Create queryBuilder from parts.

lib/Doctrine/ORM/EntityManager.php

@@ -351,6 +351,28 @@ public function createQueryBuilder()
         return new QueryBuilder($this);
     }
 
+    /**
+     * Create a QueryBuilder instance from DQL parts
+     *
+     * @param array $parts
+     *
+     * @return QueryBuilder
+     */
+    public function setDQLParts(array $parts = array())
+    {
+        $queryBuilder = new QueryBuilder($this);
+        foreach ($parts as $name => $part)
+        {
+            if ($part) {
+                if (is_array($part) && $name != 'join') {
+                    $part = current($part);
+                }
+                $queryBuilder->add($name, $part);
+            }
+        }
+        return $queryBuilder;
+    }
+
     /**
      * Flushes all changes to objects that have been queued up to now to the database.
      * This effectively synchronizes the in-memory state of managed objects with the

tests/Doctrine/Tests/ORM/EntityManagerTest.php

@@ -67,6 +67,16 @@ public function testCreateQueryBuilder()
         $this->assertInstanceOf('Doctrine\ORM\QueryBuilder', $this->_em->createQueryBuilder());
     }
 
+    public function testSetDQLParts()
+    {
+        $q = $this->_em->createQueryBuilder()
+            ->select('u')
+            ->from('Doctrine\Tests\Models\CMS\CmsUser', 'u')
+            ->where('u.username = test');
+        $q2 = $this->_em->setDQLParts($q->getDQLParts());
+        $this->assertEquals($q->getDQL(), $q2->getDQL());
+    }
+
     public function testCreateQueryBuilderAliasValid()
     {
         $q = $this->_em->createQueryBuilder()