In the latest Hibernate release there is an IN padding feature that is enabled by setting the "hibernate.query.in_clause_parameter_padding" property to true. Unfortunately from what I've been able to see it doesn't work. Turning the new property on doesn't do anything and the IN values are not padded.

I know that there are a bunch of functional tests that prove this feature is working, but in the integration tests I can't seem to verify this positively. It is pretty hard to verify it using an automated test but I've tried my best to prove that the padding is not taking place. I've used jdbcdslog to log and assert the output queries that are executed against the in-memory db.

Please check the validity of the attached tests and if they are valid, please fix the error. If the tests are invalid, please point out what am I doing wrong.