On 8/25/06, Andrus Adamchik <[EMAIL PROTECTED]> wrote:
On Aug 23, 2006, at 11:35 PM, Mike Kienenberger wrote: > Here's where I'm finding that I need outer joins: > > 1) If two qualifiers for a non-mandatory relationship path are or'd > together. This is also what Øyvind Harboe reported. It may be that > the non-mandatory part is irrelevent. > > 2) If using noMatchExp on a non-null value for a non-mandatory > relationship path. Thanks Mike - that makes sense. I think "non mandatory" part is relevant. Not sure that we need to catch it though. IMO this should be left as an exercise to the user.
I could really do with having this exercise clearly formulated in doc/wiki... I have a hard time explaining my peers what precisely it is that they should be looking for. Also, how do I know that I've got the complete list of gotchas? Is it in theory possible to detect this during runtime? It would be nice to be able to add some runtime checks that generated expressions aren't running into this problem. -- Øyvind Harboe http://www.zylin.com
