>
> Such computations always end up slightly different in some 
> edge cases 
>
I agree.
We can document this fact. Model authors should be aware that they are not 
allowed to use anything but literals. All other functions are used on their 
own risc. I believe that comparition of two integers or strings should work 
stable across all modern platforms.

I still believe database shall not be involved in this process.I do not 
need database to compare two digits. 

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