org.hibernate.MappingException :No Dialect mapping for JDBC type: -9 [duplicate]

Answer 1

It's the problem of hibernate mapping types.

you can extends a dialect. eg:

public class SQLServerDialectOverrider extends SQLServerDialect{
    public SQLServerDialectOverrider() {
        super();
        registerHibernateType(Types.NVARCHAR, Hibernate.STRING.getName());
        registerHibernateType(Types.LONGVARCHAR, Hibernate.TEXT.getName());
    }
}

Use this class as the dialect class.

Answer 2

I changed the query and explicitly cast it to varchar and it worked.......

String myquery = "select cast(t2.name as varchar) column_name from sys.objects t1 inner join sys.columns t2 on t2.object_id = t1.object_id"+
" left join sys.indexes t3 on t3.object_id = t1.object_id and t3.is_unique = 1 left join sys.index_columns t4 on t4.object_id = t1.object_id and t4.index_id = t3.index_id and t4.column_id = t2.column_id where (upper(t1.type) = 'U' or upper(t1.type) = 'V') and upper(schema_name(t1.schema_id)) = 'dbo' and upper(t1.name) = 'TEST'"; 

Answer 3

This issue occurs if you are accessing the database table data in the different format on which its store in database Example: in data base column type is "nvarchar" and you are accessing data as a string via hibernate. To avoid this you can add scalar in hibernate which will explicitly cast the column data as per requirement. scalar can be added in java while executing the query also in the hbm.xml file.