On Sat, Jun 23, 2007 at 10:33:49PM +0100, Gregory Stark wrote:
> "Martijn van Oosterhout" <[EMAIL PROTECTED]> writes:
> > On Fri, Jun 22, 2007 at 07:38:01PM +0300, Tzahi Fadida wrote:
> >> Let me simplify it in lamer terms.
> >> Basically, you have a cycle in your relations schema. i.e.
> >> rel A
"Martijn van Oosterhout" <[EMAIL PROTECTED]> writes:
> On Fri, Jun 22, 2007 at 07:38:01PM +0300, Tzahi Fadida wrote:
>> Let me simplify it in lamer terms.
>> Basically, you have a cycle in your relations schema. i.e.
>> rel A: att-x, att-y
>> rel B: att-y, att-z
>> rel C: att-z, att-x
>>
>> The
On Fri, Jun 22, 2007 at 07:38:01PM +0300, Tzahi Fadida wrote:
> Let me simplify it in lamer terms.
> Basically, you have a cycle in your relations schema. i.e.
> rel A: att-x, att-y
> rel B: att-y, att-z
> rel C: att-z, att-x
>
> The only way to join these three without loosing a lot of informati
al Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Richard
> Broersma Jr
> Sent: Wednesday, December 06, 2006 1:30 AM
> To: Richard Broersma Jr; General PostgreSQL List
> Subject: Re: [GENERAL] 8.2 contrib. "Full Disjunction"
>
eration.
--
Brandon Aiken
CS/IT Systems Engineer
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Richard
Broersma Jr
Sent: Wednesday, December 06, 2006 1:30 AM
To: Richard Broersma Jr; General PostgreSQL List
Subject: Re: [GENERAL] 8.2 contrib. "Full D
> 1) what is its application?
I guess I found part of my "laymans" answer:
http://www.cs.toronto.edu/~yaron/Presentations/pods2003.ppt#468,39,Example
> 2) how is it used?
Maybe this question should have been, what is the syntax?
Regards,
Richard Broersma Jr.
---(end of b
I see that a new contrib module was added with the release of 8.2:
http://pgfoundry.org/projects/fulldisjunction/
I found this article that describes the set theory behind it:
http://dbpubs.stanford.edu:8090/pub/showDoc.Fulltext?lang=en&doc=1996-58&format=pdf&compression=&name=1996-58.pdf
Most of
