Re: XQuery & Several records (instead of one xml-field)
Mukul, To nobody's surprise, I agree very strongly with your statements. However, there are also very important environments in which there is very little or no relational data to be considered -- what I might call a "pure document" environment. Such environments can be well supported by an implementation such as Oracle's or DB2's, but there can also be a case made for a "pure XML" database. Trying to be balanced, Jim At 10/19/2007 11:07 AM, Mukul Gandhi wrote: >Hi Mike, > >On 10/19/07, Michael Kay <mike@s...> wrote: > > My experience so far of these hybrid relational/xml systems is that your > > problem as a user is not a lack of functionality, but an excess. There are > > simply too many ways of doing the same thing, and they have too many > > irritating differences - different sets of functions, different rules for > > case independence, different conventions for escaping special characters - > > and different (unpredictably different) performance. I find it hard to > > believe that this ugly hybrid of SQL and XQuery represents the future of > > database technology. I find databases where everything is XML (or indeed > > where everything is tables) much easier to work with. > >I have slight disagreement with your views. > >I think unifying relational data and XML is a good move. Imagine that >an organization has data in RDBMS, as well in the XML form. That >organization needs to produce something (for e.g. reports of some >kind, or say an application) by unifying information from the >relational and XML world. Then we need to join data stored in the >RDBMS and XML. If we don't have a unified relational/XML store, I >think, it'll be slightly difficult to join data from the two worlds >(although not difficult for good application programmers). > >While designing a logical/physical data model of an application, we >can decide to store everything in a hybrid relational/XML database. I >think this is a good strategy. > >-- >Regards, >Mukul Gandhi > >_______________________________________________________________________ > >XML-DEV is a publicly archived, unmoderated list hosted by OASIS >to support XML implementation and development. To minimize >spam in the archives, you must subscribe before posting. > >[Un]Subscribe/change address: http://www.oasis-open.org/mlmanage/ >Or unsubscribe: xml-dev-unsubscribe@l... >subscribe: xml-dev-subscribe@l... >List archive: http://lists.xml.org/archives/xml-dev/ >List Guidelines: http://www.oasis-open.org/maillists/guidelines.php ======================================================================== Jim Melton --- Editor of ISO/IEC 9075-* (SQL) Phone: +1.801.942.0144 Co-Chair, W3C XML Query WG; XQX (etc.) editor Fax : +1.801.942.3345 Oracle Corporation Oracle Email: jim dot melton at oracle dot com 1930 Viscounti Drive Standards email: jim dot melton at acm dot org Sandy, UT 84093-1063 USA Personal email: jim at melton dot name ======================================================================== = Facts are facts. But any opinions expressed are the opinions = = only of myself and may or may not reflect the opinions of anybody = = else with whom I may or may not have discussed the issues at hand. = ========================================================================
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