Re: Sets and Lists, again
From: mAsterdam <mAsterdam_at_vrijdag.org>
Date: Tue, 23 May 2006 02:59:02 +0200
Message-ID: <44725d97$0$31637$e4fe514c_at_news.xs4all.nl>
>>I'm working at the logical level where an index holds the ordinal
>>position. This position can be selected just as any attribute (derived
>>or otherwise). There is no renumbering required.
>
> Indexes are physical, not logical.
Date: Tue, 23 May 2006 02:59:02 +0200
Message-ID: <44725d97$0$31637$e4fe514c_at_news.xs4all.nl>
Gene Wirchenko wrote:
> dawn wrote:
>>I'm working at the logical level where an index holds the ordinal
>>position. This position can be selected just as any attribute (derived
>>or otherwise). There is no renumbering required.
>
> Indexes are physical, not logical.
Indices which can be rebuilt on existing stuff (i.e. relations) are redundant, even. What about indices to preserve list order? ("numbered items") They aren't completely redundant. If you lose them you lose the order of the list.
What is physical about them? Received on Tue May 23 2006 - 02:59:02 CEST