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nextcloud/3rdparty/MDB2/Driver/oci8.php

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add oci8 to MDB2
2012-07-19 14:10:51 +04:00
<?php
// vim: set et ts=4 sw=4 fdm=marker:
// +----------------------------------------------------------------------+
// | PHP versions 4 and 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox, |
// | Stig. S. Bakken, Lukas Smith |
// | All rights reserved. |
// +----------------------------------------------------------------------+
// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
// | API as well as database abstraction for PHP applications. |
// | This LICENSE is in the BSD license style. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | |
// | Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution. |
// | |
// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
// | Lukas Smith nor the names of his contributors may be used to endorse |
// | or promote products derived from this software without specific prior|
// | written permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
// | POSSIBILITY OF SUCH DAMAGE. |
// +----------------------------------------------------------------------+
// | Author: Lukas Smith <smith@pooteeweet.org> |
// +----------------------------------------------------------------------+
// $Id: oci8.php 295587 2010-02-28 17:16:38Z quipo $
/**
* MDB2 OCI8 driver
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
*/
class MDB2_Driver_oci8 extends MDB2_Driver_Common
{
// {{{ properties
var $string_quoting = array('start' => "'", 'end' => "'", 'escape' => "'", 'escape_pattern' => '@');
var $identifier_quoting = array('start' => '"', 'end' => '"', 'escape' => '"');
var $uncommitedqueries = 0;
// }}}
// {{{ constructor
/**
* Constructor
*/
function __construct()
{
parent::__construct();
$this->phptype = 'oci8';
$this->dbsyntax = 'oci8';
$this->supported['sequences'] = true;
$this->supported['indexes'] = true;
$this->supported['summary_functions'] = true;
$this->supported['order_by_text'] = true;
$this->supported['current_id'] = true;
$this->supported['affected_rows'] = true;
$this->supported['transactions'] = true;
$this->supported['savepoints'] = true;
$this->supported['limit_queries'] = true;
$this->supported['LOBs'] = true;
$this->supported['replace'] = 'emulated';
$this->supported['sub_selects'] = true;
$this->supported['triggers'] = true;
$this->supported['auto_increment'] = false; // implementation is broken
$this->supported['primary_key'] = true;
$this->supported['result_introspection'] = true;
$this->supported['prepared_statements'] = true;
$this->supported['identifier_quoting'] = true;
$this->supported['pattern_escaping'] = true;
$this->supported['new_link'] = true;
$this->options['DBA_username'] = false;
$this->options['DBA_password'] = false;
$this->options['database_name_prefix'] = false;
$this->options['emulate_database'] = true;
$this->options['default_tablespace'] = false;
$this->options['default_text_field_length'] = 2000;
$this->options['lob_allow_url_include'] = false;
$this->options['result_prefetching'] = false;
$this->options['max_identifiers_length'] = 30;
}
// }}}
// {{{ errorInfo()
/**
* This method is used to collect information about an error
*
* @param integer $error
* @return array
* @access public
*/
function errorInfo($error = null)
{
if (is_resource($error)) {
$error_data = @OCIError($error);
$error = null;
} elseif ($this->connection) {
$error_data = @OCIError($this->connection);
} else {
$error_data = @OCIError();
}
$native_code = $error_data['code'];
$native_msg = $error_data['message'];
if (null === $error) {
static $ecode_map;
if (empty($ecode_map)) {
$ecode_map = array(
1 => MDB2_ERROR_CONSTRAINT,
900 => MDB2_ERROR_SYNTAX,
904 => MDB2_ERROR_NOSUCHFIELD,
911 => MDB2_ERROR_SYNTAX, //invalid character
913 => MDB2_ERROR_VALUE_COUNT_ON_ROW,
921 => MDB2_ERROR_SYNTAX,
923 => MDB2_ERROR_SYNTAX,
942 => MDB2_ERROR_NOSUCHTABLE,
955 => MDB2_ERROR_ALREADY_EXISTS,
1400 => MDB2_ERROR_CONSTRAINT_NOT_NULL,
1401 => MDB2_ERROR_INVALID,
1407 => MDB2_ERROR_CONSTRAINT_NOT_NULL,
1418 => MDB2_ERROR_NOT_FOUND,
1435 => MDB2_ERROR_NOT_FOUND,
1476 => MDB2_ERROR_DIVZERO,
1722 => MDB2_ERROR_INVALID_NUMBER,
2289 => MDB2_ERROR_NOSUCHTABLE,
2291 => MDB2_ERROR_CONSTRAINT,
2292 => MDB2_ERROR_CONSTRAINT,
2449 => MDB2_ERROR_CONSTRAINT,
4081 => MDB2_ERROR_ALREADY_EXISTS, //trigger already exists
24344 => MDB2_ERROR_SYNTAX, //success with compilation error
);
}
if (isset($ecode_map[$native_code])) {
$error = $ecode_map[$native_code];
}
}
return array($error, $native_code, $native_msg);
}
// }}}
// {{{ beginTransaction()
/**
* Start a transaction or set a savepoint.
*
* @param string name of a savepoint to set
* @return mixed MDB2_OK on success, a MDB2 error on failure
*
* @access public
*/
function beginTransaction($savepoint = null)
{
$this->debug('Starting transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
if (null !== $savepoint) {
if (!$this->in_transaction) {
return $this->raiseError(MDB2_ERROR_INVALID, null, null,
'savepoint cannot be released when changes are auto committed', __FUNCTION__);
}
$query = 'SAVEPOINT '.$savepoint;
return $this->_doQuery($query, true);
}
if ($this->in_transaction) {
return MDB2_OK; //nothing to do
}
if (!$this->destructor_registered && $this->opened_persistent) {
$this->destructor_registered = true;
register_shutdown_function('MDB2_closeOpenTransactions');
}
$this->in_transaction = true;
++$this->uncommitedqueries;
return MDB2_OK;
}
// }}}
// {{{ commit()
/**
* Commit the database changes done during a transaction that is in
* progress or release a savepoint. This function may only be called when
* auto-committing is disabled, otherwise it will fail. Therefore, a new
* transaction is implicitly started after committing the pending changes.
