If my unique identifier is all zeros (000000000-0000-0000-00000) is that equvilent to null?

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If my unique identifier is all zeros (000000000-0000-0000-00000) is that equvilent to null?

2007-02-27 12:44:35 · 2 answers · asked by Nina 2 in Computers & Internet ➔ Programming & Design

2 answers

No, it will show up as a 25-character string. The fact that most of them are zeros doesn't make it null. Numerically, many languages would evaluate that as 0, but 0 is not the same as null in most cases.

2007-02-27 13:08:13 · answer #1 · answered by injanier 7 · 0⤊ 0⤋

Basically yes.

You can treat a zero value as having special meaning, like meaning uninitialized. Some programming languages define and identifier UUID_NULLL or GUID_NULL to represent all zeros. No UUID/GUID generation algorithm will generate a value with all zeros.

2007-02-27 21:06:54 · answer #2 · answered by tj 3 · 0⤊ 0⤋