On 3/5/10 5:52 PM, Mark Sanvitale said: >However, my experience seems to demonstrates that the statement "We (the >system) cannot necessarily translate "arbitrary" predicates into SQL >queries" is also true,
It definitely is. >and I believe this concept should be expanded to >spell out exactly what generally legal predicates end up being illegal >when applying them to a Core Data context that is backed by SQL. The >only expanded discussion I can find on this subject in the official docs >is, "predicates that rely on Cocoa cannot work", which, for me, does not >shed enough light on the subject. I agree the docs are weak here. I haven't looked in a while, but I don't recall seeing a list of which types of predicate don't with the SQL store. I've found this frustrating as I, like you, know nothing of SQL. The tools are also weak here. I don't know of any way for the compiler or static analysis tool to warn when a predicate will not work. But you'll find out at run time. :) In my case, it was painful because we switched from the XML store to the SQL store and it took a while to shake out all the 'bad' predicates. -- ____________________________________________________________ Sean McBride, B. Eng s...@rogue-research.com Rogue Research www.rogue-research.com Mac Software Developer Montréal, Québec, Canada _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
