pg.ddx.io  pgsql-sql@postgresql.org mailing list archive  

help / color / mirror / Atom feed

From: Yeb Havinga <yebhavinga@gmail.com>
To: Leif Biberg Kristensen <leif@solumslekt.org>
Cc: pgsql-sql@postgresql.org
Subject: Re: Table Design for Hierarchical Data
Date: Mon, 12 Apr 2010 17:37:58 +0200
Message-ID: <4BC33E56.3000704@gmail.com> (raw)
In-Reply-To: <201004121730.18837.leif@solumslekt.org>
References: <n2i5ab13581004061033j4ed25734xd0504cb95a1fc092@mail.gmail.com>
	<201004121114.10189.achill@matrix.gatewaynet.com>
	<4BC334E2.6020600@gmail.com>
	<201004121730.18837.leif@solumslekt.org>

Leif Biberg Kristensen wrote:
> On Monday 12. April 2010 16.57.38 Rob Sargent wrote:
>   
>> Believe me: "ego-ma-pa" will correctly define genealogical relationships
>> (at least among humans).
>>     
>
> Yes, but a family tree is not a hierarchical tree as defined in database 
> theory. Believe me: I'm a genealogist.
>   
The last sentence is almost like the 'proof by authority' from 36 
methods of mathematical proof, see e.g. 
http://jwilson.coe.uga.edu/EMT668/EMAT6680.F99/Challen/proof/proof.html.

view thread (24+ messages)  latest in thread

Message-ID: <4BC33E56.3000704@gmail.com>
Permalink:  ../4BC33E56.3000704@gmail.com/
Also on:    postgresql.org/message-id/4BC33E56.3000704@gmail.com

copy link · copy postgr.es

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: pgsql-sql@postgresql.org
  Cc: yebhavinga@gmail.com, leif@solumslekt.org
  Subject: Re: Table Design for Hierarchical Data
  In-Reply-To: <4BC33E56.3000704@gmail.com>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox