It appears as though Hibernate 3 does not support boolean literals in the select list as required by the JPA spec:

http://e-docs.bea.com/kodo/docs41/full/ ... angref_lit

"The boolean literals are TRUE and FALSE. Although predefined reserved literals appear in upper case, they are case insensitive"

Thus, JPQL queries such as:

"SELECT TRUE FROM Entity e"

Will not parse. A more realistic example is the following:

"SELECT NEW ValueClass(e.x, e.y, TRUE) FROM Entity e"

Which also does not parse.