*
* @param string name of a savepoint to release
* @return mixed MDB2_OK on success, a MDB2 error on failure
*
* @access public
*/
function commit($savepoint = null)
{
$this->debug('Committing transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
if (!$this->in_transaction) {
return $this->raiseError(MDB2_ERROR_INVALID, null, null,
'commit/release savepoint cannot be done changes are auto committed', __FUNCTION__);
}
if (null !== $savepoint) {
return MDB2_OK;
}
if ($this->uncommitedqueries) {
$connection = $this->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
if (!@OCICommit($connection)) {
return $this->raiseError(null, null, null,
'Unable to commit transaction', __FUNCTION__);
}
$this->uncommitedqueries = 0;
}
$this->in_transaction = false;
return MDB2_OK;
}
// }}}
// {{{ rollback()
/**
* Cancel any database changes done during a transaction or since a specific
* savepoint that is in progress. This function may only be called when
* auto-committing is disabled, otherwise it will fail. Therefore, a new
* transaction is implicitly started after canceling the pending changes.
*
* @param string name of a savepoint to rollback to
* @return mixed MDB2_OK on success, a MDB2 error on failure
*
* @access public
*/
function rollback($savepoint = null)
{
$this->debug('Rolling back transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
if (!$this->in_transaction) {
return $this->raiseError(MDB2_ERROR_INVALID, null, null,
'rollback cannot be done changes are auto committed', __FUNCTION__);
}
if (null !== $savepoint) {
$query = 'ROLLBACK TO SAVEPOINT '.$savepoint;
return $this->_doQuery($query, true);
}
if ($this->uncommitedqueries) {
$connection = $this->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
if (!@OCIRollback($connection)) {
return $this->raiseError(null, null, null,
'Unable to rollback transaction', __FUNCTION__);
}
$this->uncommitedqueries = 0;
}
$this->in_transaction = false;
return MDB2_OK;
}
// }}}
// {{{ function setTransactionIsolation()
/**
* Set the transacton isolation level.
*
* @param string standard isolation level
* READ UNCOMMITTED (allows dirty reads)
* READ COMMITTED (prevents dirty reads)
* REPEATABLE READ (prevents nonrepeatable reads)
* SERIALIZABLE (prevents phantom reads)
* @param array some transaction options:
* 'wait' => 'WAIT' | 'NO WAIT'
* 'rw' => 'READ WRITE' | 'READ ONLY'
*
* @return mixed MDB2_OK on success, a MDB2 error on failure
*
* @access public
* @since 2.1.1
*/
function setTransactionIsolation($isolation, $options = array())
{
$this->debug('Setting transaction isolation level', __FUNCTION__, array('is_manip' => true));
switch ($isolation) {
case 'READ UNCOMMITTED':
$isolation = 'READ COMMITTED';
case 'READ COMMITTED':
case 'REPEATABLE READ':
$isolation = 'SERIALIZABLE';
case 'SERIALIZABLE':
break;
default:
return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'isolation level is not supported: '.$isolation, __FUNCTION__);
}
$query = "ALTER SESSION ISOLATION LEVEL $isolation";
return $this->_doQuery($query, true);
}
// }}}
// {{{ _doConnect()
/**
* do the grunt work of the connect
*
* @return connection on success or MDB2 Error Object on failure
* @access protected
*/
function _doConnect($username, $password, $persistent = false)
{
if (!PEAR::loadExtension($this->phptype)) {
return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
'extension '.$this->phptype.' is not compiled into PHP', __FUNCTION__);
}
$sid = '';
if (!empty($this->dsn['service']) && $this->dsn['hostspec']) {
//oci8://username:password@foo.example.com[:port]/?service=service
// service name is given, it is assumed that hostspec is really a
// hostname, we try to construct an oracle connection string from this
$port = $this->dsn['port'] ? $this->dsn['port'] : 1521;
$sid = sprintf("(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)
(HOST=%s) (PORT=%s)))
(CONNECT_DATA=(SERVICE_NAME=%s)))",
$this->dsn['hostspec'],
$port,
$this->dsn['service']
);
} elseif ($this->dsn['hostspec']) {
// we are given something like 'oci8://username:password@foo/'
// we have hostspec but not a service name, now we assume that
// hostspec is a tnsname defined in tnsnames.ora
$sid = $this->dsn['hostspec'];
if (isset($this->dsn['port']) && $this->dsn['port']) {
$sid = $sid.':'.$this->dsn['port'];
}
} else {
// oci://username:password@
// if everything fails, we have to rely on environment variables
// not before a check to 'emulate_database'
if (!$this->options['emulate_database'] && $this->database_name) {
$sid = $this->database_name;
} elseif (getenv('ORACLE_SID')) {
$sid = getenv('ORACLE_SID');
} elseif ($sid = getenv('TWO_TASK')) {
$sid = getenv('TWO_TASK');
} else {
return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
'not a valid connection string or environment variable [ORACLE_SID|TWO_TASK] not set',
__FUNCTION__);
}
}
if (function_exists('oci_connect')) {
if ($this->_isNewLinkSet()) {
$connect_function = 'oci_new_connect';
} else {
$connect_function = $persistent ? 'oci_pconnect' : 'oci_connect';
}
$charset = empty($this->dsn['charset']) ? null : $this->dsn['charset'];
$session_mode = empty($this->dsn['session_mode']) ? null : $this->dsn['session_mode'];
$connection = @$connect_function($username, $password, $sid, $charset, $session_mode);
$error = @OCIError();
if (isset($error['code']) && $error['code'] == 12541) {
// Couldn't find TNS listener. Try direct connection.
