Persisting UUID in PostgreSQL using JPA

Question

I\'m trying to persist an entity in PostgreSQL that uses UUID as primary key. I\'ve tried persisting it as a plain UUID:

@Id
@Column(name = \"customer_id\")
         


        

Answer 1

The PostgreSQL JDBC driver has chosen an unfortunately way to represent non-JDBC-standard type codes. They simply map all of them to Types.OTHER. Long story short, you need to enable a special Hibernate type mapping for handling UUID mappings (to columns of the postgres-specific uuid datatype):

@Id
@Column(name = "customer_id")
@org.hibernate.annotations.Type(type="org.hibernate.type.PostgresUUIDType")
private UUID id;

or more succinctly:

@Id
@Column(name = "customer_id")
@org.hibernate.annotations.Type(type="pg-uuid")
private UUID id;

Another (better) option is to register org.hibernate.type.PostgresUUIDType as the default Hibernate type mapping for all attributes exposed as java.util.UUID. That is covered in the documentation @ http://docs.jboss.org/hibernate/orm/4.1/manual/en-US/html/ch06.html#types-registry