Hi Andrea Boriero,

the String value has "always" been accepted (our UerType implementation is from the year 2008, used with hibernate 3.x, later 4.3, now 5.x).

The problem is, that we have thousands of occurrencies where a String is used, so that it is impossible for us to use Hibernate 5.2.9.

In addition, switching from String to the "real" Object would increase the memory footprint of the query cache parameters dramatically (because the entities need much more space than the String).