[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

RE: storing xml files into database

  • From: Chris Parkerson <chrisp@e...>
  • To: 'Bill Lindsey' <bill@b...>, xml-dev@l...
  • Date: Mon, 10 Sep 2001 14:00:22 -0400

storing xml efficiently
It would be nice if we could find an independent entity to benchmark us
all... I think there are enough of us in the XML DB and XML-enabled DB
market now to submit to an independent benchmark ;->  We've been
building ours since 1997 ;->.

We've spent a lot of our own resources on standalone and competitive
benchmarking (well, against the products we can get a hold of... so far,
we've only been able to do that with the RDBMS vendors... the rest of
you XML DB vendors do not have fully-functional evals like we at eXcelon
do ;->).

If not ZapThink, maybe there's someone else on this list that can
coordinate such an independent benchmark.


Chris Parkerson
Product Manager
eXcelon Corporation
Burlington, MA
(781) 674-5393

-----Original Message-----
From: Bill Lindsey [mailto:bill@b...] 
Sent: Monday, September 10, 2001 1:08 PM
To: xml-dev@l...
Subject: Re: storing xml files into database

Frank Richards wrote:
> XML is a tree of elements. Naively mapping that tree onto a table
causes the
> RDBMS to
> thrash it's guts out doing joins to go down the tree -- 
[ ... ]
> XML in an
> RDBMS can easily hit six or seven joins per query.

A typical, naive definition of a "nodes" table does lead to unacceptable

performance due to the necessity of many self-joins.  It is possible, 
however, to devise a scheme for encoding nodes' context in a compact 
form, optimized for an RDBMS' indexing facility, and build a
generic table structure, capable of storing any well-formed
XML, yet does not exhibit the self-join problem.

With this technique, one can:
* leverage the mature ACID properties of commercial RDBMSs
* support any well formed XML with no additional developer or DBA effort
* provide fine-grained, random access to the content of large
* efficiently query on content and/or structure

Bill Lindsey

The xml-dev list is sponsored by XML.org <http://www.xml.org>, an
initiative of OASIS <http://www.oasis-open.org>

The list archives are at http://lists.xml.org/archives/xml-dev/

To subscribe or unsubscribe from this elist use the subscription
manager: <http://lists.xml.org/ob/adm.pl>


Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
First Name
Last Name
Subscribe in XML format
RSS 2.0
Atom 0.3

Stylus Studio has published XML-DEV in RSS and ATOM formats, enabling users to easily subcribe to the list from their preferred news reader application.

Stylus Studio Sponsored Links are added links designed to provide related and additional information to the visitors of this website. they were not included by the author in the initial post. To view the content without the Sponsor Links please click here.

Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.