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Diffstat (limited to 'program/lib/MDB2/Driver/mssql.php')
| -rw-r--r-- | program/lib/MDB2/Driver/mssql.php | 1010 |
1 files changed, 1010 insertions, 0 deletions
diff --git a/program/lib/MDB2/Driver/mssql.php b/program/lib/MDB2/Driver/mssql.php new file mode 100644 index 000000000..f74acfea4 --- /dev/null +++ b/program/lib/MDB2/Driver/mssql.php @@ -0,0 +1,1010 @@ +<?php
+// vim: set et ts=4 sw=4 fdm=marker:
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox, |
+// | Stig. S. Bakken, Lukas Smith, Frank M. Kromann |
+// | 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: Frank M. Kromann <frank@kromann.info> |
+// +----------------------------------------------------------------------+
+//
+// $Id: mssql.php,v 1.161 2007/11/18 17:52:00 quipo Exp $
+//
+// {{{ Class MDB2_Driver_mssql
+/**
+ * MDB2 MSSQL Server driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author Frank M. Kromann <frank@kromann.info>
+ */
+class MDB2_Driver_mssql extends MDB2_Driver_Common
+{
+ // {{{ properties
+
+ var $string_quoting = array('start' => "'", 'end' => "'", 'escape' => "'", 'escape_pattern' => false);
+
+ var $identifier_quoting = array('start' => '[', 'end' => ']', 'escape' => ']');
+
+ // }}}
+ // {{{ constructor
+
+ /**
+ * Constructor
+ */
+ function __construct()
+ {
+ parent::__construct();
+
+ $this->phptype = 'mssql';
+ $this->dbsyntax = 'mssql';
+
+ $this->supported['sequences'] = 'emulated';
+ $this->supported['indexes'] = true;
+ $this->supported['affected_rows'] = true;
+ $this->supported['transactions'] = true;
+ $this->supported['savepoints'] = false;
+ $this->supported['summary_functions'] = true;
+ $this->supported['order_by_text'] = true;
+ $this->supported['current_id'] = 'emulated';
+ $this->supported['limit_queries'] = 'emulated';
+ $this->supported['LOBs'] = true;
+ $this->supported['replace'] = 'emulated';
+ $this->supported['sub_selects'] = true;
+ $this->supported['auto_increment'] = true;
+ $this->supported['primary_key'] = true;
+ $this->supported['result_introspection'] = true;
+ $this->supported['prepared_statements'] = 'emulated';
+ $this->supported['pattern_escaping'] = true;
+ $this->supported['new_link'] = true;
+
+ $this->options['database_device'] = false;
+ $this->options['database_size'] = false;
+ }
+
+ // }}}
+ // {{{ errorInfo()
+
+ /**
+ * This method is used to collect information about an error
+ *
+ * @param integer $error
+ * @return array
+ * @access public
+ */
+ function errorInfo($error = null)
+ {
+ $native_code = null;
+ if ($this->connection) {
+ $result = @mssql_query('select @@ERROR as ErrorCode', $this->connection);
+ if ($result) {
+ $native_code = @mssql_result($result, 0, 0);
+ @mssql_free_result($result);
+ }
+ }
+ $native_msg = @mssql_get_last_message();
+ if (is_null($error)) {
+ static $ecode_map;
+ if (empty($ecode_map)) {
+ $ecode_map = array(
+ 102 => MDB2_ERROR_SYNTAX,
+ 110 => MDB2_ERROR_VALUE_COUNT_ON_ROW,
+ 155 => MDB2_ERROR_NOSUCHFIELD,
+ 156 => MDB2_ERROR_SYNTAX,
+ 170 => MDB2_ERROR_SYNTAX,
+ 207 => MDB2_ERROR_NOSUCHFIELD,
+ 208 => MDB2_ERROR_NOSUCHTABLE,
+ 245 => MDB2_ERROR_INVALID_NUMBER,
+ 319 => MDB2_ERROR_SYNTAX,
+ 321 => MDB2_ERROR_NOSUCHFIELD,
+ 325 => MDB2_ERROR_SYNTAX,
+ 336 => MDB2_ERROR_SYNTAX,
+ 515 => MDB2_ERROR_CONSTRAINT_NOT_NULL,
+ 547 => MDB2_ERROR_CONSTRAINT,
+ 1018 => MDB2_ERROR_SYNTAX,
+ 1035 => MDB2_ERROR_SYNTAX,
+ 1913 => MDB2_ERROR_ALREADY_EXISTS,
+ 2209 => MDB2_ERROR_SYNTAX,
+ 2223 => MDB2_ERROR_SYNTAX,
+ 2248 => MDB2_ERROR_SYNTAX,
