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Date: Thu, 25 Nov 2010 10:35:15 -0500 (EST)
From: "Bryan Pendleton (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Commented: (DERBY-4903) Plan exporter tool produces broken
 output if query contains less-than operator
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    [ https://issues.apache.org/jira/browse/DERBY-4903?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12935777#action_12935777 ] 

Bryan Pendleton commented on DERBY-4903:
----------------------------------------

+1 to not worrying too much about the human-readability of the generated XML.
I think there are plenty of other reformatting tools that an XML-savvy user will
have access to. 

Regarding the selection of which classes to use, I'd like to see us using
the built-in system classes for XML  handling wherever possible. As Nirmal
notes, we were struggling with the availability of these classes, see for
example the discussion of xml-apis.jar in DERBY-4781.

Over time, the core platform Java environments become more sophisticated and
provide more complete XML support, and as that occurs, if we can shift
work away from our own custom code and into system-provided code that
seems like a clear win, so I think it would be great if Knut could preserve
these suggestions for how to do that as part of a JIRA issue somewhere.


> Plan exporter tool produces broken output if query contains less-than operator
> ------------------------------------------------------------------------------
>
>                 Key: DERBY-4903
>                 URL: https://issues.apache.org/jira/browse/DERBY-4903
>             Project: Derby
>          Issue Type: Bug
>          Components: Tools
>    Affects Versions: 10.7.1.0
>            Reporter: Knut Anders Hatlen
>            Assignee: C.S. Nirmal J. Fernando
>         Attachments: derby-4903-a.diff
>
>
> The plan exporter tool fails to produce well-formed output for the following query:
> ij> select * from sysibm.sysdummy1 where ibmreqd < 'Z';
> The generation of XML doesn't fail, but when I open the file in Firefox, I see this message:
> XML Parsing Error: not well-formed
> Location: file:///tmp/plan.xml
> Line Number 9, Column 11:
> Operator: <
> ----------^
> HTML generation prints the following error, and produces an empty file:
> ERROR:  'The value of attribute "scan_qualifiers" associated with an element type "null" must not contain the '<' character.'

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