title: Quote identifiers issue with Symfony2 and postgres
body: <p>I have a problem with symfony2 and postgres. I have a database with tables and sequences in uppercase, that I cannot modify.</p>
  
  <p>I have generated the entities (reverse engineering), quoting the identifiers, and when I trying to do any type of modification (php app/console doctrine:schema:update --force), it returns the error:</p>
  
  <p><strong>[PDOException]
    SQLSTATE[42P01]: Undefined table: 7 ERROR:  no existe la relación «base_id_se
    q»
    LINE 1: SELECT min_value, increment_by FROM BASE_id_seq</strong></p>
  
  <p>The code of my Base Entity is:</p>
  
  <pre><code>namespace Slip\CoreBundle\Entity;
  
  use Doctrine\ORM\Mapping\ClassMetadata;
  use Doctrine\ORM\Mapping as ORM;
  use Doctrine\Common\Collections\ArrayCollection;
  use Slip\ContactBundle\Entity\Criterion;
  /**
   * Slip\CoreBundle\Entity\Base
   *
   * @ORM\Entity(repositoryClass="Slip\CoreBundle\Repository\BaseRepository")
   * @ORM\Table(name="""BASE""")
   */
  class Base
  {
      /**
       * @var bigint $id
       * 
       * @ORM\Column(name="id", type="bigint", nullable=false)
       * @ORM\Id
       * @ORM\GeneratedValue(strategy="SEQUENCE")
       * @ORM\SequenceGenerator(sequenceName="""BASE_id_seq""", allocationSize=1, initialValue=1)
       */
      private $id;
      /**
       * @var string $name
       * @ORM\Column(name="name", type="string", length=1024, nullable=false)
       */
      private $name;
  </code></pre>
  
  <p>..............</p>
  
  <p>If I change the name of the sequences to lowercase all works, and the modifications are applied to the database, but I cannot do it in production enviroment</p>
  
  <p>I don´t understand why if I do any modification in the database, in other tables that aren´t the BASE table appears this error.</p>
  
  <p>Thanks for your collaboration.</p>