CoreData XML / SqLite differences
CoreData XML / SqLite differences
- Subject: CoreData XML / SqLite differences
- From: Greg Hoover <email@hidden>
- Date: Wed, 3 May 2006 18:59:47 -0700
I figured I'd test out the difference in speed between an xml
persistent store and sql store. So using the sample Apple code, I
migrated my existing XML store to SQL. Only after doing this I ran
into a crop of exceptions. After a little digging I found that SQL
stores have limitations in terms of multiple threads talking to them
simultaneously. Has anyone else encountered this, and does anyone
have a good workaround? It seems like for consistency, Apple would
enforce the same thing on XML stores, no?
The exceptions I've been receiving are:
Exception raised during posting of notification. Ignored.
exception: _obtainOpenChannel -- NSSQLCore 0x4cabaa0: no database
channel is available
Exception raised during posting of notification. Ignored.
exception: Fetching maximum primary key for entity failed
and the even more interesting:
Exception raised during posting of notification. Ignored.
exception: library routine called out of sequence
Thanks.
-GH
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