediately.
 *
 * @category   Database
 * @package    DB
 * @author     James L. Pine <[e-mail]>
 * @author     Daniel Convissor <[e-mail]>
 * @copyright  1997-2005 The PHP Group
 * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
 * @version    CVS: $Id: oci8.php,v 1.103 2005/04/11 15:10:22 danielc Exp $
 * @link       http://pear.php.net/package/DB
 */

/**
 * Obtain the DB_common class so it can be extended from
 */
require_once 'DB/common.php';

/**
 * The methods PEAR DB uses to interact with PHP's oci8 extension
 * for interacting with Oracle databases
 *
 * Definitely works with versions 8 and 9 of Oracle.
 *
 * These methods overload the ones declared in DB_common.
 *
 * Be aware...  OCIError() only appears to return anything when given a
 * statement, so functions return the generic DB_ERROR instead of more
 * useful errors that have to do with feedback from the database.
 *
 * @category   Database
 * @package    DB
 * @author     James L. Pine <[e-mail]>
 * @author     Daniel Convissor <[e-mail]>
 * @copyright  1997-2005 The PHP Group
 * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
 * @version    Release: 1.7.6
 * @link       http://pear.php.net/package/DB
 */
class DB_oci8 extends DB_common
{
    // {{{ properties

    /**
     * The DB driver type (mysql, oci8, odbc, etc.)
     * @var string
     */
    var $phptype = 'oci8';

    /**
     * The database syntax variant to be used (db2, access, etc.), if any
     * @var string
     */
    var $dbsyntax = 'oci8';

    /**
     * The capabilities of this DB implementation
     *
     * The 'new_link' element contains the PHP version that first provided
     * new_link support for this DBMS.  Contains false if it's unsupported.
     *
     * Meaning of the 'limit' element:
     *   + 'emulate' = emulate with fetch row by number
     *   + 'alter'   = alter the query
     *   + false     = skip rows
     *
     * @var array
     */
    var $features = array(
        'limit'         => 'alter',
        'new_link'      => '5.0.0',
        'numrows'       => 'subquery',
        'pconnect'      => true,
        'prepare'       => true,
        'ssl'           => false,
        'transactions'  => true,
    );

    /**
     * A mapping of native error codes to DB error codes
     * @var array
     */
    var $errorcode_map = array(
        1    => DB_ERROR_CONSTRAINT,
        900  => DB_ERROR_SYNTAX,
        904  => DB_ERROR_NOSUCHFIELD,
        913  => DB_ERROR_VALUE_COUNT_ON_ROW,
        921  => DB_ERROR_SYNTAX,
        923  => DB_ERROR_SYNTAX,
        942  => DB_ERROR_NOSUCHTABLE,
        955  => DB_ERROR_ALREADY_EXISTS,
        1400 => DB_ERROR_CONSTRAINT_NOT_NULL,
        1401 => DB_ERROR_INVALID,
        1407 => DB_ERROR_CONSTRAINT_NOT_NULL,
        1418 => DB_ERROR_NOT_FOUND,
        1476 => DB_ERROR_DIVZERO,
        1722 => DB_ERROR_INVALID_NUMBER,
        2289 => DB_ERROR_NOSUCHTABLE,
        2291 => DB_ERROR_CONSTRAINT,
        2292 => DB_ERROR_CONSTRAINT,
        2449 => DB_ERROR_CONSTRAINT,
    );

    /**
     * The raw database connection created by PHP
     * @var resource
     */
    var $connection;

    /**
     * The DSN information for connecting to a database
     * @var array
     */
    var $dsn = array();


    /**
     * Should data manipulation queries be committed automatically?
     * @var bool
     * @access private
     */
    var $autocommit = true;

    /**
     * Stores the $data passed to execute() in the oci8 driver
     *
     * Gets reset to array() when simpleQuery() is run.
     *
     * Needed in case user wants to call numRows() after prepare/execute
     * was used.
     *
     * @var array
     * @access private
     */
    var $_data = array();

    /**
     * The result or statement handle from the most recently executed query
     * @var resource
     */
    var $last_stmt;

    /**
     * Is the given prepared statement a data manipulation query?
     * @var array
     * @access private
     */
    var $manip_query = array();


    // }}}
    // {{{ constructor

    /**
     * This constructor calls <kbd>$this->DB_common()</kbd>
     *
     * @return void
     */
    function DB_oci8()
    {
        $this->DB_common();
    }

    // }}}
    // {{{ connect()

