title: Hibernate ERROR: missing FROM-clause entry
body: <p>This is my entity class:</p>
  
  <pre><code>@Entity
  @Table(name = "authdata")
  public class AuthData  {
  
  
      @Id
      @Column(name = "login")
      private String login;
  
      @Column(name = "password")
      private String password;
  
      @Column(name = "email;")
      private String email;
  
      public AuthData() {
  
      }
  </code></pre>
  
  <p>This is my DAO:</p>
  
  <pre><code>@Override
  public AuthData get() {
      return (AuthData) sessionFactory.getCurrentSession()
              .createQuery("from AuthData").uniqueResult();
  }
  </code></pre>
  
  <p>This will happen, if I run <code>get()</code> method:</p>
  
  <blockquote>
    <p>org.postgresql.util.PSQLException: ERROR: missing FROM-clause entry
    for table "authdata0_"</p>
  </blockquote>
  
  <p>What is wrong? <code>authdata</code> table exists. </p>