$connection = @$connect_function($username, $password, null, $charset);
}
} else {
$connect_function = $persistent ? 'OCIPLogon' : 'OCILogon';
$connection = @$connect_function($username, $password, $sid);
if (!empty($this->dsn['charset'])) {
$result = $this->setCharset($this->dsn['charset'], $connection);
if (PEAR::isError($result)) {
return $result;
}
}
}
if (!$connection) {
return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
'unable to establish a connection', __FUNCTION__);
}
if (empty($this->dsn['disable_iso_date'])) {
$query = "ALTER SESSION SET NLS_DATE_FORMAT='YYYY-MM-DD HH24:MI:SS'";
$err =& $this->_doQuery($query, true, $connection);
if (PEAR::isError($err)) {
$this->disconnect(false);
return $err;
}
}
$query = "ALTER SESSION SET NLS_NUMERIC_CHARACTERS='. '";
$err =& $this->_doQuery($query, true, $connection);
if (PEAR::isError($err)) {
$this->disconnect(false);
return $err;
}
return $connection;
}
// }}}
// {{{ connect()
/**
* Connect to the database
*
* @return MDB2_OK on success, MDB2 Error Object on failure
* @access public
*/
function connect()
{
if (is_resource($this->connection)) {
//if (count(array_diff($this->connected_dsn, $this->dsn)) == 0
if (MDB2::areEquals($this->connected_dsn, $this->dsn)
&& $this->opened_persistent == $this->options['persistent']
) {
return MDB2_OK;
}
$this->disconnect(false);
}
if ($this->database_name && $this->options['emulate_database']) {
$this->dsn['username'] = $this->options['database_name_prefix'].$this->database_name;
}
$connection = $this->_doConnect($this->dsn['username'],
$this->dsn['password'],
$this->options['persistent']);
if (PEAR::isError($connection)) {
return $connection;
}
$this->connection = $connection;
$this->connected_dsn = $this->dsn;
$this->connected_database_name = '';
$this->opened_persistent = $this->options['persistent'];
$this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
if ($this->database_name) {
if ($this->database_name != $this->connected_database_name) {
$query = 'ALTER SESSION SET CURRENT_SCHEMA = "' .strtoupper($this->database_name) .'"';
$result = $this->_doQuery($query);
if (PEAR::isError($result)) {
$err = $this->raiseError($result, null, null,
'Could not select the database: '.$this->database_name, __FUNCTION__);
return $err;
}
$this->connected_database_name = $this->database_name;
}
}
$this->as_keyword = ' ';
$server_info = $this->getServerVersion();
if (is_array($server_info)) {
if ($server_info['major'] >= '10') {
$this->as_keyword = ' AS ';
}
}
return MDB2_OK;
}
// }}}
// {{{ databaseExists()
/**
* check if given database name is exists?
*
* @param string $name name of the database that should be checked
*
* @return mixed true/false on success, a MDB2 error on failure
* @access public
*/
function databaseExists($name)
{
$connection = $this->_doConnect($this->dsn['username'],
$this->dsn['password'],
$this->options['persistent']);
if (PEAR::isError($connection)) {
return $connection;
}
$query = 'ALTER SESSION SET CURRENT_SCHEMA = "' .strtoupper($name) .'"';
$result = $this->_doQuery($query, true, $connection, false);
if (PEAR::isError($result)) {
if (!MDB2::isError($result, MDB2_ERROR_NOT_FOUND)) {
return $result;
}
return false;
}
return true;
}
// }}}
// {{{ disconnect()
/**
* Log out and disconnect from the database.
*
* @param boolean $force if the disconnect should be forced even if the
* connection is opened persistently
* @return mixed true on success, false if not connected and error
* object on error
* @access public
*/
function disconnect($force = true)
{
if (is_resource($this->connection)) {
if ($this->in_transaction) {
$dsn = $this->dsn;
$database_name = $this->database_name;
$persistent = $this->options['persistent'];
$this->dsn = $this->connected_dsn;
$this->database_name = $this->connected_database_name;
$this->options['persistent'] = $this->opened_persistent;
$this->rollback();
$this->dsn = $dsn;
$this->database_name = $database_name;
$this->options['persistent'] = $persistent;
}
if (!$this->opened_persistent || $force) {
$ok = false;
if (function_exists('oci_close')) {
$ok = @oci_close($this->connection);
} else {
$ok = @OCILogOff($this->connection);
}
if (!$ok) {
return $this->raiseError(MDB2_ERROR_DISCONNECT_FAILED,
null, null, null, __FUNCTION__);
}
}
$this->uncommitedqueries = 0;
} else {
return false;
}
return parent::disconnect($force);
}
// }}}
// {{{ standaloneQuery()
/**
* execute a query as DBA
*
* @param string $query the SQL query
* @param mixed $types array containing the types of the columns in
* the result set
* @param boolean $is_manip if the query is a manipulation query
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function standaloneQuery($query, $types = null, $is_manip = false)
{
$user = $this->options['DBA_username']? $this->options['DBA_username'] : $this->dsn['username'];
$pass = $this->options['DBA_password']? $this->options['DBA_password'] : $this->dsn['password'];
