Re: What's the use of the Z_UUID in the Z_METADATA table?
Re: What's the use of the Z_UUID in the Z_METADATA table?
- Subject: Re: What's the use of the Z_UUID in the Z_METADATA table?
- From: "Marcelo Alves" <email@hidden>
- Date: Wed, 13 Aug 2008 11:44:06 -0300
2008/8/13 Gustavo Vera <email@hidden>:
> Maybe I should not, but I'm doing it anyway :D
> I'm looking inside and also I'm manipulating the structure and data of the
> sqlite file since about 200 revisions in my project. I'm doing this to
> provide newer versions of the app that has the possibility of performing
> database migrations / upgrades from older versions of the app if available.
> With the new functionalities, occasionally a change in the database
> structure results necessary, and when the change is simple (for example,
> just adding a new attribute to an entity) altering the data model and the
> data structures in an old sqlite is far easier and faster than implementing
> the migration functionality suggested in the documentation. In fact, I think
> this is faster and easier even when more complex changes are necessary.
> Anyway... I was wondering if I should take care of the Z_UUID during the
> perform of this upgrades, or if I can just ignore it. I'm currently ignoring
> it... can this become a problem in the future?
Well, I'm not a Core Data expert, but locking yourself to sqlite
engine does not look correct to me. Apple can add/remove/change
persistent stores anytime. And remember, Core Data is a object graph
management framework, not a database.
:: marcelo.alves
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