Added db2 connection driver

lib/Doctrine/Connection/Db2.php

+<?php
+/* 
+ *  $Id$
+ *
+ * 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.com>.
+ */
+Doctrine::autoload('Doctrine_Connection');
+/**
+ * Doctrine_Connection_Db2
+ *
+ * @package     Doctrine
+ * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
+ * @category    Object Relational Mapping
+ * @link        www.phpdoctrine.com
+ * @since       1.0
+ * @version     $Revision$
+ * @author      Konsta Vesterinen <kvesteri@cc.hut.fi>
+ */
+class Doctrine_Connection_Db2 extends Doctrine_Connection {
+    /**
+     * 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, $offset) {
+  		if($limit <= 0)
+  			return $sql;
+
+  		if($offset == 0) {
+  			return $sql . ' FETCH FIRST '. $count .' ROWS ONLY';
+  		} else {
+  			
+  			$sqlPieces = explode('from', $sql);
+  			$select = $sqlPieces[0];
+  			$table = $sqlPieces[1];
+  			
+  			$col = explode('select', $select);
+
+  			$sql = 'WITH OFFSET AS(' . $select . ', ROW_NUMBER() ' .
+  				   'OVER(ORDER BY ' . $col[1] . ') AS dctrn_rownum FROM ' . $table . ')' .
+  				   $select . 'FROM OFFSET WHERE dctrn_rownum BETWEEN ' . $offset .
+  			       'AND ' . ($offset + $count - 1);
+  			return $sql;
+  		}
+    }
+}

lib/Doctrine/Connection/Firebird.php

@@ -105,7 +105,7 @@ class Doctrine_Connection_Firebird extends Doctrine_Connection {
      * @return integer
      */
     public function getNextID($sequence) {
-        $stmt = $this->query("SELECT UNIQUE FROM ".$sequence);
+        $stmt = $this->query('SELECT UNIQUE FROM ' . $sequence);
         $data = $stmt->fetch(PDO::FETCH_NUM);
         return $data[0];
     }