Re: Nested Relations / RVAs / NFNF

From: erk <>
Date: 27 Oct 2004 08:34:34 -0700
Message-ID: <>

Hi again Marshall - I'm just jumping in haphazardly here.

> So, on a related note, it's a little weird that we use integers as
> keys.

The key is a set of attributes, not the value of those attributes. The "key-ness" of an individual attribute (its membership in one or more of the candidate keys) is orthogonal to its type.

> Integers support e.g. addition, so we are allowed to add
> two keys together. This is nonsensical.

You could say the same about strings or any other type; substring is a string operation, so you could nonsensically take the substring of a "key attribute".

  • erk
Received on Wed Oct 27 2004 - 17:34:34 CEST

Original text of this message