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https://issues.apache.org/jira/browse/DERBY-4660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12867549#action_12867549
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Dag H. Wanvik commented on DERBY-4660:
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+1
> Expose merge join through optimizer override
> --------------------------------------------
>
> Key: DERBY-4660
> URL: https://issues.apache.org/jira/browse/DERBY-4660
> Project: Derby
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 10.7.0.0
> Reporter: Knut Anders Hatlen
> Priority: Minor
>
> Derby comes with a class called MergeJoinResultSet which is not currently
> used. As a first step towards full support for merge joins, we should expose
> the functionality provided by this class through an optimizer override, so
> that we can start testing it.
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