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https://issues.apache.org/jira/browse/DERBY-6256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13681649#comment-13681649
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Mike Matrigali commented on DERBY-6256:
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1) databaseMetaData - This is appropriate for use in production code and we
document it.
2) foreignViews - This is also appropriate for use in production code and we
document it.
I think both 1 & 2 are non-standard tools build on top of exposed Standard
table function server technology. If so I think the tools should go into tools
jar, and users who want to
use it pay the price. This is a good model for what I think is the right way
to provide tool technology in derby. Implement standards where possible that
allow extensions to be
built outside the core server. These extensions can be documented/production
quality and still not be part of the core server. Putting it in tools jar
makes it obvious that it does
not affect core technology.
> Move the XmlVTI into the product.
> ---------------------------------
>
> Key: DERBY-6256
> URL: https://issues.apache.org/jira/browse/DERBY-6256
> Project: Derby
> Issue Type: Improvement
> Components: SQL, Tools
> Affects Versions: 10.11.0.0
> Reporter: Rick Hillegas
> Assignee: Rick Hillegas
> Attachments: derby-6256-01-aa-move-XmlVTI-into-product.diff,
> derby-6256-02-aa-allowParentTags.diff
>
>
> The XmlVTI under derbyDemo has been useful to me for many years. It has
> become even more useful now that Derby supports varargs. That is because
> varargs make it very easy to declare an XmlVTI. At this point, I think it is
> worth re-phrasing the XmlVTI in terms of varargs and moving it into the
> product so that we can use it for internal table functions. There is no rush
> to expose XmlVTI as part of Derby's public api, but we could consider doing
> that if other people find this table function to be useful.
> The XmlVTI is a table function which turns an xml file into a tabular data
> set which you can query via sql. When you declare an XmlVTI, you state the
> following arguments:
> 1) The url of an xml file.
> 2) The name of the element in the xml file which you want to treat as a
> record or row.
> 3) The names of the attributes and subelements of that record which you want
> to treat as columns. Now that we have varargs, it is possible to represent
> this trailing argument as a variable length argument list.
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