call fetchAllAssociative for a result set

`fetchAllAssociative()` is not available for class "Doctrine\DBAL\Statement"

Author: ghertko

doctrine.rst

@@ -848,10 +848,10 @@ In addition, you can query directly with SQL if you need to::
                 ORDER BY p.price ASC
                 ';
             $stmt = $conn->prepare($sql);
-            $stmt->executeQuery(['price' => $price]);
+            $resultSet = $stmt->executeQuery(['price' => $price]);
 
             // returns an array of arrays (i.e. a raw data set)
-            return $stmt->fetchAllAssociative();
+            return $resultSet->fetchAllAssociative();
         }
     }