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  3. December 2020

Re: The age-old database design question - Integers or GUID/UUID for primary keys ? What are your thoughts ?

On 12/14/20 10:37 AM, Peter Dow wrote:
Pre-checking for existence doesn't always work. If you have a bunch of jobs adding to the file at the same time, there's a pretty good chance that between the time you pre-check and when you write the record, that some other job may beat you to the write.

So have your identifier factory set up in such a way that calling it puts an exclusive lock on something, that the calling program then has to explicitly release once the new record has been written.

--
JHHL

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