休眠hql getMaxVersion

Question

I have a table with the following structure:

ReportId
Version
Title
.....

I want to use HQL to fetch the newest version of the report by id. Would the following query work?

from Report where reportId = :reportId and version = (select max(version) from Report where reportId = :reportId)

Is it possible to retrieve the row with the maximum version without using a sub-select? Is the above sub-select even legal in hibernate HQL?

Answer 1

You can order by version and use setMaxResults on the query (set it to 1). As for the other question, subselects like this are legal in hql.

Answer 2

Try this query:

    from Report where reportId = :reportId order by version desc 

with setMaxResults=1