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<?php
/*
* $Id: Mssql.php 6795 2009-11-23 23:25:14Z jwage $
*
* 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 COPYRIGHT
* OWNER 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.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.phpdoctrine.org>.
*/
/**
* Doctrine_Connection_Mssql
*
* @package Doctrine
* @subpackage Connection
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
* @author Lukas Smith <smith@pooteeweet.org> (PEAR MDB2 library)
* @version $Revision: 6795 $
* @link www.phpdoctrine.org
* @since 1.0
*/
class Doctrine_Connection_Mssql extends Doctrine_Connection_Common
{
/**
* @var string $driverName the name of this connection driver
*/
protected $driverName = 'Mssql';
/**
* the constructor
*
* @param Doctrine_Manager $manager
* @param PDO $pdo database handle
*/
public function __construct(Doctrine_Manager $manager, $adapter)
{
// initialize all driver options
$this->supported = array(
'sequences' => 'emulated',
'indexes' => true,
'affected_rows' => true,
'transactions' => true,
'summary_functions' => true,
'order_by_text' => true,
'current_id' => 'emulated',
'limit_queries' => 'emulated',
'LOBs' => true,
'replace' => 'emulated',
'sub_selects' => true,
'auto_increment' => true,
'primary_key' => true,
'result_introspection' => true,
'prepared_statements' => 'emulated',
);
parent::__construct($manager, $adapter);
}
/**
* quoteIdentifier
* Quote a string so it can be safely used as a table / column name
*
* Quoting style depends on which database driver is being used.
*
* @param string $identifier identifier name to be quoted
* @param bool $checkOption check the 'quote_identifier' option
*
* @return string quoted identifier string
*/
public function quoteIdentifier($identifier, $checkOption = false)
{
if ($checkOption && ! $this->getAttribute(Doctrine_Core::ATTR_QUOTE_IDENTIFIER)) {
return $identifier;
}
if (strpos($identifier, '.') !== false) {
$parts = explode('.', $identifier);
$quotedParts = array();
foreach ($parts as $p) {
$quotedParts[] = $this->quoteIdentifier($p);
}
return implode('.', $quotedParts);
}
return '[' . str_replace(']', ']]', $identifier) . ']';
}
/**
* Adds an adapter-specific LIMIT clause to the SELECT statement.
* [ original code borrowed from Zend Framework ]
*
* License available at: http://framework.zend.com/license
*
* Copyright (c) 2005-2008, Zend Technologies USA, Inc.
* All rights reserved.
*
* 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 Zend Technologies USA, Inc. nor the names of its
* 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 COPYRIGHT OWNER 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.
*
* @param string $query
* @param mixed $limit
* @param mixed $offset
* @link http://lists.bestpractical.com/pipermail/rt-devel/2005-June/007339.html
* @return string
*/
public function modifyLimitQuery($query, $limit = false, $offset = false, $isManip = false)
{
if ($limit > 0) {
$count = intval($limit);
$offset = intval($offset);
if ($offset < 0) {
throw new Doctrine_Connection_Exception("LIMIT argument offset=$offset is not valid");
}
$orderby = stristr($query, 'ORDER BY');
if ($orderby !== false) {
// Ticket #1835: Fix for ORDER BY alias
// Ticket #2050: Fix for multiple ORDER BY clause
$order = str_ireplace('ORDER BY', '', $orderby);
$orders = explode(',', $order);
for ($i = 0; $i < count($orders); $i++) {
$sorts[$i] = (stripos($orders[$i], ' desc') !== false) ? 'DESC' : 'ASC';
$orders[$i] = trim(preg_replace('/\s+(ASC|DESC)$/i', '', $orders[$i]));
// find alias in query string
$helper_string = stristr($query, $orders[$i]);
$from_clause_pos = strpos($helper_string, ' FROM ');
$fields_string = substr($helper_string, 0, $from_clause_pos + 1);
$field_array = explode(',', $fields_string);
$field_array = array_shift($field_array);
$aux2 = spliti(' as ', $field_array);
$aux2 = explode('.', end($aux2));
$aliases[$i] = trim(end($aux2));
}
}
// Ticket #1259: Fix for limit-subquery in MSSQL
$selectRegExp = 'SELECT\s+';
$selectReplace = 'SELECT ';
if (preg_match('/^SELECT(\s+)DISTINCT/i', $query)) {
$selectRegExp .= 'DISTINCT\s+';
$selectReplace .= 'DISTINCT ';
}
$fields_string = substr($query, strlen($selectReplace), strpos($query, ' FROM ') - strlen($selectReplace));
$field_array = explode(',', $fields_string);
$aux2 = explode('.', $field_array[0]);
$key_field = trim(end($aux2));
$query = preg_replace('/^'.$selectRegExp.'/i', $selectReplace . 'TOP ' . ($count + $offset) . ' ', $query);
$query = 'SELECT TOP ' . $count . ' ' . $this->quoteIdentifier('inner_tbl') . '.' . $key_field . ' FROM (' . $query . ') AS ' . $this->quoteIdentifier('inner_tbl');
if ($orderby !== false) {
$query .= ' ORDER BY ';
for ($i = 0, $l = count($orders); $i < $l; $i++) {
if ($i > 0) { // not first order clause
$query .= ', ';
}
$query .= $this->quoteIdentifier('inner_tbl') . '.' . $aliases[$i] . ' ';
$query .= (stripos($sorts[$i], 'asc') !== false) ? 'DESC' : 'ASC';
}
}
}
return $query;
}
/**
* return version information about the server
*
* @param bool $native determines if the raw version string should be returned
* @return array version information
*/
public function getServerVersion($native = false)
{
if ($this->serverInfo) {
$serverInfo = $this->serverInfo;
} else {
$query = 'SELECT @@VERSION';
$serverInfo = $this->fetchOne($query);
}
// cache server_info
$this->serverInfo = $serverInfo;
if ( ! $native) {
if (preg_match('/([0-9]+)\.([0-9]+)\.([0-9]+)/', $serverInfo, $tmp)) {
$serverInfo = array(
'major' => $tmp[1],
'minor' => $tmp[2],
'patch' => $tmp[3],
'extra' => null,
'native' => $serverInfo,
);
} else {
$serverInfo = array(
'major' => null,
'minor' => null,
'patch' => null,
'extra' => null,
'native' => $serverInfo,
);
}
}
return $serverInfo;
}
/**
* Checks if there's a sequence that exists.
*
* @param string $seq_name The sequence name to verify.
* @return boolean The value if the table exists or not
*/
public function checkSequence($seqName)
{
$query = 'SELECT * FROM ' . $seqName;
try {
$this->exec($query);
} catch(Doctrine_Connection_Exception $e) {
if ($e->getPortableCode() == Doctrine_Core::ERR_NOSUCHTABLE) {
return false;
}
throw $e;
}
return true;
}
}
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