Hibernate: How to set NULL query-parameter value with HQL?

Question

How can I set a Hibernate Parameter to \"null\"? Example:

Query query = getSession().createQuery(\"from CountryDTO c where c.status = :status  and c.type =:t         


        

Answer 1

HQL supports coalesce, allowing for ugly workarounds like:

where coalesce(c.status, 'no-status') = coalesce(:status, 'no-status')