[web2py] Unsigned int in DAL

[Joseph.Piron]

Hi all!

I have quite a problematic issue, I would like to know how to define a 
Field as unsigned in the DAL ?
I tested:
    Field('triggerValue', 'unsigned integer', requires=IS_NOT_EMPTY(),notnull
=True),
and 
    Field('triggerValue', 'integer', unsigned=True, 
requires=IS_NOT_EMPTY(),notnull
=True),

But it does not work. 
Could someone please enlighten me ? :D

Thanks in advance !!!

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