+ 2256 => MDB2_ERROR_SYNTAX,
+ 2257 => MDB2_ERROR_SYNTAX,
+ 2627 => MDB2_ERROR_CONSTRAINT,
+ 2714 => MDB2_ERROR_ALREADY_EXISTS,
+ 3607 => MDB2_ERROR_DIVZERO,
+ 3701 => MDB2_ERROR_NOSUCHTABLE,
+ 7630 => MDB2_ERROR_SYNTAX,
+ 8134 => MDB2_ERROR_DIVZERO,
+ 9303 => MDB2_ERROR_SYNTAX,
+ 9317 => MDB2_ERROR_SYNTAX,
+ 9318 => MDB2_ERROR_SYNTAX,
+ 9331 => MDB2_ERROR_SYNTAX,
+ 9332 => MDB2_ERROR_SYNTAX,
+ 15253 => MDB2_ERROR_SYNTAX,
+ );
+ }
+ if (isset($ecode_map[$native_code])) {
+ if ($native_code == 3701
+ && preg_match('/Cannot drop the index/i', $native_msg)
+ ) {
+ $error = MDB2_ERROR_NOT_FOUND;
+ } else {
+ $error = $ecode_map[$native_code];
+ }
+ }
+ }
+ return array($error, $native_code, $native_msg);
+ }
+
+ // }}}
+ // {{{ function escapePattern($text)
+
+ /**
+ * Quotes pattern (% and _) characters in a string)
+ *
+ * @param string the input string to quote
+ *
+ * @return string quoted string
+ *
+ * @access public
+ */
+ function escapePattern($text)
+ {
+ $text = str_replace("[", "[ [ ]", $text);
+ foreach ($this->wildcards as $wildcard) {
+ $text = str_replace($wildcard, '[' . $wildcard . ']', $text);
+ }
+ return $text;
+ }
+
+ // }}}
+ // {{{ beginTransaction()
+
+ /**
+ * Start a transaction or set a savepoint.
+ *
+ * @param string name of a savepoint to set
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ *
+ * @access public
+ */
+ function beginTransaction($savepoint = null)
+ {
+ $this->debug('Starting transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+ if (!is_null($savepoint)) {
+ if (!$this->in_transaction) {
+ return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+ 'savepoint cannot be released when changes are auto committed', __FUNCTION__);
+ }
+ $query = 'SAVE TRANSACTION '.$savepoint;
+ return $this->_doQuery($query, true);
+ } elseif ($this->in_transaction) {
+ return MDB2_OK; //nothing to do
+ }
+ if (!$this->destructor_registered && $this->opened_persistent) {
+ $this->destructor_registered = true;
+ register_shutdown_function('MDB2_closeOpenTransactions');
+ }
+ $result =& $this->_doQuery('BEGIN TRANSACTION', true);
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+ $this->in_transaction = true;
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ commit()
+
+ /**
+ * Commit the database changes done during a transaction that is in
+ * progress or release a savepoint. This function may only be called when
+ * auto-committing is disabled, otherwise it will fail. Therefore, a new
+ * transaction is implicitly started after committing the pending changes.
+ *
+ * @param string name of a savepoint to release
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ *
+ * @access public
+ */
+ function commit($savepoint = null)
+ {
+ $this->debug('Committing transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+ if (!$this->in_transaction) {
+ return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+ 'commit/release savepoint cannot be done changes are auto committed', __FUNCTION__);
+ }
+ if (!is_null($savepoint)) {
+ return MDB2_OK;
+ }
+
+ $result =& $this->_doQuery('COMMIT TRANSACTION', true);
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+ $this->in_transaction = false;
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ rollback()
+
+ /**
+ * Cancel any database changes done during a transaction or since a specific
+ * savepoint that is in progress. This function may only be called when
+ * auto-committing is disabled, otherwise it will fail. Therefore, a new
+ * transaction is implicitly started after canceling the pending changes.
