Re: Hashes from composite keys?

From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Fri, 23 Jul 2010 19:44:29 -0300
Message-ID: <4c4a1b51$0$11849$9a566e8b_at_news.aliant.net>



Karsten Wutzke wrote:
> On Jul 23, 10:14 pm, Karsten Wutzke <kwut..._at_web.de> wrote:
> 

>>Hello,
>>
>>what are the best practices for generating hash codes from composite
>>keys? I need to mimic something like what a composite index does. In
>>fact, it's for mapping between relational keys and object IDs.
>>
>>Can anyone point me into the right direction please?
>>
>>Karsten
> 
> OK one last try. Maybe someone has a good tip where hashing algorithms
> are discussed?

Eric was wrong when he said hashing is an entire subject. Hashing covers several subjects including data compression and data encryption.

Before you go off to create a hash function, I suggest you take a step back from your task to reconsider what you are doing instead of focusing on how to do it.

If you aer adamant on pursuing hash functions at all costs, I can only observe GIYF (google is your friend). Received on Fri Jul 23 2010 - 17:44:29 CDT

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