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From Andrus Adamchik <>
Subject Re: joint prefetching narrows result set
Date Thu, 20 Apr 2006 06:27:30 GMT

On Apr 20, 2006, at 4:28 AM, Bryan Lewis wrote:

> Maybe it's common knowledge that one shouldn't specify a joint  
> prefetch
> on such a relationship?  (The old non-joint prefetch with its separate
> query didn't cause any trouble, of course.)  I didn't see this  
> discussed
> in the user guide.  It's not a big deal but I thought I'd mention  
> it in
> case I'm doing something wrong or it's not common knowledge.


It is mentioned briefly in the new docs (last item under prefetching  
hints) -

This is a totally arbitrary limitation. In the following releases  
we'll add support for the outer joins and this will become a non-issue.


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