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Posted to issues@kudu.apache.org by "Mike Percy (JIRA)" <ji...@apache.org> on 2018/12/18 22:28:00 UTC

[jira] [Created] (KUDU-2645) Diff scanner should perform a merge on the rowset iterators at scan time

Mike Percy created KUDU-2645:
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             Summary: 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


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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