without explicit casting we do not have the type of the enum, it is just a serializable type and so casted to a Varchar, but in the db the field is a varchar.
Not sure if the solution of my PR [#https://github.com/hibernate/hibernate-orm/pull/1090] is acceptable and/or is it just acceptable to require the explicit cast of the SelectCase.

Steve Ebersole can you give a look at the PR Thanks.