title: Invalid HEX number while inserting UUID
body: <p>In oracle I have a DOC_ID column</p>
  
  <pre><code>RAW(16) for my UUID/GUID
  </code></pre>
  
  <p>in hibernate I mapped it this way</p>
  
  <pre><code>@ID
  @GeneratedValue(Generator= "uuid")
  @GenericGenerator(name="uuid", strategy="uuid2")
  @Type(type="uuid-char")
  @Column(name="DOC_ID", unique= true)
  private UUID id;
  </code></pre>
  
  <p>during insertion, it keeps complaining ORA-01465: invalid hex number.</p>
  
  <p>May I know what is that issue?</p>