Hi Samuel, what about using the UUID class [1]?
jw [1] https://docs.oracle.com/javase/8/docs/api/java/util/UUID.html > Am 22.03.2016 um 15:03 schrieb Samuel Pelletier <sam...@samkar.com>: > > Hi, > > I'm working on adding uuid support as primary key with a prototype and ERRest > support. Actually, my implementation uses a 16 bytes NSData as the adaptor > value type. Before going too far in this, I would like to validate my > choices... > > I see 2 options: > > 1- A 16 bytes NSData > > Pro: It seems the most efficient and adapted data type. > Cons: Hard to read and type in SQL queries. GlobalIds are cryptic. > > 2- A 32 char hex string (or a 36 one if pretty printed with the dashes). > > Pro: Easier to read, especially with the dashes. > Cons: Uses more spaces, maybe less fast. Seems a bit awkward to deal > with hex strings. > > > For the ERRest part, I managed to format the uuid in a primary key by > detecting if it is a 16 bytes NSData in the formatted hex representation. I > also found a way to get objects using the hex representation. > > Any though on this ? Something I missed ? > > Finally, is a presentation on using uuid for primary key in next WOWODC would > be a good topic ? > > Samuel
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