183 lines
7.3 KiB
PHP
183 lines
7.3 KiB
PHP
<?php
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/*
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* $Id$
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.phpdoctrine.com>.
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*/
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Doctrine::autoload('Doctrine_Connection');
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/**
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* Doctrine_Connection_Mssql
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*
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* @package Doctrine
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
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* @author Lukas Smith <smith@pooteeweet.org> (PEAR MDB2 library)
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* @version $Revision$
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* @category Object Relational Mapping
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* @link www.phpdoctrine.com
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* @since 1.0
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*/
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class Doctrine_Connection_Mssql extends Doctrine_Connection
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{
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/**
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* @var string $driverName the name of this connection driver
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*/
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protected $driverName = 'Mssql';
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/**
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* the constructor
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*
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* @param Doctrine_Manager $manager
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* @param PDO $pdo database handle
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*/
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public function __construct(Doctrine_Manager $manager, $adapter)
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{
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// initialize all driver options
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$this->supported = array(
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'sequences' => 'emulated',
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'indexes' => true,
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'affected_rows' => true,
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'transactions' => true,
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'summary_functions' => true,
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'order_by_text' => true,
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'current_id' => 'emulated',
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'limit_queries' => 'emulated',
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'LOBs' => true,
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'replace' => 'emulated',
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'sub_selects' => true,
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'auto_increment' => true,
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'primary_key' => true,
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'result_introspection' => true,
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'prepared_statements' => 'emulated',
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);
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parent::__construct($manager, $adapter);
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}
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/**
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* quoteIdentifier
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* Quote a string so it can be safely used as a table / column name
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*
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* Quoting style depends on which database driver is being used.
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*
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* @param string $identifier identifier name to be quoted
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* @param bool $checkOption check the 'quote_identifier' option
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*
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* @return string quoted identifier string
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*/
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public function quoteIdentifier($identifier, $checkOption = false)
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{
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if ($checkOption && ! $this->options['quote_identifier']) {
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return $identifier;
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}
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return '[' . str_replace(']', ']]', $identifier) . ']';
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}
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/**
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* returns the next value in the given sequence
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*
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* @param string $sequence name of the sequence
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* @return integer the next value in the given sequence
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*/
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public function nextId($sequence)
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{
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$sequenceName = $this->quoteIdentifier($this->getSequenceName($seqName), true);
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$seqcolName = $this->quoteIdentifier($this->getAttribute(Doctrine::ATTR_SEQCOL_NAME), true);
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$query = 'INSERT INTO ' . $sequenceName . ' (' . $seqcolName . ') VALUES (0)';
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$result = $this->exec($query);
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$value = $this->dbh->lastInsertId();
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if (is_numeric($value)) {
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$query = 'DELETE FROM ' . $sequenceName . ' WHERE ' . $seqcolName . ' < ' . $value;
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$result = $this->exec($query);
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}
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return $value;
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}
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/**
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* Adds an adapter-specific LIMIT clause to the SELECT statement.
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* [ borrowed from Zend Framework ]
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*
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* @param string $query
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* @param mixed $limit
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* @param mixed $offset
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* @link http://lists.bestpractical.com/pipermail/rt-devel/2005-June/007339.html
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* @return string
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*/
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public function modifyLimitQuery($query, $limit, $offset, $isManip = false)
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{
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if ($limit > 0) {
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// we need the starting SELECT clause for later
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$select = 'SELECT ';
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if (preg_match('/^[[:space:]*SELECT[[:space:]]*DISTINCT/i', $query, $matches) == 1) {
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$select .= 'DISTINCT ';
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}
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$length = strlen($select);
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// is there an offset?
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if (! $offset) {
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// no offset, it's a simple TOP count
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return $select . ' TOP ' . $limit . substr($query, $length);
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}
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// the total of the count **and** the offset, combined.
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// this will be used in the "internal" portion of the
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// hacked-up statement.
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$total = $limit + $offset;
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// build the "real" order for the external portion.
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$order = implode(',', $parts['order']);
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// build a "reverse" order for the internal portion.
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$reverse = $order;
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$reverse = str_ireplace(" ASC", " \xFF", $reverse);
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$reverse = str_ireplace(" DESC", " ASC", $reverse);
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$reverse = str_ireplace(" \xFF", " DESC", $reverse);
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// create a main statement that replaces the SELECT
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// with a SELECT TOP
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$main = $select . ' TOP ' . $total . substr($query, $length);
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// build the hacked-up statement.
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// do we really need the "as" aliases here?
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$query = 'SELECT * FROM ('
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. 'SELECT TOP ' . $count . ' * FROM (' . $main . ') AS select_limit_rev ORDER BY '. $reverse
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. ') AS select_limit ORDER BY ' . $order;
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}
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return $query;
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}
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/**
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* Returns the autoincrement ID if supported or $id or fetches the current
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* ID in a sequence called: $table.(empty($field) ? '' : '_'.$field)
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*
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* @param string $table name of the table into which a new row was inserted
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* @param string $field name of the field into which a new row was inserted
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* @return integer
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*/
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public function lastInsertID($table = null, $field = null)
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{
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$server_info = $this->getServerVersion();
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if (is_array($server_info)
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&& !is_null($server_info['major'])
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&& $server_info['major'] >= 8) {
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$query = "SELECT SCOPE_IDENTITY()";
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} else {
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$query = "SELECT @@IDENTITY";
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}
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return $this->fetchOne($query);
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}
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}
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