We should able to get the table name unescaped

When we want to perform complex queries to retrieve metadata from the database

src/Wallabag/CoreBundle/Doctrine/WallabagMigration.php

@@ -9,6 +9,8 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
 
 abstract class WallabagMigration extends AbstractMigration implements ContainerAwareInterface
 {
+    const UN_ESCAPED_TABLE = true;
+
     /**
      * @var ContainerInterface
      */
@@ -28,10 +30,14 @@ abstract class WallabagMigration extends AbstractMigration implements ContainerA
         $this->container = $container;
     }
 
-    protected function getTable($tableName)
+    protected function getTable($tableName, $unEscaped = false)
     {
         $table = $this->container->getParameter('database_table_prefix') . $tableName;
 
+        if (self::UN_ESCAPED_TABLE === $unEscaped) {
+            return $table;
+        }
+
         // escape table name is handled using " on postgresql
         if ('postgresql' === $this->connection->getDatabasePlatform()->getName()) {
             return '"' . $table . '"';