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https://issues.apache.org/jira/browse/DERBY-5635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13220349#comment-13220349
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Rick Hillegas commented on DERBY-5635:
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Sounds like a good improvement to me, Knut. +1. Thanks.
> Provide implementation for getMetaData() in VTITemplate
> -------------------------------------------------------
>
> Key: DERBY-5635
> URL: https://issues.apache.org/jira/browse/DERBY-5635
> Project: Derby
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 10.9.0.0
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Priority: Minor
> Attachments: d5635.diff
>
>
> VTITemplate defines getMetaData() as an abstract method. That method doesn't
> appear to be needed for user-defined table functions, so it would be good to
> provide a default implementation (could just throw an exception) so that less
> boilerplate is needed when writing table functions. The method does however
> get used by system VTIs, which is probably why it was made abstract in the
> first place. The system VTIs should still override getMetaData().
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