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https://issues.apache.org/jira/browse/PHOENIX-1192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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James Taylor updated PHOENIX-1192:
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Attachment: PHOENIX-1192.patch
> Re-enable reverse scan to prevent order by
> ------------------------------------------
>
> Key: PHOENIX-1192
> URL: https://issues.apache.org/jira/browse/PHOENIX-1192
> Project: Phoenix
> Issue Type: Bug
> Affects Versions: 5.0.0, 4.1
> Reporter: James Taylor
> Attachments: PHOENIX-1192.patch
>
>
> We have code in place and tested for usage of the reverse scan. It's just
> turned off because the reverse scan ability never made it to 0.94. Now that
> we have 4.x on top of 0.98, we should turn this back on. It's used to
> optimize queries that do an ORDER BY in the descending order of the PK (to
> prevent the standard and expensive order by processing). Prior tests have
> shown a dramatic difference between the two ways of executing the query.
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