Does anybody knows if there is a limit to the string length that can be passed as argument to createSQLQuery

if I print the string before calling query.list();
I get a 1320 long string
and the error:
org.hibernate.MappingException: No Dialect mapping for JDBC type: -1
at org.hibernate.dialect.TypeNames.get(TypeNames.java:56)
at org.hibernate.dialect.TypeNames.get(TypeNames.java:81)
at org.hibernate.dialect.Dialect.getHibernateTypeName(Dialect.java:370)
at org.hibernate.loader.custom.CustomLoader$Metadata.getHibernateType(CustomLoader.java:559)
at org.hibernate.loader.custom.CustomLoader$ScalarResultColumnProcessor.performDiscovery(CustomLoader.java:485)
at org.hibernate.loader.custom.CustomLoader.autoDiscoverTypes(CustomLoader.java:501)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1796)
at org.hibernate.loader.Loader.doQuery(Loader.java:674)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
at org.hibernate.loader.Loader.doList(Loader.java:2213)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
at org.hibernate.loader.Loader.list(Loader.java:2099)
at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:289)
at org.hibernate.impl.SessionImpl.listCustomQuery(SessionImpl.java:1695)
at org.hibernate.impl.AbstractSessionImpl.list(AbstractSessionImpl.java:142)
at org.hibernate.impl.SQLQueryImpl.list(SQLQueryImpl.java:152)

Note that the string seems to be parsed ok because if I do not set the : specified parameters or if I set a non existent one, I get a proper error:
org.hibernate.QueryException: Not all named parameters have been set: [m_date] ... <full query printed here>
or
org.hibernate.QueryParameterException: could not locate named parameter [m1_date]

and if I put some additional character at the end of the query so String myQuery += " ww";
org.hibernate.exception.SQLGrammarException: could not execute query ...
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ww' at line 1

Of course if I copy paste my query in a MySQL client CLI I get the proper result OK

So seems like there is something else and of course I can not reduce the size of the query string artificially/easily

for your information I managed to get the real problem and its solution
It did not concern the query length at all but only the fact that my query contained a union
for which Hibernate does not really know what that should be associated to the different returned fields

The solution consists in calling
query.addScalar("dep_name", Hibernate.STRING).addScalar("db_id", Hibernate.BIG_INTEGER).addScalar("name", Hibernate.STRING).addScalar("size", Hibernate.BIG_INTEGER).addScalar("installed_size", Hibernate.BIG_INTEGER).addScalar("fullname", Hibernate.STRING);
before any
query.setParameter(...)
& query.list(...)