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https://issues.apache.org/jira/browse/HBASE-26762?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Duo Zhang resolved HBASE-26762.
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Hadoop Flags: Reviewed
Resolution: Fixed
Pushed to branch-2.5+.
Thanks [~nielsbasjes] for contributing!
Please fill the release note.
> Scan#setRowPrefixFilter incorrectly marked as deprecated
> --------------------------------------------------------
>
> Key: HBASE-26762
> URL: https://issues.apache.org/jira/browse/HBASE-26762
> Project: HBase
> Issue Type: Bug
> Components: Client, scan
> Affects Versions: 3.0.0-alpha-2
> Reporter: Niels Basjes
> Assignee: Niels Basjes
> Priority: Major
>
> Issue HBASE-25299 is about the Scan#setRowPrefixFilter having not the
> expected effects when using also the setStartRow and/or setStopRow.
> The setRowPrefixFilter is intended to make setting the right startRow and
> stopRow for prefix scans. So it was always intended of using it *instead* of
> doing separate setStartRow and/or setStopRow calls.
> The reason for adding this to the Scan (~ 8 years ago, HBASE-11990 ) was that
> calculating the correct start and stop row for doing the very efficient
> prefix scan is very very hard to do right in the generic case.
> This is still a current usecase and many of my applications rely on this
> function (I even prefer the HBase Client when connecting to Google BigTable
> for this method).
> With issue HBASE-25299 it has now been marked as deprecated.
> Quote from the changes made in HBASE-25299:
> {code}
> @deprecated since 3.0.0. The scan result might be unexpected in some cases.
> {code}
> Yes, if you use this very valuable method incorrectly it will yield incorrect
> results.
> I do not consider this a valid reason to deprecate it.
> So I do agree with the confusion of the effects as described in HBASE-25299
> which should be fixed with additional documentation.
> I disagree with the deprecation of this method.
>
> I'll put up a pull request in which I improve the documentation and remove
> the deprecation.
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