Re: DAGs and recursive queries

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От Jeff Davis
Тема Re: DAGs and recursive queries
Дата
Msg-id 1190996937.5943.115.camel@dogma.ljc.laika.com
обсуждение исходный текст
Ответ на Re: DAGs and recursive queries  (Gregory Stark <stark@enterprisedb.com>)
Список pgsql-general
On Thu, 2007-09-27 at 23:58 +0100, Gregory Stark wrote:
> It keeps the same information in more than one place. Consider:
>
> 1
> 1.1
> 1.1.1
>
> Note that all three records contain the root's id of "1". If you want to
> reparent 1.1 to be 2.1 you have to know that all its children also need to be
> reparented as well.

Aren't there still some update anomolies with any schema representing a
DAG?

Regards,
    Jeff Davis


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