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Re: db design question

From: "Jules Alberts" <jules(dot)alberts(at)arbodienst-limburg(dot)nl>
To: pgsql-novice(at)postgresql(dot)org
Subject: Re: db design question
Date: 2002-10-22 07:14:22
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Lists: pgsql-novice
On 21 Oct 2002 at 8:44, Josh Berkus wrote:

Hello Josh,

> > sequence and use nextval() primary keys for every table. Someone 
> > recommended a book (Pascal: practical issues in db management). I've 
> > ordered it and will read it, hope it will help me make up my mind.
> Me.  Unfortunately, it won't help you make up your mind on the OID vs.
> Sequence issue.

That's not a problem. I saw some articles from Pascal on the web, and 
I'm sure his book will be valuable anyway.

>   The reason I reccomended it is that Pascal is a real
> fanatic about the relational database model, and gives you
> a) detailed explanations of why it's dangerous* to get creative with
> the relational model, and 
> b) suggestions for how to do a lot of complex things *within* the
> relational model.
> OID vs. sequence is strictly a PostgreSQL implementation issue, and
> even the core developers are divided on the issue, though it's 3 to 1
> against the last time I saw this argued out.

I guess that's 3:1 against OID? Well, I'm beginning to be convinced not 
to use OID (Andrew, thanks for your posting too).

So let's say I don't use OID. Is a SEQUENCE bound to several tables the 
best solution? Any other suggestions?

> *not to say that you should *never* get creative -- though Pascal
> thinks you shouldn't -- just that it's very important to know the
> penalties involved.

I don't _want_ to be creative, not in this db anyway :). I want 
everything to be as standard as possible, as solid as possible.

The way I'm struggling to solve this issue makes me wonder if I'm not 
making a huge design mistake. OTOH I cant imaging that I'm the first 
one to encounter this. I guess the issue is

	a one to many relationship where "one" can be any table in the db

How does one solve this in a relational model? Sorry if I keep going on 
about this, but I have a hunch that this is _very_ important for my db. 
If I don't solve it correctly, I'm sure I will be in a lot of trouble 
later on.


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