$connection = $this->_doConnect($user, $pass, $this->options['persistent']);
if (PEAR::isError($connection)) {
return $connection;
}
$offset = $this->offset;
$limit = $this->limit;
$this->offset = $this->limit = 0;
$query = $this->_modifyQuery($query, $is_manip, $limit, $offset);
$result = $this->_doQuery($query, $is_manip, $connection, false);
if (!PEAR::isError($result)) {
if ($is_manip) {
$result = $this->_affectedRows($connection, $result);
} else {
$result = $this->_wrapResult($result, $types, true, false, $limit, $offset);
}
}
@OCILogOff($connection);
return $result;
}
// }}}
// {{{ _modifyQuery()
/**
* Changes a query string for various DBMS specific reasons
*
* @param string $query query to modify
* @param boolean $is_manip if it is a DML query
* @param integer $limit limit the number of rows
* @param integer $offset start reading from given offset
* @return string modified query
* @access protected
*/
function _modifyQuery($query, $is_manip, $limit, $offset)
{
if (preg_match('/^\s*SELECT/i', $query)) {
if (!preg_match('/\sFROM\s/i', $query)) {
$query.= " FROM dual";
}
if ($limit > 0) {
// taken from http://svn.ez.no/svn/ezcomponents/packages/Database
$max = $offset + $limit;
if ($offset > 0) {
$min = $offset + 1;
$query = "SELECT * FROM (SELECT a.*, ROWNUM mdb2rn FROM ($query) a WHERE ROWNUM <= $max) WHERE mdb2rn >= $min";
} else {
$query = "SELECT a.* FROM ($query) a WHERE ROWNUM <= $max";
}
}
}
return $query;
}
// }}}
// {{{ _doQuery()
/**
* Execute a query
* @param string $query query
* @param boolean $is_manip if the query is a manipulation query
* @param resource $connection
* @param string $database_name
* @return result or error object
* @access protected
*/
function &_doQuery($query, $is_manip = false, $connection = null, $database_name = null)
{
$this->last_query = $query;
$result = $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'pre'));
if ($result) {
if (PEAR::isError($result)) {
return $result;
}
$query = $result;
}
if ($this->getOption('disable_query')) {
if ($is_manip) {
return 0;
}
return null;
}
if (null === $connection) {
$connection = $this->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
}
$query = str_replace("\r\n", "\n", $query); //for fixing end-of-line character in the PL/SQL in windows
$result = @OCIParse($connection, $query);
if (!$result) {
$err = $this->raiseError(null, null, null,
'Could not create statement', __FUNCTION__);
return $err;
}
$mode = $this->in_transaction ? OCI_DEFAULT : OCI_COMMIT_ON_SUCCESS;
if (!@OCIExecute($result, $mode)) {
$err = $this->raiseError($result, null, null,
'Could not execute statement', __FUNCTION__);
return $err;
}
if (is_numeric($this->options['result_prefetching'])) {
@ocisetprefetch($result, $this->options['result_prefetching']);
}
$this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'post', 'result' => $result));
return $result;
}
// }}}
// {{{ _affectedRows()
/**
* Returns the number of rows affected
*
* @param resource $result
* @param resource $connection
* @return mixed MDB2 Error Object or the number of rows affected
* @access private
*/
function _affectedRows($connection, $result = null)
{
if (null === $connection) {
$connection = $this->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
}
return @OCIRowCount($result);
}
// }}}
// {{{ getServerVersion()
/**
* return version information about the server
*
* @param bool $native determines if the raw version string should be returned
* @return mixed array/string with version information or MDB2 error object
* @access public
*/
function getServerVersion($native = false)
{
$connection = $this->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
if ($this->connected_server_info) {
$server_info = $this->connected_server_info;
} else {
$server_info = @ociserverversion($connection);
}
if (!$server_info) {
return $this->raiseError(null, null, null,
'Could not get server information', __FUNCTION__);
}
// cache server_info
$this->connected_server_info = $server_info;
if (!$native) {
if (!preg_match('/ (\d+)\.(\d+)\.(\d+)\.([\d\.]+) /', $server_info, $tmp)) {
return $this->raiseError(MDB2_ERROR_INVALID, null, null,
'Could not parse version information:'.$server_info, __FUNCTION__);
}
$server_info = array(
'major' => $tmp[1],
'minor' => $tmp[2],
'patch' => $tmp[3],
'extra' => $tmp[4],
'native' => $server_info,
);
}
return $server_info;
}
// }}}
// {{{ prepare()
/**
* Prepares a query for multiple execution with execute().
* With some database backends, this is emulated.
* prepare() requires a generic query as string like
* 'INSERT INTO numbers VALUES(?,?)' or
* 'INSERT INTO numbers VALUES(:foo,:bar)'.
* The ? and :name and are placeholders which can be set using
* bindParam() and the query can be sent off using the execute() method.
* The allowed format for :name can be set with the 'bindname_format' option.
