diff --git a/lib/Doctrine/DBAL/Driver/OCI8/OCI8Connection.php b/lib/Doctrine/DBAL/Driver/OCI8/OCI8Connection.php
index 7ab8d117b..66a02e73d 100644
--- a/lib/Doctrine/DBAL/Driver/OCI8/OCI8Connection.php
+++ b/lib/Doctrine/DBAL/Driver/OCI8/OCI8Connection.php
@@ -32,7 +32,10 @@ class OCI8Connection implements \Doctrine\DBAL\Driver\Connection
     
     public function __construct($username, $password, $db)
     {
-        $this->_dbh = oci_connect($username, $password, $db);
+        $this->_dbh = @oci_connect($username, $password, $db);
+        if (!$this->_dbh) {
+            throw new OCI8Exception($this->errorInfo());
+        }
     }
     
     public function prepare($prepareString)
@@ -74,12 +77,18 @@ class OCI8Connection implements \Doctrine\DBAL\Driver\Connection
     
     public function commit()
     {
-        return oci_commit($this->_dbh);
+        if (!oci_commit($this->_dbh)) {
+            throw OCI8Exception::fromErrorInfo($this->errorInfo());
+        }
+        return true;
     }
     
     public function rollBack()
     {
-        return oci_rollback($this->_dbh);
+        if (!oci_rollback($this->_dbh)) {
+            throw OCI8Exception::fromErrorInfo($this->errorInfo());
+        }
+        return true;
     }
     
     public function errorCode()
diff --git a/lib/Doctrine/DBAL/Driver/OCI8/OCI8Exception.php b/lib/Doctrine/DBAL/Driver/OCI8/OCI8Exception.php
new file mode 100644
index 000000000..66fe615a1
--- /dev/null
+++ b/lib/Doctrine/DBAL/Driver/OCI8/OCI8Exception.php
@@ -0,0 +1,30 @@
+<?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.doctrine-project.org>.
+*/
+
+namespace Doctrine\DBAL\Driver\OCI8;
+
+class OCI8Exception extends \Exception
+{
+    static public function fromErrorInfo($error)
+    {
+        return new self($error['message'], $error['code']);
+    }
+}
diff --git a/lib/Doctrine/DBAL/Driver/OCI8/OCI8Statement.php b/lib/Doctrine/DBAL/Driver/OCI8/OCI8Statement.php
index 184f39e64..b4f3b586b 100644
--- a/lib/Doctrine/DBAL/Driver/OCI8/OCI8Statement.php
+++ b/lib/Doctrine/DBAL/Driver/OCI8/OCI8Statement.php
@@ -137,7 +137,11 @@ class OCI8Statement implements \Doctrine\DBAL\Driver\Statement
             }
         }
         
-        return oci_execute($this->_sth, OCI_DEFAULT);
+        $ret = @oci_execute($this->_sth, OCI_DEFAULT);
+        if (!$ret) {
+            throw OCI8Exception::fromErrorInfo($this->errorInfo());
+        }
+        return $ret;
     }
 
     /**