Re-reading your reply, I think I've misunderstood your intent there (I 
didn't realise who the author was). Please disregard my previous reply.

On Sunday, 19 November 2017 09:59:44 UTC+11, Josh Smeaton wrote:
>
> Until you want to aggregate or filter on that calculation, and perform 
> that filtering in the database rather than pulling back millions of records 
> to do so in python. The database *must* be involved.
>
> On Sunday, 19 November 2017 06:32:48 UTC+11, [email protected] 
> wrote:
>>
>> 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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