[hibernate-dev] derby support

I am working on enhancing Derby support a little bit, but have run into an issue with their syntax that I am unable to figure out. I was hoping someone on this list was familiar enough with Derby to point me in the right direction. Specifically, I am trying to properly deal with the manner in which Derby (and also DB2 largely) expects columns to be referenced in certain clauses. For example, because Hibernate always aliases columns in the select clause, derby requires that those aliases be used in certain later clauses. The query I am trying to work through right now is as follows: select model0_.name as col_0_0_, count(*) as col_1_0_ from Model model0_ group by model0_.name having count(*) > 1 However, I get errors from Derby when passing this to the DB: ERROR 42X04: Column 'MODEL0_.COL_0_0_' is either not in any table in the FROM list or appears within a join specification and is outside the scope of the join specification or appears in a HAVING clause and is not in the GROUP BY list. If this is a CREATE or ALTER TABLE statement then 'MODEL0_.COL_0_0_' is not a column in the target table. If the having clause is removed, the query parses fine; I have tried various incantations regarding how to define the having clause without avail. This query seems taken almost verbatim from their reference docs, yet I cannot get this to work... http://db.apache.org/derby/docs/10.1/ref/rrefselectexpression.html Any thoughts?