Re: Database schema for univesal usage
From: Kenneth Downs <knode.wants.this_at_see.sigblock>
Date: Mon, 30 May 2005 21:18:32 -0400
Message-Id: <6oqsm2-c2t.ln1_at_pluto.downsfam.net>
> data
>
>
> I would have to say that it's both. It's functional, but one of the
> functions is to present itself like a document.
>
> The compilers, and the SQL DDL executor (my name, not theirs), can all
> reference the data dictionary to resolve
> dictionary references in the source code or the DDL. (You'll pardon me,
> but I view SQL DDL as "source code").
>
> However, the dictionary is typically not needed at runtime. Exception:
> DEC
> Datatrieve, which resolves every data name the user enters via the
> dictionary.
>
> The dictionary can contain "database entries", which point to a database.
> The entire database metadata can be construed as a "subdictionary" based
> on
> this entry, provided you are willing to do some mental gymnastics, and be
> tolerant of the engineers.
>
> The DEC Data Dictionary was possibly the most misunderstood product within
> the DEC community.
Date: Mon, 30 May 2005 21:18:32 -0400
Message-Id: <6oqsm2-c2t.ln1_at_pluto.downsfam.net>
David Cressey wrote:
>
> "Kenneth Downs" <knode.wants.this_at_see.sigblock> wrote in message
> news:haerm2-nfr.ln1_at_pluto.downsfam.net...
>
>> This is the part of this that confuses me. In this Dec system, is the
> data
>> dictionary functional, meaning that the computer is making us of it, or >> is it documentational, like a word processing document?
>
>
> I would have to say that it's both. It's functional, but one of the
> functions is to present itself like a document.
>
> The compilers, and the SQL DDL executor (my name, not theirs), can all
> reference the data dictionary to resolve
> dictionary references in the source code or the DDL. (You'll pardon me,
> but I view SQL DDL as "source code").
>
> However, the dictionary is typically not needed at runtime. Exception:
> DEC
> Datatrieve, which resolves every data name the user enters via the
> dictionary.
>
> The dictionary can contain "database entries", which point to a database.
> The entire database metadata can be construed as a "subdictionary" based
> on
> this entry, provided you are willing to do some mental gymnastics, and be
> tolerant of the engineers.
>
> The DEC Data Dictionary was possibly the most misunderstood product within
> the DEC community.
Thanks for the reply. Wish I'd seen that DEC system.
-- Kenneth Downs Secure Data Software, Inc. (Ken)nneth_at_(Sec)ure(Dat)a(.com)Received on Tue May 31 2005 - 03:18:32 CEST