*
* @param string $query the query to prepare
* @param mixed $types array that contains the types of the placeholders
* @param mixed $result_types array that contains the types of the columns in
* the result set or MDB2_PREPARE_RESULT, if set to
* MDB2_PREPARE_MANIP the query is handled as a manipulation query
* @param mixed $lobs key (field) value (parameter) pair for all lob placeholders
* @return mixed resource handle for the prepared query on success, a MDB2
* error on failure
* @access public
* @see bindParam, execute
*/
function prepare($query, $types = null, $result_types = null, $lobs = array())
{
if ($this->options['emulate_prepared']) {
return parent::prepare($query, $types, $result_types, $lobs);
}
$is_manip = ($result_types === MDB2_PREPARE_MANIP);
$offset = $this->offset;
$limit = $this->limit;
$this->offset = $this->limit = 0;
$result = $this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'pre'));
if ($result) {
if (PEAR::isError($result)) {
return $result;
}
$query = $result;
}
$query = $this->_modifyQuery($query, $is_manip, $limit, $offset);
$placeholder_type_guess = $placeholder_type = null;
$question = '?';
$colon = ':';
$positions = array();
$position = 0;
$parameter = -1;
while ($position < strlen($query)) {
$q_position = strpos($query, $question, $position);
$c_position = strpos($query, $colon, $position);
if ($q_position && $c_position) {
$p_position = min($q_position, $c_position);
} elseif ($q_position) {
$p_position = $q_position;
} elseif ($c_position) {
$p_position = $c_position;
} else {
break;
}
if (null === $placeholder_type) {
$placeholder_type_guess = $query[$p_position];
}
$new_pos = $this->_skipDelimitedStrings($query, $position, $p_position);
if (PEAR::isError($new_pos)) {
return $new_pos;
}
if ($new_pos != $position) {
$position = $new_pos;
continue; //evaluate again starting from the new position
}
if ($query[$position] == $placeholder_type_guess) {
if (null === $placeholder_type) {
$placeholder_type = $query[$p_position];
$question = $colon = $placeholder_type;
if (!empty($types) && is_array($types)) {
if ($placeholder_type == ':') {
if (is_int(key($types))) {
$types_tmp = $types;
$types = array();
$count = -1;
}
} else {
$types = array_values($types);
}
}
}
if ($placeholder_type == ':') {
$regexp = '/^.{'.($position+1).'}('.$this->options['bindname_format'].').*$/s';
$parameter = preg_replace($regexp, '\\1', $query);
if ($parameter === '') {
$err = $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
'named parameter name must match "bindname_format" option', __FUNCTION__);
return $err;
}
// use parameter name in type array
if (isset($count) && isset($types_tmp[++$count])) {
$types[$parameter] = $types_tmp[$count];
}
$length = strlen($parameter) + 1;
} else {
++$parameter;
//$length = strlen($parameter);
$length = 1; // strlen('?')
}
if (!in_array($parameter, $positions)) {
$positions[] = $parameter;
}
if (isset($types[$parameter])
&& ($types[$parameter] == 'clob' || $types[$parameter] == 'blob')
) {
if (!isset($lobs[$parameter])) {
$lobs[$parameter] = $parameter;
}
$value = $this->quote(true, $types[$parameter]);
if (PEAR::isError($value)) {
return $value;
}
$query = substr_replace($query, $value, $p_position, $length);
$position = $p_position + strlen($value) - 1;
} elseif ($placeholder_type == '?') {
$query = substr_replace($query, ':'.$parameter, $p_position, 1);
$position = $p_position + $length;
} else {
$position = $p_position + 1;
}
} else {
$position = $p_position;
}
}
if (is_array($lobs)) {
$columns = $variables = '';
foreach ($lobs as $parameter => $field) {
$columns.= ($columns ? ', ' : ' RETURNING ').$field;
$variables.= ($variables ? ', ' : ' INTO ').':'.$parameter;
}
$query.= $columns.$variables;
}
$connection = $this->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
$statement = @OCIParse($connection, $query);
if (!$statement) {
$err = $this->raiseError(null, null, null,
'Could not create statement', __FUNCTION__);
return $err;
}
$class_name = 'MDB2_Statement_'.$this->phptype;
$obj = new $class_name($this, $statement, $positions, $query, $types, $result_types, $is_manip, $limit, $offset);
$this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'post', 'result' => $obj));
return $obj;
}
// }}}
// {{{ nextID()
/**
* Returns the next free id of a sequence
*
* @param string $seq_name name of the sequence
* @param boolean $ondemand when true the sequence is
* automatic created, if it
* not exists
* @return mixed MDB2 Error Object or id
* @access public
*/
function nextID($seq_name, $ondemand = true)
{
$sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
$query = "SELECT $sequence_name.nextval FROM DUAL";
$this->pushErrorHandling(PEAR_ERROR_RETURN);
$this->expectError(MDB2_ERROR_NOSUCHTABLE);
$result = $this->queryOne($query, 'integer');
$this->popExpect();
$this->popErrorHandling();
if (PEAR::isError($result)) {
if ($ondemand && $result->getCode() == MDB2_ERROR_NOSUCHTABLE) {
$this->loadModule('Manager', null, true);
$result = $this->manager->createSequence($seq_name);
if (PEAR::isError($result)) {
return $result;
}
return $this->nextId($seq_name, false);
}
}
return $result;
}
// }}}
// {{{ lastInsertID()
/**
* Returns the autoincrement ID if supported or $id or fetches the current
* ID in a sequence called: $table.(empty($field) ? '' : '_'.$field)
*
* @param string $table name of the table into which a new row was inserted
* @param string $field name of the field into which a new row was inserted
* @return mixed MDB2 Error Object or id
* @access public
*/
function lastInsertID($table = null, $field = null)
{
$old_seq = $table.(empty($field) ? '' : '_'.$field);
$sequence_name = $this->quoteIdentifier($this->getSequenceName($table), true);
$result = $this->queryOne("SELECT $sequence_name.currval", 'integer');
if (PEAR::isError($result)) {
$sequence_name = $this->quoteIdentifier($this->getSequenceName($old_seq), true);
$result = $this->queryOne("SELECT $sequence_name.currval", 'integer');
}
return $result;
}
// }}}
// {{{ currId()
/**
* Returns the current id of a sequence
*
* @param string $seq_name name of the sequence
* @return mixed MDB2_Error or id
* @access public
*/
function currId($seq_name)
{
$sequence_name = $this->getSequenceName($seq_name);
$query = 'SELECT (last_number-1) FROM all_sequences';
$query.= ' WHERE sequence_name='.$this->quote($sequence_name, 'text');
$query.= ' OR sequence_name='.$this->quote(strtoupper($sequence_name), 'text');
return $this->queryOne($query, 'integer');
}
}
/**
* MDB2 OCI8 result driver
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
*/
class MDB2_Result_oci8 extends MDB2_Result_Common
{
// }}}
// {{{ fetchRow()
/**
* Fetch a row and insert the data into an existing array.
