Hi Philip,
IdGeneratorStrategy.SEQUENCE support is implemented on top of
DatastoreService.allocateIds(), which is itself the mechanism that the
datastore uses internally to assign ids. So, all properties of datastore id
allocation apply to SEQUENCE. There is a lot of good information about
these properties in this thread:
http://groups.google.com/group/google-appengine/browse_thread/thread/dec83c2dbd9542e4
But in short, sequences are guaranteed to be unique but not monotically
increasing.
Hope this helps,
Max
On Mon, Dec 21, 2009 at 12:04 AM, Philip Tucker ptuc...@gmail.com wrote:
I'm using IdGeneratorStrategy.SEQUENCE for the primary key of a table,
but it appears AppEngine bounces between 2 different sequence
generators as I create new entries. IDs are unique, but not
monotonically increasing. It's possible I've coded something wrong,
but I'm oretty sure this is a bug.
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