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Posted to issues@kudu.apache.org by "Mike Percy (JIRA)" <ji...@apache.org> on 2018/12/18 22:30:00 UTC
[jira] [Assigned] (KUDU-2645) Diff scanner should perform a merge
on the rowset iterators at scan time
[ https://issues.apache.org/jira/browse/KUDU-2645?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mike Percy reassigned KUDU-2645:
--------------------------------
Assignee: Mike Percy
> Diff scanner should perform a merge on the rowset iterators at scan time
> ------------------------------------------------------------------------
>
> Key: KUDU-2645
> URL: https://issues.apache.org/jira/browse/KUDU-2645
> Project: Kudu
> Issue Type: New Feature
> Components: tablet
> Reporter: Mike Percy
> Assignee: Mike Percy
> Priority: Major
>
> In order to perform a diff scan we will need the MergeIterator to ensure that duplicate ghost rows are not returned in cases where a row was deleted and flushed, then reinserted into a new rowset during the time period covered by the diff scan. In such a case, only one representation of the row should be returned, which is the reinserted one.
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