    /**
     * Connect to the database server, log in and open the database
     *
     * Don't call this method directly.  Use DB::connect() instead.
     *
     * If PHP is at version 5.0.0 or greater:
     *   + Generally, oci_connect() or oci_pconnect() are used.
     *   + But if the new_link DSN option is set to true, oci_new_connect()
     *     is used.
     *
     * When using PHP version 4.x, OCILogon() or OCIPLogon() are used.
     *
     * PEAR DB's oci8 driver supports the following extra DSN options:
     *   + charset       The character set to be used on the connection.
     *                    Only used if PHP is at version 5.0.0 or greater
     *                    and the Oracle server is at 9.2 or greater.
     *                    Available since PEAR DB 1.7.0.
     *   + new_link      If set to true, causes subsequent calls to
     *                    connect() to return a new connection link
     *                    instead of the existing one.  WARNING: this is
     *                    not portable to other DBMS's.
     *                    Available since PEAR DB 1.7.0.
     *
     * @param array $dsn         the data source name
     * @param bool  $persistent  should the connection be persistent?
     *
     * @return int  DB_OK on success. A DB_Error object on failure.
     */
    function connect($dsn, $persistent = false)
    {
        if (!PEAR::loadExtension('oci8')) {
            return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
        }

        $this->dsn = $dsn;
        if ($dsn['dbsyntax']) {
            $this->dbsyntax = $dsn['dbsyntax'];
        }

        if (function_exists('oci_connect')) {
            if (isset($dsn['new_link'])
                && ($dsn['new_link'] == 'true' || $dsn['new_link'] === true))
            {
                $connect_function = 'oci_new_connect';
            } else {
                $connect_function = $persistent ? 'oci_pconnect'
                                    : 'oci_connect';
            }

            // Backwards compatibility with DB < 1.7.0
            if (empty($dsn['database']) && !empty($dsn['hostspec'])) {
                $db = $dsn['hostspec'];
            } else {
                $db = $dsn['database'];
            }

            $char = empty($dsn['charset']) ? null : $dsn['charset'];
            $this->connection = @$connect_function($dsn['username'],
                                                   $dsn['password'],
                                                   $db,
                                                   $char);
            $error = OCIError();
            if (!empty($error) && $error['code'] == 12541) {
                // Couldn't find TNS listener.  Try direct connection.
                $this->connection = @$connect_function($dsn['username'],
                                                       $dsn['password'],
                                                       null,
                                                       $char);
            }
        } else {
            $connect_function = $persistent ? 'OCIPLogon' : 'OCILogon';
            if ($dsn['hostspec']) {
                $this->connection = @$connect_function($dsn['username'],
                                                       $dsn['password'],
                                                       $dsn['hostspec']);
            } elseif ($dsn['username'] || $dsn['password']) {
                $this->connection = @$connect_function($dsn['username'],
                                                       $dsn['password']);
            }
        }

        if (!$this->connection) {
            $error = OCIError();
            $error = (is_array($error)) ? $error['message'] : null;
            return $this->raiseError(DB_ERROR_CONNECT_FAILED,
                                     null, null, null,
                                     $error);
        }
        return DB_OK;
    }

    // }}}
    // {{{ disconnect()

    /**
     * Disconnects from the database server
     *
     * @return bool  TRUE on success, FALSE on failure
     */
    function disconnect()
    {
        if (function_exists('oci_close')) {
            $ret = @oci_close($this->connection);
        } else {
            $ret = @OCILogOff($this->connection);
        }
        $this->connection = null;
        return $ret;
    }

    // }}}
    // {{{ simpleQuery()

    /**
     * Sends a query to the database server
     *
     * 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 string  the SQL query string
     *
     * @return mixed  + a PHP result resrouce for successful SELECT queries
     *                + the DB_OK constant for other successful queries
     *                + a DB_Error object on failure
     */
    function simpleQuery($query)
    {
        $this->_data = array();
        $this->last_parameters = array();
        $this->last_query = $query;
        $query = $this->modifyQuery($query);
        $result = @OCIParse($this->connection, $query);
        if (!$result) {
            return $this->oci8RaiseError();
        }
        if ($this->autocommit) {
            $success = @OCIExecute($result,OCI_COMMIT_ON_SUCCESS);
        } else {
            $success = @OCIExecute($result,OCI_DEFAULT);
        }
        if (!$success) {
            return $this->oci8RaiseError($result);
        }
        $this->last_stmt = $result;
        if (DB::isManip($query)) {
            return DB_OK;
        } else {
            @ocisetprefetch($result, $this->options['result_buffering']);
            return $result;
        }
    }

    // }}}
    // {{{ nextResult()

    /**
     * Move the internal oracle result pointer to the next available result
     *
     * @param a valid oci8 result resource
     *
     * @access public
     *
     * @return true if a result is available otherwise return false
     */
    function nextResult($result)
    {
        return false;
    }

    // }}}
    // {{{ fetchInto()

    /**
     * Places a row from the result set into the given array
     *
     * Formating of the array and the data therein are configurable.
     * See DB_result::fetchInto() for more information.
     *
     * This method is not meant to be called directly.  Use
     * DB_result::fetchInto() instead.  It can't be declared "protected"
     * because DB_result is a separate object.
     *
     * @param resource $result    the query result resource
     * @param array    $arr       the referenced array to put the data in
     * @param int      $fetchmode how the resulting array should be indexed
     * @param int      $rownum    the row number to fetch (0 = first row)
     *
     * @return mixed  DB_OK on success, NULL when the end of a result set is
     *                 reached or on failure
     *
     * @see DB_result::fetchInto()
     */
    function fetchInto($result, &$arr, $fetchmode, $rownum = null)