![]() ![]() ![]() Read it, and how it uses various parts to generate the uuid. Some reading material about the uniqueness: Maybe you mean something else? For instance, if you use UUID() to generate somethingthat should be unique (like a primary key, or a Unique field etc), and you've previously added the same number (like for instance you called UUID() once, but inserted something twice), then you'll just get the default error you get when adding non-unique content to a place that should be unique. If it has any potential to collide, its not unique. Values, even if these calls are performed on two separate computers UUID values are unique across tables, databases, and even servers that allow you to merge rows from different databases or distribute databases across servers. Otherwise, your program is simply incorrect. If you generate them randomly, then the probability of collision. Therefore by definition, UUID is not unique, and safe only if you're prepared for potential collisions regardless of chance of collisions. UUIDs are generally not guaranteed to be universally unique. Two calls to UUID() are expected to generate two different If it has any potential to collide, it's not unique. There would be no "regenerate" code available: the function is designed to create unique keys even across computers, so how could it even know its result was not unique?Ī UUID is designed as a number that is globally unique in space and Since I am using a mysql db, the UUIDType is correctly falling back to. It's supposed to be unique and it should be always, as far as I know. useruuid Column(UUIDType(binaryFalse), uniqueTrue, indexTrue, nullableFalse). Well, if you call UUID() twice and get the same results, the most problematic thing would be that "stuff is broken" (tm). UUID() results are intended to be unique, but cannot always be relied upon to unpredictable and unguessable, so should not be relied upon for these purposes. ![]()
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