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From "A B (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-688) Enhancements to XML functionality to move toward XPath/XQuery support...
Date Tue, 08 Aug 2006 22:45:15 GMT
    [ http://issues.apache.org/jira/browse/DERBY-688?page=comments#action_12426762 ] 
            
A B commented on DERBY-688:
---------------------------

Thanks a ton for reviewing and committing this set of the patches, Bryan.  I ran the XML tests
with the latest codeline and verified that things are as they should be.

Many thanks to Yip for taking the time to review, as well!

For ease of  reference, review comments/replies can be found in the following threads:

http://article.gmane.org/gmane.comp.apache.db.derby.devel/25793
http://article.gmane.org/gmane.comp.apache.db.derby.devel/25824

Remaining XML patches are forthcoming, as is documentation for the new functionality.

Thanks again Bryan and Yip (and David VC for recruiting help!).

> Enhancements to XML functionality to move toward XPath/XQuery support...
> ------------------------------------------------------------------------
>
>                 Key: DERBY-688
>                 URL: http://issues.apache.org/jira/browse/DERBY-688
>             Project: Derby
>          Issue Type: Improvement
>          Components: JDBC, SQL
>            Reporter: A B
>         Assigned To: A B
>            Priority: Minor
>         Attachments: d688_phase1_v1.patch, d688_phase1_v1.stat, d688_phase1_v2.patch,
d688_phase1_v3.patch, d688_phase2_v1_code.patch, d688_phase2_v1_tests.patch, d688_phase2_v2_tests.patch,
d688_phase2_v3_tests.patch, d688_phase3_v1_code.patch, d688_phase3_v1_tests.patch, derbyXMLSpec.html
>
>
> As of DERBY-334, Derby has some very basic support for XML that consists of an XML datatype
and three operators (XMLPARSE, XMLSERIALIZE, and XMLEXISTS).  I would like to enhance this
existing functionality and, by doing so, help to move Derby incrementally toward a more usable
and more complete XPath/XQuery solution (with emphasis on "incrementally").
> I have attached to this issue a document describing the particular changes that I am
looking to make.  At a high level, they consist of:
> 1) Making it easier to use the XML operators and datatype from within JDBC (ex. by implicit
parsing/serialization of XML values).
> 2) Adding a new operator, XMLQUERY, to allow a user to retrieve the results of an XPath
expression (instead of just determining whether or not the expression evaluates to an empty
sequence, which is what XMLEXISTS does).
> 3) Making changes to the existing operators to line them up with the SQL/XML 2005 specification,
and also to take steps toward my eventual hope of having support for XQuery (as opposed to
just XPath) in Derby.
> If anyone has time and interest enough to look at the document and provide feedback,
that'd be great...

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