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

If you are willing to use the PreparedStatement class instead of Query:

if (entity.getHistory() == null)
    stmt.setNull(6, Types.VARCHAR);
else
    stmt.setString(6, entity.getHistory());

(It is possible that using ?::text in your query string would also work, but I've never done it that way myself.)