Work a little bit on the setFetchMode()/traversable patch from damz

UPGRADE

@@ -4,3 +4,12 @@
 
 Both methods now accept an optional last parameter $types with binding types of the values passed.
 This can potentially break child classes that have overwritten one of these methods.
+
+## Doctrine\DBAL\Connection#executeQuery
+
+Doctrine\DBAL\Connection#executeQuery() got a new last parameter "QueryCacheProfile $qcp"
+
+## Doctrine\DBAL\Driver\Statement split
+
+The Driver statement was split into a ResultStatement and the normal statement extending from it.
+This seperates the configuration and the retrieval API from a statement.

lib/Doctrine/DBAL/Driver/OCI8/OCI8Statement.php

@@ -19,7 +19,9 @@
 
 namespace Doctrine\DBAL\Driver\OCI8;
 
-use \PDO;
+use PDO;
+use IteratorAggregate;
+use Doctrine\DBAL\Driver\Statement;
 
 /**
  * The OCI8 implementation of the Statement interface.
@@ -27,7 +29,7 @@ use \PDO;
  * @since 2.0
  * @author Roman Borschel <roman@code-factory.org>
  */
-class OCI8Statement implements \IteratorAggregate, \Doctrine\DBAL\Driver\Statement
+class OCI8Statement implements \IteratorAggregate, Statement
 {
     /** Statement handle. */
     protected $_dbh;
@@ -204,8 +206,9 @@ class OCI8Statement implements \IteratorAggregate, \Doctrine\DBAL\Driver\Stateme
     /**
      * {@inheritdoc}
      */
-    public function fetch($fetchStyle = PDO::FETCH_BOTH)
+    public function fetch($fetchStyle = null)
     {
+        $fetchStyle = $fetchStyle ?: $this->_defaultFetchStyle;
         if ( ! isset(self::$fetchStyleMap[$fetchStyle])) {
             throw new \InvalidArgumentException("Invalid fetch style: " . $fetchStyle);
         }
@@ -216,8 +219,9 @@ class OCI8Statement implements \IteratorAggregate, \Doctrine\DBAL\Driver\Stateme
     /**
      * {@inheritdoc}
      */
-    public function fetchAll($fetchStyle = PDO::FETCH_BOTH)
+    public function fetchAll($fetchStyle = null)
     {
+        $fetchStyle = $fetchStyle ?: $this->_defaultFetchStyle;
         if ( ! isset(self::$fetchStyleMap[$fetchStyle])) {
             throw new \InvalidArgumentException("Invalid fetch style: " . $fetchStyle);
         }

tests/Doctrine/Tests/DBAL/Functional/DataAccessTest.php

@@ -303,4 +303,13 @@ class DataAccessTest extends \Doctrine\Tests\DbalFunctionalTestCase
 
         $this->assertEquals(0, count($rows), "no result should be returned, otherwise SQL injection is possible");
     }
+
+    public function testSetDefaultFetchMode()
+    {
+        $stmt = $this->_conn->query("SELECT * FROM fetch_table");
+        $stmt->setFetchMode(\PDO::FETCH_NUM);
+
+        $row = array_keys($stmt->fetch());
+        $this->assertEquals(0, count( array_filter($row, function($v) { return ! is_numeric($v); })), "should be no non-numerical elements in the result.");
+    }
 }
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