PostgreSQL JDBC Null String taken as a bytea

Question

If entity.getHistory() is null following code snippet:

(getEntityManager() returns spring injected EntityManager, database field history type is: text or varchar2(20

Answer 1

I had the same problem executing an UPDATE with Oracle Database. Sometimes a few fields that are updated are null and this issue occurs. Apparently JPA is casting my null value into bytea as already spoke in this topic.

I give up of using the Query object to update my table and used the EntityManager.merge(Entity) method.

I simply create the Entity object with all informations and when I execute the merge(Entity), the JPA executes a SELECT, compares the information already persisted on the Data Base with my Entity object and executes the UPDATE correctly. That is, JPA create a "field = NULL" sentence for the Entity variables that are null.