+ *
+ * @param string name of a savepoint to rollback to
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ *
+ * @access public
+ */
+ function rollback($savepoint = null)
+ {
+ $this->debug('Rolling back transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+ if (!$this->in_transaction) {
+ return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+ 'rollback cannot be done changes are auto committed', __FUNCTION__);
+ }
+ if (!is_null($savepoint)) {
+ $query = 'ROLLBACK TRANSACTION '.$savepoint;
+ return $this->_doQuery($query, true);
+ }
+
+ $result =& $this->_doQuery('ROLLBACK TRANSACTION', true);
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+ $this->in_transaction = false;
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ connect()
+
+ /**
+ * Connect to the database
+ *
+ * @return true on success, MDB2 Error Object on failure
+ */
+ function connect()
+ {
+ if (is_resource($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;
+ }
+ $this->disconnect(false);
+ }
+
+ if (!PEAR::loadExtension($this->phptype)) {
+ return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+ 'extension '.$this->phptype.' is not compiled into PHP', __FUNCTION__);
+ }
+
+ $params = array(
+ $this->dsn['hostspec'] ? $this->dsn['hostspec'] : 'localhost',
+ $this->dsn['username'] ? $this->dsn['username'] : null,
+ $this->dsn['password'] ? $this->dsn['password'] : null,
+ );
+ if ($this->dsn['port']) {
+ $params[0].= ((substr(PHP_OS, 0, 3) == 'WIN') ? ',' : ':').$this->dsn['port'];
+ }
+ if (!$this->options['persistent']) {
+ if (isset($this->dsn['new_link'])
+ && ($this->dsn['new_link'] == 'true' || $this->dsn['new_link'] === true)
+ ) {
+ $params[] = true;
+ } else {
+ $params[] = false;
+ }
+ }
+
+ $connect_function = $this->options['persistent'] ? 'mssql_pconnect' : 'mssql_connect';
+
+ $connection = @call_user_func_array($connect_function, $params);
+ if ($connection <= 0) {
+ return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
+ 'unable to establish a connection', __FUNCTION__, __FUNCTION__);
+ }
+
+ if (!empty($this->dsn['charset'])) {
+ $result = $this->setCharset($this->dsn['charset'], $connection);
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+ }
+
+ if ((bool)ini_get('mssql.datetimeconvert')) {
+ @ini_set('mssql.datetimeconvert', '0');
+ }
+
+ if (empty($this->dsn['disable_iso_date'])) {
+ @mssql_query('SET DATEFORMAT ymd', $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 != $this->connected_database_name) {
+ if (!@mssql_select_db($this->database_name, $connection)) {
+ $err = $this->raiseError(null, null, null,
+ 'Could not select the database: '.$this->database_name, __FUNCTION__);
+ return $err;
+ }
+ $this->connected_database_name = $this->database_name;
+ }
+ }
+
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ 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 || $force) {
+ @mssql_close($this->connection);
+ }
+ }
+ return parent::disconnect($force);
+ }
+
+ // }}}
+ // {{{ _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->options['disable_query']) {
+ $result = $is_manip ? 0 : null;
+ return $result;
+ }
+
+ if (is_null($connection)) {
+ $connection = $this->getConnection();
+ if (PEAR::isError($connection)) {
+ return $connection;
+ }
+ }
+ if (is_null($database_name)) {
+ $database_name = $this->database_name;
+ }
+
+ if ($database_name) {
+ if ($database_name != $this->connected_database_name) {
+ if (!@mssql_select_db($database_name, $connection)) {
+ $err = $this->raiseError(null, null, null,
+ 'Could not select the database: '.$database_name, __FUNCTION__);
+ return $err;
+ }
+ $this->connected_database_name = $database_name;
+ }
+ }
+
+ $result = @mssql_query($query, $connection);
+ if (!$result) {
+ $err =& $this->raiseError(null, null, null,
+ 'Could not execute statement', __FUNCTION__);
+ return $err;
+ }
+
+ $this->debug($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, $result = null)
+ {
+ if (is_null($connection)) {
+ $connection = $this->getConnection();
+ if (PEAR::isError($connection)) {
+ return $connection;
+ }
+ }
+ return @mssql_rows_affected($connection);
+ }
+
+ // }}}
+ // {{{ _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, $offset)
+ {
+ if ($limit > 0) {
+ $fetch = $offset + $limit;
+ if (!$is_manip) {
+ return preg_replace('/^([\s(])*SELECT( DISTINCT)?(?!\s*TOP\s*\()/i',
+ "\\1SELECT\\2 TOP $fetch", $query);
+ }
+ }
+ return $query;
+ }
+
+ // }}}
+ // {{{ 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)
+ {
+ if ($this->connected_server_info) {
+ $server_info = $this->connected_server_info;
+ } else {
+ $query = 'SELECT @@VERSION';
+ $server_info = $this->queryOne($query, 'text');
+ if (PEAR::isError($server_info)) {
+ return $server_info;
+ }
+ }
+ // cache server_info
+ $this->connected_server_info = $server_info;
+ if (!$native && !PEAR::isError($server_info)) {
+ if (preg_match('/([0-9]+)\.([0-9]+)\.([0-9]+)/', $server_info, $tmp)) {
+ $server_info = array(
+ 'major' => $tmp[1],
+ 'minor' => $tmp[2],
+ 'patch' => $tmp[3],
+ 'extra' => null,
+ 'native' => $server_info,
+ );
+ } else {
+ $server_info = array(
+ 'major' => null,
+ 'minor' => null,
+ 'patch' => null,
+ 'extra' => null,
+ 'native' => $server_info,
+ );
+ }
+ }
+ return $server_info;
+ }
+
+ // }}}
+ // {{{ _checkSequence
+
+ /**
+ * Checks if there's a sequence that exists.
