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NEWID()


NEWID()

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ningaraju.ne 46825
ningaraju.ne 46825
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Hi All,
I have to know which algorithm is used in NEWID() function or to know how it works internally?



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Ningaraju N E
Koen Verbeeck
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http://en.wikipedia.org/wiki/Globally_unique_identifier


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ningaraju.ne 46825
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Hi Keon,

I Gone through the site,but i failed to get exactly which algorithm used?
Koen Verbeeck
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Why is it so important to know the exact algorithm?


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ningaraju.ne 46825
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Actually we have used newid() in order by clause to do shuffling.But My Manager is asking me to get the algorithm used for that clause and need to compare with linear programming algorithm
Sean Lange
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ningaraju.ne 46825 (8/27/2013)
Actually we have used newid() in order by clause to do shuffling.But My Manager is asking me to get the algorithm used for that clause and need to compare with linear programming algorithm


Well unless your boss has some connections at Microsoft you aren't going to get the logic. This code is compiled into the engine and you don't have the opportunity to view the source code. Does this same manager routinely ask the .NET team to "retrieve" the logic used in the .NET framework for generating a guid?

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Sean Lange (8/27/2013)
ningaraju.ne 46825 (8/27/2013)
Actually we have used newid() in order by clause to do shuffling.But My Manager is asking me to get the algorithm used for that clause and need to compare with linear programming algorithm


Well unless your boss has some connections at Microsoft you aren't going to get the logic. This code is compiled into the engine and you don't have the opportunity to view the source code. Does this same manager routinely ask the .NET team to "retrieve" the logic used in the .NET framework for generating a guid?


+1. I haven't seen any internal algorithms documented well and I doubt you'll see this one.

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I don't have the link for it anymore but I found an MS White Paper on the subject. I believe I found it using "TYPE 4 GUID" as the search and then going through a whole lot of entries.

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