Re: Sequential UUID Generation

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От
Tomas Vondra
Тема
Re: Sequential UUID Generation
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1a4e6c4b-93c9-4d6b-2e5c-91e4de9a5207@2ndquadrant.com
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Sequential UUID Generation Uday Bhaskar V <uday.bhaskar579@gmail.com>
Re: Sequential UUID Generation Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: Sequential UUID Generation Uday Bhaskar V <uday.bhaskar579@gmail.com>
Re: Sequential UUID Generation Adam Brusselback <adambrusselback@gmail.com>
Re: Sequential UUID Generation Sehrope Sarkuni <sehrope@jackdb.com>
Re: Sequential UUID Generation Uday Bhaskar V <uday.bhaskar579@gmail.com>
Re: Sequential UUID Generation Tomas Vondra <tomas.vondra@2ndquadrant.com>
On 11/19/18 2:08 PM, Uday Bhaskar V wrote:
> I tried below function as which can be used as default to column. But 
> every time we need to created 2 sequences, 1st one takes care of the 
> first 8 bytes and 2nd takes care of the 2nd part of the UUID. I have not 
> tested index and space utilization. I have to examine this. This might 
> not be completely unique in the nature. but still trying for the best.
> 

I got a bit bored a couple of days ago, so I wrote an extension 
generating UUIDs based on either a sequence or timestamp. See

   https://blog.2ndquadrant.com/sequential-uuid-generators/

for an explanation and some simple test results.


regards

-- 
Tomas Vondra                  http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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