+ *
+ * @param string $seq_name The sequence name to verify.
+ * @return bool $tableExists The value if the table exists or not
+ * @access private
+ */
+ function _checkSequence($seq_name)
+ {
+ $query = "SELECT * FROM $seq_name";
+ $tableExists =& $this->_doQuery($query, true);
+ if (PEAR::isError($tableExists)) {
+ if ($tableExists->getCode() == MDB2_ERROR_NOSUCHTABLE) {
+ return false;
+ }
+ //return $tableExists;
+ return false;
+ }
+ return mssql_result($tableExists, 0, 0);
+ }
+
+ // }}}
+ // {{{ 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);
+ $seqcol_name = $this->quoteIdentifier($this->options['seqcol_name'], true);
+ $this->expectError(MDB2_ERROR_NOSUCHTABLE);
+
+ $seq_val = $this->_checkSequence($sequence_name);
+
+ if ($seq_val) {
+ $query = "SET IDENTITY_INSERT $sequence_name OFF ".
+ "INSERT INTO $sequence_name DEFAULT VALUES";
+ } else {
+ $query = "INSERT INTO $sequence_name ($seqcol_name) VALUES (0)";
+ }
+ $result =& $this->_doQuery($query, true);
+ $this->popExpect();
+ if (PEAR::isError($result)) {
+ if ($ondemand && !$this->_checkSequence($sequence_name)) {
+ $this->loadModule('Manager', null, true);
+ $result = $this->manager->createSequence($seq_name);
+ if (PEAR::isError($result)) {
+ return $this->raiseError($result, null, null,
+ 'on demand sequence '.$seq_name.' could not be created', __FUNCTION__);
+ } else {
+ /**
+ * Little off-by-one problem with the sequence emulation
+ * here being fixed, that instead of re-calling nextID
+ * and forcing an increment by one, we simply check if it
+ * exists, then we get the last inserted id if it does.
+ *
+ * In theory, $seq_name should be created otherwise there would
+ * have been an error thrown somewhere up there..
+ *
+ * @todo confirm
+ */
+ if ($this->_checkSequence($seq_name)) {
+ return $this->lastInsertID($seq_name);
+ }
+
+ return $this->nextID($seq_name, false);
+ }
+ }
+ return $result;
+ }
+ $value = $this->lastInsertID($sequence_name);
+ if (is_numeric($value)) {
+ $query = "DELETE FROM $sequence_name WHERE $seqcol_name < $value";
+ $result =& $this->_doQuery($query, true);
+ if (PEAR::isError($result)) {
+ $this->warnings[] = 'nextID: could not delete previous sequence table values from '.$seq_name;
+ }
+ }
+ return $value;
+ }
+
+ // }}}
+ // {{{ 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)
+ {
+ $server_info = $this->getServerVersion();
+ if (is_array($server_info) && !is_null($server_info['major'])
+ && $server_info['major'] >= 8
+ ) {
+ $query = "SELECT SCOPE_IDENTITY()";
+ } else {
+ $query = "SELECT @@IDENTITY";
+ }
+
+ return $this->queryOne($query, 'integer');
+ }
+
+ // }}}
+}
+
+// }}}
+// {{{ Class MDB2_Result_mssql
+
+/**
+ * MDB2 MSSQL Server result driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author Frank M. Kromann <frank@kromann.info>
+ */
+class MDB2_Result_mssql extends MDB2_Result_Common
+{
+ // {{{ _skipLimitOffset()
+
+ /**
+ * Skip the first row of a result set.
