title: Manage String id sequence in spring boot entity
body: <p>I'm working on oracle database to manage a JPA entity with a String Primary key.
  I cannot modify the type on the PK to a Long or int in the database, so i want to know how to configure the pk sequence in my JPA entity, 
  i've tried this : </p>
  
  <pre><code>@Id
  @SequenceGenerator(name="SEQ_ID", sequenceName = "SEQ_ID" )
  @GeneratedValue(strategy=GenerationType.SEQUENCE, generator="SEQ_ID")
  @Column(name="SEQ_ID",unique=true, nullable = false,updatable = false)
  private String id;
  </code></pre>
  
  <p>but when persisting a new entity i got the error : Unknown integral data type for ids : java.lang.String
  someone can help me please ?</p>