*
* @param int $fetchmode how the array data should be indexed
* @param int $rownum number of the row where the data can be found
* @return int data array on success, a MDB2 error on failure
* @access public
*/
function fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
{
if (null !== $rownum) {
$seek = $this->seek($rownum);
if (PEAR::isError($seek)) {
return $seek;
}
}
if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
$fetchmode = $this->db->fetchmode;
}
if ($fetchmode & MDB2_FETCHMODE_ASSOC) {
@OCIFetchInto($this->result, $row, OCI_ASSOC+OCI_RETURN_NULLS);
if (is_array($row)
&& $this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
) {
$row = array_change_key_case($row, $this->db->options['field_case']);
}
} else {
@OCIFetchInto($this->result, $row, OCI_RETURN_NULLS);
}
if (!$row) {
if (false === $this->result) {
$err = $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'resultset has already been freed', __FUNCTION__);
return $err;
}
return null;
}
// remove additional column at the end
if ($this->offset > 0) {
array_pop($row);
}
$mode = 0;
$rtrim = false;
if ($this->db->options['portability'] & MDB2_PORTABILITY_RTRIM) {
if (empty($this->types)) {
$mode += MDB2_PORTABILITY_RTRIM;
} else {
$rtrim = true;
}
}
if ($mode) {
$this->db->_fixResultArrayValues($row, $mode);
}
if (!empty($this->types)) {
$row = $this->db->datatype->convertResultRow($this->types, $row, $rtrim);
}
if (!empty($this->values)) {
$this->_assignBindColumns($row);
}
if ($fetchmode === MDB2_FETCHMODE_OBJECT) {
$object_class = $this->db->options['fetch_class'];
if ($object_class == 'stdClass') {
$row = (object) $row;
} else {
$rowObj = new $object_class($row);
$row = $rowObj;
}
}
++$this->rownum;
return $row;
}
// }}}
// {{{ _getColumnNames()
/**
* Retrieve the names of columns returned by the DBMS in a query result.
*
* @return mixed Array variable that holds the names of columns as keys
* or an MDB2 error on failure.
* Some DBMS may not return any columns when the result set
* does not contain any rows.
* @access private
*/
function _getColumnNames()
{
$columns = array();
$numcols = $this->numCols();
if (PEAR::isError($numcols)) {
return $numcols;
}
for ($column = 0; $column < $numcols; $column++) {
$column_name = @OCIColumnName($this->result, $column + 1);
$columns[$column_name] = $column;
}
if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$columns = array_change_key_case($columns, $this->db->options['field_case']);
}
return $columns;
}
// }}}
// {{{ numCols()
/**
* Count the number of columns returned by the DBMS in a query result.
*
* @return mixed integer value with the number of columns, a MDB2 error
* on failure
* @access public
*/
function numCols()
{
$cols = @OCINumCols($this->result);
if (null === $cols) {
if (false === $this->result) {
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'resultset has already been freed', __FUNCTION__);
}
if (null === $this->result) {
return count($this->types);
}
return $this->db->raiseError(null, null, null,
'Could not get column count', __FUNCTION__);
}
if ($this->offset > 0) {
--$cols;
}
return $cols;
}
// }}}
// {{{ free()
/**
* Free the internal resources associated with $result.
*
* @return boolean true on success, false if $result is invalid
* @access public
*/
function free()
{
if (is_resource($this->result) && $this->db->connection) {
$free = @OCIFreeCursor($this->result);
if (false === $free) {
return $this->db->raiseError(null, null, null,
'Could not free result', __FUNCTION__);
}
}
$this->result = false;
return MDB2_OK;
}
}
/**
* MDB2 OCI8 buffered result driver
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
*/
class MDB2_BufferedResult_oci8 extends MDB2_Result_oci8
{
var $buffer;
var $buffer_rownum = - 1;
// {{{ _fillBuffer()
/**
* Fill the row buffer
*
* @param int $rownum row number upto which the buffer should be filled
if the row number is null all rows are ready into the buffer
* @return boolean true on success, false on failure
* @access protected
*/
function _fillBuffer($rownum = null)
{
if (isset($this->buffer) && is_array($this->buffer)) {
if (null === $rownum) {
if (!end($this->buffer)) {
return false;
}
} elseif (isset($this->buffer[$rownum])) {
return (bool)$this->buffer[$rownum];
}
}
$row = true;
while (((null === $rownum) || $this->buffer_rownum < $rownum)
&& ($row = @OCIFetchInto($this->result, $buffer, OCI_RETURN_NULLS))
) {
++$this->buffer_rownum;
// remove additional column at the end
if ($this->offset > 0) {
array_pop($buffer);
}
if (empty($this->types)) {
foreach (array_keys($buffer) as $key) {
if (is_a($buffer[$key], 'oci-lob')) {
$buffer[$key] = $buffer[$key]->load();
}
}
}
$this->buffer[$this->buffer_rownum] = $buffer;
}
if (!$row) {
++$this->buffer_rownum;
$this->buffer[$this->buffer_rownum] = false;
return false;
}
return true;
}
// }}}
// {{{ fetchRow()
/**
* Fetch a row and insert the data into an existing array.
