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https://issues.apache.org/jira/browse/DERBY-6656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17366651#comment-17366651
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Richard N. Hillegas commented on DERBY-6656:
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No one has worked on this issue yet.
> Re-enable views as the source data sets of MERGE statements
> -----------------------------------------------------------
>
> Key: DERBY-6656
> URL: https://issues.apache.org/jira/browse/DERBY-6656
> Project: Derby
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 10.11.1.1
> Reporter: Richard N. Hillegas
> Priority: Major
>
> The SQL Standard allows views as the source data sets of MERGE statements.
> However, we disabled this feature because of namespace resolution problems
> (see DERBY-6652). Namespace resolution for the MERGE statement needs to be
> overhauled. Some of the issues are described on DERBY-3155. When the
> namespace problems are fixed comprehensively, we may be able to allow the use
> of synonyms and subqueries and perhaps, also, the use of correlation names
> for columns.
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