> I know 2**31, I meant the value: 2147483648  :)
> And while the IS_INT_IN_RANGE is fine for negative value (I am already 
> using it) that does not change the fact that is the column is not set as 
> unsigned, 2147483648 can't be saved.
>
 
that's why there's bigint. 

For the deployment, no that's not a solution. We require à fully scripted 
> solution that may be deployed by maintenance guys without knowledge of what 
> they do at anytime.
> And the models evolve between updates.
>
> That was what I was talking about. taking sql.log and script the database 
creation/migrations will save you a lot of troubles if you're going to 
deploy several db in multiple instances
 

> Just out of curiosity, why unsigned it not a default and simple parameter 
> ? (handled only if the backend handles)
>
 
Because noone until now needed it.

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