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UUID data type
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UUID data type


  • Subject: UUID data type
  • From: Samuel Pelletier <email@hidden>
  • Date: Tue, 22 Mar 2016 10:03:30 -0400

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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