Re: I think that relational DBs are dead. See link to my article inside

Hi Cimode,

> But do you treat NULL values?

There is no NULL values as type or something existing in logic level. But this concept is exists. For example. let assume that collection 'table' exists with 2 columns 'name' and 'value'. For example this collection contains one object instance (row). This object (node) has one link to anoter node colored by 'name' and doesn't have a link colored by 'value'. So this row has value for 'name' column and 'NULL' for 'value'.

In inmplementation level such cases handled by using System.DBNull.Value

Also this row can has a link colored as 'value2' which is not visible via collection 'table' but visible via collection 'table2'

> How do you count all instances that
> satisfy a specific condition? If it is statically stored in a point in
> time?

In logic level - by the same way as RDB it does. In implementation (current version) by full scan only. I have plans to implement indexes. It can be done by the same way as current RDBMS it implements.

also objective joins and views are supported on logical level but implemented very dirty yet. (DB has issues with garbage collection of circular referenced nodes)

WBR,
Dmitry Received on Wed Jul 05 2006 - 13:05:56 CDT