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From "Jean T. Anderson" <...@bristowhill.com>
Subject Re: INTERSECT and EXCEPT Design
Date Mon, 28 Feb 2005 23:47:44 GMT
Jack Klebanoff wrote:
> RPost wrote:  
>> ...
>> Anyway, I think you meant to compare UNION (or UNION ALL) and 
>> INTERSECT here (as you did EXCEPT/INTERSECT below this) to illustrate 
>> the higher precedence of INTERSECT.
>>
> Yes. I included the UNION/UNION ALL example because it is important to 
> get the associativity right even in the UNION case. I have updated my 
> paper (attached) to say so explicitly, and include an example with UNION 
> and EXCEPT.
...
It's now here: 
http://incubator.apache.org/derby/papers/Intersect-design.html

  -jean

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