*
* @param int $fetchmode how the array data should be indexed
* @param int $rownum number of the row where the data can be found
* @return int data array on success, a MDB2 error on failure
* @access public
*/
function fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
{
if (false === $this->result) {
$err = $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'resultset has already been freed', __FUNCTION__);
return $err;
}
if (null === $this->result) {
return null;
}
if (null !== $rownum) {
$seek = $this->seek($rownum);
if (PEAR::isError($seek)) {
return $seek;
}
}
$target_rownum = $this->rownum + 1;
if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
$fetchmode = $this->db->fetchmode;
}
if (!$this->_fillBuffer($target_rownum)) {
return null;
}
$row = $this->buffer[$target_rownum];
if ($fetchmode & MDB2_FETCHMODE_ASSOC) {
$column_names = $this->getColumnNames();
foreach ($column_names as $name => $i) {
$column_names[$name] = $row[$i];
}
$row = $column_names;
}
$mode = 0;
$rtrim = false;
if ($this->db->options['portability'] & MDB2_PORTABILITY_RTRIM) {
if (empty($this->types)) {
$mode += MDB2_PORTABILITY_RTRIM;
} else {
$rtrim = true;
}
}
if ($mode) {
$this->db->_fixResultArrayValues($row, $mode);
}
if (!empty($this->types)) {
$row = $this->db->datatype->convertResultRow($this->types, $row, $rtrim);
}
if (!empty($this->values)) {
$this->_assignBindColumns($row);
}
if ($fetchmode === MDB2_FETCHMODE_OBJECT) {
$object_class = $this->db->options['fetch_class'];
if ($object_class == 'stdClass') {
$row = (object) $row;
} else {
$rowObj = new $object_class($row);
$row = $rowObj;
}
}
++$this->rownum;
return $row;
}
// }}}
// {{{ seek()
/**
* Seek to a specific row in a result set
*
* @param int $rownum number of the row where the data can be found
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function seek($rownum = 0)
{
if (false === $this->result) {
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'resultset has already been freed', __FUNCTION__);
}
$this->rownum = $rownum - 1;
return MDB2_OK;
}
// }}}
// {{{ valid()
/**
* Check if the end of the result set has been reached
*
* @return mixed true or false on sucess, a MDB2 error on failure
* @access public
*/
function valid()
{
if (false === $this->result) {
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'resultset has already been freed', __FUNCTION__);
}
if (null === $this->result) {
return true;
}
if ($this->_fillBuffer($this->rownum + 1)) {
return true;
}
return false;
}
// }}}
// {{{ numRows()
/**
* Returns the number of rows in a result object
*
* @return mixed MDB2 Error Object or the number of rows
* @access public
*/
function numRows()
{
if (false === $this->result) {
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'resultset has already been freed', __FUNCTION__);
}
if (null === $this->result) {
return 0;
}
$this->_fillBuffer();
return $this->buffer_rownum;
}
// }}}
// {{{ free()
/**
* Free the internal resources associated with $result.
*
* @return boolean true on success, false if $result is invalid
* @access public
*/
function free()
{
$this->buffer = null;
$this->buffer_rownum = null;
return parent::free();
}
}
/**
* MDB2 OCI8 statement driver
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
*/
class MDB2_Statement_oci8 extends MDB2_Statement_Common
{
// {{{ Variables (Properties)
var $type_maxlengths = array();
// }}}
// {{{ bindParam()
/**
* Bind a variable to a parameter of a prepared query.
*
* @param int $parameter the order number of the parameter in the query
* statement. The order number of the first parameter is 1.
* @param mixed &$value variable that is meant to be bound to specified
* parameter. The type of the value depends on the $type argument.
* @param string $type specifies the type of the field
* @param int $maxlength specifies the maximum length of the field; if set to -1, the
* current length of $value is used
*
* @return mixed MDB2_OK on success, a MDB2 error on failure
*
* @access public
*/
function bindParam($parameter, &$value, $type = null, $maxlength = -1)
{
if (!is_numeric($parameter)) {
$parameter = preg_replace('/^:(.*)$/', '\\1', $parameter);
}
if (MDB2_OK === ($ret = parent::bindParam($parameter, $value, $type))) {
$this->type_maxlengths[$parameter] = $maxlength;
}
return $ret;
}
// }}}
// {{{ _execute()
/**
* Execute a prepared query statement helper method.
*
* @param mixed $result_class string which specifies which result class to use
* @param mixed $result_wrap_class string which specifies which class to wrap results in
*
* @return mixed MDB2_Result or integer (affected rows) on success,
* a MDB2 error on failure
* @access private
*/
function _execute($result_class = true, $result_wrap_class = false)
{
if (null === $this->statement) {
return parent::_execute($result_class, $result_wrap_class);
}
$this->db->last_query = $this->query;
$this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'pre', 'parameters' => $this->values));
if ($this->db->getOption('disable_query')) {
$result = $this->is_manip ? 0 : null;
return $result;
}
$connection = $this->db->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
$result = MDB2_OK;
$lobs = $quoted_values = array();
$i = 0;
foreach ($this->positions as $parameter) {
if (!array_key_exists($parameter, $this->values)) {
return $this->db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
'Unable to bind to missing placeholder: '.$parameter, __FUNCTION__);
}
$type = array_key_exists($parameter, $this->types) ? $this->types[$parameter] : null;
if ($type == 'clob' || $type == 'blob') {
$lobs[$i]['file'] = false;
if (is_resource($this->values[$parameter])) {
$fp = $this->values[$parameter];
$this->values[$parameter] = '';
while (!feof($fp)) {
$this->values[$parameter] .= fread($fp, 8192);
}
