On Sat, 2007-12-01 at 04:16 +0800, Lincoln Yeoh wrote:
> The people who try to make a database that maps so well with the
> objects in a single particular program are solving a very different
> problem from those of us who use a database partly as a "lingua
> franca" (or "vehicular language") fo
At 03:17 AM 12/1/2007, Jeff Davis wrote:
The impedance mismatch has more to do with the fact that the meaning of
an application's internal data structures changes frequently (through
revisions of the code), while data in a database needs to be consistent
across long periods of time. So, a well-de
On Fri, 2007-11-30 at 14:33 +, Peter Childs wrote:
> Table Inheritance is table structure ie a child table has all the same
> columns as the old one with some added columns that sore specialist
> items. This feature is used heavily used in Table Partitioning.
> Perhaps it should be renamed.
I
On Fri, 2007-11-30 at 21:42 +0800, Lincoln Yeoh wrote:
> --- post follows ---
> by Anonymous Coward on Wed Nov 28, '07 03:23 PM (#21509173)
>
> Speak for your database -- postgresql does.
>
> Postgresql's "table inheritance" is a flawed concept and has nothing to do
> with the *type system*. Rela
On Fri, 2007-11-30 at 16:06 +, Gregory Stark wrote:
> "Lincoln Yeoh" <[EMAIL PROTECTED]> writes:
>
> > The correct way to store types and subtypes in the database is to store them
> > in the columns. In other words, choose attribute VALUES from a TYPE SYSTEM.
> > Nothing else in the relational
"Lincoln Yeoh" <[EMAIL PROTECTED]> writes:
> The correct way to store types and subtypes in the database is to store them
> in the columns. In other words, choose attribute VALUES from a TYPE SYSTEM.
> Nothing else in the relational model needs to be changed. Something like
> this, in hypothetica
On Fri, 30 Nov 2007 21:42:53 +0800
Lincoln Yeoh <[EMAIL PROTECTED]> wrote:
> Hi,
>
> Found this post on Slashdot which I found interesting, any comments?
I wrote a memo about inheritance at the bottom of which there are 2
links to good use of the feature:
http://www.webthatworks.it/d1/page/post
On 30/11/2007, Lincoln Yeoh <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> Found this post on Slashdot which I found interesting, any comments?
--- post follows ---
> by Anonymous Coward on Wed Nov 28, '07 03:23 PM (#21509173)
>
> Speak for your database -- postgresql does.
>
> Postgresql's "table inheri
On Fri, Nov 30, 2007 at 09:42:53PM +0800, Lincoln Yeoh wrote:
> Found this post on Slashdot which I found interesting, any comments?
I think this person is slightly confused.
> Table inheritence doesn't even make sense. Tables are analogous to
> relations.
> All relations are the same type, the
Hi,
Found this post on Slashdot which I found interesting, any comments?
--- post follows ---
by Anonymous Coward on Wed Nov 28, '07 03:23 PM (#21509173)
Speak for your database -- postgresql does.
Postgresql's "table inheritance" is a flawed concept and has nothing to do
with the *type system
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