+ *
+ * @param resource $result
+ * @return mixed a result handle or MDB2_OK on success, a MDB2 error on failure
+ * @access protected
+ */
+ function _skipLimitOffset()
+ {
+ if ($this->limit) {
+ if ($this->rownum >= $this->limit) {
+ return false;
+ }
+ }
+ if ($this->offset) {
+ while ($this->offset_count < $this->offset) {
+ ++$this->offset_count;
+ if (!is_array(@mssql_fetch_row($this->result))) {
+ $this->offset_count = $this->limit;
+ return false;
+ }
+ }
+ }
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ 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, $rownum = null)
+ {
+ if (!$this->_skipLimitOffset()) {
+ $null = null;
+ return $null;
+ }
+ if (!is_null($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) {
+ $row = @mssql_fetch_assoc($this->result);
+ if (is_array($row)
+ && $this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
+ ) {
+ $row = array_change_key_case($row, $this->db->options['field_case']);
+ }
+ } else {
+ $row = @mssql_fetch_row($this->result);
+ }
+ if (!$row) {
+ if ($this->result === false) {
+ $err =& $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'resultset has already been freed', __FUNCTION__);
+ return $err;
+ }
+ $null = null;
+ return $null;
+ }
+ $mode = $this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL;
+ $rtrim = false;
+ if ($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 {
+ $row = &new $object_class($row);
+ }
+ }
+ ++$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++) {
+ $column_name = @mssql_field_name($this->result, $column);
+ $columns[$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()
+ {
+ $cols = @mssql_num_fields($this->result);
+ if (is_null($cols)) {
+ if ($this->result === false) {
+ return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'resultset has already been freed', __FUNCTION__);
+ } elseif (is_null($this->result)) {
+ return count($this->types);
+ }
+ return $this->db->raiseError(null, null, null,
+ 'Could not get column count', __FUNCTION__);
+ }
+ return $cols;
+ }
+
+ // }}}
+ // {{{ nextResult()
+
+ /**
+ * Move the internal result pointer to the next available result
+ *
+ * @return true on success, false if there is no more result set or an error object on failure
+ * @access public
+ */
+ function nextResult()
+ {
+ if ($this->result === false) {
+ return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'resultset has already been freed', __FUNCTION__);
+ } elseif (is_null($this->result)) {
+ return false;
+ }
+ return @mssql_next_result($this->result);
+ }
+
+ // }}}
+ // {{{ 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) {
+ $free = @mssql_free_result($this->result);
+ if ($free === false) {
+ return $this->db->raiseError(null, null, null,
+ 'Could not free result', __FUNCTION__);
+ }
+ }
+ $this->result = false;
+ return MDB2_OK;
+ }
+
+ // }}}
+}
+
+// }}}
+// {{{ class MDB2_BufferedResult_mssql
+
+/**
+ * MDB2 MSSQL Server buffered result driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author Frank M. Kromann <frank@kromann.info>
+ */
+class MDB2_BufferedResult_mssql extends MDB2_Result_mssql
+{
+ // {{{ 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 ($this->rownum != ($rownum - 1) && !@mssql_data_seek($this->result, $rownum)) {
+ if ($this->result === false) {
+ return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'resultset has already been freed', __FUNCTION__);
+ } elseif (is_null($this->result)) {
+ return MDB2_OK;
+ }
+ return $this->db->raiseError(MDB2_ERROR_INVALID, null, null,
+ 'tried to seek to an invalid row number ('.$rownum.')', __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()
+ {
+ $numrows = $this->numRows();
+ if (PEAR::isError($numrows)) {
+ return $numrows;
+ }
+ return $this->rownum < ($numrows - 1);
+ }
+
+ // }}}
+ // {{{ numRows()
+
+ /**
+ * Returns the number of rows in a result object
+ *
+ * @return mixed MDB2 Error Object or the number of rows
+ * @access public
+ */
+ function numRows()
+ {
+ $rows = @mssql_num_rows($this->result);
+ if (is_null($rows)) {
+ if ($this->result === false) {
+ return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'resultset has already been freed', __FUNCTION__);
+ } elseif (is_null($this->result)) {
+ return 0;
+ }
+ return $this->db->raiseError(null, null, null,
+ 'Could not get row count', __FUNCTION__);
+ }
+ if ($this->limit) {
+ $rows -= $this->limit -1 + $this->offset;
+ if ($rows < 0) {
+ $rows = 0;
+ }
+ }
+ return $rows;
+ }
+}
+
+// }}}
+// {{{ MDB2_Statement_mssql
+
+/**
+ * MDB2 MSSQL Server statement driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author Frank M. Kromann <frank@kromann.info>
+ */
+class MDB2_Statement_mssql extends MDB2_Statement_Common
+{
+
+}
+
+// }}}
+?>
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