} elseif (is_a($this->values[$parameter], 'OCI-Lob')) {
//do nothing
} elseif ($this->db->getOption('lob_allow_url_include')
&& preg_match('/^(\w+:\/\/)(.*)$/', $this->values[$parameter], $match)
) {
$lobs[$i]['file'] = true;
if ($match[1] == 'file://') {
$this->values[$parameter] = $match[2];
}
}
$lobs[$i]['value'] = $this->values[$parameter];
$lobs[$i]['descriptor'] =& $this->values[$parameter];
// Test to see if descriptor has already been created for this
// variable (i.e. if it has been bound more than once):
if (!is_a($this->values[$parameter], 'OCI-Lob')) {
$this->values[$parameter] = @OCINewDescriptor($connection, OCI_D_LOB);
if (false === $this->values[$parameter]) {
$result = $this->db->raiseError(null, null, null,
'Unable to create descriptor for LOB in parameter: '.$parameter, __FUNCTION__);
break;
}
}
$lob_type = ($type == 'blob' ? OCI_B_BLOB : OCI_B_CLOB);
if (!@OCIBindByName($this->statement, ':'.$parameter, $lobs[$i]['descriptor'], -1, $lob_type)) {
$result = $this->db->raiseError($this->statement, null, null,
'could not bind LOB parameter', __FUNCTION__);
break;
}
} else if ($type == OCI_B_BFILE) {
// Test to see if descriptor has already been created for this
// variable (i.e. if it has been bound more than once):
if (!is_a($this->values[$parameter], "OCI-Lob")) {
$this->values[$parameter] = @OCINewDescriptor($connection, OCI_D_FILE);
if (false === $this->values[$parameter]) {
$result = $this->db->raiseError(null, null, null,
'Unable to create descriptor for BFILE in parameter: '.$parameter, __FUNCTION__);
break;
}
}
if (!@OCIBindByName($this->statement, ':'.$parameter, $this->values[$parameter], -1, $type)) {
$result = $this->db->raiseError($this->statement, null, null,
'Could not bind BFILE parameter', __FUNCTION__);
break;
}
} else if ($type == OCI_B_ROWID) {
// Test to see if descriptor has already been created for this
// variable (i.e. if it has been bound more than once):
if (!is_a($this->values[$parameter], "OCI-Lob")) {
$this->values[$parameter] = @OCINewDescriptor($connection, OCI_D_ROWID);
if (false === $this->values[$parameter]) {
$result = $this->db->raiseError(null, null, null,
'Unable to create descriptor for ROWID in parameter: '.$parameter, __FUNCTION__);
break;
}
}
if (!@OCIBindByName($this->statement, ':'.$parameter, $this->values[$parameter], -1, $type)) {
$result = $this->db->raiseError($this->statement, null, null,
'Could not bind ROWID parameter', __FUNCTION__);
break;
}
} else if ($type == OCI_B_CURSOR) {
// Test to see if cursor has already been allocated for this
// variable (i.e. if it has been bound more than once):
if (!is_resource($this->values[$parameter]) || !get_resource_type($this->values[$parameter]) == "oci8 statement") {
$this->values[$parameter] = @OCINewCursor($connection);
if (false === $this->values[$parameter]) {
$result = $this->db->raiseError(null, null, null,
'Unable to allocate cursor for parameter: '.$parameter, __FUNCTION__);
break;
}
}
if (!@OCIBindByName($this->statement, ':'.$parameter, $this->values[$parameter], -1, $type)) {
$result = $this->db->raiseError($this->statement, null, null,
'Could not bind CURSOR parameter', __FUNCTION__);
break;
}
} else {
$maxlength = array_key_exists($parameter, $this->type_maxlengths) ? $this->type_maxlengths[$parameter] : -1;
$this->values[$parameter] = $this->db->quote($this->values[$parameter], $type, false);
$quoted_values[$i] =& $this->values[$parameter];
if (PEAR::isError($quoted_values[$i])) {
return $quoted_values[$i];
}
if (!@OCIBindByName($this->statement, ':'.$parameter, $quoted_values[$i], $maxlength)) {
$result = $this->db->raiseError($this->statement, null, null,
'could not bind non-abstract parameter', __FUNCTION__);
break;
}
}
++$i;
}
$lob_keys = array_keys($lobs);
if (!PEAR::isError($result)) {
$mode = (!empty($lobs) || $this->db->in_transaction) ? OCI_DEFAULT : OCI_COMMIT_ON_SUCCESS;
if (!@OCIExecute($this->statement, $mode)) {
$err = $this->db->raiseError($this->statement, null, null,
'could not execute statement', __FUNCTION__);
return $err;
}
if (!empty($lobs)) {
foreach ($lob_keys as $i) {
if ((null !== $lobs[$i]['value']) && $lobs[$i]['value'] !== '') {
if (is_object($lobs[$i]['value'])) {
// Probably a NULL LOB
// @see http://bugs.php.net/bug.php?id=27485
continue;
}
if ($lobs[$i]['file']) {
$result = $lobs[$i]['descriptor']->savefile($lobs[$i]['value']);
} else {
$result = $lobs[$i]['descriptor']->save($lobs[$i]['value']);
}
if (!$result) {
$result = $this->db->raiseError(null, null, null,
'Unable to save descriptor contents', __FUNCTION__);
break;
}
}
}
if (!PEAR::isError($result)) {
if (!$this->db->in_transaction) {
if (!@OCICommit($connection)) {
$result = $this->db->raiseError(null, null, null,
'Unable to commit transaction', __FUNCTION__);
}
} else {
++$this->db->uncommitedqueries;
}
}
}
}
if (PEAR::isError($result)) {
return $result;
}
if ($this->is_manip) {
$affected_rows = $this->db->_affectedRows($connection, $this->statement);
return $affected_rows;
}
$result = $this->db->_wrapResult($this->statement, $this->result_types,
$result_class, $result_wrap_class, $this->limit, $this->offset);
$this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'post', 'result' => $result));
return $result;
}
// }}}
// {{{ free()
/**
* Release resources allocated for the specified prepared query.
*
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function free()
{
if (null === $this->positions) {
return $this->db->raiseError(MDB2_ERROR, null, null,
'Prepared statement has already been freed', __FUNCTION__);
}
$result = MDB2_OK;
if ((null !== $this->statement) && !@OCIFreeStatement($this->statement)) {
$result = $this->db->raiseError(null, null, null,
'Could not free statement', __FUNCTION__);
}
parent::free();
return $result;
}
}
?>