Re: I think that relational DBs are dead. See link to my article inside
Date: 5 Jul 2006 11:05:56 -0700
Message-ID: <1152122756.498282.108300_at_b68g2000cwa.googlegroups.com>
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
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)
> satisfy a specific condition? If it is statically stored in a point in
> time?
WBR,
Dmitry
Received on Wed Jul 05 2006 - 20:05:56 CEST