Re: [Cdk-user] storage of the biset obtained with FingerPrint

[schneider <sch...@fr...>]

Thank you for your reply. I am not such that I understand very well your 
explanation : my kownledge in mathematic is not very good (I am only an 
organic chemist  ;-) ).
Thus you cut the 1024 bit fingerprint in 16 fragments and you transform 
them into BitInt. But how can we find the information in these intergers 
without the inverse transformation ?

Best regards,
Jean-Marie

Nina Jeliazkova wrote:

>Hi,
>
>indeed, 16 fileds of MySQL type BigInt unsigned (unsigned is important) make
>1024 bit fingerprint. 16 field is not that big disadvantage, having in mind
>that prescreening can be done on the fly with a single SQL statement.
>
>Regards,
>Nina 
>
>
>Stefan Kuhn <ste...@un...> wrote:
>
>  
>
>>Hi,
>>I'm indeed using MySQL's largest int type (not sure about the name just now)
>>
which is 64. 16 of these make the fingerprint. This is, I think, the

>shortest 
>  
>
>>possible way. Only disadvantage is that you need 16 fields. I also tried to 
>>use a string where every bit is used, but you then end up with control 
>>characters in the string and I could not fully control these.
>>Stefan
>>
>>    
>>