https://stackoverflow.com/questions/35930600/how-to-use-native-sql-function-with-hql-query
https://stackoverflow.com/questions/6113167/hibernate-3-6-registerfunction-in-sql-dialect-not-working
https://stackoverflow.com/questions/12004365/how-to-get-hibernate-to-print-out-whats-wrong-with-a-named-query