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CoreData: Enumerating through very large data sets?

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CoreData: Enumerating through very large data sets?

Subject: CoreData: Enumerating through very large data sets?
From: Jim Correia <email@hidden>
Date: Mon, 13 Mar 2006 12:33:05 -0500

I have a CoreData store (SQL) which has grown organically to be quite large. (Some of the individual rows are also quite large.)

Executing a fetch request to retrieve all of the objects of a particular entity is now painful (both in time and space) since it pulls in all the attributes for each entity.

The documentation says that NSFetchRequest doesn't allow me to batch.

Is it possible to execute the fetch request, but get the objects as faults only? Get all the object IDs for the objects of a particular entity?

Is there some other recommended way to to systematically enumerate all the instances of an entity when the working set is large? (My goal is to migrate the data to a different data model.)

Thanks,
Jim


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