Mapping unsigned value (UInt32, UInt64)

Eazy79 · **Joined:** Wed May 28, 2008 5:19 am **Posts:** 2

Hi,

just started using hbn as my OR Mapper but I'm just a little bit confused right now. Why is it not possible to use any unsigned values for MySQL or MSSQL 2005 Dialects? Every time I use a property, wich is a unsigned value, hbn throws an exception:

Error creating context '/hbntest': Dialect does not support DbType.UInt64

or

Error creating context '/hbntest': Dialect does not support DbType.UInt64

netherless if I'm using NHibernate.Dialect.MsSql2005Dialect or NHibernate.Dialect.MySQLDialect. But both dbs support unsigned values. What am I missing?

Eazy79 · **Joined:** Wed May 28, 2008 5:19 am **Posts:** 2

Nobody knows?

glenpeterson · **Joined:** Mon Jul 28, 2008 4:36 pm **Posts:** 24

I just asked again. It's Java that does not support unsigned types.

"All integral types represent signed numbers, there is no 'unsigned' keyword as there is in C and C++... When doing integer arithmetic, you simply must ensure that the type you are using has a sufficient range for the purposes you intend."
Source: Java in a Nutshell, 3rd Edition, by David Flanagan, Pub. O'Reilly, pp. 24-25

http://forum.hibernate.org/viewtopic.php?p=2397200