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Thread: N-to-N implementation

N-to-N implementation

From
"Filipe Knoedt"
Date:
Hi all,
 
I'd like to set up a discussion (if necessary) about two different ways to implement N-to-N relationships: using a N-to-N intermediary table or, suppose an A and B tables situation, creating the primary key of the table B with the A.id plus a sequencer.
 
I'm thinking on going the second way, but decided to ask the list if anybody sees any potencial problem in it, like for performance or anything.
 
Filipe Knoedt

Re: N-to-N implementation

From
Oleg Bartunov
Date:
On Thu, 21 Jul 2005, Filipe Knoedt wrote:

> Hi all,
>
> I'd like to set up a discussion (if necessary) about two different ways to implement N-to-N relationships: using a
N-to-Nintermediary table or, suppose an A and B tables situation, creating the primary key of the table B with the A.id
plusa sequencer. 
>
> I'm thinking on going the second way, but decided to ask the list if anybody sees any potencial problem in it, like
forperformance or anything. 

we use contrib/intarray to avoid joining

>
> Filipe Knoedt

     Regards,
         Oleg
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Sternberg Astronomical Institute, Moscow University (Russia)
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