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<?php
/*
* $Id: Db2.php 5798 2009-06-02 15:10:46Z piccoloprincipe $
*
* 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_Db2
*
* @package Doctrine
* @subpackage Connection
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @link www.phpdoctrine.org
* @since 1.0
* @version $Revision: 5798 $
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
*/
class Doctrine_Connection_Db2 extends Doctrine_Connection_Common
{
/**
* Adds an driver-specific LIMIT clause to the query
*
* @param string $query query to modify
* @param integer $limit limit the number of rows
* @param integer $offset start reading from given offset
* @return string the modified query
*/
public function modifyLimitQuery($query, $limit = false, $offset = false, $isManip = false)
{
if ($limit <= 0)
return $query;
if ($offset == 0) {
return $query . ' FETCH FIRST '. $limit .' ROWS ONLY';
} else {
$sqlPieces = explode('from', $query);
$select = $sqlPieces[0];
$table = $sqlPieces[1];
$col = explode('select', $select);
$sql = 'WITH OFFSET AS(' . $select . ', ROW_NUMBER() ' .
'OVER(ORDER BY ' . $col[1] . ') AS doctrine_rownum FROM ' . $table . ')' .
$select . 'FROM OFFSET WHERE doctrine_rownum BETWEEN ' . $offset .
'AND ' . ($offset + $limit - 1);
return $sql;
}
}
}
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