This is the same issue as https://hibernate.atlassian.net/browse/HHH-11477 and can be reproduced the same way. That issue is marked as fixed in 5.2.9 but can be reproduced in 5.4.3.

A temporary workaround is to provide a custom dialect remapping CLOB to LongVarcharTypeDescriptor but I'd prefer to use the provided dialect.

Any hint about this?

Thanks