Re: Definitions Needed - AST = Automatic Summary Tables; VSS = Very Strong Suggestion
Date: Sat, 18 Dec 2004 05:16:22 GMT
Message-ID: <G2Pwd.2394$RH4.1195_at_newsread1.news.pas.earthlink.net>
> I am reading through dbdebunk.com. In one article (On system
> Tables <http://www.dbdebunk.com/page/page/622812.htm>), there are a
> couple of terms that I can not find definitions for: AST and VSS.
> Here is the context with the terms marked with asterisks:
>
> "*****ASTs***** are mostly hidden from the users (although you can
> query them directly) and are a showcase for the power of optimization
> and declarative data access, so I say they are good. Also they have
> the potential to remove the data warehouse/data mart split that is
> good and also lessen the advantages of dimensional DBMS systems,
> which, you’ll agree are much further from the RM than SQL. It’s a
> shame that generated columns aren’t as transparent as *****ASTs*****,
> but then you could always restrict access via views to remove the data
> redundancy from the users perspective (and also stop them from trying
> to update generated columns), and at there are much better than
> getting ‘the application’ (now there’s a misnomer) to maintain such
> redundant data.
As in the rewritten subject, I think in the context, AST stands for
Automatic Summary Tables, and not Abstract Syntax Trees as I first wrote.
> SQL stored procedures provide computational completeness in the
The VSS is a very strong suggestion (as found in TTM - The Third
> database. A *****VSS***** if not a prescription?"
-- Jonathan Leffler #include <disclaimer.h> Email: jleffler_at_earthlink.net, jleffler_at_us.ibm.com Guardian of DBD::Informix v2003.04 -- http://dbi.perl.org/Received on Sat Dec 18 2004 - 06:16:22 CET